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# panel.h Example File
graphicsview/padnavigator/panel.h

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     #include <QtGui/qgraphicsview.h>

     class E_CLASS(QTimeLine;;
     class E_CLASS(Ui_BackSide;;

     class RoundRectItem;

     class Panel : public QGraphicsView
     {
         Q_OBJECT
     public:
         Panel(int width, int height);
         ~Panel();

     protected:
         void keyPressEvent(QKeyEvent *event);
         void resizeEvent(QResizeEvent *event);

     private Q_SLOTS:
         void updateSelectionStep(qreal val);
         void updateFlipStep(qreal val);
         void flip();

     private:
         QPointF posForLocation(int x, int y) const;

         QGraphicsScene *scene;
         RoundRectItem *selectionItem;
         RoundRectItem *baseItem;
         RoundRectItem *backItem;
         QTimeLine *selectionTimeLine;
         QTimeLine *flipTimeLine;
         int selectedX, selectedY;

         QGraphicsItem ***grid;

         QPointF startPos;
         QPointF endPos;
         qreal xrot, yrot;
         qreal xrot2, yrot2;

         int width;
         int height;
         bool flipped;
         bool flipLeft;

         Ui_BackSide *ui;
     };