view.h Example File

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 #ifndef VIEW_H
 #define VIEW_H

 #include <QFrame>
 #include <QGraphicsView>

 QT_FORWARD_DECLARE_CLASS(QLabel)
 QT_FORWARD_DECLARE_CLASS(QSlider)
 QT_FORWARD_DECLARE_CLASS(QToolButton)

 class View;

 class GraphicsView : public QGraphicsView
 {
     Q_OBJECT
 public:
     GraphicsView(View *v) : QGraphicsView(), view(v) { }

 protected:
     void wheelEvent(QWheelEvent *);

 private:
     View *view;
 };

 class View : public QFrame
 {
     Q_OBJECT
 public:
     View(const QString &name, QWidget *parent = 0);

     QGraphicsView *view() const;

 public slots:
     void zoomIn(int level = 1);
     void zoomOut(int level = 1);

 private slots:
     void resetView();
     void setResetButtonEnabled();
     void setupMatrix();
     void togglePointerMode();
     void toggleOpenGL();
     void toggleAntialiasing();
     void print();
     void rotateLeft();
     void rotateRight();

 private:
     GraphicsView *graphicsView;
     QLabel *label;
     QLabel *label2;
     QToolButton *selectModeButton;
     QToolButton *dragModeButton;
     QToolButton *openGlButton;
     QToolButton *antialiasButton;
     QToolButton *printButton;
     QToolButton *resetButton;
     QSlider *zoomSlider;
     QSlider *rotateSlider;
 };

 #endif