HG_REPOSITORIES/LPP/SciQLOP_Repos/SciQLop Commit - r1075:029fbf916457

Rename "DragDropHelper" in "DragDropGuiController"

trabillard -

r1075:029fbf916457

parent child

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r1075:029fbf916457

gui/include/DragAndDrop/DragDropGuiController.h ~~gui/include/DragAndDrop/DragDropHelper.h~~ renamed +9 -9

-            #ifndef SCIQLOP_DRAGDROPHELPER_H
+            #ifndef SCIQLOP_DRAGDROPGUICONTROLLER_H
-            #define SCIQLOP_DRAGDROPHELPER_H
+            #define SCIQLOP_DRAGDROPGUICONTROLLER_H
             #include <Common/spimpl.h>
             #include <QLoggingCategory>
             #include <QWidget>
             class QVBoxLayout;
             class QScrollArea;
             class QTabBar;
             class VisualizationDragWidget;
             class VisualizationDragDropContainer;
             class QMimeData;
-            Q_DECLARE_LOGGING_CATEGORY(LOG_DragDropHelper)
+            Q_DECLARE_LOGGING_CATEGORY(LOG_DragDropGuiController)
             /**
              * @brief Helper class for drag&drop operations.
              * @note The helper is accessible from the sqpApp singleton and  has the same life as the whole
              * application (like a controller). But contrary to a controller, it doesn't live in a thread and
              * can interect with the gui.
              * @see SqpApplication
              */
-            class DragDropHelper {
+            class DragDropGuiController {
             public:
                 static const QString MIME_TYPE_GRAPH;
                 static const QString MIME_TYPE_ZONE;
                 enum class PlaceHolderType { Default, Graph, Zone };
-                DragDropHelper();
+                DragDropGuiController();
-                virtual ~DragDropHelper();
+                virtual ~DragDropGuiController();
                 /// Resets some internal variables. Must be called before any new drag&drop operation.
                 void resetDragAndDrop();
                 /// Sets the visualization widget currently being drag on the visualization.
                 void setCurrentDragWidget(VisualizationDragWidget *dragWidget);
                 /// Returns the visualization widget currently being drag on the visualization.
                 /// Can be null if a new visualization widget is intended to be created by the drag&drop
                 /// operation.
                 VisualizationDragWidget *getCurrentDragWidget() const;
                 QWidget &placeHolder() const;
                 void insertPlaceHolder(QVBoxLayout *layout, int index, PlaceHolderType type,
                                        const QString &topLabelText);
                 void removePlaceHolder();
                 bool isPlaceHolderSet() const;
                 /// Checks if the specified mime data is valid for a drop in the visualization
                 bool checkMimeDataForVisualization(const QMimeData *mimeData,
                                                    VisualizationDragDropContainer *dropContainer);
                 void addDragDropScrollArea(QScrollArea *scrollArea);
                 void removeDragDropScrollArea(QScrollArea *scrollArea);
                 void addDragDropTabBar(QTabBar *tabBar);
                 void removeDragDropTabBar(QTabBar *tabBar);
                 QUrl imageTemporaryUrl(const QImage &image) const;
                 void setHightlightedDragWidget(VisualizationDragWidget *dragWidget);
                 VisualizationDragWidget *getHightlightedDragWidget() const;
                 /// Delays the closing of a widget during a drag&drop operation
                 void delayedCloseWidget(QWidget *widget);
                 void doCloseWidgets();
             private:
-                class DragDropHelperPrivate;
+                class DragDropGuiControllerPrivate;
-                spimpl::unique_impl_ptr<DragDropHelperPrivate> impl;
+                spimpl::unique_impl_ptr<DragDropGuiControllerPrivate> impl;
             };
-            #endif // SCIQLOP_DRAGDROPHELPER_H
+            #endif // SCIQLOP_DRAGDROPGUICONTROLLER_H

gui/include/SqpApplication.h +2 -2

             #ifndef SCIQLOP_SQPAPPLICATION_H
             #define SCIQLOP_SQPAPPLICATION_H
             #include "SqpApplication.h"
             #include <QApplication>
             #include <QLoggingCategory>
             #include <Common/spimpl.h>
             Q_DECLARE_LOGGING_CATEGORY(LOG_SqpApplication)
             #if defined(sqpApp)
             #undef sqpApp
             #endif
             #define sqpApp (static_cast<SqpApplication *>(QCoreApplication::instance()))
             class DataSourceController;
             class NetworkController;
             class TimeController;
             class VariableController;
             class VisualizationController;
-            class DragDropHelper;
+            class DragDropGuiController;
             /**
              * @brief The SqpApplication class aims to make the link between SciQlop
              * and its plugins. This is the intermediate class that SciQlop has to use
              * in the way to connect a data source. Please first use load method to initialize
              * a plugin specified by its metadata name (JSON plugin source) then others specifics
              * method will be able to access it.
              * You can load a data source driver plugin then create a data source.
              */
             class SqpApplication : public QApplication {
                 Q_OBJECT
             public:
                 explicit SqpApplication(int &argc, char **argv);
                 virtual ~SqpApplication();
                 void initialize();
                 /// Accessors for the differents sciqlop controllers
                 DataSourceController &dataSourceController() noexcept;
                 NetworkController &networkController() noexcept;
                 TimeController &timeController() noexcept;
                 VariableController &variableController() noexcept;
                 VisualizationController &visualizationController() noexcept;
                 /// Accessors for the differents sciqlop helpers, these helpers classes are like controllers but
                 /// doesn't live in a thread and access gui
-                DragDropHelper &dragDropHelper() noexcept;
+                DragDropGuiController &dragDropGuiController() noexcept;
                 enum class PlotsInteractionMode { None, ZoomBox, DragAndDrop, SelectionZones };
                 enum class PlotsCursorMode { NoCursor, Vertical, Temporal, Horizontal, Cross };
                 PlotsInteractionMode plotsInteractionMode() const;
                 void setPlotsInteractionMode(PlotsInteractionMode mode);
                 PlotsCursorMode plotsCursorMode() const;
                 void setPlotsCursorMode(PlotsCursorMode mode);
             private:
                 class SqpApplicationPrivate;
                 spimpl::unique_impl_ptr<SqpApplicationPrivate> impl;
             };
             #endif // SCIQLOP_SQPAPPLICATION_H

gui/include/Visualization/VisualizationDragDropContainer.h +2 -2

             #ifndef SCIQLOP_VISUALIZATIONDRAGDROPCONTAINER_H
             #define SCIQLOP_VISUALIZATIONDRAGDROPCONTAINER_H
             #include <Common/spimpl.h>
             #include <QFrame>
             #include <QLoggingCategory>
             #include <QMimeData>
             #include <QVBoxLayout>
             #include <functional>
-            #include <DragAndDrop/DragDropHelper.h>
+            #include <DragAndDrop/DragDropGuiController.h>
             Q_DECLARE_LOGGING_CATEGORY(LOG_VisualizationDragDropContainer)
             class VisualizationDragWidget;
             class VisualizationDragDropContainer : public QFrame {
                 Q_OBJECT
             signals:
                 void dropOccuredInContainer(int dropIndex, const QMimeData *mimeData);
                 void dropOccuredOnWidget(VisualizationDragWidget *dragWidget, const QMimeData *mimeData);
             public:
                 enum class DropBehavior { Inserted, Merged, InsertedAndMerged, Forbidden };
                 using AcceptMimeDataFunction = std::function<bool(const QMimeData *mimeData)>;
                 using AcceptDragWidgetFunction
                     = std::function<bool(const VisualizationDragWidget *dragWidget, const QMimeData *mimeData)>;
                 VisualizationDragDropContainer(QWidget *parent = nullptr);
                 void addDragWidget(VisualizationDragWidget *dragWidget);
                 void insertDragWidget(int index, VisualizationDragWidget *dragWidget);
                 void setMimeType(const QString &mimeType, DropBehavior behavior);
                 int countDragWidget() const;
                 void setAcceptMimeDataFunction(AcceptMimeDataFunction fun);
                 void setAcceptDragWidgetFunction(AcceptDragWidgetFunction fun);
-                void setPlaceHolderType(DragDropHelper::PlaceHolderType type,
+                void setPlaceHolderType(DragDropGuiController::PlaceHolderType type,
                                         const QString &placeHolderText = QString());
             protected:
                 void dragEnterEvent(QDragEnterEvent *event);
                 void dragLeaveEvent(QDragLeaveEvent *event);
                 void dragMoveEvent(QDragMoveEvent *event);
                 void dropEvent(QDropEvent *event);
             private:
                 class VisualizationDragDropContainerPrivate;
                 spimpl::unique_impl_ptr<VisualizationDragDropContainerPrivate> impl;
             private slots:
                 void startDrag(VisualizationDragWidget *dragWidget, const QPoint &dragPosition);
             };
             #endif // SCIQLOP_VISUALIZATIONDRAGDROPCONTAINER_H

gui/src/DataSource/DataSourceTreeWidget.cpp +2 -2

             #include "DataSource/DataSourceTreeWidget.h"
             #include "Common/MimeTypesDef.h"
             #include "DataSource/DataSourceController.h"
             #include "DataSource/DataSourceItem.h"
             #include "DataSource/DataSourceTreeWidgetItem.h"
-            #include "DragAndDrop/DragDropHelper.h"
+            #include "DragAndDrop/DragDropGuiController.h"
             #include "SqpApplication.h"
             #include <QMimeData>
             DataSourceTreeWidget::DataSourceTreeWidget(QWidget *parent) : QTreeWidget(parent)
             {
             }
             QMimeData *DataSourceTreeWidget::mimeData(const QList<QTreeWidgetItem *> items) const
             {
                 auto mimeData = new QMimeData;
                 // Basic check to ensure the item are correctly typed
                 Q_ASSERT(items.isEmpty() || dynamic_cast<DataSourceTreeWidgetItem *>(items.first()) != nullptr);
                 QVariantList productData;
                 for (auto item : items) {
                     auto dataSourceTreeItem = static_cast<DataSourceTreeWidgetItem *>(item);
                     auto dataSource = dataSourceTreeItem->data();
                     if (dataSource->type() == DataSourceItemType::COMPONENT
                         || dataSource->type() == DataSourceItemType::PRODUCT) {
                         auto metaData = dataSource->data();
                         productData << metaData;
                     }
                 }
                 auto encodedData = sqpApp->dataSourceController().mimeDataForProductsData(productData);
                 mimeData->setData(MIME_TYPE_PRODUCT_LIST, encodedData);
                 return mimeData;
             }
             void DataSourceTreeWidget::startDrag(Qt::DropActions supportedActions)
             {
                 // Resets the drag&drop operations before it's starting
-                sqpApp->dragDropHelper().resetDragAndDrop();
+                sqpApp->dragDropGuiController().resetDragAndDrop();
                 QTreeWidget::startDrag(supportedActions);
             }

gui/src/DragAndDrop/DragDropGuiController.cpp ~~gui/src/DragAndDrop/DragDropHelper.cpp~~ renamed +34 -32

-            #include "DragAndDrop/DragDropHelper.h"
+            #include "DragAndDrop/DragDropGuiController.h"
             #include "DragAndDrop/DragDropScroller.h"
             #include "DragAndDrop/DragDropTabSwitcher.h"
             #include "SqpApplication.h"
             #include "Visualization/VisualizationDragDropContainer.h"
             #include "Visualization/VisualizationDragWidget.h"
             #include "Visualization/VisualizationWidget.h"
             #include "Visualization/operations/FindVariableOperation.h"
             #include "Variable/Variable.h"
             #include "Variable/VariableController.h"
             #include "Common/MimeTypesDef.h"
             #include "Common/VisualizationDef.h"
             #include <QDir>
             #include <QLabel>
             #include <QUrl>
             #include <QVBoxLayout>
-            Q_LOGGING_CATEGORY(LOG_DragDropHelper, "DragDropHelper")
+            Q_LOGGING_CATEGORY(LOG_DragDropGuiController, "DragDropGuiController")
-            struct DragDropHelper::DragDropHelperPrivate {
+            struct DragDropGuiController::DragDropGuiControllerPrivate {
                 VisualizationDragWidget *m_CurrentDragWidget = nullptr;
                 std::unique_ptr<QWidget> m_PlaceHolder = nullptr;
                 QLabel *m_PlaceHolderLabel;
                 QWidget *m_PlaceBackground;
                 std::unique_ptr<DragDropScroller> m_DragDropScroller = nullptr;
                 std::unique_ptr<DragDropTabSwitcher> m_DragDropTabSwitcher = nullptr;
                 QString m_ImageTempUrl; // Temporary file for image url generated by the drag & drop. Not using
                                         // QTemporaryFile to have a name which is not generated.
                 VisualizationDragWidget *m_HighlightedDragWidget = nullptr;
                 QMetaObject::Connection m_DragWidgetDestroyedConnection;
                 QMetaObject::Connection m_HighlightedWidgetDestroyedConnection;
                 QList<QWidget *> m_WidgetToClose;
-                explicit DragDropHelperPrivate()
+                explicit DragDropGuiControllerPrivate()
                         : m_PlaceHolder{std::make_unique<QWidget>()},
                           m_DragDropScroller{std::make_unique<DragDropScroller>()},
                           m_DragDropTabSwitcher{std::make_unique<DragDropTabSwitcher>()}
                 {
                     auto layout = new QVBoxLayout{m_PlaceHolder.get()};
                     layout->setSpacing(0);
                     layout->setContentsMargins(0, 0, 0, 0);
                     m_PlaceHolderLabel = new QLabel{"", m_PlaceHolder.get()};
                     m_PlaceHolderLabel->setMinimumHeight(25);
                     layout->addWidget(m_PlaceHolderLabel);
                     m_PlaceBackground = new QWidget{m_PlaceHolder.get()};
                     m_PlaceBackground->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
                     layout->addWidget(m_PlaceBackground);
                     sqpApp->installEventFilter(m_DragDropScroller.get());
                     sqpApp->installEventFilter(m_DragDropTabSwitcher.get());
                     m_ImageTempUrl = QDir::temp().absoluteFilePath("Sciqlop_graph.png");
                 }
-                void preparePlaceHolder(DragDropHelper::PlaceHolderType type, const QString &topLabelText) const
+                void preparePlaceHolder(DragDropGuiController::PlaceHolderType type,
+                                        const QString &topLabelText) const
                 {
                     if (m_CurrentDragWidget) {
                         m_PlaceHolder->setMinimumSize(m_CurrentDragWidget->size());
                         m_PlaceHolder->setSizePolicy(m_CurrentDragWidget->sizePolicy());
                     }
                     else {
                         // Configuration of the placeHolder when there is no dragWidget
                         // (for instance with a drag from a variable)
                         m_PlaceHolder->setMinimumSize(0, GRAPH_MINIMUM_HEIGHT);
                         m_PlaceHolder->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
                     }
                     switch (type) {
-                        case DragDropHelper::PlaceHolderType::Graph:
+                        case DragDropGuiController::PlaceHolderType::Graph:
                             m_PlaceBackground->setStyleSheet(
                                 "background-color: #BBD5EE; border: 1px solid #2A7FD4");
                             break;
-                        case DragDropHelper::PlaceHolderType::Zone:
+                        case DragDropGuiController::PlaceHolderType::Zone:
-                        case DragDropHelper::PlaceHolderType::Default:
+                        case DragDropGuiController::PlaceHolderType::Default:
                             m_PlaceBackground->setStyleSheet(
                                 "background-color: #BBD5EE; border: 2px solid #2A7FD4");
                             m_PlaceHolderLabel->setStyleSheet("color: #2A7FD4");
                             break;
                     }
                     m_PlaceHolderLabel->setText(topLabelText);
                     m_PlaceHolderLabel->setVisible(!topLabelText.isEmpty());
                 }
             };
-            DragDropHelper::DragDropHelper() : impl{spimpl::make_unique_impl<DragDropHelperPrivate>()}
+            DragDropGuiController::DragDropGuiController()
+                    : impl{spimpl::make_unique_impl<DragDropGuiControllerPrivate>()}
             {
             }
-            DragDropHelper::~DragDropHelper()
+            DragDropGuiController::~DragDropGuiController()
             {
                 QFile::remove(impl->m_ImageTempUrl);
             }
-            void DragDropHelper::resetDragAndDrop()
+            void DragDropGuiController::resetDragAndDrop()
             {
                 setCurrentDragWidget(nullptr);
                 impl->m_HighlightedDragWidget = nullptr;
             }
-            void DragDropHelper::setCurrentDragWidget(VisualizationDragWidget *dragWidget)
+            void DragDropGuiController::setCurrentDragWidget(VisualizationDragWidget *dragWidget)
             {
                 if (impl->m_CurrentDragWidget) {
                     QObject::disconnect(impl->m_DragWidgetDestroyedConnection);
                 }
                 if (dragWidget) {
                     // ensures the impl->m_CurrentDragWidget is reset when the widget is destroyed
                     impl->m_DragWidgetDestroyedConnection
                         = QObject::connect(dragWidget, &VisualizationDragWidget::destroyed,
                                            [this]() { impl->m_CurrentDragWidget = nullptr; });
                 }
                 impl->m_CurrentDragWidget = dragWidget;
             }
-            VisualizationDragWidget *DragDropHelper::getCurrentDragWidget() const
+            VisualizationDragWidget *DragDropGuiController::getCurrentDragWidget() const
             {
                 return impl->m_CurrentDragWidget;
             }
-            QWidget &DragDropHelper::placeHolder() const
+            QWidget &DragDropGuiController::placeHolder() const
             {
                 return *impl->m_PlaceHolder;
             }
-            void DragDropHelper::insertPlaceHolder(QVBoxLayout *layout, int index, PlaceHolderType type,
+            void DragDropGuiController::insertPlaceHolder(QVBoxLayout *layout, int index, PlaceHolderType type,
                                                           const QString &topLabelText)
             {
                 removePlaceHolder();
                 impl->preparePlaceHolder(type, topLabelText);
                 layout->insertWidget(index, impl->m_PlaceHolder.get());
                 impl->m_PlaceHolder->show();
             }
-            void DragDropHelper::removePlaceHolder()
+            void DragDropGuiController::removePlaceHolder()
             {
                 auto parentWidget = impl->m_PlaceHolder->parentWidget();
                 if (parentWidget) {
                     parentWidget->layout()->removeWidget(impl->m_PlaceHolder.get());
                     impl->m_PlaceHolder->setParent(nullptr);
                     impl->m_PlaceHolder->hide();
                 }
             }
-            bool DragDropHelper::isPlaceHolderSet() const
+            bool DragDropGuiController::isPlaceHolderSet() const
             {
                 return impl->m_PlaceHolder->parentWidget();
             }
-            void DragDropHelper::addDragDropScrollArea(QScrollArea *scrollArea)
+            void DragDropGuiController::addDragDropScrollArea(QScrollArea *scrollArea)
             {
                 impl->m_DragDropScroller->addScrollArea(scrollArea);
             }
-            void DragDropHelper::removeDragDropScrollArea(QScrollArea *scrollArea)
+            void DragDropGuiController::removeDragDropScrollArea(QScrollArea *scrollArea)
             {
                 impl->m_DragDropScroller->removeScrollArea(scrollArea);
             }
-            void DragDropHelper::addDragDropTabBar(QTabBar *tabBar)
+            void DragDropGuiController::addDragDropTabBar(QTabBar *tabBar)
             {
                 impl->m_DragDropTabSwitcher->addTabBar(tabBar);
             }
-            void DragDropHelper::removeDragDropTabBar(QTabBar *tabBar)
+            void DragDropGuiController::removeDragDropTabBar(QTabBar *tabBar)
             {
                 impl->m_DragDropTabSwitcher->removeTabBar(tabBar);
             }
-            QUrl DragDropHelper::imageTemporaryUrl(const QImage &image) const
+            QUrl DragDropGuiController::imageTemporaryUrl(const QImage &image) const
             {
                 image.save(impl->m_ImageTempUrl);
                 return QUrl::fromLocalFile(impl->m_ImageTempUrl);
             }
-            void DragDropHelper::setHightlightedDragWidget(VisualizationDragWidget *dragWidget)
+            void DragDropGuiController::setHightlightedDragWidget(VisualizationDragWidget *dragWidget)
             {
                 if (impl->m_HighlightedDragWidget) {
                     impl->m_HighlightedDragWidget->highlightForMerge(false);
                     QObject::disconnect(impl->m_HighlightedWidgetDestroyedConnection);
                 }
                 if (dragWidget) {
                     dragWidget->highlightForMerge(true);
                     // ensures the impl->m_HighlightedDragWidget is reset when the widget is destroyed
                     impl->m_DragWidgetDestroyedConnection
                         = QObject::connect(dragWidget, &VisualizationDragWidget::destroyed,
                                            [this]() { impl->m_HighlightedDragWidget = nullptr; });
                 }
                 impl->m_HighlightedDragWidget = dragWidget;
             }
-            VisualizationDragWidget *DragDropHelper::getHightlightedDragWidget() const
+            VisualizationDragWidget *DragDropGuiController::getHightlightedDragWidget() const
             {
                 return impl->m_HighlightedDragWidget;
             }
-            void DragDropHelper::delayedCloseWidget(QWidget *widget)
+            void DragDropGuiController::delayedCloseWidget(QWidget *widget)
             {
                 widget->hide();
                 impl->m_WidgetToClose << widget;
             }
-            void DragDropHelper::doCloseWidgets()
+            void DragDropGuiController::doCloseWidgets()
             {
                 for (auto widget : impl->m_WidgetToClose) {
                     widget->close();
                 }
                 impl->m_WidgetToClose.clear();
             }
-            bool DragDropHelper::checkMimeDataForVisualization(const QMimeData *mimeData,
+            bool DragDropGuiController::checkMimeDataForVisualization(
-                                                               VisualizationDragDropContainer *dropContainer)
+                const QMimeData *mimeData, VisualizationDragDropContainer *dropContainer)
             {
                 if (!mimeData || !dropContainer) {
-                    qCWarning(LOG_DragDropHelper()) << QObject::tr(
+                    qCWarning(LOG_DragDropGuiController()) << QObject::tr(
-                        "DragDropHelper::checkMimeDataForVisualization, invalid input parameters.");
+                        "DragDropGuiController::checkMimeDataForVisualization, invalid input parameters.");
                     Q_ASSERT(false);
                     return false;
                 }
                 auto result = false;
                 if (mimeData->hasFormat(MIME_TYPE_VARIABLE_LIST)) {
                     auto variables = sqpApp->variableController().variablesForMimeData(
                         mimeData->data(MIME_TYPE_VARIABLE_LIST));
                     if (variables.count() == 1) {
                         auto variable = variables.first();
                         if (variable->dataSeries() != nullptr) {
                             // Check that the variable is not already in a graph
                             auto parent = dropContainer->parentWidget();
                             while (parent && qobject_cast<VisualizationWidget *>(parent) == nullptr) {
                                 parent = parent->parentWidget(); // Search for the top level VisualizationWidget
                             }
                             if (parent) {
                                 auto visualizationWidget = static_cast<VisualizationWidget *>(parent);
                                 FindVariableOperation findVariableOperation{variable};
                                 visualizationWidget->accept(&findVariableOperation);
                                 auto variableContainers = findVariableOperation.result();
                                 if (variableContainers.empty()) {
                                     result = true;
                                 }
                                 else {
                                     // result = false: the variable already exist in the visualisation
                                 }
                             }
                             else {
-                                qCWarning(LOG_DragDropHelper()) << QObject::tr(
+                                qCWarning(LOG_DragDropGuiController()) << QObject::tr(
-                                    "DragDropHelper::checkMimeDataForVisualization, the parent "
+                                    "DragDropGuiController::checkMimeDataForVisualization, the parent "
                                     "VisualizationWidget cannot be found. Cannot check if the variable is "
                                     "already used or not.");
                             }
                         }
                         else {
                             // result = false: the variable is not fully loaded
                         }
                     }
                     else {
                         // result = false: cannot drop multiple variables in the visualisation
                     }
                 }
                 else {
                     // Other MIME data
                     // no special rules, accepted by default
                     result = true;
                 }
                 return result;
             }

gui/src/SqpApplication.cpp +5 -5

             #include "SqpApplication.h"
             #include <Catalogue/CatalogueController.h>
             #include <Data/IDataProvider.h>
             #include <DataSource/DataSourceController.h>
-            #include <DragAndDrop/DragDropHelper.h>
+            #include <DragAndDrop/DragDropGuiController.h>
             #include <Network/NetworkController.h>
             #include <QThread>
             #include <Time/TimeController.h>
             #include <Variable/Variable.h>
             #include <Variable/VariableController.h>
             #include <Variable/VariableModel.h>
             #include <Visualization/VisualizationController.h>
             Q_LOGGING_CATEGORY(LOG_SqpApplication, "SqpApplication")
             class SqpApplication::SqpApplicationPrivate {
             public:
                 SqpApplicationPrivate()
                         : m_DataSourceController{std::make_unique<DataSourceController>()},
                           m_VariableController{std::make_unique<VariableController>()},
                           m_TimeController{std::make_unique<TimeController>()},
                           m_NetworkController{std::make_unique<NetworkController>()},
                           m_VisualizationController{std::make_unique<VisualizationController>()},
-                          m_DragDropHelper{std::make_unique<DragDropHelper>()},
+                          m_DragDropGuiController{std::make_unique<DragDropGuiController>()},
                           m_CatalogueController{std::make_unique<CatalogueController>()},
                           m_PlotInterractionMode(SqpApplication::PlotsInteractionMode::None),
                           m_PlotCursorMode(SqpApplication::PlotsCursorMode::NoCursor)
                 {
                     // /////////////////////////////// //
                     // Connections between controllers //
                     // /////////////////////////////// //
                     // VariableController <-> DataSourceController
                     connect(m_DataSourceController.get(),
                             SIGNAL(variableCreationRequested(const QString &, const QVariantHash &,
                                                              std::shared_ptr<IDataProvider>)),
                             m_VariableController.get(),
                             SLOT(createVariable(const QString &, const QVariantHash &,
                                                 std::shared_ptr<IDataProvider>)));
                     connect(m_VariableController->variableModel(), &VariableModel::requestVariable,
                             m_DataSourceController.get(), &DataSourceController::requestVariable);
                     // VariableController <-> VisualizationController
                     connect(m_VariableController.get(),
                             SIGNAL(variableAboutToBeDeleted(std::shared_ptr<Variable>)),
                             m_VisualizationController.get(),
                             SIGNAL(variableAboutToBeDeleted(std::shared_ptr<Variable>)), Qt::DirectConnection);
                     connect(m_VariableController.get(),
                             SIGNAL(rangeChanged(std::shared_ptr<Variable>, const SqpRange &)),
                             m_VisualizationController.get(),
                             SIGNAL(rangeChanged(std::shared_ptr<Variable>, const SqpRange &)));
                     m_DataSourceController->moveToThread(&m_DataSourceControllerThread);
                     m_DataSourceControllerThread.setObjectName("DataSourceControllerThread");
                     m_NetworkController->moveToThread(&m_NetworkControllerThread);
                     m_NetworkControllerThread.setObjectName("NetworkControllerThread");
                     m_VariableController->moveToThread(&m_VariableControllerThread);
                     m_VariableControllerThread.setObjectName("VariableControllerThread");
                     m_VisualizationController->moveToThread(&m_VisualizationControllerThread);
                     m_VisualizationControllerThread.setObjectName("VsualizationControllerThread");
                     m_CatalogueController->moveToThread(&m_CatalogueControllerThread);
                     m_CatalogueControllerThread.setObjectName("CatalogueControllerThread");
                     // Additionnal init
                     m_VariableController->setTimeController(m_TimeController.get());
                 }
                 virtual ~SqpApplicationPrivate()
                 {
                     m_DataSourceControllerThread.quit();
                     m_DataSourceControllerThread.wait();
                     m_NetworkControllerThread.quit();
                     m_NetworkControllerThread.wait();
                     m_VariableControllerThread.quit();
                     m_VariableControllerThread.wait();
                     m_VisualizationControllerThread.quit();
                     m_VisualizationControllerThread.wait();
                     m_CatalogueControllerThread.quit();
                     m_CatalogueControllerThread.wait();
                 }
                 std::unique_ptr<DataSourceController> m_DataSourceController;
                 std::unique_ptr<VariableController> m_VariableController;
                 std::unique_ptr<TimeController> m_TimeController;
                 std::unique_ptr<NetworkController> m_NetworkController;
                 std::unique_ptr<VisualizationController> m_VisualizationController;
                 std::unique_ptr<CatalogueController> m_CatalogueController;
                 QThread m_DataSourceControllerThread;
                 QThread m_NetworkControllerThread;
                 QThread m_VariableControllerThread;
                 QThread m_VisualizationControllerThread;
                 QThread m_CatalogueControllerThread;
-                std::unique_ptr<DragDropHelper> m_DragDropHelper;
+                std::unique_ptr<DragDropGuiController> m_DragDropGuiController;
                 SqpApplication::PlotsInteractionMode m_PlotInterractionMode;
                 SqpApplication::PlotsCursorMode m_PlotCursorMode;
             };
             SqpApplication::SqpApplication(int &argc, char **argv)
                     : QApplication{argc, argv}, impl{spimpl::make_unique_impl<SqpApplicationPrivate>()}
             {
                 qCDebug(LOG_SqpApplication()) << tr("SqpApplication construction") << QThread::currentThread();
                 connect(&impl->m_DataSourceControllerThread, &QThread::started,
                         impl->m_DataSourceController.get(), &DataSourceController::initialize);
                 connect(&impl->m_DataSourceControllerThread, &QThread::finished,
                         impl->m_DataSourceController.get(), &DataSourceController::finalize);
                 connect(&impl->m_NetworkControllerThread, &QThread::started, impl->m_NetworkController.get(),
                         &NetworkController::initialize);
                 connect(&impl->m_NetworkControllerThread, &QThread::finished, impl->m_NetworkController.get(),
                         &NetworkController::finalize);
                 connect(&impl->m_VariableControllerThread, &QThread::started, impl->m_VariableController.get(),
                         &VariableController::initialize);
                 connect(&impl->m_VariableControllerThread, &QThread::finished, impl->m_VariableController.get(),
                         &VariableController::finalize);
                 connect(&impl->m_VisualizationControllerThread, &QThread::started,
                         impl->m_VisualizationController.get(), &VisualizationController::initialize);
                 connect(&impl->m_VisualizationControllerThread, &QThread::finished,
                         impl->m_VisualizationController.get(), &VisualizationController::finalize);
                 connect(&impl->m_CatalogueControllerThread, &QThread::started,
                         impl->m_CatalogueController.get(), &CatalogueController::initialize);
                 connect(&impl->m_CatalogueControllerThread, &QThread::finished,
                         impl->m_CatalogueController.get(), &CatalogueController::finalize);
                 impl->m_DataSourceControllerThread.start();
                 impl->m_NetworkControllerThread.start();
                 impl->m_VariableControllerThread.start();
                 impl->m_VisualizationControllerThread.start();
                 impl->m_CatalogueControllerThread.start();
             }
             SqpApplication::~SqpApplication()
             {
             }
             void SqpApplication::initialize()
             {
             }
             DataSourceController &SqpApplication::dataSourceController() noexcept
             {
                 return *impl->m_DataSourceController;
             }
             NetworkController &SqpApplication::networkController() noexcept
             {
                 return *impl->m_NetworkController;
             }
             TimeController &SqpApplication::timeController() noexcept
             {
                 return *impl->m_TimeController;
             }
             VariableController &SqpApplication::variableController() noexcept
             {
                 return *impl->m_VariableController;
             }
             VisualizationController &SqpApplication::visualizationController() noexcept
             {
                 return *impl->m_VisualizationController;
             }
-            DragDropHelper &SqpApplication::dragDropHelper() noexcept
+            DragDropGuiController &SqpApplication::dragDropGuiController() noexcept
             {
-                return *impl->m_DragDropHelper;
+                return *impl->m_DragDropGuiController;
             }
             SqpApplication::PlotsInteractionMode SqpApplication::plotsInteractionMode() const
             {
                 return impl->m_PlotInterractionMode;
             }
             void SqpApplication::setPlotsInteractionMode(SqpApplication::PlotsInteractionMode mode)
             {
                 impl->m_PlotInterractionMode = mode;
             }
             SqpApplication::PlotsCursorMode SqpApplication::plotsCursorMode() const
             {
                 return impl->m_PlotCursorMode;
             }
             void SqpApplication::setPlotsCursorMode(SqpApplication::PlotsCursorMode mode)
             {
                 impl->m_PlotCursorMode = mode;
             }

gui/src/TimeWidget/TimeWidget.cpp +2 -2

             #include "TimeWidget/TimeWidget.h"
             #include "ui_TimeWidget.h"
             #include <Common/DateUtils.h>
             #include <Common/MimeTypesDef.h>
-            #include <DragAndDrop/DragDropHelper.h>
+            #include <DragAndDrop/DragDropGuiController.h>
             #include <SqpApplication.h>
             #include <Time/TimeController.h>
             #include <QDrag>
             #include <QDragEnterEvent>
             #include <QDropEvent>
             #include <QMimeData>
             struct TimeWidget::TimeWidgetPrivate {
                 explicit TimeWidgetPrivate() {}
                 QPoint m_DragStartPosition;
             };
             TimeWidget::TimeWidget(QWidget *parent)
                     : QWidget{parent},
                       ui{new Ui::TimeWidget},
                       impl{spimpl::make_unique_impl<TimeWidgetPrivate>()}
             {
                 ui->setupUi(this);
                 ui->applyToolButton->setIcon(sqpApp->style()->standardIcon(QStyle::SP_DialogApplyButton));
                 // Connection
                 connect(ui->startDateTimeEdit, &QDateTimeEdit::dateTimeChanged, this,
                         &TimeWidget::onTimeUpdateRequested);
                 connect(ui->endDateTimeEdit, &QDateTimeEdit::dateTimeChanged, this,
                         &TimeWidget::onTimeUpdateRequested);
                 connect(ui->applyToolButton, &QToolButton::clicked, &sqpApp->timeController(),
                         &TimeController::onTimeNotify);
                 // Initialisation
                 auto endDateTime = QDateTime::currentDateTimeUtc();
                 auto startDateTime = endDateTime.addSecs(-3600); // one hour before
                 ui->startDateTimeEdit->setDateTime(startDateTime);
                 ui->endDateTimeEdit->setDateTime(endDateTime);
                 auto dateTime = SqpRange{DateUtils::secondsSinceEpoch(startDateTime),
                                          DateUtils::secondsSinceEpoch(endDateTime)};
                 sqpApp->timeController().onTimeToUpdate(dateTime);
             }
             TimeWidget::~TimeWidget()
             {
                 delete ui;
             }
             void TimeWidget::setTimeRange(SqpRange time)
             {
                 auto startDateTime = DateUtils::dateTime(time.m_TStart);
                 auto endDateTime = DateUtils::dateTime(time.m_TEnd);
                 ui->startDateTimeEdit->setDateTime(startDateTime);
                 ui->endDateTimeEdit->setDateTime(endDateTime);
             }
             SqpRange TimeWidget::timeRange() const
             {
                 return SqpRange{DateUtils::secondsSinceEpoch(ui->startDateTimeEdit->dateTime()),
                                 DateUtils::secondsSinceEpoch(ui->endDateTimeEdit->dateTime())};
             }
             void TimeWidget::onTimeUpdateRequested()
             {
                 auto dateTime = timeRange();
                 emit timeUpdated(std::move(dateTime));
             }
             void TimeWidget::dragEnterEvent(QDragEnterEvent *event)
             {
                 if (event->mimeData()->hasFormat(MIME_TYPE_TIME_RANGE)) {
                     event->acceptProposedAction();
                     setStyleSheet("QDateTimeEdit{background-color: #BBD5EE; border:2px solid #2A7FD4}");
                 }
                 else {
                     event->ignore();
                 }
             }
             void TimeWidget::dragLeaveEvent(QDragLeaveEvent *event)
             {
                 setStyleSheet(QString{});
             }
             void TimeWidget::dropEvent(QDropEvent *event)
             {
                 if (event->mimeData()->hasFormat(MIME_TYPE_TIME_RANGE)) {
                     auto mimeData = event->mimeData()->data(MIME_TYPE_TIME_RANGE);
                     auto timeRange = TimeController::timeRangeForMimeData(mimeData);
                     setTimeRange(timeRange);
                 }
                 else {
                     event->ignore();
                 }
                 setStyleSheet(QString{});
             }
             void TimeWidget::mousePressEvent(QMouseEvent *event)
             {
                 if (event->button() == Qt::LeftButton) {
                     impl->m_DragStartPosition = event->pos();
                 }
                 QWidget::mousePressEvent(event);
             }
             void TimeWidget::mouseMoveEvent(QMouseEvent *event)
             {
                 if (!(event->buttons() & Qt::LeftButton)) {
                     return;
                 }
                 if ((event->pos() - impl->m_DragStartPosition).manhattanLength()
                     < QApplication::startDragDistance()) {
                     return;
                 }
                 // Note: The management of the drag object is done by Qt
                 auto drag = new QDrag{this};
                 auto mimeData = new QMimeData;
                 auto timeData = TimeController::mimeDataForTimeRange(timeRange());
                 mimeData->setData(MIME_TYPE_TIME_RANGE, timeData);
                 drag->setMimeData(mimeData);
                 auto pixmap = QPixmap{":/icones/time.png"};
                 drag->setPixmap(pixmap.scaledToWidth(22));
-                sqpApp->dragDropHelper().resetDragAndDrop();
+                sqpApp->dragDropGuiController().resetDragAndDrop();
                 // Note: The exec() is blocking on windows but not on linux and macOS
                 drag->exec(Qt::MoveAction | Qt::CopyAction);
                 QWidget::mouseMoveEvent(event);
             }

gui/src/Variable/VariableInspectorTableView.cpp +2 -2

             #include "Variable/VariableInspectorTableView.h"
-            #include "DragAndDrop/DragDropHelper.h"
+            #include "DragAndDrop/DragDropGuiController.h"
             #include "SqpApplication.h"
             VariableInspectorTableView::VariableInspectorTableView(QWidget *parent) : QTableView(parent)
             {
             }
             void VariableInspectorTableView::startDrag(Qt::DropActions supportedActions)
             {
                 // Resets the drag&drop operations before it's starting
-                sqpApp->dragDropHelper().resetDragAndDrop();
+                sqpApp->dragDropGuiController().resetDragAndDrop();
                 QTableView::startDrag(supportedActions);
             }

gui/src/Variable/VariableInspectorWidget.cpp +1 -1

             #include <Variable/RenameVariableDialog.h>
             #include <Variable/Variable.h>
             #include <Variable/VariableController.h>
             #include <Variable/VariableInspectorWidget.h>
             #include <Variable/VariableMenuHeaderWidget.h>
             #include <Variable/VariableModel.h>
             #include <ui_VariableInspectorWidget.h>
             #include <QMouseEvent>
             #include <QSortFilterProxyModel>
             #include <QStyledItemDelegate>
             #include <QWidgetAction>
-            #include <DragAndDrop/DragDropHelper.h>
+            #include <DragAndDrop/DragDropGuiController.h>
             #include <SqpApplication.h>
             Q_LOGGING_CATEGORY(LOG_VariableInspectorWidget, "VariableInspectorWidget")
             class QProgressBarItemDelegate : public QStyledItemDelegate {
             public:
                 QProgressBarItemDelegate(QObject *parent) : QStyledItemDelegate{parent} {}
                 void paint(QPainter *painter, const QStyleOptionViewItem &option,
                            const QModelIndex &index) const
                 {
                     auto data = index.data(Qt::DisplayRole);
                     auto progressData = index.data(VariableRoles::ProgressRole);
                     if (data.isValid() && progressData.isValid()) {
                         auto name = data.value<QString>();
                         auto progress = progressData.value<double>();
                         if (progress > 0) {
                             auto cancelButtonWidth = 20;
                             auto progressBarOption = QStyleOptionProgressBar{};
                             auto progressRect = option.rect;
                             progressRect.setWidth(progressRect.width() - cancelButtonWidth);
                             progressBarOption.rect = progressRect;
                             progressBarOption.minimum = 0;
                             progressBarOption.maximum = 100;
                             progressBarOption.progress = progress;
                             progressBarOption.text
                                 = QString("%1 %2").arg(name).arg(QString::number(progress, 'f', 2) + "%");
                             progressBarOption.textVisible = true;
                             progressBarOption.textAlignment = Qt::AlignCenter;
                             QApplication::style()->drawControl(QStyle::CE_ProgressBar, &progressBarOption,
                                                                painter);
                             // Cancel button
                             auto buttonRect = QRect(progressRect.right(), option.rect.top(), cancelButtonWidth,
                                                     option.rect.height());
                             auto buttonOption = QStyleOptionButton{};
                             buttonOption.rect = buttonRect;
                             buttonOption.text = "X";
                             QApplication::style()->drawControl(QStyle::CE_PushButton, &buttonOption, painter);
                         }
                         else {
                             QStyledItemDelegate::paint(painter, option, index);
                         }
                     }
                     else {
                         QStyledItemDelegate::paint(painter, option, index);
                     }
                 }
                 bool editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option,
                                  const QModelIndex &index)
                 {
                     if (event->type() == QEvent::MouseButtonRelease) {
                         auto data = index.data(Qt::DisplayRole);
                         auto progressData = index.data(VariableRoles::ProgressRole);
                         if (data.isValid() && progressData.isValid()) {
                             auto cancelButtonWidth = 20;
                             auto progressRect = option.rect;
                             progressRect.setWidth(progressRect.width() - cancelButtonWidth);
                             // Cancel button
                             auto buttonRect = QRect(progressRect.right(), option.rect.top(), cancelButtonWidth,
                                                     option.rect.height());
                             auto e = (QMouseEvent *)event;
                             auto clickX = e->x();
                             auto clickY = e->y();
                             auto x = buttonRect.left();   // the X coordinate
                             auto y = buttonRect.top();    // the Y coordinate
                             auto w = buttonRect.width();  // button width
                             auto h = buttonRect.height(); // button height
                             if (clickX > x && clickX < x + w) {
                                 if (clickY > y && clickY < y + h) {
                                     auto variableModel = sqpApp->variableController().variableModel();
                                     variableModel->abortProgress(index);
                                 }
                                 return true;
                             }
                             else {
                                 return QStyledItemDelegate::editorEvent(event, model, option, index);
                             }
                         }
                         else {
                             return QStyledItemDelegate::editorEvent(event, model, option, index);
                         }
                     }
                     else {
                         return QStyledItemDelegate::editorEvent(event, model, option, index);
                     }
                     return QStyledItemDelegate::editorEvent(event, model, option, index);
                 }
             };
             VariableInspectorWidget::VariableInspectorWidget(QWidget *parent)
                     : QWidget{parent},
                       ui{new Ui::VariableInspectorWidget},
                       m_ProgressBarItemDelegate{new QProgressBarItemDelegate{this}}
             {
                 ui->setupUi(this);
                 // Sets model for table
                 //    auto sortFilterModel = new QSortFilterProxyModel{this};
                 //    sortFilterModel->setSourceModel(sqpApp->variableController().variableModel());
                 auto variableModel = sqpApp->variableController().variableModel();
                 ui->tableView->setModel(variableModel);
                 // Adds extra signal/slot between view and model, so the view can be updated instantly when
                 // there is a change of data in the model
                 connect(variableModel, SIGNAL(dataChanged(const QModelIndex &, const QModelIndex &)), this,
                         SLOT(refresh()));
                 ui->tableView->setSelectionModel(sqpApp->variableController().variableSelectionModel());
                 ui->tableView->setItemDelegateForColumn(0, m_ProgressBarItemDelegate);
                 // Fixes column sizes
                 auto model = ui->tableView->model();
                 const auto count = model->columnCount();
                 for (auto i = 0; i < count; ++i) {
                     ui->tableView->setColumnWidth(
                         i, model->headerData(i, Qt::Horizontal, Qt::SizeHintRole).toSize().width());
                 }
                 // Sets selection options
                 ui->tableView->setSelectionBehavior(QTableView::SelectRows);
                 ui->tableView->setSelectionMode(QTableView::ExtendedSelection);
                 // Connection to show a menu when right clicking on the tree
                 ui->tableView->setContextMenuPolicy(Qt::CustomContextMenu);
                 connect(ui->tableView, &QTableView::customContextMenuRequested, this,
                         &VariableInspectorWidget::onTableMenuRequested);
             }
             VariableInspectorWidget::~VariableInspectorWidget()
             {
                 delete ui;
             }
             void VariableInspectorWidget::onTableMenuRequested(const QPoint &pos) noexcept
             {
                 auto selectedRows = ui->tableView->selectionModel()->selectedRows();
                 // Gets the model to retrieve the underlying selected variables
                 auto model = sqpApp->variableController().variableModel();
                 auto selectedVariables = QVector<std::shared_ptr<Variable> >{};
                 for (const auto &selectedRow : qAsConst(selectedRows)) {
                     if (auto selectedVariable = model->variable(selectedRow.row())) {
                         selectedVariables.push_back(selectedVariable);
                     }
                 }
                 QMenu tableMenu{};
                 // Emits a signal so that potential receivers can populate the menu before displaying it
                 emit tableMenuAboutToBeDisplayed(&tableMenu, selectedVariables);
                 // Adds menu-specific actions
                 if (!selectedVariables.isEmpty()) {
                     tableMenu.addSeparator();
                     // 'Rename' and 'Duplicate' actions (only if one variable selected)
                     if (selectedVariables.size() == 1) {
                         auto selectedVariable = selectedVariables.front();
                         auto duplicateFun = [varW = std::weak_ptr<Variable>(selectedVariable)]()
                         {
                             if (auto var = varW.lock()) {
                                 sqpApp->variableController().cloneVariable(var);
                             }
                         };
                         tableMenu.addAction(tr("Duplicate"), duplicateFun);
                         auto renameFun = [ varW = std::weak_ptr<Variable>(selectedVariable), &model, this ]()
                         {
                             if (auto var = varW.lock()) {
                                 // Generates forbidden names (names associated to existing variables)
                                 auto allVariables = model->variables();
                                 auto forbiddenNames = QVector<QString>(allVariables.size());
                                 std::transform(allVariables.cbegin(), allVariables.cend(),
                                                forbiddenNames.begin(),
                                                [](const auto &variable) { return variable->name(); });
                                 RenameVariableDialog dialog{var->name(), forbiddenNames, this};
                                 if (dialog.exec() == QDialog::Accepted) {
                                     var->setName(dialog.name());
                                 }
                             }
                         };
                         tableMenu.addAction(tr("Rename..."), renameFun);
                     }
                     // 'Delete' action
                     auto deleteFun = [&selectedVariables]() {
                         sqpApp->variableController().deleteVariables(selectedVariables);
                     };
                     tableMenu.addAction(QIcon{":/icones/delete.png"}, tr("Delete"), deleteFun);
                 }
                 if (!tableMenu.isEmpty()) {
                     // Generates menu header (inserted before first action)
                     auto firstAction = tableMenu.actions().first();
                     auto headerAction = new QWidgetAction{&tableMenu};
                     headerAction->setDefaultWidget(new VariableMenuHeaderWidget{selectedVariables, &tableMenu});
                     tableMenu.insertAction(firstAction, headerAction);
                     // Displays menu
                     tableMenu.exec(QCursor::pos());
                 }
             }
             void VariableInspectorWidget::refresh() noexcept
             {
                 ui->tableView->viewport()->update();
             }

gui/src/Visualization/VisualizationDragDropContainer.cpp +13 -12

             #include "Visualization/VisualizationDragDropContainer.h"
-            #include "DragAndDrop/DragDropHelper.h"
+            #include "DragAndDrop/DragDropGuiController.h"
             #include "SqpApplication.h"
             #include "Visualization/VisualizationDragWidget.h"
             #include "Common/VisualizationDef.h"
             #include <QDrag>
             #include <QDragEnterEvent>
             #include <QVBoxLayout>
             #include <cmath>
             #include <memory>
             Q_LOGGING_CATEGORY(LOG_VisualizationDragDropContainer, "VisualizationDragDropContainer")
             auto DRAGGED_MINIATURE_WIDTH = 200; // in pixels
             struct VisualizationDragDropContainer::VisualizationDragDropContainerPrivate {
                 QVBoxLayout *m_Layout;
                 QHash<QString, VisualizationDragDropContainer::DropBehavior> m_AcceptedMimeTypes;
                 QString m_PlaceHolderText;
-                DragDropHelper::PlaceHolderType m_PlaceHolderType;
+                DragDropGuiController::PlaceHolderType m_PlaceHolderType;
                 VisualizationDragDropContainer::AcceptMimeDataFunction m_AcceptMimeDataFun
                     = [](auto mimeData) { return true; };
                 VisualizationDragDropContainer::AcceptDragWidgetFunction m_AcceptDragWidgetFun
                     = [](auto dragWidget, auto mimeData) { return true; };
                 int m_MinContainerHeight = 0;
                 explicit VisualizationDragDropContainerPrivate(QWidget *widget)
-                        : m_PlaceHolderType(DragDropHelper::PlaceHolderType::Graph)
+                        : m_PlaceHolderType(DragDropGuiController::PlaceHolderType::Graph)
                 {
                     m_Layout = new QVBoxLayout(widget);
                     m_Layout->setContentsMargins(0, 0, 0, 0);
                 }
                 bool acceptMimeData(const QMimeData *data) const
                 {
                     auto accepted = false;
                     for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd();
                          ++it) {
                         const auto &type = it.key();
                         const auto &behavior = it.value();
                         if (data->hasFormat(type)) {
                             if (behavior != DropBehavior::Forbidden) {
                                 accepted = true;
                             }
                             else {
                                 accepted = false;
                                 break;
                             }
                         }
                     }
                     if (accepted) {
                         accepted = m_AcceptMimeDataFun(data);
                     }
                     return accepted;
                 }
                 bool allowMergeForMimeData(const QMimeData *data) const
                 {
                     auto result = false;
                     for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd();
                          ++it) {
                         if (data->hasFormat(it.key())
                             && (it.value() == VisualizationDragDropContainer::DropBehavior::Merged
                                 || it.value()
                                        == VisualizationDragDropContainer::DropBehavior::InsertedAndMerged)) {
                             result = true;
                         }
                         else if (data->hasFormat(it.key())
                                  && it.value() == VisualizationDragDropContainer::DropBehavior::Inserted) {
                             // Merge is forbidden if the mime data contain an acceptable type which cannot be
                             // merged
                             result = false;
                             break;
                         }
                     }
                     return result;
                 }
                 bool allowInsertForMimeData(const QMimeData *data) const
                 {
                     for (auto it = m_AcceptedMimeTypes.constBegin(); it != m_AcceptedMimeTypes.constEnd();
                          ++it) {
                         if (data->hasFormat(it.key())
                             && (it.value() == VisualizationDragDropContainer::DropBehavior::Inserted
                                 || it.value()
                                        == VisualizationDragDropContainer::DropBehavior::InsertedAndMerged)) {
                             return true;
                         }
                     }
                     return false;
                 }
                 bool hasPlaceHolder() const
                 {
-                    return sqpApp->dragDropHelper().placeHolder().parentWidget() == m_Layout->parentWidget();
+                    return sqpApp->dragDropGuiController().placeHolder().parentWidget()
+                           == m_Layout->parentWidget();
                 }
                 VisualizationDragWidget *getChildDragWidgetAt(const QWidget *parent, const QPoint &pos) const
                 {
                     VisualizationDragWidget *dragWidget = nullptr;
                     for (auto child : parent->children()) {
                         auto widget = qobject_cast<VisualizationDragWidget *>(child);
                         if (widget && widget->isVisible()) {
                             if (widget->frameGeometry().contains(pos)) {
                                 dragWidget = widget;
                                 break;
                             }
                         }
                     }
                     return dragWidget;
                 }
                 bool cursorIsInContainer(QWidget *container) const
                 {
                     auto widgetUnderMouse = sqpApp->widgetAt(QCursor::pos());
                     return container->isAncestorOf(widgetUnderMouse) && widgetUnderMouse != container
-                           && sqpApp->dragDropHelper().placeHolder().isAncestorOf(widgetUnderMouse);
+                           && sqpApp->dragDropGuiController().placeHolder().isAncestorOf(widgetUnderMouse);
                 }
                 int countDragWidget(const QWidget *parent, bool onlyVisible = false) const
                 {
                     auto nbGraph = 0;
                     for (auto child : parent->children()) {
                         if (qobject_cast<VisualizationDragWidget *>(child)) {
                             if (!onlyVisible || qobject_cast<VisualizationDragWidget *>(child)->isVisible()) {
                                 nbGraph += 1;
                             }
                         }
                     }
                     return nbGraph;
                 }
                 bool findPlaceHolderPosition(const QPoint &pos, const QMimeData *mimeData, bool canInsert,
                                              bool canMerge, const VisualizationDragDropContainer *container);
             };
             VisualizationDragDropContainer::VisualizationDragDropContainer(QWidget *parent)
                     : QFrame{parent},
                       impl{spimpl::make_unique_impl<VisualizationDragDropContainerPrivate>(this)}
             {
                 setAcceptDrops(true);
             }
             void VisualizationDragDropContainer::addDragWidget(VisualizationDragWidget *dragWidget)
             {
                 impl->m_Layout->addWidget(dragWidget);
                 disconnect(dragWidget, &VisualizationDragWidget::dragDetected, nullptr, nullptr);
                 connect(dragWidget, &VisualizationDragWidget::dragDetected, this,
                         &VisualizationDragDropContainer::startDrag);
             }
             void VisualizationDragDropContainer::insertDragWidget(int index,
                                                                   VisualizationDragWidget *dragWidget)
             {
                 impl->m_Layout->insertWidget(index, dragWidget);
                 disconnect(dragWidget, &VisualizationDragWidget::dragDetected, nullptr, nullptr);
                 connect(dragWidget, &VisualizationDragWidget::dragDetected, this,
                         &VisualizationDragDropContainer::startDrag);
             }
             void VisualizationDragDropContainer::setMimeType(
                 const QString &mimeType, VisualizationDragDropContainer::DropBehavior behavior)
             {
                 impl->m_AcceptedMimeTypes[mimeType] = behavior;
             }
             int VisualizationDragDropContainer::countDragWidget() const
             {
                 return impl->countDragWidget(this);
             }
             void VisualizationDragDropContainer::setAcceptMimeDataFunction(
                 VisualizationDragDropContainer::AcceptMimeDataFunction fun)
             {
                 impl->m_AcceptMimeDataFun = fun;
             }
             void VisualizationDragDropContainer::setAcceptDragWidgetFunction(
                 VisualizationDragDropContainer::AcceptDragWidgetFunction fun)
             {
                 impl->m_AcceptDragWidgetFun = fun;
             }
-            void VisualizationDragDropContainer::setPlaceHolderType(DragDropHelper::PlaceHolderType type,
+            void VisualizationDragDropContainer::setPlaceHolderType(DragDropGuiController::PlaceHolderType type,
                                                                     const QString &placeHolderText)
             {
                 impl->m_PlaceHolderType = type;
                 impl->m_PlaceHolderText = placeHolderText;
             }
             void VisualizationDragDropContainer::startDrag(VisualizationDragWidget *dragWidget,
                                                            const QPoint &dragPosition)
             {
-                auto &helper = sqpApp->dragDropHelper();
+                auto &helper = sqpApp->dragDropGuiController();
                 helper.resetDragAndDrop();
                 // Note: The management of the drag object is done by Qt
                 auto drag = new QDrag{dragWidget};
                 auto mimeData = dragWidget->mimeData(dragPosition);
                 drag->setMimeData(mimeData);
                 auto pixmap = dragWidget->customDragPixmap(dragPosition);
                 if (pixmap.isNull()) {
                     pixmap = QPixmap{dragWidget->size()};
                     dragWidget->render(&pixmap);
                 }
                 drag->setPixmap(pixmap.scaled(DRAGGED_MINIATURE_WIDTH, DRAGGED_MINIATURE_WIDTH,
                                               Qt::KeepAspectRatio, Qt::SmoothTransformation));
                 auto image = pixmap.toImage();
                 mimeData->setImageData(image);
                 mimeData->setUrls({helper.imageTemporaryUrl(image)});
                 if (impl->m_Layout->indexOf(dragWidget) >= 0) {
                     if (impl->acceptMimeData(mimeData) && impl->allowInsertForMimeData(mimeData)) {
                         helper.setCurrentDragWidget(dragWidget);
                         if (impl->cursorIsInContainer(this)) {
                             auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget);
                             helper.insertPlaceHolder(impl->m_Layout, dragWidgetIndex, impl->m_PlaceHolderType,
                                                      impl->m_PlaceHolderText);
                             dragWidget->setVisible(false);
                         }
                         else {
                             // The drag starts directly outside the drop zone
                             // do not add the placeHolder
                         }
                     }
                     drag->exec(Qt::MoveAction | Qt::CopyAction, Qt::MoveAction);
                     helper.doCloseWidgets();
                 }
                 else {
                     qCWarning(LOG_VisualizationDragDropContainer())
                         << tr("VisualizationDragDropContainer::startDrag, drag aborted, the specified "
                               "VisualizationDragWidget is not found in this container.");
                 }
             }
             void VisualizationDragDropContainer::dragEnterEvent(QDragEnterEvent *event)
             {
                 if (impl->acceptMimeData(event->mimeData())) {
                     event->acceptProposedAction();
-                    auto &helper = sqpApp->dragDropHelper();
+                    auto &helper = sqpApp->dragDropGuiController();
                     if (!impl->hasPlaceHolder()) {
                         auto dragWidget = helper.getCurrentDragWidget();
                         if (dragWidget) {
                             // If the drag&drop is internal to the visualization, entering the container hide
                             // the dragWidget which was made visible by the dragLeaveEvent
                             auto parentWidget
                                 = qobject_cast<VisualizationDragDropContainer *>(dragWidget->parentWidget());
                             if (parentWidget) {
                                 dragWidget->setVisible(false);
                             }
                         }
                         auto canMerge = impl->allowMergeForMimeData(event->mimeData());
                         auto canInsert = impl->allowInsertForMimeData(event->mimeData());
                         if (!impl->findPlaceHolderPosition(event->pos(), event->mimeData(), canInsert, canMerge,
                                                            this)) {
                             event->ignore();
                         }
                     }
                     else {
                         // do nothing
                     }
                 }
                 else {
                     event->ignore();
                 }
                 QWidget::dragEnterEvent(event);
             }
             void VisualizationDragDropContainer::dragLeaveEvent(QDragLeaveEvent *event)
             {
                 Q_UNUSED(event);
-                auto &helper = sqpApp->dragDropHelper();
+                auto &helper = sqpApp->dragDropGuiController();
                 if (!impl->cursorIsInContainer(this)) {
                     helper.removePlaceHolder();
                     helper.setHightlightedDragWidget(nullptr);
                     impl->m_MinContainerHeight = 0;
                     auto dragWidget = helper.getCurrentDragWidget();
                     if (dragWidget) {
                         // dragWidget has a value only if the drag is started from the visualization
                         // In that case, shows the drag widget at its original place
                         // So the drag widget doesn't stay hidden if the drop occurs outside the visualization
                         // drop zone (It is not possible to catch a drop event outside of the application)
                         if (dragWidget) {
                             dragWidget->setVisible(true);
                         }
                     }
                 }
                 else {
                     // Leave event probably received for a child widget.
                     // Do nothing.
                     // Note: The DragLeave event, doesn't have any mean to determine who sent it.
                 }
                 QWidget::dragLeaveEvent(event);
             }
             void VisualizationDragDropContainer::dragMoveEvent(QDragMoveEvent *event)
             {
                 if (impl->acceptMimeData(event->mimeData())) {
                     auto canMerge = impl->allowMergeForMimeData(event->mimeData());
                     auto canInsert = impl->allowInsertForMimeData(event->mimeData());
                     impl->findPlaceHolderPosition(event->pos(), event->mimeData(), canInsert, canMerge, this);
                 }
                 else {
                     event->ignore();
                 }
                 QWidget::dragMoveEvent(event);
             }
             void VisualizationDragDropContainer::dropEvent(QDropEvent *event)
             {
-                auto &helper = sqpApp->dragDropHelper();
+                auto &helper = sqpApp->dragDropGuiController();
                 if (impl->acceptMimeData(event->mimeData())) {
                     auto dragWidget = helper.getCurrentDragWidget();
                     if (impl->hasPlaceHolder()) {
                         // drop where the placeHolder is located
                         auto canInsert = impl->allowInsertForMimeData(event->mimeData());
                         if (canInsert) {
                             auto droppedIndex = impl->m_Layout->indexOf(&helper.placeHolder());
                             if (dragWidget) {
                                 auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget);
                                 if (dragWidgetIndex >= 0 && dragWidgetIndex < droppedIndex) {
                                     // Correction of the index if the drop occurs in the same container
                                     // and if the drag is started from the visualization (in that case, the
                                     // dragWidget is hidden)
                                     droppedIndex -= 1;
                                 }
                                 dragWidget->setVisible(true);
                             }
                             event->acceptProposedAction();
                             helper.removePlaceHolder();
                             emit dropOccuredInContainer(droppedIndex, event->mimeData());
                         }
                         else {
                             qCWarning(LOG_VisualizationDragDropContainer()) << tr(
                                 "VisualizationDragDropContainer::dropEvent, dropping on the placeHolder, but "
                                 "the insertion is forbidden.");
                             Q_ASSERT(false);
                         }
                     }
                     else if (helper.getHightlightedDragWidget()) {
                         // drop on the highlighted widget
                         auto canMerge = impl->allowMergeForMimeData(event->mimeData());
                         if (canMerge) {
                             event->acceptProposedAction();
                             emit dropOccuredOnWidget(helper.getHightlightedDragWidget(), event->mimeData());
                         }
                         else {
                             qCWarning(LOG_VisualizationDragDropContainer())
                                 << tr("VisualizationDragDropContainer::dropEvent, dropping on a widget, but "
                                       "the merge is forbidden.");
                             Q_ASSERT(false);
                         }
                     }
                 }
                 else {
                     event->ignore();
                 }
-                sqpApp->dragDropHelper().setHightlightedDragWidget(nullptr);
+                sqpApp->dragDropGuiController().setHightlightedDragWidget(nullptr);
                 impl->m_MinContainerHeight = 0;
                 QWidget::dropEvent(event);
             }
             bool VisualizationDragDropContainer::VisualizationDragDropContainerPrivate::findPlaceHolderPosition(
                 const QPoint &pos, const QMimeData *mimeData, bool canInsert, bool canMerge,
                 const VisualizationDragDropContainer *container)
             {
-                auto &helper = sqpApp->dragDropHelper();
+                auto &helper = sqpApp->dragDropGuiController();
                 auto absPos = container->mapToGlobal(pos);
                 auto isOnPlaceHolder = helper.placeHolder().isAncestorOf(sqpApp->widgetAt(absPos));
                 if (countDragWidget(container, true) == 0) {
                     // Drop on an empty container, just add the placeHolder at the top
                     helper.insertPlaceHolder(m_Layout, 0, m_PlaceHolderType, m_PlaceHolderText);
                 }
                 else if (!isOnPlaceHolder) {
                     auto nbDragWidget = countDragWidget(container);
                     if (nbDragWidget > 0) {
                         if (m_MinContainerHeight == 0) {
                             m_MinContainerHeight = container->size().height();
                         }
                         m_MinContainerHeight = qMin(m_MinContainerHeight, container->size().height());
                         auto graphHeight = qMax(m_MinContainerHeight / nbDragWidget, GRAPH_MINIMUM_HEIGHT);
                         auto posY = pos.y();
                         auto dropIndex = floor(posY / graphHeight);
                         auto zoneSize = qMin(graphHeight / 4.0, 75.0);
                         auto isOnTop = posY < dropIndex * graphHeight + zoneSize;
                         auto isOnBottom = posY > (dropIndex + 1) * graphHeight - zoneSize;
                         auto placeHolderIndex = m_Layout->indexOf(&(helper.placeHolder()));
                         auto dragWidgetHovered = getChildDragWidgetAt(container, pos);
                         if (canInsert && (isOnTop || isOnBottom || !canMerge)) {
                             if (isOnBottom) {
                                 dropIndex += 1;
                             }
                             if (helper.getCurrentDragWidget()) {
                                 auto dragWidgetIndex = m_Layout->indexOf(helper.getCurrentDragWidget());
                                 if (dragWidgetIndex >= 0 && dragWidgetIndex <= dropIndex) {
                                     // Correction of the index if the drop occurs in the same container
                                     // and if the drag is started from the visualization (in that case, the
                                     // dragWidget is hidden)
                                     dropIndex += 1;
                                 }
                             }
                             if (dropIndex != placeHolderIndex) {
                                 helper.insertPlaceHolder(m_Layout, dropIndex, m_PlaceHolderType,
                                                          m_PlaceHolderText);
                             }
                             helper.setHightlightedDragWidget(nullptr);
                         }
                         else if (canMerge && dragWidgetHovered) {
                             // drop on the middle -> merge
                             if (hasPlaceHolder()) {
                                 helper.removePlaceHolder();
                             }
                             if (m_AcceptDragWidgetFun(dragWidgetHovered, mimeData)) {
                                 helper.setHightlightedDragWidget(dragWidgetHovered);
                                 return true;
                             }
                             else {
                                 return false;
                             }
                         }
                         else {
                             qCWarning(LOG_VisualizationDragDropContainer())
                                 << tr("VisualizationDragDropContainer::findPlaceHolderPosition, no valid drop "
                                       "action.");
                         }
                     }
                     else {
                         qCWarning(LOG_VisualizationDragDropContainer())
                             << tr("VisualizationDragDropContainer::findPlaceHolderPosition, no widget "
                                   "found in the "
                                   "container");
                     }
                 }
                 else {
                     // the mouse is hover the placeHolder
                     // Do nothing
                 }
                 return true;
             }

gui/src/Visualization/VisualizationGraphWidget.cpp +1 -1

             #include "Visualization/VisualizationGraphWidget.h"
             #include "Visualization/IVisualizationWidgetVisitor.h"
             #include "Visualization/VisualizationCursorItem.h"
             #include "Visualization/VisualizationDefs.h"
             #include "Visualization/VisualizationGraphHelper.h"
             #include "Visualization/VisualizationGraphRenderingDelegate.h"
             #include "Visualization/VisualizationSelectionZoneItem.h"
             #include "Visualization/VisualizationSelectionZoneManager.h"
             #include "Visualization/VisualizationWidget.h"
             #include "Visualization/VisualizationZoneWidget.h"
             #include "ui_VisualizationGraphWidget.h"
             #include <Common/MimeTypesDef.h>
             #include <Data/ArrayData.h>
             #include <Data/IDataSeries.h>
             #include <Data/SpectrogramSeries.h>
-            #include <DragAndDrop/DragDropHelper.h>
+            #include <DragAndDrop/DragDropGuiController.h>
             #include <Settings/SqpSettingsDefs.h>
             #include <SqpApplication.h>
             #include <Time/TimeController.h>
             #include <Variable/Variable.h>
             #include <Variable/VariableController.h>
             #include <unordered_map>
             Q_LOGGING_CATEGORY(LOG_VisualizationGraphWidget, "VisualizationGraphWidget")
             namespace {
             /// Key pressed to enable drag&drop in all modes
             const auto DRAG_DROP_MODIFIER = Qt::AltModifier;
             /// Key pressed to enable zoom on horizontal axis
             const auto HORIZONTAL_ZOOM_MODIFIER = Qt::ControlModifier;
             /// Key pressed to enable zoom on vertical axis
             const auto VERTICAL_ZOOM_MODIFIER = Qt::ShiftModifier;
             /// Speed of a step of a wheel event for a pan, in percentage of the axis range
             const auto PAN_SPEED = 5;
             /// Key pressed to enable a calibration pan
             const auto VERTICAL_PAN_MODIFIER = Qt::AltModifier;
             /// Key pressed to enable multi selection of selection zones
             const auto MULTI_ZONE_SELECTION_MODIFIER = Qt::ControlModifier;
             /// Minimum size for the zoom box, in percentage of the axis range
             const auto ZOOM_BOX_MIN_SIZE = 0.8;
             /// Format of the dates appearing in the label of a cursor
             const auto CURSOR_LABELS_DATETIME_FORMAT = QStringLiteral("yyyy/MM/dd\nhh:mm:ss:zzz");
             } // namespace
             struct VisualizationGraphWidget::VisualizationGraphWidgetPrivate {
                 explicit VisualizationGraphWidgetPrivate(const QString &name)
                         : m_Name{name},
                           m_DoAcquisition{true},
                           m_IsCalibration{false},
                           m_RenderingDelegate{nullptr}
                 {
                 }
                 void updateData(PlottablesMap &plottables, std::shared_ptr<IDataSeries> dataSeries,
                                 const SqpRange &range)
                 {
                     VisualizationGraphHelper::updateData(plottables, dataSeries, range);
                     // Prevents that data has changed to update rendering
                     m_RenderingDelegate->onPlotUpdated();
                 }
                 QString m_Name;
                 // 1 variable -> n qcpplot
                 std::map<std::shared_ptr<Variable>, PlottablesMap> m_VariableToPlotMultiMap;
                 bool m_DoAcquisition;
                 bool m_IsCalibration;
                 /// Delegate used to attach rendering features to the plot
                 std::unique_ptr<VisualizationGraphRenderingDelegate> m_RenderingDelegate;
                 QCPItemRect *m_DrawingZoomRect = nullptr;
                 QStack<QPair<QCPRange, QCPRange> > m_ZoomStack;
                 std::unique_ptr<VisualizationCursorItem> m_HorizontalCursor = nullptr;
                 std::unique_ptr<VisualizationCursorItem> m_VerticalCursor = nullptr;
                 VisualizationSelectionZoneItem *m_DrawingZone = nullptr;
                 VisualizationSelectionZoneItem *m_HoveredZone = nullptr;
                 QVector<VisualizationSelectionZoneItem *> m_SelectionZones;
                 bool m_HasMovedMouse = false; // Indicates if the mouse moved in a releaseMouse even
                 void startDrawingRect(const QPoint &pos, QCustomPlot &plot)
                 {
                     removeDrawingRect(plot);
                     auto axisPos = posToAxisPos(pos, plot);
                     m_DrawingZoomRect = new QCPItemRect{&plot};
                     QPen p;
                     p.setWidth(2);
                     m_DrawingZoomRect->setPen(p);
                     m_DrawingZoomRect->topLeft->setCoords(axisPos);
                     m_DrawingZoomRect->bottomRight->setCoords(axisPos);
                 }
                 void removeDrawingRect(QCustomPlot &plot)
                 {
                     if (m_DrawingZoomRect) {
                         plot.removeItem(m_DrawingZoomRect); // the item is deleted by QCustomPlot
                         m_DrawingZoomRect = nullptr;
                         plot.replot(QCustomPlot::rpQueuedReplot);
                     }
                 }
                 void startDrawingZone(const QPoint &pos, VisualizationGraphWidget *graph)
                 {
                     endDrawingZone(graph);
                     auto axisPos = posToAxisPos(pos, graph->plot());
                     m_DrawingZone = new VisualizationSelectionZoneItem{&graph->plot()};
                     m_DrawingZone->setRange(axisPos.x(), axisPos.x());
                     m_DrawingZone->setEditionEnabled(false);
                 }
                 void endDrawingZone(VisualizationGraphWidget *graph)
                 {
                     if (m_DrawingZone) {
                         auto drawingZoneRange = m_DrawingZone->range();
                         if (qAbs(drawingZoneRange.m_TEnd - drawingZoneRange.m_TStart) > 0) {
                             m_DrawingZone->setEditionEnabled(true);
                             addSelectionZone(m_DrawingZone);
                         }
                         else {
                             graph->plot().removeItem(m_DrawingZone); // the item is deleted by QCustomPlot
                         }
                         graph->plot().replot(QCustomPlot::rpQueuedReplot);
                         m_DrawingZone = nullptr;
                     }
                 }
                 void setSelectionZonesEditionEnabled(bool value)
                 {
                     for (auto s : m_SelectionZones) {
                         s->setEditionEnabled(value);
                     }
                 }
                 void addSelectionZone(VisualizationSelectionZoneItem *zone) { m_SelectionZones << zone; }
                 VisualizationSelectionZoneItem *selectionZoneAt(const QPoint &pos,
                                                                 const QCustomPlot &plot) const
                 {
                     VisualizationSelectionZoneItem *selectionZoneItemUnderCursor = nullptr;
                     auto minDistanceToZone = -1;
                     for (auto zone : m_SelectionZones) {
                         auto distanceToZone = zone->selectTest(pos, false);
                         if ((minDistanceToZone < 0 || distanceToZone <= minDistanceToZone)
                             && distanceToZone >= 0 && distanceToZone < plot.selectionTolerance()) {
                             selectionZoneItemUnderCursor = zone;
                         }
                     }
                     return selectionZoneItemUnderCursor;
                 }
                 QPointF posToAxisPos(const QPoint &pos, QCustomPlot &plot) const
                 {
                     auto axisX = plot.axisRect()->axis(QCPAxis::atBottom);
                     auto axisY = plot.axisRect()->axis(QCPAxis::atLeft);
                     return QPointF{axisX->pixelToCoord(pos.x()), axisY->pixelToCoord(pos.y())};
                 }
                 bool pointIsInAxisRect(const QPointF &axisPoint, QCustomPlot &plot) const
                 {
                     auto axisX = plot.axisRect()->axis(QCPAxis::atBottom);
                     auto axisY = plot.axisRect()->axis(QCPAxis::atLeft);
                     return axisX->range().contains(axisPoint.x()) && axisY->range().contains(axisPoint.y());
                 }
             };
             VisualizationGraphWidget::VisualizationGraphWidget(const QString &name, QWidget *parent)
                     : VisualizationDragWidget{parent},
                       ui{new Ui::VisualizationGraphWidget},
                       impl{spimpl::make_unique_impl<VisualizationGraphWidgetPrivate>(name)}
             {
                 ui->setupUi(this);
                 // 'Close' options : widget is deleted when closed
                 setAttribute(Qt::WA_DeleteOnClose);
                 // Set qcpplot properties :
                 // - zoom is enabled
                 // - Mouse wheel on qcpplot is intercepted to determine the zoom orientation
                 ui->widget->setInteractions(QCP::iRangeZoom);
                 ui->widget->axisRect()->setRangeDrag(Qt::Horizontal | Qt::Vertical);
                 // The delegate must be initialized after the ui as it uses the plot
                 impl->m_RenderingDelegate = std::make_unique<VisualizationGraphRenderingDelegate>(*this);
                 // Init the cursors
                 impl->m_HorizontalCursor = std::make_unique<VisualizationCursorItem>(&plot());
                 impl->m_HorizontalCursor->setOrientation(Qt::Horizontal);
                 impl->m_VerticalCursor = std::make_unique<VisualizationCursorItem>(&plot());
                 impl->m_VerticalCursor->setOrientation(Qt::Vertical);
                 connect(ui->widget, &QCustomPlot::mousePress, this, &VisualizationGraphWidget::onMousePress);
                 connect(ui->widget, &QCustomPlot::mouseRelease, this,
                         &VisualizationGraphWidget::onMouseRelease);
                 connect(ui->widget, &QCustomPlot::mouseMove, this, &VisualizationGraphWidget::onMouseMove);
                 connect(ui->widget, &QCustomPlot::mouseWheel, this, &VisualizationGraphWidget::onMouseWheel);
                 connect(ui->widget, &QCustomPlot::mouseDoubleClick, this,
                         &VisualizationGraphWidget::onMouseDoubleClick);
                 connect(
                     ui->widget->xAxis,
                     static_cast<void (QCPAxis::*)(const QCPRange &, const QCPRange &)>(&QCPAxis::rangeChanged),
                     this, &VisualizationGraphWidget::onRangeChanged, Qt::DirectConnection);
                 // Activates menu when right clicking on the graph
                 ui->widget->setContextMenuPolicy(Qt::CustomContextMenu);
                 connect(ui->widget, &QCustomPlot::customContextMenuRequested, this,
                         &VisualizationGraphWidget::onGraphMenuRequested);
                 connect(this, &VisualizationGraphWidget::requestDataLoading, &sqpApp->variableController(),
                         &VariableController::onRequestDataLoading);
                 connect(&sqpApp->variableController(), &VariableController::updateVarDisplaying, this,
                         &VisualizationGraphWidget::onUpdateVarDisplaying);
             #ifdef Q_OS_MAC
                 plot().setPlottingHint(QCP::phFastPolylines, true);
             #endif
             }
             VisualizationGraphWidget::~VisualizationGraphWidget()
             {
                 delete ui;
             }
             VisualizationZoneWidget *VisualizationGraphWidget::parentZoneWidget() const noexcept
             {
                 auto parent = parentWidget();
                 while (parent != nullptr && !qobject_cast<VisualizationZoneWidget *>(parent)) {
                     parent = parent->parentWidget();
                 }
                 return qobject_cast<VisualizationZoneWidget *>(parent);
             }
             VisualizationWidget *VisualizationGraphWidget::parentVisualizationWidget() const
             {
                 auto parent = parentWidget();
                 while (parent != nullptr && !qobject_cast<VisualizationWidget *>(parent)) {
                     parent = parent->parentWidget();
                 }
                 return qobject_cast<VisualizationWidget *>(parent);
             }
             void VisualizationGraphWidget::enableAcquisition(bool enable)
             {
                 impl->m_DoAcquisition = enable;
             }
             void VisualizationGraphWidget::addVariable(std::shared_ptr<Variable> variable, SqpRange range)
             {
                 // Uses delegate to create the qcpplot components according to the variable
                 auto createdPlottables = VisualizationGraphHelper::create(variable, *ui->widget);
                 if (auto dataSeries = variable->dataSeries()) {
                     // Set axes properties according to the units of the data series
                     impl->m_RenderingDelegate->setAxesProperties(dataSeries);
                     // Sets rendering properties for the new plottables
                     // Warning: this method must be called after setAxesProperties(), as it can access to some
                     // axes properties that have to be initialized
                     impl->m_RenderingDelegate->setPlottablesProperties(dataSeries, createdPlottables);
                 }
                 impl->m_VariableToPlotMultiMap.insert({variable, std::move(createdPlottables)});
                 connect(variable.get(), SIGNAL(updated()), this, SLOT(onDataCacheVariableUpdated()));
                 this->enableAcquisition(false);
                 this->setGraphRange(range);
                 this->enableAcquisition(true);
                 emit requestDataLoading(QVector<std::shared_ptr<Variable> >() << variable, range, false);
                 emit variableAdded(variable);
             }
             void VisualizationGraphWidget::removeVariable(std::shared_ptr<Variable> variable) noexcept
             {
                 // Each component associated to the variable :
                 // - is removed from qcpplot (which deletes it)
                 // - is no longer referenced in the map
                 auto variableIt = impl->m_VariableToPlotMultiMap.find(variable);
                 if (variableIt != impl->m_VariableToPlotMultiMap.cend()) {
                     emit variableAboutToBeRemoved(variable);
                     auto &plottablesMap = variableIt->second;
                     for (auto plottableIt = plottablesMap.cbegin(), plottableEnd = plottablesMap.cend();
                          plottableIt != plottableEnd;) {
                         ui->widget->removePlottable(plottableIt->second);
                         plottableIt = plottablesMap.erase(plottableIt);
                     }
                     impl->m_VariableToPlotMultiMap.erase(variableIt);
                 }
                 // Updates graph
                 ui->widget->replot();
             }
             QList<std::shared_ptr<Variable> > VisualizationGraphWidget::variables() const
             {
                 auto variables = QList<std::shared_ptr<Variable> >{};
                 for (auto it = std::cbegin(impl->m_VariableToPlotMultiMap);
                      it != std::cend(impl->m_VariableToPlotMultiMap); ++it) {
                     variables << it->first;
                 }
                 return variables;
             }
             void VisualizationGraphWidget::setYRange(std::shared_ptr<Variable> variable)
             {
                 if (!variable) {
                     qCCritical(LOG_VisualizationGraphWidget()) << "Can't set y-axis range: variable is null";
                     return;
                 }
                 VisualizationGraphHelper::setYAxisRange(variable, *ui->widget);
             }
             SqpRange VisualizationGraphWidget::graphRange() const noexcept
             {
                 auto graphRange = ui->widget->xAxis->range();
                 return SqpRange{graphRange.lower, graphRange.upper};
             }
             void VisualizationGraphWidget::setGraphRange(const SqpRange &range)
             {
                 qCDebug(LOG_VisualizationGraphWidget()) << tr("VisualizationGraphWidget::setGraphRange START");
                 ui->widget->xAxis->setRange(range.m_TStart, range.m_TEnd);
                 ui->widget->replot();
                 qCDebug(LOG_VisualizationGraphWidget()) << tr("VisualizationGraphWidget::setGraphRange END");
             }
             QVector<SqpRange> VisualizationGraphWidget::selectionZoneRanges() const
             {
                 QVector<SqpRange> ranges;
                 for (auto zone : impl->m_SelectionZones) {
                     ranges << zone->range();
                 }
                 return ranges;
             }
             void VisualizationGraphWidget::addSelectionZones(const QVector<SqpRange> &ranges)
             {
                 for (const auto &range : ranges) {
                     // note: ownership is transfered to QCustomPlot
                     auto zone = new VisualizationSelectionZoneItem(&plot());
                     zone->setRange(range.m_TStart, range.m_TEnd);
                     impl->addSelectionZone(zone);
                 }
                 plot().replot(QCustomPlot::rpQueuedReplot);
             }
             void VisualizationGraphWidget::undoZoom()
             {
                 auto zoom = impl->m_ZoomStack.pop();
                 auto axisX = plot().axisRect()->axis(QCPAxis::atBottom);
                 auto axisY = plot().axisRect()->axis(QCPAxis::atLeft);
                 axisX->setRange(zoom.first);
                 axisY->setRange(zoom.second);
                 plot().replot(QCustomPlot::rpQueuedReplot);
             }
             void VisualizationGraphWidget::accept(IVisualizationWidgetVisitor *visitor)
             {
                 if (visitor) {
                     visitor->visit(this);
                 }
                 else {
                     qCCritical(LOG_VisualizationGraphWidget())
                         << tr("Can't visit widget : the visitor is null");
                 }
             }
             bool VisualizationGraphWidget::canDrop(const Variable &variable) const
             {
                 auto isSpectrogram = [](const auto &variable) {
                     return std::dynamic_pointer_cast<SpectrogramSeries>(variable.dataSeries()) != nullptr;
                 };
                 // - A spectrogram series can't be dropped on graph with existing plottables
                 // - No data series can be dropped on graph with existing spectrogram series
                 return isSpectrogram(variable)
                            ? impl->m_VariableToPlotMultiMap.empty()
                            : std::none_of(
                                  impl->m_VariableToPlotMultiMap.cbegin(), impl->m_VariableToPlotMultiMap.cend(),
                                  [isSpectrogram](const auto &entry) { return isSpectrogram(*entry.first); });
             }
             bool VisualizationGraphWidget::contains(const Variable &variable) const
             {
                 // Finds the variable among the keys of the map
                 auto variablePtr = &variable;
                 auto findVariable
                     = [variablePtr](const auto &entry) { return variablePtr == entry.first.get(); };
                 auto end = impl->m_VariableToPlotMultiMap.cend();
                 auto it = std::find_if(impl->m_VariableToPlotMultiMap.cbegin(), end, findVariable);
                 return it != end;
             }
             QString VisualizationGraphWidget::name() const
             {
                 return impl->m_Name;
             }
             QMimeData *VisualizationGraphWidget::mimeData(const QPoint &position) const
             {
                 auto mimeData = new QMimeData;
                 auto selectionZoneItemUnderCursor = impl->selectionZoneAt(position, plot());
                 if (sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::SelectionZones
                     && selectionZoneItemUnderCursor) {
                     mimeData->setData(MIME_TYPE_TIME_RANGE, TimeController::mimeDataForTimeRange(
                                                                 selectionZoneItemUnderCursor->range()));
                     mimeData->setData(MIME_TYPE_SELECTION_ZONE, TimeController::mimeDataForTimeRange(
                                                                     selectionZoneItemUnderCursor->range()));
                 }
                 else {
                     mimeData->setData(MIME_TYPE_GRAPH, QByteArray{});
                     auto timeRangeData = TimeController::mimeDataForTimeRange(graphRange());
                     mimeData->setData(MIME_TYPE_TIME_RANGE, timeRangeData);
                 }
                 return mimeData;
             }
             QPixmap VisualizationGraphWidget::customDragPixmap(const QPoint &dragPosition)
             {
                 auto selectionZoneItemUnderCursor = impl->selectionZoneAt(dragPosition, plot());
                 if (sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::SelectionZones
                     && selectionZoneItemUnderCursor) {
                     auto zoneTopLeft = selectionZoneItemUnderCursor->topLeft->pixelPosition();
                     auto zoneBottomRight = selectionZoneItemUnderCursor->bottomRight->pixelPosition();
                     auto zoneSize = QSizeF{qAbs(zoneBottomRight.x() - zoneTopLeft.x()),
                                            qAbs(zoneBottomRight.y() - zoneTopLeft.y())}
                                         .toSize();
                     auto pixmap = QPixmap(zoneSize);
                     render(&pixmap, QPoint(), QRegion{QRect{zoneTopLeft.toPoint(), zoneSize}});
                     return pixmap;
                 }
                 return QPixmap();
             }
             bool VisualizationGraphWidget::isDragAllowed() const
             {
                 return true;
             }
             void VisualizationGraphWidget::highlightForMerge(bool highlighted)
             {
                 if (highlighted) {
                     plot().setBackground(QBrush(QColor("#BBD5EE")));
                 }
                 else {
                     plot().setBackground(QBrush(Qt::white));
                 }
                 plot().update();
             }
             void VisualizationGraphWidget::addVerticalCursor(double time)
             {
                 impl->m_VerticalCursor->setPosition(time);
                 impl->m_VerticalCursor->setVisible(true);
                 auto text
                     = DateUtils::dateTime(time).toString(CURSOR_LABELS_DATETIME_FORMAT).replace(' ', '\n');
                 impl->m_VerticalCursor->setLabelText(text);
             }
             void VisualizationGraphWidget::addVerticalCursorAtViewportPosition(double position)
             {
                 impl->m_VerticalCursor->setAbsolutePosition(position);
                 impl->m_VerticalCursor->setVisible(true);
                 auto axis = plot().axisRect()->axis(QCPAxis::atBottom);
                 auto text
                     = DateUtils::dateTime(axis->pixelToCoord(position)).toString(CURSOR_LABELS_DATETIME_FORMAT);
                 impl->m_VerticalCursor->setLabelText(text);
             }
             void VisualizationGraphWidget::removeVerticalCursor()
             {
                 impl->m_VerticalCursor->setVisible(false);
                 plot().replot(QCustomPlot::rpQueuedReplot);
             }
             void VisualizationGraphWidget::addHorizontalCursor(double value)
             {
                 impl->m_HorizontalCursor->setPosition(value);
                 impl->m_HorizontalCursor->setVisible(true);
                 impl->m_HorizontalCursor->setLabelText(QString::number(value));
             }
             void VisualizationGraphWidget::addHorizontalCursorAtViewportPosition(double position)
             {
                 impl->m_HorizontalCursor->setAbsolutePosition(position);
                 impl->m_HorizontalCursor->setVisible(true);
                 auto axis = plot().axisRect()->axis(QCPAxis::atLeft);
                 impl->m_HorizontalCursor->setLabelText(QString::number(axis->pixelToCoord(position)));
             }
             void VisualizationGraphWidget::removeHorizontalCursor()
             {
                 impl->m_HorizontalCursor->setVisible(false);
                 plot().replot(QCustomPlot::rpQueuedReplot);
             }
             void VisualizationGraphWidget::closeEvent(QCloseEvent *event)
             {
                 Q_UNUSED(event);
                 // Prevents that all variables will be removed from graph when it will be closed
                 for (auto &variableEntry : impl->m_VariableToPlotMultiMap) {
                     emit variableAboutToBeRemoved(variableEntry.first);
                 }
             }
             void VisualizationGraphWidget::enterEvent(QEvent *event)
             {
                 Q_UNUSED(event);
                 impl->m_RenderingDelegate->showGraphOverlay(true);
             }
             void VisualizationGraphWidget::leaveEvent(QEvent *event)
             {
                 Q_UNUSED(event);
                 impl->m_RenderingDelegate->showGraphOverlay(false);
                 if (auto parentZone = parentZoneWidget()) {
                     parentZone->notifyMouseLeaveGraph(this);
                 }
                 else {
                     qCWarning(LOG_VisualizationGraphWidget()) << "leaveEvent: No parent zone widget";
                 }
                 if (impl->m_HoveredZone) {
                     impl->m_HoveredZone->setHovered(false);
                     impl->m_HoveredZone = nullptr;
                 }
             }
             QCustomPlot &VisualizationGraphWidget::plot() const noexcept
             {
                 return *ui->widget;
             }
             void VisualizationGraphWidget::onGraphMenuRequested(const QPoint &pos) noexcept
             {
                 QMenu graphMenu{};
                 // Iterates on variables (unique keys)
                 for (auto it = impl->m_VariableToPlotMultiMap.cbegin(),
                           end = impl->m_VariableToPlotMultiMap.cend();
                      it != end; it = impl->m_VariableToPlotMultiMap.upper_bound(it->first)) {
                     // 'Remove variable' action
                     graphMenu.addAction(tr("Remove variable %1").arg(it->first->name()),
                                         [ this, var = it->first ]() { removeVariable(var); });
                 }
                 if (!impl->m_ZoomStack.isEmpty()) {
                     if (!graphMenu.isEmpty()) {
                         graphMenu.addSeparator();
                     }
                     graphMenu.addAction(tr("Undo Zoom"), [this]() { undoZoom(); });
                 }
                 if (!graphMenu.isEmpty()) {
                     graphMenu.exec(QCursor::pos());
                 }
             }
             void VisualizationGraphWidget::onRangeChanged(const QCPRange &t1, const QCPRange &t2)
             {
                 qCDebug(LOG_VisualizationGraphWidget())
                     << tr("TORM: VisualizationGraphWidget::onRangeChanged")
                     << QThread::currentThread()->objectName() << "DoAcqui" << impl->m_DoAcquisition;
                 auto graphRange = SqpRange{t1.lower, t1.upper};
                 auto oldGraphRange = SqpRange{t2.lower, t2.upper};
                 if (impl->m_DoAcquisition) {
                     QVector<std::shared_ptr<Variable> > variableUnderGraphVector;
                     for (auto it = impl->m_VariableToPlotMultiMap.begin(),
                               end = impl->m_VariableToPlotMultiMap.end();
                          it != end; it = impl->m_VariableToPlotMultiMap.upper_bound(it->first)) {
                         variableUnderGraphVector.push_back(it->first);
                     }
                     emit requestDataLoading(std::move(variableUnderGraphVector), graphRange,
                                             !impl->m_IsCalibration);
                     if (!impl->m_IsCalibration) {
                         qCDebug(LOG_VisualizationGraphWidget())
                             << tr("TORM: VisualizationGraphWidget::Synchronize notify !!")
                             << QThread::currentThread()->objectName() << graphRange << oldGraphRange;
                         emit synchronize(graphRange, oldGraphRange);
                     }
                 }
                 auto pos = mapFromGlobal(QCursor::pos());
                 auto axisPos = impl->posToAxisPos(pos, plot());
                 if (auto parentZone = parentZoneWidget()) {
                     if (impl->pointIsInAxisRect(axisPos, plot())) {
                         parentZone->notifyMouseMoveInGraph(pos, axisPos, this);
                     }
                     else {
                         parentZone->notifyMouseLeaveGraph(this);
                     }
                 }
                 else {
                     qCWarning(LOG_VisualizationGraphWidget()) << "onMouseMove: No parent zone widget";
                 }
             }
             void VisualizationGraphWidget::onMouseDoubleClick(QMouseEvent *event) noexcept
             {
                 impl->m_RenderingDelegate->onMouseDoubleClick(event);
             }
             void VisualizationGraphWidget::onMouseMove(QMouseEvent *event) noexcept
             {
                 // Handles plot rendering when mouse is moving
                 impl->m_RenderingDelegate->onMouseMove(event);
                 auto axisPos = impl->posToAxisPos(event->pos(), plot());
                 // Zoom box and zone drawing
                 if (impl->m_DrawingZoomRect) {
                     impl->m_DrawingZoomRect->bottomRight->setCoords(axisPos);
                 }
                 else if (impl->m_DrawingZone) {
                     impl->m_DrawingZone->setEnd(axisPos.x());
                 }
                 // Cursor
                 if (auto parentZone = parentZoneWidget()) {
                     if (impl->pointIsInAxisRect(axisPos, plot())) {
                         parentZone->notifyMouseMoveInGraph(event->pos(), axisPos, this);
                     }
                     else {
                         parentZone->notifyMouseLeaveGraph(this);
                     }
                 }
                 else {
                     qCWarning(LOG_VisualizationGraphWidget()) << "onMouseMove: No parent zone widget";
                 }
                 // Search for the selection zone under the mouse
                 auto selectionZoneItemUnderCursor = impl->selectionZoneAt(event->pos(), plot());
                 if (selectionZoneItemUnderCursor && !impl->m_DrawingZone
                     && sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::SelectionZones) {
                     // Sets the appropriate cursor shape
                     auto cursorShape = selectionZoneItemUnderCursor->curshorShapeForPosition(event->pos());
                     setCursor(cursorShape);
                     // Manages the hovered zone
                     if (selectionZoneItemUnderCursor != impl->m_HoveredZone) {
                         if (impl->m_HoveredZone) {
                             impl->m_HoveredZone->setHovered(false);
                         }
                         selectionZoneItemUnderCursor->setHovered(true);
                         impl->m_HoveredZone = selectionZoneItemUnderCursor;
                         plot().replot(QCustomPlot::rpQueuedReplot);
                     }
                 }
                 else {
                     // There is no zone under the mouse or the interaction mode is not "selection zones"
                     if (impl->m_HoveredZone) {
                         impl->m_HoveredZone->setHovered(false);
                         impl->m_HoveredZone = nullptr;
                     }
                     setCursor(Qt::ArrowCursor);
                 }
                 impl->m_HasMovedMouse = true;
                 VisualizationDragWidget::mouseMoveEvent(event);
             }
             void VisualizationGraphWidget::onMouseWheel(QWheelEvent *event) noexcept
             {
                 auto value = event->angleDelta().x() + event->angleDelta().y();
                 if (value != 0) {
                     auto direction = value > 0 ? 1.0 : -1.0;
                     auto isZoomX = event->modifiers().testFlag(HORIZONTAL_ZOOM_MODIFIER);
                     auto isZoomY = event->modifiers().testFlag(VERTICAL_ZOOM_MODIFIER);
                     impl->m_IsCalibration = event->modifiers().testFlag(VERTICAL_PAN_MODIFIER);
                     auto zoomOrientations = QFlags<Qt::Orientation>{};
                     zoomOrientations.setFlag(Qt::Horizontal, isZoomX);
                     zoomOrientations.setFlag(Qt::Vertical, isZoomY);
                     ui->widget->axisRect()->setRangeZoom(zoomOrientations);
                     if (!isZoomX && !isZoomY) {
                         auto axis = plot().axisRect()->axis(QCPAxis::atBottom);
                         auto diff = direction * (axis->range().size() * (PAN_SPEED / 100.0));
                         axis->setRange(axis->range() + diff);
                         if (plot().noAntialiasingOnDrag()) {
                             plot().setNotAntialiasedElements(QCP::aeAll);
                         }
                         plot().replot(QCustomPlot::rpQueuedReplot);
                     }
                 }
             }
             void VisualizationGraphWidget::onMousePress(QMouseEvent *event) noexcept
             {
                 auto isDragDropClick = event->modifiers().testFlag(DRAG_DROP_MODIFIER);
                 auto isSelectionZoneMode
                     = sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::SelectionZones;
                 auto isLeftClick = event->buttons().testFlag(Qt::LeftButton);
                 if (!isDragDropClick && isLeftClick) {
                     if (sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::ZoomBox) {
                         // Starts a zoom box
                         impl->startDrawingRect(event->pos(), plot());
                     }
                     else if (isSelectionZoneMode && impl->m_DrawingZone == nullptr) {
                         // Starts a new selection zone
                         auto zoneAtPos = impl->selectionZoneAt(event->pos(), plot());
                         if (!zoneAtPos) {
                             impl->startDrawingZone(event->pos(), this);
                         }
                     }
                 }
                 // Allows mouse panning only in default mode
                 plot().setInteraction(QCP::iRangeDrag, sqpApp->plotsInteractionMode()
                                                                == SqpApplication::PlotsInteractionMode::None
                                                            && !isDragDropClick);
                 // Allows zone edition only in selection zone mode without drag&drop
                 impl->setSelectionZonesEditionEnabled(isSelectionZoneMode && !isDragDropClick);
                 // Selection / Deselection
                 if (isSelectionZoneMode) {
                     auto isMultiSelectionClick = event->modifiers().testFlag(MULTI_ZONE_SELECTION_MODIFIER);
                     auto selectionZoneItemUnderCursor = impl->selectionZoneAt(event->pos(), plot());
                     if (selectionZoneItemUnderCursor && isLeftClick) {
                         selectionZoneItemUnderCursor->setAssociatedEditedZones(
                             parentVisualizationWidget()->selectionZoneManager().selectedItems());
                     }
                     else if (!isMultiSelectionClick && isLeftClick) {
                         parentVisualizationWidget()->selectionZoneManager().clearSelection();
                     }
                     else {
                         // No selection change
                     }
                 }
                 impl->m_HasMovedMouse = false;
                 VisualizationDragWidget::mousePressEvent(event);
             }
             void VisualizationGraphWidget::onMouseRelease(QMouseEvent *event) noexcept
             {
                 if (impl->m_DrawingZoomRect) {
                     auto axisX = plot().axisRect()->axis(QCPAxis::atBottom);
                     auto axisY = plot().axisRect()->axis(QCPAxis::atLeft);
                     auto newAxisXRange = QCPRange{impl->m_DrawingZoomRect->topLeft->coords().x(),
                                                   impl->m_DrawingZoomRect->bottomRight->coords().x()};
                     auto newAxisYRange = QCPRange{impl->m_DrawingZoomRect->topLeft->coords().y(),
                                                   impl->m_DrawingZoomRect->bottomRight->coords().y()};
                     impl->removeDrawingRect(plot());
                     if (newAxisXRange.size() > axisX->range().size() * (ZOOM_BOX_MIN_SIZE / 100.0)
                         && newAxisYRange.size() > axisY->range().size() * (ZOOM_BOX_MIN_SIZE / 100.0)) {
                         impl->m_ZoomStack.push(qMakePair(axisX->range(), axisY->range()));
                         axisX->setRange(newAxisXRange);
                         axisY->setRange(newAxisYRange);
                         plot().replot(QCustomPlot::rpQueuedReplot);
                     }
                 }
                 impl->endDrawingZone(this);
                 impl->m_IsCalibration = false;
                 // Selection / Deselection
                 auto isSelectionZoneMode
                     = sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::SelectionZones;
                 if (isSelectionZoneMode) {
                     auto isMultiSelectionClick = event->modifiers().testFlag(MULTI_ZONE_SELECTION_MODIFIER);
                     auto selectionZoneItemUnderCursor = impl->selectionZoneAt(event->pos(), plot());
                     if (selectionZoneItemUnderCursor && event->button() == Qt::LeftButton) {
                         if (!isMultiSelectionClick && !impl->m_HasMovedMouse) {
                             parentVisualizationWidget()->selectionZoneManager().select(
                                 {selectionZoneItemUnderCursor});
                         }
                         else if (!impl->m_HasMovedMouse) {
                             parentVisualizationWidget()->selectionZoneManager().setSelected(
                                 selectionZoneItemUnderCursor, !selectionZoneItemUnderCursor->selected()
                                                                   || event->button() == Qt::RightButton);
                         }
                     }
                     else {
                         // No selection change
                     }
                 }
             }
             void VisualizationGraphWidget::onDataCacheVariableUpdated()
             {
                 auto graphRange = ui->widget->xAxis->range();
                 auto dateTime = SqpRange{graphRange.lower, graphRange.upper};
                 for (auto &variableEntry : impl->m_VariableToPlotMultiMap) {
                     auto variable = variableEntry.first;
                     qCDebug(LOG_VisualizationGraphWidget())
                         << "TORM: VisualizationGraphWidget::onDataCacheVariableUpdated S" << variable->range();
                     qCDebug(LOG_VisualizationGraphWidget())
                         << "TORM: VisualizationGraphWidget::onDataCacheVariableUpdated E" << dateTime;
                     if (dateTime.contains(variable->range()) || dateTime.intersect(variable->range())) {
                         impl->updateData(variableEntry.second, variable->dataSeries(), variable->range());
                     }
                 }
             }
             void VisualizationGraphWidget::onUpdateVarDisplaying(std::shared_ptr<Variable> variable,
                                                                  const SqpRange &range)
             {
                 auto it = impl->m_VariableToPlotMultiMap.find(variable);
                 if (it != impl->m_VariableToPlotMultiMap.end()) {
                     impl->updateData(it->second, variable->dataSeries(), range);
                 }
             }

gui/src/Visualization/VisualizationTabWidget.cpp +7 -7

             #include "Visualization/VisualizationTabWidget.h"
             #include "Visualization/IVisualizationWidgetVisitor.h"
             #include "ui_VisualizationTabWidget.h"
             #include "Visualization/VisualizationGraphWidget.h"
             #include "Visualization/VisualizationZoneWidget.h"
             #include "Visualization/MacScrollBarStyle.h"
             #include "Variable/VariableController.h"
             #include "Common/MimeTypesDef.h"
-            #include "DragAndDrop/DragDropHelper.h"
+            #include "DragAndDrop/DragDropGuiController.h"
             #include "SqpApplication.h"
             Q_LOGGING_CATEGORY(LOG_VisualizationTabWidget, "VisualizationTabWidget")
             namespace {
             /// Generates a default name for a new zone, according to the number of zones already displayed in
             /// the tab
             QString defaultZoneName(const QLayout &layout)
             {
                 auto count = 0;
                 for (auto i = 0; i < layout.count(); ++i) {
                     if (dynamic_cast<VisualizationZoneWidget *>(layout.itemAt(i)->widget())) {
                         count++;
                     }
                 }
                 return QObject::tr("Zone %1").arg(count + 1);
             }
             /**
              * Applies a function to all zones of the tab represented by its layout
              * @param layout the layout that contains zones
              * @param fun the function to apply to each zone
              */
             template <typename Fun>
             void processZones(QLayout &layout, Fun fun)
             {
                 for (auto i = 0; i < layout.count(); ++i) {
                     if (auto item = layout.itemAt(i)) {
                         if (auto visualizationZoneWidget
                             = dynamic_cast<VisualizationZoneWidget *>(item->widget())) {
                             fun(*visualizationZoneWidget);
                         }
                     }
                 }
             }
             } // namespace
             struct VisualizationTabWidget::VisualizationTabWidgetPrivate {
                 explicit VisualizationTabWidgetPrivate(const QString &name) : m_Name{name} {}
                 QString m_Name;
             #ifdef Q_OS_MAC
                 std::unique_ptr<MacScrollBarStyle> m_MacScrollBarStyle = std::make_unique<MacScrollBarStyle>();
             #endif
                 void dropGraph(int index, VisualizationTabWidget *tabWidget);
                 void dropZone(int index, VisualizationTabWidget *tabWidget);
                 void dropVariables(const QList<std::shared_ptr<Variable> > &variables, int index,
                                    VisualizationTabWidget *tabWidget);
             };
             VisualizationTabWidget::VisualizationTabWidget(const QString &name, QWidget *parent)
                     : QWidget{parent},
                       ui{new Ui::VisualizationTabWidget},
                       impl{spimpl::make_unique_impl<VisualizationTabWidgetPrivate>(name)}
             {
                 ui->setupUi(this);
             #ifdef Q_OS_MAC
                 impl->m_MacScrollBarStyle->selfInstallOn(ui->scrollArea, true);
             #endif
-                ui->dragDropContainer->setPlaceHolderType(DragDropHelper::PlaceHolderType::Zone, "Zone");
+                ui->dragDropContainer->setPlaceHolderType(DragDropGuiController::PlaceHolderType::Zone, "Zone");
                 ui->dragDropContainer->layout()->setContentsMargins(0, 0, 0, 12);
                 ui->dragDropContainer->layout()->setSpacing(0);
                 ui->dragDropContainer->setMimeType(MIME_TYPE_GRAPH,
                                                    VisualizationDragDropContainer::DropBehavior::Inserted);
                 ui->dragDropContainer->setMimeType(MIME_TYPE_ZONE,
                                                    VisualizationDragDropContainer::DropBehavior::Inserted);
                 ui->dragDropContainer->setMimeType(MIME_TYPE_VARIABLE_LIST,
                                                    VisualizationDragDropContainer::DropBehavior::Inserted);
                 ui->dragDropContainer->setAcceptMimeDataFunction([this](auto mimeData) {
-                    return sqpApp->dragDropHelper().checkMimeDataForVisualization(mimeData,
+                    return sqpApp->dragDropGuiController().checkMimeDataForVisualization(mimeData,
                                                                                          ui->dragDropContainer);
                 });
                 connect(ui->dragDropContainer, &VisualizationDragDropContainer::dropOccuredInContainer, this,
                         &VisualizationTabWidget::dropMimeData);
-                sqpApp->dragDropHelper().addDragDropScrollArea(ui->scrollArea);
+                sqpApp->dragDropGuiController().addDragDropScrollArea(ui->scrollArea);
                 // Widget is deleted when closed
                 setAttribute(Qt::WA_DeleteOnClose);
             }
             VisualizationTabWidget::~VisualizationTabWidget()
             {
-                sqpApp->dragDropHelper().removeDragDropScrollArea(ui->scrollArea);
+                sqpApp->dragDropGuiController().removeDragDropScrollArea(ui->scrollArea);
                 delete ui;
             }
             void VisualizationTabWidget::addZone(VisualizationZoneWidget *zoneWidget)
             {
                 ui->dragDropContainer->addDragWidget(zoneWidget);
             }
             void VisualizationTabWidget::insertZone(int index, VisualizationZoneWidget *zoneWidget)
             {
                 ui->dragDropContainer->insertDragWidget(index, zoneWidget);
             }
             VisualizationZoneWidget *VisualizationTabWidget::createZone(std::shared_ptr<Variable> variable)
             {
                 return createZone({variable}, -1);
             }
             VisualizationZoneWidget *
             VisualizationTabWidget::createZone(const QList<std::shared_ptr<Variable> > &variables, int index)
             {
                 auto zoneWidget = createEmptyZone(index);
                 // Creates a new graph into the zone
                 zoneWidget->createGraph(variables, index);
                 return zoneWidget;
             }
             VisualizationZoneWidget *VisualizationTabWidget::createEmptyZone(int index)
             {
                 auto zoneWidget
                     = new VisualizationZoneWidget{defaultZoneName(*ui->dragDropContainer->layout()), this};
                 this->insertZone(index, zoneWidget);
                 return zoneWidget;
             }
             void VisualizationTabWidget::accept(IVisualizationWidgetVisitor *visitor)
             {
                 if (visitor) {
                     visitor->visitEnter(this);
                     // Apply visitor to zone children: widgets different from zones are not visited (no action)
                     processZones(tabLayout(), [visitor](VisualizationZoneWidget &zoneWidget) {
                         zoneWidget.accept(visitor);
                     });
                     visitor->visitLeave(this);
                 }
                 else {
                     qCCritical(LOG_VisualizationTabWidget()) << tr("Can't visit widget : the visitor is null");
                 }
             }
             bool VisualizationTabWidget::canDrop(const Variable &variable) const
             {
                 // A tab can always accomodate a variable
                 Q_UNUSED(variable);
                 return true;
             }
             bool VisualizationTabWidget::contains(const Variable &variable) const
             {
                 Q_UNUSED(variable);
                 return false;
             }
             QString VisualizationTabWidget::name() const
             {
                 return impl->m_Name;
             }
             void VisualizationTabWidget::closeEvent(QCloseEvent *event)
             {
                 // Closes zones in the tab
                 processZones(tabLayout(), [](VisualizationZoneWidget &zoneWidget) { zoneWidget.close(); });
                 QWidget::closeEvent(event);
             }
             QLayout &VisualizationTabWidget::tabLayout() const noexcept
             {
                 return *ui->dragDropContainer->layout();
             }
             void VisualizationTabWidget::dropMimeData(int index, const QMimeData *mimeData)
             {
                 if (mimeData->hasFormat(MIME_TYPE_GRAPH)) {
                     impl->dropGraph(index, this);
                 }
                 else if (mimeData->hasFormat(MIME_TYPE_ZONE)) {
                     impl->dropZone(index, this);
                 }
                 else if (mimeData->hasFormat(MIME_TYPE_VARIABLE_LIST)) {
                     auto variables = sqpApp->variableController().variablesForMimeData(
                         mimeData->data(MIME_TYPE_VARIABLE_LIST));
                     impl->dropVariables(variables, index, this);
                 }
                 else {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationTabWidget::dropMimeData, unknown MIME data received.");
                 }
             }
             void VisualizationTabWidget::VisualizationTabWidgetPrivate::dropGraph(
                 int index, VisualizationTabWidget *tabWidget)
             {
-                auto &helper = sqpApp->dragDropHelper();
+                auto &helper = sqpApp->dragDropGuiController();
                 auto graphWidget = qobject_cast<VisualizationGraphWidget *>(helper.getCurrentDragWidget());
                 if (!graphWidget) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationTabWidget::dropGraph, drop aborted, the dropped graph is not "
                               "found or invalid.");
                     Q_ASSERT(false);
                     return;
                 }
                 auto parentDragDropContainer
                     = qobject_cast<VisualizationDragDropContainer *>(graphWidget->parentWidget());
                 if (!parentDragDropContainer) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationTabWidget::dropGraph, drop aborted, the parent container of "
                               "the dropped graph is not found.");
                     Q_ASSERT(false);
                     return;
                 }
                 auto nbGraph = parentDragDropContainer->countDragWidget();
                 const auto &variables = graphWidget->variables();
                 if (!variables.isEmpty()) {
                     // Abort the requests for the variables (if any)
                     // Commented, because it's not sure if it's needed or not
                     // for (const auto& var : variables)
                     //{
                     //    sqpApp->variableController().onAbortProgressRequested(var);
                     //}
                     if (nbGraph == 1) {
                         // This is the only graph in the previous zone, close the zone
                         helper.delayedCloseWidget(graphWidget->parentZoneWidget());
                     }
                     else {
                         // Close the graph
                         helper.delayedCloseWidget(graphWidget);
                     }
                     auto zoneWidget = tabWidget->createZone(variables, index);
                     auto firstGraph = zoneWidget->firstGraph();
                     if (firstGraph) {
                         firstGraph->addSelectionZones(graphWidget->selectionZoneRanges());
                     }
                     else {
                         qCWarning(LOG_VisualizationZoneWidget())
                             << tr("VisualizationTabWidget::dropGraph, no graph added in the widget.");
                         Q_ASSERT(false);
                     }
                 }
                 else {
                     // The graph is empty, create an empty zone and move the graph inside
                     auto parentZoneWidget = graphWidget->parentZoneWidget();
                     parentDragDropContainer->layout()->removeWidget(graphWidget);
                     auto zoneWidget = tabWidget->createEmptyZone(index);
                     zoneWidget->addGraph(graphWidget);
                     // Close the old zone if it was the only graph inside
                     if (nbGraph == 1) {
                         helper.delayedCloseWidget(parentZoneWidget);
                     }
                 }
             }
             void VisualizationTabWidget::VisualizationTabWidgetPrivate::dropZone(
                 int index, VisualizationTabWidget *tabWidget)
             {
-                auto &helper = sqpApp->dragDropHelper();
+                auto &helper = sqpApp->dragDropGuiController();
                 auto zoneWidget = qobject_cast<VisualizationZoneWidget *>(helper.getCurrentDragWidget());
                 if (!zoneWidget) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationTabWidget::dropZone, drop aborted, the dropped zone is not "
                               "found or invalid.");
                     Q_ASSERT(false);
                     return;
                 }
                 auto parentDragDropContainer
                     = qobject_cast<VisualizationDragDropContainer *>(zoneWidget->parentWidget());
                 if (!parentDragDropContainer) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationTabWidget::dropZone, drop aborted, the parent container of "
                               "the dropped zone is not found.");
                     Q_ASSERT(false);
                     return;
                 }
                 // Simple move of the zone, no variable operation associated
                 parentDragDropContainer->layout()->removeWidget(zoneWidget);
                 tabWidget->ui->dragDropContainer->insertDragWidget(index, zoneWidget);
             }
             void VisualizationTabWidget::VisualizationTabWidgetPrivate::dropVariables(
                 const QList<std::shared_ptr<Variable> > &variables, int index,
                 VisualizationTabWidget *tabWidget)
             {
                 // Note: the AcceptMimeDataFunction (set on the drop container) ensure there is a single and
                 // compatible variable here
                 if (variables.count() > 1) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationTabWidget::dropVariables, dropping multiple variables, operation "
                               "aborted.");
                     return;
                 }
                 tabWidget->createZone(variables, index);
             }

gui/src/Visualization/VisualizationWidget.cpp +3 -3

             #include "Visualization/VisualizationWidget.h"
             #include "Visualization/IVisualizationWidgetVisitor.h"
             #include "Visualization/VisualizationGraphWidget.h"
             #include "Visualization/VisualizationSelectionZoneManager.h"
             #include "Visualization/VisualizationTabWidget.h"
             #include "Visualization/VisualizationZoneWidget.h"
             #include "Visualization/operations/FindVariableOperation.h"
             #include "Visualization/operations/GenerateVariableMenuOperation.h"
             #include "Visualization/operations/RemoveVariableOperation.h"
             #include "Visualization/operations/RescaleAxeOperation.h"
             #include "Visualization/qcustomplot.h"
             #include "ui_VisualizationWidget.h"
-            #include "DragAndDrop/DragDropHelper.h"
+            #include "DragAndDrop/DragDropGuiController.h"
             #include "SqpApplication.h"
             #include <QToolButton>
             #include <memory>
             Q_LOGGING_CATEGORY(LOG_VisualizationWidget, "VisualizationWidget")
             struct VisualizationWidget::VisualizationWidgetPrivate {
                 std::unique_ptr<VisualizationSelectionZoneManager> m_ZoneSelectionManager = nullptr;
                 VisualizationWidgetPrivate()
                         : m_ZoneSelectionManager(std::make_unique<VisualizationSelectionZoneManager>())
                 {
                 }
             };
             VisualizationWidget::VisualizationWidget(QWidget *parent)
                     : QWidget{parent},
                       ui{new Ui::VisualizationWidget},
                       impl{spimpl::make_unique_impl<VisualizationWidgetPrivate>()}
             {
                 ui->setupUi(this);
                 auto addTabViewButton = new QToolButton{ui->tabWidget};
                 addTabViewButton->setText(tr("Add View"));
                 addTabViewButton->setCursor(Qt::ArrowCursor);
                 ui->tabWidget->setCornerWidget(addTabViewButton, Qt::TopRightCorner);
                 auto enableMinimumCornerWidgetSize = [this](bool enable) {
                     auto tabViewCornerWidget = ui->tabWidget->cornerWidget();
                     auto width = enable ? tabViewCornerWidget->width() : 0;
                     auto height = enable ? tabViewCornerWidget->height() : 0;
                     tabViewCornerWidget->setMinimumHeight(height);
                     tabViewCornerWidget->setMinimumWidth(width);
                     ui->tabWidget->setMinimumHeight(height);
                     ui->tabWidget->setMinimumWidth(width);
                 };
                 auto addTabView = [this, enableMinimumCornerWidgetSize]() {
                     auto widget = new VisualizationTabWidget{QString{"View %1"}.arg(ui->tabWidget->count() + 1),
                                                              ui->tabWidget};
                     auto index = ui->tabWidget->addTab(widget, widget->name());
                     if (ui->tabWidget->count() > 0) {
                         enableMinimumCornerWidgetSize(false);
                     }
                     qCInfo(LOG_VisualizationWidget()) << tr("add the tab of index %1").arg(index);
                 };
                 auto removeTabView = [this, enableMinimumCornerWidgetSize](int index) {
                     if (ui->tabWidget->count() == 1) {
                         enableMinimumCornerWidgetSize(true);
                     }
                     // Removes widget from tab and closes it
                     auto widget = ui->tabWidget->widget(index);
                     ui->tabWidget->removeTab(index);
                     if (widget) {
                         widget->close();
                     }
                     qCInfo(LOG_VisualizationWidget()) << tr("remove the tab of index %1").arg(index);
                 };
                 ui->tabWidget->setTabsClosable(true);
                 connect(addTabViewButton, &QToolButton::clicked, addTabView);
                 connect(ui->tabWidget, &QTabWidget::tabCloseRequested, removeTabView);
-                sqpApp->dragDropHelper().addDragDropTabBar(ui->tabWidget->tabBar());
+                sqpApp->dragDropGuiController().addDragDropTabBar(ui->tabWidget->tabBar());
                 // Adds default tab
                 addTabView();
             }
             VisualizationWidget::~VisualizationWidget()
             {
-                sqpApp->dragDropHelper().removeDragDropTabBar(ui->tabWidget->tabBar());
+                sqpApp->dragDropGuiController().removeDragDropTabBar(ui->tabWidget->tabBar());
                 delete ui;
             }
             VisualizationSelectionZoneManager &VisualizationWidget::selectionZoneManager() const
             {
                 return *impl->m_ZoneSelectionManager.get();
             }
             void VisualizationWidget::accept(IVisualizationWidgetVisitor *visitor)
             {
                 if (visitor) {
                     visitor->visitEnter(this);
                     // Apply visitor for tab children
                     for (auto i = 0; i < ui->tabWidget->count(); ++i) {
                         // Widgets different from tabs are not visited (no action)
                         if (auto visualizationTabWidget
                             = dynamic_cast<VisualizationTabWidget *>(ui->tabWidget->widget(i))) {
                             visualizationTabWidget->accept(visitor);
                         }
                     }
                     visitor->visitLeave(this);
                 }
                 else {
                     qCCritical(LOG_VisualizationWidget()) << tr("Can't visit widget : the visitor is null");
                 }
             }
             bool VisualizationWidget::canDrop(const Variable &variable) const
             {
                 // The main widget can never accomodate a variable
                 Q_UNUSED(variable);
                 return false;
             }
             bool VisualizationWidget::contains(const Variable &variable) const
             {
                 Q_UNUSED(variable);
                 return false;
             }
             QString VisualizationWidget::name() const
             {
                 return QStringLiteral("MainView");
             }
             void VisualizationWidget::attachVariableMenu(
                 QMenu *menu, const QVector<std::shared_ptr<Variable> > &variables) noexcept
             {
                 // Menu is generated only if there is a single variable
                 if (variables.size() == 1) {
                     if (auto variable = variables.first()) {
                         // Gets the containers of the variable
                         FindVariableOperation findVariableOperation{variable};
                         accept(&findVariableOperation);
                         auto variableContainers = findVariableOperation.result();
                         // Generates the actions that make it possible to visualize the variable
                         GenerateVariableMenuOperation generateVariableMenuOperation{
                             menu, variable, std::move(variableContainers)};
                         accept(&generateVariableMenuOperation);
                     }
                     else {
                         qCCritical(LOG_VisualizationWidget()) << tr(
                             "Can't generate the menu relative to the visualization: the variable is null");
                     }
                 }
                 else {
                     qCDebug(LOG_VisualizationWidget())
                         << tr("No generation of the menu related to the visualization: several variables are "
                               "selected");
                 }
             }
             void VisualizationWidget::onVariableAboutToBeDeleted(std::shared_ptr<Variable> variable) noexcept
             {
                 // Calls the operation of removing all references to the variable in the visualization
                 auto removeVariableOperation = RemoveVariableOperation{variable};
                 accept(&removeVariableOperation);
             }
             void VisualizationWidget::onRangeChanged(std::shared_ptr<Variable> variable,
                                                      const SqpRange &range) noexcept
             {
                 // Calls the operation of rescaling all graph that contrains variable in the visualization
                 auto rescaleVariableOperation = RescaleAxeOperation{variable, range};
                 accept(&rescaleVariableOperation);
             }
             void VisualizationWidget::closeEvent(QCloseEvent *event)
             {
                 // Closes tabs in the widget
                 for (auto i = 0; i < ui->tabWidget->count(); ++i) {
                     if (auto visualizationTabWidget
                         = dynamic_cast<VisualizationTabWidget *>(ui->tabWidget->widget(i))) {
                         visualizationTabWidget->close();
                     }
                 }
                 QWidget::closeEvent(event);
             }

gui/src/Visualization/VisualizationZoneWidget.cpp +4 -4

             #include "Visualization/VisualizationZoneWidget.h"
             #include "Visualization/IVisualizationWidgetVisitor.h"
             #include "Visualization/QCustomPlotSynchronizer.h"
             #include "Visualization/VisualizationGraphWidget.h"
             #include "Visualization/VisualizationWidget.h"
             #include "ui_VisualizationZoneWidget.h"
             #include "Common/MimeTypesDef.h"
             #include "Common/VisualizationDef.h"
             #include <Data/SqpRange.h>
             #include <Time/TimeController.h>
             #include <Variable/Variable.h>
             #include <Variable/VariableController.h>
             #include <Visualization/operations/FindVariableOperation.h>
-            #include <DragAndDrop/DragDropHelper.h>
+            #include <DragAndDrop/DragDropGuiController.h>
             #include <QUuid>
             #include <SqpApplication.h>
             #include <cmath>
             #include <QLayout>
             Q_LOGGING_CATEGORY(LOG_VisualizationZoneWidget, "VisualizationZoneWidget")
             namespace {
             /// Generates a default name for a new graph, according to the number of graphs already displayed in
             /// the zone
             QString defaultGraphName(const QLayout &layout)
             {
                 auto count = 0;
                 for (auto i = 0; i < layout.count(); ++i) {
                     if (dynamic_cast<VisualizationGraphWidget *>(layout.itemAt(i)->widget())) {
                         count++;
                     }
                 }
                 return QObject::tr("Graph %1").arg(count + 1);
             }
             /**
              * Applies a function to all graphs of the zone represented by its layout
              * @param layout the layout that contains graphs
              * @param fun the function to apply to each graph
              */
             template <typename Fun>
             void processGraphs(QLayout &layout, Fun fun)
             {
                 for (auto i = 0; i < layout.count(); ++i) {
                     if (auto item = layout.itemAt(i)) {
                         if (auto visualizationGraphWidget
                             = qobject_cast<VisualizationGraphWidget *>(item->widget())) {
                             fun(*visualizationGraphWidget);
                         }
                     }
                 }
             }
             } // namespace
             struct VisualizationZoneWidget::VisualizationZoneWidgetPrivate {
                 explicit VisualizationZoneWidgetPrivate()
                         : m_SynchronisationGroupId{QUuid::createUuid()},
                           m_Synchronizer{std::make_unique<QCustomPlotSynchronizer>()}
                 {
                 }
                 QUuid m_SynchronisationGroupId;
                 std::unique_ptr<IGraphSynchronizer> m_Synchronizer;
                 void dropGraph(int index, VisualizationZoneWidget *zoneWidget);
                 void dropVariables(const QList<std::shared_ptr<Variable> > &variables, int index,
                                    VisualizationZoneWidget *zoneWidget);
             };
             VisualizationZoneWidget::VisualizationZoneWidget(const QString &name, QWidget *parent)
                     : VisualizationDragWidget{parent},
                       ui{new Ui::VisualizationZoneWidget},
                       impl{spimpl::make_unique_impl<VisualizationZoneWidgetPrivate>()}
             {
                 ui->setupUi(this);
                 ui->zoneNameLabel->setText(name);
-                ui->dragDropContainer->setPlaceHolderType(DragDropHelper::PlaceHolderType::Graph);
+                ui->dragDropContainer->setPlaceHolderType(DragDropGuiController::PlaceHolderType::Graph);
                 ui->dragDropContainer->setMimeType(MIME_TYPE_GRAPH,
                                                    VisualizationDragDropContainer::DropBehavior::Inserted);
                 ui->dragDropContainer->setMimeType(
                     MIME_TYPE_VARIABLE_LIST, VisualizationDragDropContainer::DropBehavior::InsertedAndMerged);
                 ui->dragDropContainer->setMimeType(MIME_TYPE_TIME_RANGE,
                                                    VisualizationDragDropContainer::DropBehavior::Merged);
                 ui->dragDropContainer->setMimeType(MIME_TYPE_ZONE,
                                                    VisualizationDragDropContainer::DropBehavior::Forbidden);
                 ui->dragDropContainer->setMimeType(MIME_TYPE_SELECTION_ZONE,
                                                    VisualizationDragDropContainer::DropBehavior::Forbidden);
                 ui->dragDropContainer->setAcceptMimeDataFunction([this](auto mimeData) {
-                    return sqpApp->dragDropHelper().checkMimeDataForVisualization(mimeData,
+                    return sqpApp->dragDropGuiController().checkMimeDataForVisualization(mimeData,
                                                                                          ui->dragDropContainer);
                 });
                 auto acceptDragWidgetFun = [](auto dragWidget, auto mimeData) {
                     if (!mimeData) {
                         return false;
                     }
                     if (mimeData->hasFormat(MIME_TYPE_VARIABLE_LIST)) {
                         auto variables = sqpApp->variableController().variablesForMimeData(
                             mimeData->data(MIME_TYPE_VARIABLE_LIST));
                         if (variables.count() != 1) {
                             return false;
                         }
                         auto variable = variables.first();
                         if (auto graphWidget = dynamic_cast<const VisualizationGraphWidget *>(dragWidget)) {
                             return graphWidget->canDrop(*variable);
                         }
                     }
                     return true;
                 };
                 ui->dragDropContainer->setAcceptDragWidgetFunction(acceptDragWidgetFun);
                 connect(ui->dragDropContainer, &VisualizationDragDropContainer::dropOccuredInContainer, this,
                         &VisualizationZoneWidget::dropMimeData);
                 connect(ui->dragDropContainer, &VisualizationDragDropContainer::dropOccuredOnWidget, this,
                         &VisualizationZoneWidget::dropMimeDataOnGraph);
                 // 'Close' options : widget is deleted when closed
                 setAttribute(Qt::WA_DeleteOnClose);
                 connect(ui->closeButton, &QToolButton::clicked, this, &VisualizationZoneWidget::close);
                 ui->closeButton->setIcon(sqpApp->style()->standardIcon(QStyle::SP_TitleBarCloseButton));
                 // Synchronisation id
                 QMetaObject::invokeMethod(&sqpApp->variableController(), "onAddSynchronizationGroupId",
                                           Qt::QueuedConnection, Q_ARG(QUuid, impl->m_SynchronisationGroupId));
             }
             VisualizationZoneWidget::~VisualizationZoneWidget()
             {
                 delete ui;
             }
             void VisualizationZoneWidget::addGraph(VisualizationGraphWidget *graphWidget)
             {
                 // Synchronize new graph with others in the zone
                 impl->m_Synchronizer->addGraph(*graphWidget);
                 ui->dragDropContainer->addDragWidget(graphWidget);
             }
             void VisualizationZoneWidget::insertGraph(int index, VisualizationGraphWidget *graphWidget)
             {
                 // Synchronize new graph with others in the zone
                 impl->m_Synchronizer->addGraph(*graphWidget);
                 ui->dragDropContainer->insertDragWidget(index, graphWidget);
             }
             VisualizationGraphWidget *VisualizationZoneWidget::createGraph(std::shared_ptr<Variable> variable)
             {
                 return createGraph(variable, -1);
             }
             VisualizationGraphWidget *VisualizationZoneWidget::createGraph(std::shared_ptr<Variable> variable,
                                                                            int index)
             {
                 auto graphWidget
                     = new VisualizationGraphWidget{defaultGraphName(*ui->dragDropContainer->layout()), this};
                 // Set graph properties
                 graphWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::MinimumExpanding);
                 graphWidget->setMinimumHeight(GRAPH_MINIMUM_HEIGHT);
                 // Lambda to synchronize zone widget
                 auto synchronizeZoneWidget = [this, graphWidget](const SqpRange &graphRange,
                                                                  const SqpRange &oldGraphRange) {
                     auto zoomType = VariableController::getZoomType(graphRange, oldGraphRange);
                     auto frameLayout = ui->dragDropContainer->layout();
                     for (auto i = 0; i < frameLayout->count(); ++i) {
                         auto graphChild
                             = dynamic_cast<VisualizationGraphWidget *>(frameLayout->itemAt(i)->widget());
                         if (graphChild && (graphChild != graphWidget)) {
                             auto graphChildRange = graphChild->graphRange();
                             switch (zoomType) {
                                 case AcquisitionZoomType::ZoomIn: {
                                     auto deltaLeft = graphRange.m_TStart - oldGraphRange.m_TStart;
                                     auto deltaRight = oldGraphRange.m_TEnd - graphRange.m_TEnd;
                                     graphChildRange.m_TStart += deltaLeft;
                                     graphChildRange.m_TEnd -= deltaRight;
                                     qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: ZoomIn");
                                     qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: deltaLeft")
                                                                            << deltaLeft;
                                     qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: deltaRight")
                                                                            << deltaRight;
                                     qCDebug(LOG_VisualizationZoneWidget())
                                         << tr("TORM: dt") << graphRange.m_TEnd - graphRange.m_TStart;
                                     break;
                                 }
                                 case AcquisitionZoomType::ZoomOut: {
                                     qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: ZoomOut");
                                     auto deltaLeft = oldGraphRange.m_TStart - graphRange.m_TStart;
                                     auto deltaRight = graphRange.m_TEnd - oldGraphRange.m_TEnd;
                                     qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: deltaLeft")
                                                                            << deltaLeft;
                                     qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: deltaRight")
                                                                            << deltaRight;
                                     qCDebug(LOG_VisualizationZoneWidget())
                                         << tr("TORM: dt") << graphRange.m_TEnd - graphRange.m_TStart;
                                     graphChildRange.m_TStart -= deltaLeft;
                                     graphChildRange.m_TEnd += deltaRight;
                                     break;
                                 }
                                 case AcquisitionZoomType::PanRight: {
                                     qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: PanRight");
                                     auto deltaLeft = graphRange.m_TStart - oldGraphRange.m_TStart;
                                     auto deltaRight = graphRange.m_TEnd - oldGraphRange.m_TEnd;
                                     graphChildRange.m_TStart += deltaLeft;
                                     graphChildRange.m_TEnd += deltaRight;
                                     qCDebug(LOG_VisualizationZoneWidget())
                                         << tr("TORM: dt") << graphRange.m_TEnd - graphRange.m_TStart;
                                     break;
                                 }
                                 case AcquisitionZoomType::PanLeft: {
                                     qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: PanLeft");
                                     auto deltaLeft = oldGraphRange.m_TStart - graphRange.m_TStart;
                                     auto deltaRight = oldGraphRange.m_TEnd - graphRange.m_TEnd;
                                     graphChildRange.m_TStart -= deltaLeft;
                                     graphChildRange.m_TEnd -= deltaRight;
                                     break;
                                 }
                                 case AcquisitionZoomType::Unknown: {
                                     qCDebug(LOG_VisualizationZoneWidget())
                                         << tr("Impossible to synchronize: zoom type unknown");
                                     break;
                                 }
                                 default:
                                     qCCritical(LOG_VisualizationZoneWidget())
                                         << tr("Impossible to synchronize: zoom type not take into account");
                                     // No action
                                     break;
                             }
                             graphChild->enableAcquisition(false);
                             qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: Range before: ")
                                                                    << graphChild->graphRange();
                             qCDebug(LOG_VisualizationZoneWidget()) << tr("TORM: Range after : ")
                                                                    << graphChildRange;
                             qCDebug(LOG_VisualizationZoneWidget())
                                 << tr("TORM: child dt") << graphChildRange.m_TEnd - graphChildRange.m_TStart;
                             graphChild->setGraphRange(graphChildRange);
                             graphChild->enableAcquisition(true);
                         }
                     }
                 };
                 // connection for synchronization
                 connect(graphWidget, &VisualizationGraphWidget::synchronize, synchronizeZoneWidget);
                 connect(graphWidget, &VisualizationGraphWidget::variableAdded, this,
                         &VisualizationZoneWidget::onVariableAdded);
                 connect(graphWidget, &VisualizationGraphWidget::variableAboutToBeRemoved, this,
                         &VisualizationZoneWidget::onVariableAboutToBeRemoved);
                 auto range = SqpRange{};
                 if (auto firstGraph = this->firstGraph()) {
                     // Case of a new graph in a existant zone
                     range = firstGraph->graphRange();
                 }
                 else {
                     // Case of a new graph as the first of the zone
                     range = variable->range();
                 }
                 this->insertGraph(index, graphWidget);
                 graphWidget->addVariable(variable, range);
                 graphWidget->setYRange(variable);
                 return graphWidget;
             }
             VisualizationGraphWidget *
             VisualizationZoneWidget::createGraph(const QList<std::shared_ptr<Variable> > variables, int index)
             {
                 if (variables.isEmpty()) {
                     return nullptr;
                 }
                 auto graphWidget = createGraph(variables.first(), index);
                 for (auto variableIt = variables.cbegin() + 1; variableIt != variables.cend(); ++variableIt) {
                     graphWidget->addVariable(*variableIt, graphWidget->graphRange());
                 }
                 return graphWidget;
             }
             VisualizationGraphWidget *VisualizationZoneWidget::firstGraph() const
             {
                 VisualizationGraphWidget *firstGraph = nullptr;
                 auto layout = ui->dragDropContainer->layout();
                 if (layout->count() > 0) {
                     if (auto visualizationGraphWidget
                         = qobject_cast<VisualizationGraphWidget *>(layout->itemAt(0)->widget())) {
                         firstGraph = visualizationGraphWidget;
                     }
                 }
                 return firstGraph;
             }
             void VisualizationZoneWidget::accept(IVisualizationWidgetVisitor *visitor)
             {
                 if (visitor) {
                     visitor->visitEnter(this);
                     // Apply visitor to graph children: widgets different from graphs are not visited (no
                     // action)
                     processGraphs(
                         *ui->dragDropContainer->layout(),
                         [visitor](VisualizationGraphWidget &graphWidget) { graphWidget.accept(visitor); });
                     visitor->visitLeave(this);
                 }
                 else {
                     qCCritical(LOG_VisualizationZoneWidget()) << tr("Can't visit widget : the visitor is null");
                 }
             }
             bool VisualizationZoneWidget::canDrop(const Variable &variable) const
             {
                 // A tab can always accomodate a variable
                 Q_UNUSED(variable);
                 return true;
             }
             bool VisualizationZoneWidget::contains(const Variable &variable) const
             {
                 Q_UNUSED(variable);
                 return false;
             }
             QString VisualizationZoneWidget::name() const
             {
                 return ui->zoneNameLabel->text();
             }
             QMimeData *VisualizationZoneWidget::mimeData(const QPoint &position) const
             {
                 Q_UNUSED(position);
                 auto mimeData = new QMimeData;
                 mimeData->setData(MIME_TYPE_ZONE, QByteArray{});
                 if (auto firstGraph = this->firstGraph()) {
                     auto timeRangeData = TimeController::mimeDataForTimeRange(firstGraph->graphRange());
                     mimeData->setData(MIME_TYPE_TIME_RANGE, timeRangeData);
                 }
                 return mimeData;
             }
             bool VisualizationZoneWidget::isDragAllowed() const
             {
                 return true;
             }
             void VisualizationZoneWidget::notifyMouseMoveInGraph(const QPointF &graphPosition,
                                                                  const QPointF &plotPosition,
                                                                  VisualizationGraphWidget *graphWidget)
             {
                 processGraphs(*ui->dragDropContainer->layout(), [&graphPosition, &plotPosition, &graphWidget](
                                                                     VisualizationGraphWidget &processedGraph) {
                     switch (sqpApp->plotsCursorMode()) {
                         case SqpApplication::PlotsCursorMode::Vertical:
                             processedGraph.removeHorizontalCursor();
                             processedGraph.addVerticalCursorAtViewportPosition(graphPosition.x());
                             break;
                         case SqpApplication::PlotsCursorMode::Temporal:
                             processedGraph.addVerticalCursor(plotPosition.x());
                             processedGraph.removeHorizontalCursor();
                             break;
                         case SqpApplication::PlotsCursorMode::Horizontal:
                             processedGraph.removeVerticalCursor();
                             if (&processedGraph == graphWidget) {
                                 processedGraph.addHorizontalCursorAtViewportPosition(graphPosition.y());
                             }
                             else {
                                 processedGraph.removeHorizontalCursor();
                             }
                             break;
                         case SqpApplication::PlotsCursorMode::Cross:
                             if (&processedGraph == graphWidget) {
                                 processedGraph.addVerticalCursorAtViewportPosition(graphPosition.x());
                                 processedGraph.addHorizontalCursorAtViewportPosition(graphPosition.y());
                             }
                             else {
                                 processedGraph.removeHorizontalCursor();
                                 processedGraph.removeVerticalCursor();
                             }
                             break;
                         case SqpApplication::PlotsCursorMode::NoCursor:
                             processedGraph.removeHorizontalCursor();
                             processedGraph.removeVerticalCursor();
                             break;
                     }
                 });
             }
             void VisualizationZoneWidget::notifyMouseLeaveGraph(VisualizationGraphWidget *graphWidget)
             {
                 processGraphs(*ui->dragDropContainer->layout(), [](VisualizationGraphWidget &processedGraph) {
                     processedGraph.removeHorizontalCursor();
                     processedGraph.removeVerticalCursor();
                 });
             }
             void VisualizationZoneWidget::closeEvent(QCloseEvent *event)
             {
                 // Closes graphs in the zone
                 processGraphs(*ui->dragDropContainer->layout(),
                               [](VisualizationGraphWidget &graphWidget) { graphWidget.close(); });
                 // Delete synchronization group from variable controller
                 QMetaObject::invokeMethod(&sqpApp->variableController(), "onRemoveSynchronizationGroupId",
                                           Qt::QueuedConnection, Q_ARG(QUuid, impl->m_SynchronisationGroupId));
                 QWidget::closeEvent(event);
             }
             void VisualizationZoneWidget::onVariableAdded(std::shared_ptr<Variable> variable)
             {
                 QMetaObject::invokeMethod(&sqpApp->variableController(), "onAddSynchronized",
                                           Qt::QueuedConnection, Q_ARG(std::shared_ptr<Variable>, variable),
                                           Q_ARG(QUuid, impl->m_SynchronisationGroupId));
             }
             void VisualizationZoneWidget::onVariableAboutToBeRemoved(std::shared_ptr<Variable> variable)
             {
                 QMetaObject::invokeMethod(&sqpApp->variableController(), "desynchronize", Qt::QueuedConnection,
                                           Q_ARG(std::shared_ptr<Variable>, variable),
                                           Q_ARG(QUuid, impl->m_SynchronisationGroupId));
             }
             void VisualizationZoneWidget::dropMimeData(int index, const QMimeData *mimeData)
             {
                 if (mimeData->hasFormat(MIME_TYPE_GRAPH)) {
                     impl->dropGraph(index, this);
                 }
                 else if (mimeData->hasFormat(MIME_TYPE_VARIABLE_LIST)) {
                     auto variables = sqpApp->variableController().variablesForMimeData(
                         mimeData->data(MIME_TYPE_VARIABLE_LIST));
                     impl->dropVariables(variables, index, this);
                 }
                 else {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationZoneWidget::dropMimeData, unknown MIME data received.");
                 }
             }
             void VisualizationZoneWidget::dropMimeDataOnGraph(VisualizationDragWidget *dragWidget,
                                                               const QMimeData *mimeData)
             {
                 auto graphWidget = qobject_cast<VisualizationGraphWidget *>(dragWidget);
                 if (!graphWidget) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationZoneWidget::dropMimeDataOnGraph, dropping in an unknown widget, "
                               "drop aborted");
                     Q_ASSERT(false);
                     return;
                 }
                 if (mimeData->hasFormat(MIME_TYPE_VARIABLE_LIST)) {
                     auto variables = sqpApp->variableController().variablesForMimeData(
                         mimeData->data(MIME_TYPE_VARIABLE_LIST));
                     for (const auto &var : variables) {
                         graphWidget->addVariable(var, graphWidget->graphRange());
                     }
                 }
                 else if (mimeData->hasFormat(MIME_TYPE_TIME_RANGE)) {
                     auto range = TimeController::timeRangeForMimeData(mimeData->data(MIME_TYPE_TIME_RANGE));
                     graphWidget->setGraphRange(range);
                 }
                 else {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationZoneWidget::dropMimeDataOnGraph, unknown MIME data received.");
                 }
             }
             void VisualizationZoneWidget::VisualizationZoneWidgetPrivate::dropGraph(
                 int index, VisualizationZoneWidget *zoneWidget)
             {
-                auto &helper = sqpApp->dragDropHelper();
+                auto &helper = sqpApp->dragDropGuiController();
                 auto graphWidget = qobject_cast<VisualizationGraphWidget *>(helper.getCurrentDragWidget());
                 if (!graphWidget) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationZoneWidget::dropGraph, drop aborted, the dropped graph is not "
                               "found or invalid.");
                     Q_ASSERT(false);
                     return;
                 }
                 auto parentDragDropContainer
                     = qobject_cast<VisualizationDragDropContainer *>(graphWidget->parentWidget());
                 if (!parentDragDropContainer) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationZoneWidget::dropGraph, drop aborted, the parent container of "
                               "the dropped graph is not found.");
                     Q_ASSERT(false);
                     return;
                 }
                 const auto &variables = graphWidget->variables();
                 if (parentDragDropContainer != zoneWidget->ui->dragDropContainer && !variables.isEmpty()) {
                     // The drop didn't occur in the same zone
                     // Abort the requests for the variables (if any)
                     // Commented, because it's not sure if it's needed or not
                     // for (const auto& var : variables)
                     //{
                     //    sqpApp->variableController().onAbortProgressRequested(var);
                     //}
                     auto previousParentZoneWidget = graphWidget->parentZoneWidget();
                     auto nbGraph = parentDragDropContainer->countDragWidget();
                     if (nbGraph == 1) {
                         // This is the only graph in the previous zone, close the zone
                         helper.delayedCloseWidget(previousParentZoneWidget);
                     }
                     else {
                         // Close the graph
                         helper.delayedCloseWidget(graphWidget);
                     }
                     // Creates the new graph in the zone
                     auto newGraphWidget = zoneWidget->createGraph(variables, index);
                     newGraphWidget->addSelectionZones(graphWidget->selectionZoneRanges());
                 }
                 else {
                     // The drop occurred in the same zone or the graph is empty
                     // Simple move of the graph, no variable operation associated
                     parentDragDropContainer->layout()->removeWidget(graphWidget);
                     if (variables.isEmpty() && parentDragDropContainer != zoneWidget->ui->dragDropContainer) {
                         // The graph is empty and dropped in a different zone.
                         // Take the range of the first graph in the zone (if existing).
                         auto layout = zoneWidget->ui->dragDropContainer->layout();
                         if (layout->count() > 0) {
                             if (auto visualizationGraphWidget
                                 = qobject_cast<VisualizationGraphWidget *>(layout->itemAt(0)->widget())) {
                                 graphWidget->setGraphRange(visualizationGraphWidget->graphRange());
                             }
                         }
                     }
                     zoneWidget->ui->dragDropContainer->insertDragWidget(index, graphWidget);
                 }
             }
             void VisualizationZoneWidget::VisualizationZoneWidgetPrivate::dropVariables(
                 const QList<std::shared_ptr<Variable> > &variables, int index,
                 VisualizationZoneWidget *zoneWidget)
             {
                 // Note: the AcceptMimeDataFunction (set on the drop container) ensure there is a single and
                 // compatible variable here
                 if (variables.count() > 1) {
                     qCWarning(LOG_VisualizationZoneWidget())
                         << tr("VisualizationZoneWidget::dropVariables, dropping multiple variables, operation "
                               "aborted.");
                     return;
                 }
                 zoneWidget->createGraph(variables, index);
             }

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