|
|
#ifndef DRAGDROPHELPER_H
|
|
|
#define DRAGDROPHELPER_H
|
|
|
|
|
|
#include <Common/spimpl.h>
|
|
|
#include <QWidget>
|
|
|
|
|
|
class QVBoxLayout;
|
|
|
class QScrollArea;
|
|
|
class VisualizationDragWidget;
|
|
|
class QMimeData;
|
|
|
|
|
|
/**
|
|
|
* @brief Event filter class which manage the scroll of QScrollArea during a drag&drop operation.
|
|
|
* @note A QScrollArea inside an other QScrollArea is not fully supported.
|
|
|
*/
|
|
|
class DragDropScroller : public QObject
|
|
|
{
|
|
|
Q_OBJECT
|
|
|
|
|
|
public:
|
|
|
DragDropScroller(QObject* parent = nullptr);
|
|
|
|
|
|
void addScrollArea(QScrollArea* scrollArea);
|
|
|
void removeScrollArea(QScrollArea* scrollArea);
|
|
|
|
|
|
protected:
|
|
|
bool eventFilter(QObject *obj, QEvent *event);
|
|
|
|
|
|
private:
|
|
|
class DragDropScrollerPrivate;
|
|
|
spimpl::unique_impl_ptr<DragDropScrollerPrivate> impl;
|
|
|
|
|
|
private slots:
|
|
|
void onTimer();
|
|
|
};
|
|
|
|
|
|
/**
|
|
|
* @brief Helper class for drag&drop operations.
|
|
|
*/
|
|
|
class DragDropHelper
|
|
|
{
|
|
|
public:
|
|
|
DragDropHelper();
|
|
|
~DragDropHelper();
|
|
|
|
|
|
static const QString MIME_TYPE_GRAPH;
|
|
|
static const QString MIME_TYPE_ZONE;
|
|
|
|
|
|
void setCurrentDragWidget(VisualizationDragWidget* dragWidget);
|
|
|
VisualizationDragWidget* getCurrentDragWidget() const;
|
|
|
|
|
|
QWidget &placeHolder() const;
|
|
|
void insertPlaceHolder(QVBoxLayout* layout, int index);
|
|
|
void removePlaceHolder();
|
|
|
bool isPlaceHolderSet() const;
|
|
|
|
|
|
void addDragDropScrollArea(QScrollArea* scrollArea);
|
|
|
void removeDragDropScrollArea(QScrollArea* scrollArea);
|
|
|
|
|
|
QUrl imageTemporaryUrl(const QImage& image) const;
|
|
|
|
|
|
private:
|
|
|
class DragDropHelperPrivate;
|
|
|
spimpl::unique_impl_ptr<DragDropHelperPrivate> impl;
|
|
|
};
|
|
|
|
|
|
#endif // DRAGDROPHELPER_H
|
|
|
|
