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