HG_REPOSITORIES/LPP/SciQLOP_Repos/SciQLop Commit - r1047:d404ba4b75e5

drag of selection zones

trabillard -

r1047:d404ba4b75e5

parent child

Context file:

r1047:d404ba4b75e5

core/include/Common/MimeTypesDef.h +1 0

             #ifndef SCIQLOP_MIMETYPESDEF_H
             #define SCIQLOP_MIMETYPESDEF_H
             #include "CoreGlobal.h"
             #include <QString>
             // ////////////////// //
             // SciQlop Mime Types //
             // ////////////////// //
             extern SCIQLOP_CORE_EXPORT const QString MIME_TYPE_GRAPH;
             extern SCIQLOP_CORE_EXPORT const QString MIME_TYPE_ZONE;
             extern SCIQLOP_CORE_EXPORT const QString MIME_TYPE_VARIABLE_LIST;
             extern SCIQLOP_CORE_EXPORT const QString MIME_TYPE_PRODUCT_LIST;
             extern SCIQLOP_CORE_EXPORT const QString MIME_TYPE_TIME_RANGE;
+            extern SCIQLOP_CORE_EXPORT const QString MIME_TYPE_SELECTION_ZONE;
             #endif // SCIQLOP_MIMETYPESDEF_H

core/src/Common/MimeTypesDef.cpp +1 0

             #include "Common/MimeTypesDef.h"
             const QString MIME_TYPE_GRAPH = QStringLiteral("sciqlop/graph");
             const QString MIME_TYPE_ZONE = QStringLiteral("sciqlop/zone");
             const QString MIME_TYPE_VARIABLE_LIST = QStringLiteral("sciqlop/var-list");
             const QString MIME_TYPE_PRODUCT_LIST = QStringLiteral("sciqlop/product-list");
             const QString MIME_TYPE_TIME_RANGE = QStringLiteral("sciqlop/time-range");
+            const QString MIME_TYPE_SELECTION_ZONE = QStringLiteral("sciqlop/selection-zone");

gui/include/Visualization/VisualizationDragWidget.h +6 -2

             #ifndef SCIQLOP_VISUALIZATIONDRAGWIDGET_H
             #define SCIQLOP_VISUALIZATIONDRAGWIDGET_H
             #include <Common/spimpl.h>
             #include <QMimeData>
             #include <QWidget>
             class VisualizationDragWidget : public QWidget {
                 Q_OBJECT
             public:
                 VisualizationDragWidget(QWidget *parent = nullptr);
-                virtual QMimeData *mimeData() const = 0;
+                virtual QMimeData *mimeData(const QPoint &position) const = 0;
                 virtual bool isDragAllowed() const = 0;
-                virtual void highlightForMerge(bool highlighted) { Q_UNUSED(highlighted); };
+                virtual void highlightForMerge(bool highlighted) { Q_UNUSED(highlighted); }
+                /// Custom pixmap to display during a drag operation.
+                /// If the provided pixmap is null, a pixmap of the entire widget is used.
+                virtual QPixmap customDragPixmap(const QPoint &dragPosition);
             protected:
                 virtual void mousePressEvent(QMouseEvent *event) override;
                 virtual void mouseMoveEvent(QMouseEvent *event) override;
             private:
                 class VisualizationDragWidgetPrivate;
                 spimpl::unique_impl_ptr<VisualizationDragWidgetPrivate> impl;
             signals:
                 void dragDetected(VisualizationDragWidget *dragWidget, const QPoint &dragPosition);
             };
             #endif // SCIQLOP_VISUALIZATIONDRAGWIDGET_H

gui/include/Visualization/VisualizationGraphWidget.h +3 -2

             #ifndef SCIQLOP_VISUALIZATIONGRAPHWIDGET_H
             #define SCIQLOP_VISUALIZATIONGRAPHWIDGET_H
             #include "Visualization/IVisualizationWidget.h"
             #include "Visualization/VisualizationDragWidget.h"
             #include <QLoggingCategory>
             #include <QWidget>
             #include <memory>
             #include <Common/spimpl.h>
             Q_DECLARE_LOGGING_CATEGORY(LOG_VisualizationGraphWidget)
             class QCPRange;
             class QCustomPlot;
             class SqpRange;
             class Variable;
             class VisualizationZoneWidget;
             namespace Ui {
             class VisualizationGraphWidget;
             } // namespace Ui
             class VisualizationGraphWidget : public VisualizationDragWidget, public IVisualizationWidget {
                 Q_OBJECT
                 friend class QCustomPlotSynchronizer;
                 friend class VisualizationGraphRenderingDelegate;
             public:
                 explicit VisualizationGraphWidget(const QString &name = {}, QWidget *parent = 0);
                 virtual ~VisualizationGraphWidget();
                 VisualizationZoneWidget *parentZoneWidget() const noexcept;
                 /// If acquisition isn't enable, requestDataLoading signal cannot be emit
                 void enableAcquisition(bool enable);
                 void addVariable(std::shared_ptr<Variable> variable, SqpRange range);
                 /// Removes a variable from the graph
                 void removeVariable(std::shared_ptr<Variable> variable) noexcept;
                 /// Returns the list of all variables used in the graph
                 QList<std::shared_ptr<Variable> > variables() const;
                 /// Sets the y-axis range based on the data of a variable
                 void setYRange(std::shared_ptr<Variable> variable);
                 SqpRange graphRange() const noexcept;
                 void setGraphRange(const SqpRange &range);
                 /// Undo the last zoom  done with a zoom box
                 void undoZoom();
                 // IVisualizationWidget interface
                 void accept(IVisualizationWidgetVisitor *visitor) override;
                 bool canDrop(const Variable &variable) const override;
                 bool contains(const Variable &variable) const override;
                 QString name() const override;
                 // VisualisationDragWidget
-                QMimeData *mimeData() const override;
+                QMimeData *mimeData(const QPoint &position) const override;
+                QPixmap customDragPixmap(const QPoint &dragPosition) override;
                 bool isDragAllowed() const override;
                 void highlightForMerge(bool highlighted) override;
                 // Cursors
                 /// Adds or moves the vertical cursor at the specified value on the x-axis
                 void addVerticalCursor(double time);
                 /// Adds or moves the vertical cursor at the specified value on the x-axis
                 void addVerticalCursorAtViewportPosition(double position);
                 void removeVerticalCursor();
                 /// Adds or moves the vertical cursor at the specified value on the y-axis
                 void addHorizontalCursor(double value);
                 /// Adds or moves the vertical cursor at the specified value on the y-axis
                 void addHorizontalCursorAtViewportPosition(double position);
                 void removeHorizontalCursor();
             signals:
                 void synchronize(const SqpRange &range, const SqpRange &oldRange);
                 void requestDataLoading(QVector<std::shared_ptr<Variable> > variable, const SqpRange &range,
                                         bool synchronise);
                 /// Signal emitted when the variable is about to be removed from the graph
                 void variableAboutToBeRemoved(std::shared_ptr<Variable> var);
                 /// Signal emitted when the variable has been added to the graph
                 void variableAdded(std::shared_ptr<Variable> var);
             protected:
                 void closeEvent(QCloseEvent *event) override;
                 void enterEvent(QEvent *event) override;
                 void leaveEvent(QEvent *event) override;
-                QCustomPlot &plot() noexcept;
+                QCustomPlot &plot() const noexcept;
             private:
                 Ui::VisualizationGraphWidget *ui;
                 class VisualizationGraphWidgetPrivate;
                 spimpl::unique_impl_ptr<VisualizationGraphWidgetPrivate> impl;
             private slots:
                 /// Slot called when right clicking on the graph (displays a menu)
                 void onGraphMenuRequested(const QPoint &pos) noexcept;
                 /// Rescale the X axe to range parameter
                 void onRangeChanged(const QCPRange &t1, const QCPRange &t2);
                 /// Slot called when a mouse double click was made
                 void onMouseDoubleClick(QMouseEvent *event) noexcept;
                 /// Slot called when a mouse move was made
                 void onMouseMove(QMouseEvent *event) noexcept;
                 /// Slot called when a mouse wheel was made, to perform some processing before the zoom is done
                 void onMouseWheel(QWheelEvent *event) noexcept;
                 /// Slot called when a mouse press was made, to activate the calibration of a graph
                 void onMousePress(QMouseEvent *event) noexcept;
                 /// Slot called when a mouse release was made, to deactivate the calibration of a graph
                 void onMouseRelease(QMouseEvent *event) noexcept;
                 void onDataCacheVariableUpdated();
                 void onUpdateVarDisplaying(std::shared_ptr<Variable> variable, const SqpRange &range);
             };
             #endif // SCIQLOP_VISUALIZATIONGRAPHWIDGET_H

gui/include/Visualization/VisualizationZoneWidget.h +1 -1

             #ifndef SCIQLOP_VISUALIZATIONZONEWIDGET_H
             #define SCIQLOP_VISUALIZATIONZONEWIDGET_H
             #include "Visualization/IVisualizationWidget.h"
             #include "Visualization/VisualizationDragWidget.h"
             #include <QLoggingCategory>
             #include <QWidget>
             #include <memory>
             #include <Common/spimpl.h>
             Q_DECLARE_LOGGING_CATEGORY(LOG_VisualizationZoneWidget)
             namespace Ui {
             class VisualizationZoneWidget;
             } // namespace Ui
             class Variable;
             class VisualizationGraphWidget;
             class VisualizationZoneWidget : public VisualizationDragWidget, public IVisualizationWidget {
                 Q_OBJECT
             public:
                 explicit VisualizationZoneWidget(const QString &name = {}, QWidget *parent = 0);
                 virtual ~VisualizationZoneWidget();
                 /// Adds a graph widget
                 void addGraph(VisualizationGraphWidget *graphWidget);
                 /// Inserts a graph widget
                 void insertGraph(int index, VisualizationGraphWidget *graphWidget);
                 /**
                  * Creates a graph using a variable. The variable will be displayed in the new graph.
                  * The graph is added at the end.
                  * @param variable the variable for which to create the graph
                  * @return the pointer to the created graph
                  */
                 VisualizationGraphWidget *createGraph(std::shared_ptr<Variable> variable);
                 /**
                  * Creates a graph using a variable. The variable will be displayed in the new graph.
                  * The graph is inserted at the specified index.
                  * @param variable the variable for which to create the graph
                  * @param index The index where the graph should be inserted in the layout
                  * @return the pointer to the created graph
                  */
                 VisualizationGraphWidget *createGraph(std::shared_ptr<Variable> variable, int index);
                 /**
                  * Creates a graph using a list of variables. The variables will be displayed in the new graph.
                  * The graph is inserted at the specified index.
                  * @param variables List of variables to be added to the graph
                  * @param index The index where the graph should be inserted in the layout
                  * @return the pointer to the created graph
                  */
                 VisualizationGraphWidget *createGraph(const QList<std::shared_ptr<Variable> > variables,
                                                       int index);
                 // IVisualizationWidget interface
                 void accept(IVisualizationWidgetVisitor *visitor) override;
                 bool canDrop(const Variable &variable) const override;
                 bool contains(const Variable &variable) const override;
                 QString name() const override;
                 // VisualisationDragWidget
-                QMimeData *mimeData() const override;
+                QMimeData *mimeData(const QPoint &position) const override;
                 bool isDragAllowed() const override;
                 void notifyMouseMoveInGraph(const QPointF &graphPosition, const QPointF &plotPosition,
                                             VisualizationGraphWidget *graphWidget);
                 void notifyMouseLeaveGraph(VisualizationGraphWidget *graphWidget);
             protected:
                 void closeEvent(QCloseEvent *event) override;
             private:
                 Ui::VisualizationZoneWidget *ui;
                 class VisualizationZoneWidgetPrivate;
                 spimpl::unique_impl_ptr<VisualizationZoneWidgetPrivate> impl;
             private slots:
                 void onVariableAdded(std::shared_ptr<Variable> variable);
                 /// Slot called when a variable is about to be removed from a graph contained in the zone
                 void onVariableAboutToBeRemoved(std::shared_ptr<Variable> variable);
                 void dropMimeData(int index, const QMimeData *mimeData);
                 void dropMimeDataOnGraph(VisualizationDragWidget *dragWidget, const QMimeData *mimeData);
             };
             #endif // SCIQLOP_VISUALIZATIONZONEWIDGET_H

gui/src/Visualization/VisualizationDragDropContainer.cpp +20 -13

             #include "Visualization/VisualizationDragDropContainer.h"
             #include "DragAndDrop/DragDropHelper.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;
                 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_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();
                 }
                 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);
                 }
                 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,
                                                                     const QString &placeHolderText)
             {
                 impl->m_PlaceHolderType = type;
                 impl->m_PlaceHolderText = placeHolderText;
             }
             void VisualizationDragDropContainer::startDrag(VisualizationDragWidget *dragWidget,
                                                            const QPoint &dragPosition)
             {
                 auto &helper = sqpApp->dragDropHelper();
                 helper.resetDragAndDrop();
                 // Note: The management of the drag object is done by Qt
                 auto drag = new QDrag{dragWidget};
-                auto mimeData = dragWidget->mimeData();
+                auto mimeData = dragWidget->mimeData(dragPosition);
                 drag->setMimeData(mimeData);
-                auto pixmap = QPixmap(dragWidget->size());
+                auto pixmap = dragWidget->customDragPixmap(dragPosition);
-                dragWidget->render(&pixmap);
+                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) {
-                    helper.setCurrentDragWidget(dragWidget);
-                    if (impl->cursorIsInContainer(this)) {
+                    if (impl->acceptMimeData(mimeData) && impl->allowInsertForMimeData(mimeData)) {
-                        auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget);
+                        helper.setCurrentDragWidget(dragWidget);
-                        helper.insertPlaceHolder(impl->m_Layout, dragWidgetIndex, impl->m_PlaceHolderType,
-                                                 impl->m_PlaceHolderText);
+                        if (impl->cursorIsInContainer(this)) {
-                        dragWidget->setVisible(false);
+                            auto dragWidgetIndex = impl->m_Layout->indexOf(dragWidget);
+                            helper.insertPlaceHolder(impl->m_Layout, dragWidgetIndex, impl->m_PlaceHolderType,
-                    else {
+                                                     impl->m_PlaceHolderText);
-                        // The drag starts directly outside the drop zone
+                            dragWidget->setVisible(false);
-                        // do not add the placeHolder
+                        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();
                     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();
                 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();
                 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);
                 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 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/VisualizationDragWidget.cpp +6 0

             #include "Visualization/VisualizationDragWidget.h"
             #include "Visualization/VisualizationDragDropContainer.h"
             #include <QApplication>
             #include <QMouseEvent>
             #include <SqpApplication.h>
             struct VisualizationDragWidget::VisualizationDragWidgetPrivate {
                 QPoint m_DragStartPosition;
                 bool m_DragStartPositionValid = false;
                 explicit VisualizationDragWidgetPrivate() {}
             };
             VisualizationDragWidget::VisualizationDragWidget(QWidget *parent)
                     : QWidget{parent}, impl{spimpl::make_unique_impl<VisualizationDragWidgetPrivate>()}
             {
             }
+            virtual QPixmap VisualizationDragWidget::customDragPixmap(const QPoint &dragPosition)
+            {
+                Q_UNUSED(dragPosition);
+                return QPixmap();
+            }
             void VisualizationDragWidget::mousePressEvent(QMouseEvent *event)
             {
                 if (event->button() == Qt::LeftButton) {
                     impl->m_DragStartPosition = event->pos();
                 }
                 impl->m_DragStartPositionValid = isDragAllowed();
                 QWidget::mousePressEvent(event);
             }
             void VisualizationDragWidget::mouseMoveEvent(QMouseEvent *event)
             {
                 if (!impl->m_DragStartPositionValid || !isDragAllowed()) {
                     return;
                 }
                 if (!(event->buttons() & Qt::LeftButton)) {
                     return;
                 }
                 if (sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::DragAndDrop
                     || event->modifiers().testFlag(Qt::AltModifier)) {
                     if ((event->pos() - impl->m_DragStartPosition).manhattanLength()
                         < QApplication::startDragDistance()) {
                         return;
                     }
                     emit dragDetected(this, impl->m_DragStartPosition);
                 }
                 QWidget::mouseMoveEvent(event);
             }

gui/src/Visualization/VisualizationGraphWidget.cpp +79 -29

             #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/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 <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;
             /// 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;
                 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, QCustomPlot &plot)
                 {
                     endDrawingZone(plot);
                     auto axisPos = posToAxisPos(pos, plot);
                     m_DrawingZone = new VisualizationSelectionZoneItem{&plot};
                     m_DrawingZone->setRange(axisPos.x(), axisPos.x());
                     m_DrawingZone->setEditionEnabled(false);
                 }
                 void endDrawingZone(QCustomPlot &plot)
                 {
                     if (m_DrawingZone) {
                         auto drawingZoneRange = m_DrawingZone->range();
                         if (qAbs(drawingZoneRange.m_TEnd - drawingZoneRange.m_TStart) > 0) {
                             m_DrawingZone->setEditionEnabled(true);
                             m_SelectionZones.append(m_DrawingZone);
                         }
                         else {
                             plot.removeItem(m_DrawingZone); // the item is deleted by QCustomPlot
                         }
                         plot.replot(QCustomPlot::rpQueuedReplot);
                         m_DrawingZone = nullptr;
                     }
                 }
                 void setSelectionZonesEditionEnabled(bool value)
                 {
                     for (auto s : m_SelectionZones) {
                         s->setEditionEnabled(value);
                     }
                 }
+                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 | QCP::iSelectItems);
                 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);
             }
             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");
             }
             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
+            QMimeData *VisualizationGraphWidget::mimeData(const QPoint &position) const
             {
                 auto mimeData = new QMimeData;
-                mimeData->setData(MIME_TYPE_GRAPH, QByteArray{});
-                auto timeRangeData = TimeController::mimeDataForTimeRange(graphRange());
+                auto selectionZoneItemUnderCursor = impl->selectionZoneAt(position, plot());
-                mimeData->setData(MIME_TYPE_TIME_RANGE, timeRangeData);
+                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() noexcept
+            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
-                VisualizationSelectionZoneItem *selectionZoneItemUnderCursor = nullptr;
+                auto selectionZoneItemUnderCursor = impl->selectionZoneAt(event->pos(), plot());
-                auto minDistanceToZone = -1;
-                for (auto zone : impl->m_SelectionZones) {
-                    auto distanceToZone = zone->selectTest(event->pos(), true);
-                    if ((minDistanceToZone < 0 || distanceToZone <= minDistanceToZone) && distanceToZone >= 0
-                        && distanceToZone < plot().selectionTolerance()) {
-                        selectionZoneItemUnderCursor = zone;
                 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);
                 }
                 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
             {
-                if (sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::ZoomBox) {
+                bool isDragDropClick = event->modifiers().testFlag(DRAG_DROP_MODIFIER);
-                    // Starts a zoom box
-                    impl->startDrawingRect(event->pos(), plot());
+                if (!isDragDropClick) {
+                    if (sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::ZoomBox) {
-                else if (sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::SelectionZones
+                        // Starts a zoom box
-                         && impl->m_DrawingZone == nullptr) {
+                        impl->startDrawingRect(event->pos(), plot());
-                    // Starts a new selection zone
-                    auto itemAtPos = plot().itemAt(event->pos(), true);
+                    else if (sqpApp->plotsInteractionMode()
-                    if (!itemAtPos) {
+                                 == SqpApplication::PlotsInteractionMode::SelectionZones
-                        impl->startDrawingZone(event->pos(), plot());
+                             && impl->m_DrawingZone == nullptr) {
+                        // Starts a new selection zone
+                        auto zoneAtPos = impl->selectionZoneAt(event->pos(), plot());
+                        if (!zoneAtPos) {
+                            impl->startDrawingZone(event->pos(), plot());
+                        }
                     }
                 }
                 else if (sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::None) {
                     plot().setInteraction(QCP::iRangeDrag, true);
                 }
                 // Allows mouse panning only in default mode
                 plot().setInteraction(QCP::iRangeDrag, sqpApp->plotsInteractionMode()
-                                                           == SqpApplication::PlotsInteractionMode::None);
+                                                               == SqpApplication::PlotsInteractionMode::None
+                                                           && !isDragDropClick);
-                // Allows zone edition only in selection zone mode
+                // Allows zone edition only in selection zone mode without ALT pressed (ALT is for drag&drop)
-                impl->setSelectionZonesEditionEnabled(sqpApp->plotsInteractionMode()
+                impl->setSelectionZonesEditionEnabled(
-                                                      == SqpApplication::PlotsInteractionMode::SelectionZones);
+                    sqpApp->plotsInteractionMode() == SqpApplication::PlotsInteractionMode::SelectionZones
+                    && !isDragDropClick);
                 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(plot());
                 impl->m_IsCalibration = false;
             }
             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/VisualizationSelectionZoneItem.cpp +2 -1

             #include "Visualization/VisualizationSelectionZoneItem.h"
             struct VisualizationSelectionZoneItem::VisualizationSelectionZoneItemPrivate {
                 QCustomPlot *m_Plot;
                 double m_T1 = 0;
                 double m_T2 = 0;
                 QColor m_Color;
                 bool m_IsEditionEnabled = true;
                 double m_MovedOrinalT1 = 0;
                 double m_MovedOrinalT2 = 0;
                 QCPItemStraightLine *m_LeftLine;
                 QCPItemStraightLine *m_RightLine;
                 QCPItemText *m_NameLabelItem = nullptr;
                 enum class EditionMode { NoEdition, ResizeLeft, ResizeRight, Move };
                 EditionMode m_CurrentEditionMode;
                 VisualizationSelectionZoneItemPrivate(QCustomPlot *plot)
                         : m_Plot(plot), m_Color(Qt::blue), m_CurrentEditionMode(EditionMode::NoEdition)
                 {
                 }
                 void updatePosition(VisualizationSelectionZoneItem *item)
                 {
                     item->topLeft->setCoords(m_T1, 0);
                     item->bottomRight->setCoords(m_T2, 1);
                 }
                 EditionMode getEditionMode(const QPoint &pos, const VisualizationSelectionZoneItem *zoneItem)
                 {
                     auto distanceLeft = m_LeftLine->selectTest(pos, false);
                     auto distanceRight = m_RightLine->selectTest(pos, false);
-                    auto distance = zoneItem->selectTest(pos, true);
+                    auto distance = zoneItem->selectTest(pos, false);
                     if (distanceRight <= distance) {
                         return VisualizationSelectionZoneItemPrivate::EditionMode::ResizeRight;
                     }
                     else if (distanceLeft <= distance) {
                         return VisualizationSelectionZoneItemPrivate::EditionMode::ResizeLeft;
                     }
                     return VisualizationSelectionZoneItemPrivate::EditionMode::Move;
                 }
             };
             VisualizationSelectionZoneItem::VisualizationSelectionZoneItem(QCustomPlot *plot)
                     : QCPItemRect(plot),
                       impl{spimpl::make_unique_impl<VisualizationSelectionZoneItemPrivate>(plot)}
             {
                 topLeft->setTypeX(QCPItemPosition::ptPlotCoords);
                 topLeft->setTypeY(QCPItemPosition::ptAxisRectRatio);
                 bottomRight->setTypeX(QCPItemPosition::ptPlotCoords);
                 bottomRight->setTypeY(QCPItemPosition::ptAxisRectRatio);
                 impl->m_RightLine = new QCPItemStraightLine(plot);
                 impl->m_RightLine->point1->setParentAnchor(topRight);
                 impl->m_RightLine->point2->setParentAnchor(bottomRight);
                 impl->m_RightLine->point1->setTypeX(QCPItemPosition::ptAbsolute);
                 impl->m_RightLine->point1->setTypeY(QCPItemPosition::ptAbsolute);
                 impl->m_RightLine->point2->setTypeX(QCPItemPosition::ptAbsolute);
                 impl->m_RightLine->point2->setTypeY(QCPItemPosition::ptAbsolute);
                 impl->m_LeftLine = new QCPItemStraightLine(plot);
                 impl->m_LeftLine->point1->setParentAnchor(topLeft);
                 impl->m_LeftLine->point2->setParentAnchor(bottomLeft);
                 impl->m_LeftLine->point1->setTypeX(QCPItemPosition::ptAbsolute);
                 impl->m_LeftLine->point1->setTypeY(QCPItemPosition::ptAbsolute);
                 impl->m_LeftLine->point2->setTypeX(QCPItemPosition::ptAbsolute);
                 impl->m_LeftLine->point2->setTypeY(QCPItemPosition::ptAbsolute);
                 impl->m_RightLine->setSelectable(false);
                 impl->m_LeftLine->setSelectable(false);
                 //    connect(this, &VisualizationSelectionZoneItem::selectionChanged, impl->m_RightLine,
                 //            &QCPItemStraightLine::setSelected);
                 //    connect(this, &VisualizationSelectionZoneItem::selectionChanged, impl->m_LeftLine,
                 //            &QCPItemStraightLine::setSelected);
                 setColor(QColor("#E79D41"));
             }
             VisualizationSelectionZoneItem::~VisualizationSelectionZoneItem()
             {
                 impl->m_Plot->removeItem(impl->m_RightLine);
                 impl->m_Plot->removeItem(impl->m_LeftLine);
             }
             void VisualizationSelectionZoneItem::setName(const QString &name)
             {
                 if (name.isEmpty() && impl->m_NameLabelItem) {
                     impl->m_Plot->removeItem(impl->m_NameLabelItem);
                     impl->m_NameLabelItem = nullptr;
                 }
                 else if (!impl->m_NameLabelItem) {
                     impl->m_NameLabelItem = new QCPItemText(impl->m_Plot);
                     impl->m_NameLabelItem->setText(name);
                     impl->m_NameLabelItem->setPositionAlignment(Qt::AlignHCenter | Qt::AlignTop);
                     impl->m_NameLabelItem->setColor(impl->m_Color);
                     impl->m_NameLabelItem->position->setParentAnchor(top);
                 }
             }
             QString VisualizationSelectionZoneItem::name() const
             {
                 if (!impl->m_NameLabelItem) {
                     return QString();
                 }
                 return impl->m_NameLabelItem->text();
             }
             SqpRange VisualizationSelectionZoneItem::range() const
             {
                 SqpRange range;
                 range.m_TStart = impl->m_T1 <= impl->m_T2 ? impl->m_T1 : impl->m_T2;
                 range.m_TEnd = impl->m_T1 > impl->m_T2 ? impl->m_T1 : impl->m_T2;
                 return range;
             }
             void VisualizationSelectionZoneItem::setRange(double tstart, double tend)
             {
                 impl->m_T1 = tstart;
                 impl->m_T2 = tend;
                 impl->updatePosition(this);
             }
             void VisualizationSelectionZoneItem::setStart(double tstart)
             {
                 impl->m_T1 = tstart;
                 impl->updatePosition(this);
             }
             void VisualizationSelectionZoneItem::setEnd(double tend)
             {
                 impl->m_T2 = tend;
                 impl->updatePosition(this);
             }
             void VisualizationSelectionZoneItem::setColor(const QColor &color)
             {
                 impl->m_Color = color;
                 auto brushColor = color;
                 brushColor.setAlpha(40);
                 setBrush(QBrush(brushColor));
                 setPen(QPen(Qt::NoPen));
                 auto selectedBrushColor = brushColor;
                 selectedBrushColor.setAlpha(65);
                 setSelectedBrush(QBrush(selectedBrushColor));
                 setSelectedPen(QPen(Qt::NoPen));
                 auto linePen = QPen(color);
                 linePen.setStyle(Qt::SolidLine);
                 linePen.setWidth(2);
                 auto selectedLinePen = linePen;
                 selectedLinePen.setColor(color.darker(30));
                 impl->m_LeftLine->setPen(linePen);
                 impl->m_RightLine->setPen(linePen);
                 impl->m_LeftLine->setSelectedPen(selectedLinePen);
                 impl->m_RightLine->setSelectedPen(selectedLinePen);
             }
             void VisualizationSelectionZoneItem::setEditionEnabled(bool value)
             {
                 impl->m_IsEditionEnabled = value;
                 setSelectable(value);
                 if (!value) {
                     setSelected(false);
+                    impl->m_CurrentEditionMode = VisualizationSelectionZoneItemPrivate::EditionMode::NoEdition;
                 }
             }
             bool VisualizationSelectionZoneItem::isEditionEnabled() const
             {
                 return impl->m_IsEditionEnabled;
             }
             Qt::CursorShape
             VisualizationSelectionZoneItem::curshorShapeForPosition(const QPoint &position) const
             {
                 auto mode = impl->m_CurrentEditionMode
                                     == VisualizationSelectionZoneItemPrivate::EditionMode::NoEdition
                                 ? impl->getEditionMode(position, this)
                                 : impl->m_CurrentEditionMode;
                 switch (mode) {
                     case VisualizationSelectionZoneItemPrivate::EditionMode::Move:
                         return Qt::SizeAllCursor;
                     case VisualizationSelectionZoneItemPrivate::EditionMode::ResizeLeft:
                     case VisualizationSelectionZoneItemPrivate::EditionMode::ResizeRight: // fallthrough
                         return Qt::SizeHorCursor;
                     default:
                         return Qt::ArrowCursor;
                 }
             }
             void VisualizationSelectionZoneItem::setHovered(bool value)
             {
                 if (value) {
                     auto linePen = impl->m_LeftLine->pen();
                     linePen.setStyle(Qt::DotLine);
                     linePen.setWidth(3);
                     auto selectedLinePen = impl->m_LeftLine->selectedPen();
                     ;
                     selectedLinePen.setStyle(Qt::DotLine);
                     selectedLinePen.setWidth(3);
                     impl->m_LeftLine->setPen(linePen);
                     impl->m_RightLine->setPen(linePen);
                     impl->m_LeftLine->setSelectedPen(selectedLinePen);
                     impl->m_RightLine->setSelectedPen(selectedLinePen);
                 }
                 else {
                     setColor(impl->m_Color);
                 }
             }
             void VisualizationSelectionZoneItem::mousePressEvent(QMouseEvent *event, const QVariant &details)
             {
                 if (isEditionEnabled()) {
                     impl->m_CurrentEditionMode = impl->getEditionMode(event->pos(), this);
                     impl->m_MovedOrinalT1 = impl->m_T1;
                     impl->m_MovedOrinalT2 = impl->m_T2;
                 }
                 else {
                     event->ignore();
                 }
             }
             void VisualizationSelectionZoneItem::mouseMoveEvent(QMouseEvent *event, const QPointF &startPos)
             {
                 if (isEditionEnabled()) {
                     auto axis = impl->m_Plot->axisRect()->axis(QCPAxis::atBottom);
                     auto diff = axis->pixelToCoord(event->pos().x()) - axis->pixelToCoord(startPos.x());
                     switch (impl->m_CurrentEditionMode) {
                         case VisualizationSelectionZoneItemPrivate::EditionMode::Move:
                             setRange(impl->m_MovedOrinalT1 + diff, impl->m_MovedOrinalT2 + diff);
                             break;
                         case VisualizationSelectionZoneItemPrivate::EditionMode::ResizeLeft:
                             setStart(impl->m_MovedOrinalT1 + diff);
                             break;
                         case VisualizationSelectionZoneItemPrivate::EditionMode::ResizeRight:
                             setEnd(impl->m_MovedOrinalT2 + diff);
                             break;
                             // default:
                             // unknown edition mode
                     }
                 }
                 else {
                     event->ignore();
                 }
             }
             void VisualizationSelectionZoneItem::mouseReleaseEvent(QMouseEvent *event, const QPointF &startPos)
             {
                 if (isEditionEnabled()) {
                     impl->m_CurrentEditionMode = VisualizationSelectionZoneItemPrivate::EditionMode::NoEdition;
                 }
                 else {
                     event->ignore();
                 }
             }

gui/src/Visualization/VisualizationZoneWidget.cpp +5 -1

             #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 <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;
                 // Returns the first graph in the zone or nullptr if there is no graph inside
                 VisualizationGraphWidget *firstGraph(const VisualizationZoneWidget *zoneWidget) const
                 {
                     VisualizationGraphWidget *firstGraph = nullptr;
                     auto layout = zoneWidget->ui->dragDropContainer->layout();
                     if (layout->count() > 0) {
                         if (auto visualizationGraphWidget
                             = qobject_cast<VisualizationGraphWidget *>(layout->itemAt(0)->widget())) {
                             firstGraph = visualizationGraphWidget;
                         }
                     }
                     return firstGraph;
                 }
                 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->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,
                                                                                   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 = impl->firstGraph(this)) {
                     // 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;
             }
             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
+            QMimeData *VisualizationZoneWidget::mimeData(const QPoint &position) const
             {
+                Q_UNUSED(position);
                 auto mimeData = new QMimeData;
                 mimeData->setData(MIME_TYPE_ZONE, QByteArray{});
                 if (auto firstGraph = impl->firstGraph(this)) {
                     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 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
                     zoneWidget->createGraph(variables, index);
                 }
                 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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