RGraphicsViewQt.h

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#ifndef RGRAPHICSVIEWQT_H
#define RGRAPHICSVIEWQT_H
 
#include "gui_global.h"
 
#include <QElapsedTimer>
#include <QWidget>
 
#include "RVector.h"
 
class QFrame;
class QGestureEvent;
class RGraphicsViewImage;
 
class QCADGUI_EXPORT RGraphicsViewQt : public QWidget {
    Q_OBJECT
 
public:
    RGraphicsViewQt(QWidget* parent=NULL, bool showFocus=true);
    virtual ~RGraphicsViewQt();
 
    void setImageView(RGraphicsViewImage* v);
 
    RGraphicsViewImage* getImageView() const {
        return imageView;
    }
    
    void disableGestures() {
        gesturesEnabled = false;
        ungrabGesture(Qt::PanGesture);
        ungrabGesture(Qt::PinchGesture);
    }
 
    virtual void removeFocus();
 
    virtual int getWidth() const;
    virtual int getHeight() const;
    virtual QRect getRect() const;
 
    virtual bool getSignalsBlocked() const;
    virtual void setSignalsBlocked(bool on);
    
    void setFocusFrameWidget(QFrame* w);
 
    virtual void simulateMouseMoveEvent();
 
    virtual QSize sizeHint() const;
 
signals:
    void drop(QDropEvent* event);
    void dragEnter(QDragEnterEvent* event);
 
protected:
 
    bool event(QEvent* e);
 
    bool gestureEvent(QGestureEvent* event);
 
    virtual void focusInEvent(QFocusEvent* event);
    virtual void focusOutEvent(QFocusEvent* event);
 
    virtual void tabletEvent(QTabletEvent *event);
    virtual void mouseMoveEvent(QMouseEvent* event);
    virtual void mousePressEvent(QMouseEvent* event);
    virtual void mouseReleaseEvent(QMouseEvent* event);
    virtual void mouseDoubleClickEvent(QMouseEvent* event);
    virtual void wheelEvent(QWheelEvent* event);
    virtual void paintEvent(QPaintEvent*);
    virtual void resizeEvent(QResizeEvent* event);
    virtual void keyPressEvent(QKeyEvent* event);
    virtual void keyReleaseEvent(QKeyEvent* event);
    virtual void dragEnterEvent(QDragEnterEvent* event);
    virtual void dropEvent(QDropEvent* event);
    virtual bool focusNextPrevChild(bool next) {
        // ignore tab key:
        return false;
    }
 
private slots:
    void imageViewDeleted();
 
private:
    Qt::MouseButtons lastButtonState;
 
    bool showFocus;
 
    QFrame* focusFrameWidget;
 
    bool gesturesEnabled;
    QElapsedTimer mouseClickTimer;
    RVector mousePressScreenPosition;
    RVector mousePressModelPosition;
    bool gotMouseButtonPress;
 
    // backend to render to bitmap (can be QPainter or Skia):
    RGraphicsViewImage* imageView;
};
 
Q_DECLARE_METATYPE(RGraphicsViewQt*)
 
#endif