##// END OF EJS Templates
drop of variables in the visualization
drop of variables in the visualization

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DragDropHelper.h
85 lines | 2.6 KiB | text/x-c | CLexer
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r847 #ifndef SCIQLOP_DRAGDROPHELPER_H
#define SCIQLOP_DRAGDROPHELPER_H
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r840
#include <Common/spimpl.h>
drop of variables in the visualization
r852 #include <QLoggingCategory>
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r840 #include <QWidget>
class QVBoxLayout;
class QScrollArea;
class VisualizationDragWidget;
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r852 class VisualizationDragDropContainer;
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r840 class QMimeData;
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r852 Q_DECLARE_LOGGING_CATEGORY(LOG_DragDropHelper)
Manage the scroll of the tab QScrollArea during a drag&drop operation
r843
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r840 /**
* @brief Helper class for drag&drop operations.
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r852 * @note The helper is accessible from the sqpApp singleton and has the same life as the whole
* application (like a controller). But contrary to a controller, it doesn't live in a thread and
* can interect with the gui.
* @see SqpApplication
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r840 */
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r847 class DragDropHelper {
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r840 public:
static const QString MIME_TYPE_GRAPH;
static const QString MIME_TYPE_ZONE;
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r847 DragDropHelper();
virtual ~DragDropHelper();
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r852 /// Resets some internal variables. Must be called before any new drag&drop operation.
void resetDragAndDrop();
/// Sets the visualization widget currently being drag on the visualization.
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r847 void setCurrentDragWidget(VisualizationDragWidget *dragWidget);
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/// Returns the visualization widget currently being drag on the visualization.
/// Can be null if a new visualization widget is intended to be created by the drag&drop
/// operation.
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r847 VisualizationDragWidget *getCurrentDragWidget() const;
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QWidget &placeHolder() const;
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r847 void insertPlaceHolder(QVBoxLayout *layout, int index);
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r840 void removePlaceHolder();
bool isPlaceHolderSet() const;
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r852 /// Checks if the specified mime data is valid for a drop in the visualization
bool checkMimeDataForVisualization(const QMimeData *mimeData,
VisualizationDragDropContainer *dropContainer);
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r847 void addDragDropScrollArea(QScrollArea *scrollArea);
void removeDragDropScrollArea(QScrollArea *scrollArea);
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r847 QUrl imageTemporaryUrl(const QImage &image) const;
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private:
class DragDropHelperPrivate;
spimpl::unique_impl_ptr<DragDropHelperPrivate> impl;
};
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r852 /**
* @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();
};
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r847 #endif // SCIQLOP_DRAGDROPHELPER_H