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#include "DragDropHelper.h"
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#include "Visualization/VisualizationDragWidget.h"
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#include "SqpApplication.h"
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#include <QDragMoveEvent>
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#include <QDragEnterEvent>
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#include <QScrollBar>
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#include <QScrollArea>
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#include <QVBoxLayout>
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#include <QTimer>
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#include <QDir>
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const QString DragDropHelper::MIME_TYPE_GRAPH = "scqlop/graph";
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const QString DragDropHelper::MIME_TYPE_ZONE = "scqlop/zone";
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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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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 QTemporaryFile to have a name which is not generated.
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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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m_placeHolder->setStyleSheet("background-color: #BBD5EE; border:2px solid #2A7FD4");
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sqpApp->installEventFilter(m_dragDropScroller.get());
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m_imageTempUrl = QDir::temp().absoluteFilePath("Scqlop_graph.png");
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}
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void preparePlaceHolder() const
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{
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if (m_currentDragWidget)
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{
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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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{
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m_placeHolder->setMinimumSize(200, 200);
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}
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}
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};
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DragDropHelper::DragDropHelper() :
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impl{spimpl::make_unique_impl<DragDropHelperPrivate>()}
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{
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}
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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::setCurrentDragWidget(VisualizationDragWidget *dragWidget)
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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)
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{
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removePlaceHolder();
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impl->preparePlaceHolder();
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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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{
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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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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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