diagramscene.h Example File
graphicsview/diagramscene/diagramscene.h
#ifndef DIAGRAMSCENE_H
#define DIAGRAMSCENE_H
#include "diagramitem.h"
#include "diagramtextitem.h"
#include <QGraphicsScene>
class QGraphicsSceneMouseEvent;
class QMenu;
class QPointF;
class QGraphicsLineItem;
class QFont;
class QGraphicsTextItem;
class QColor;
class DiagramScene : public QGraphicsScene
{
Q_OBJECT
public:
enum Mode { InsertItem, InsertLine, InsertText, MoveItem };
explicit DiagramScene(QMenu *itemMenu, QObject *parent = 0);
QFont font() const { return myFont; }
QColor textColor() const { return myTextColor; }
QColor itemColor() const { return myItemColor; }
QColor lineColor() const { return myLineColor; }
void setLineColor(const QColor &color);
void setTextColor(const QColor &color);
void setItemColor(const QColor &color);
void setFont(const QFont &font);
public slots:
void setMode(Mode mode);
void setItemType(DiagramItem::DiagramType type);
void editorLostFocus(DiagramTextItem *item);
signals:
void itemInserted(DiagramItem *item);
void textInserted(QGraphicsTextItem *item);
void itemSelected(QGraphicsItem *item);
protected:
void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent) override;
void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent) override;
void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent) override;
private:
bool isItemChange(int type);
DiagramItem::DiagramType myItemType;
QMenu *myItemMenu;
Mode myMode;
bool leftButtonDown;
QPointF startPoint;
QGraphicsLineItem *line;
QFont myFont;
DiagramTextItem *textItem;
QColor myTextColor;
QColor myItemColor;
QColor myLineColor;
};
#endif // DIAGRAMSCENE_H