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# mainwindow.h Example File
widgets/tablet/mainwindow.h

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     #ifndef MAINWINDOW_H
     #define MAINWINDOW_H

     #include <QMainWindow>

     class QAction;
     class QActionGroup;
     class QMenu;
     class QStatusBar;
     class TabletCanvas;

     class MainWindow : public QMainWindow
     {
         Q_OBJECT

     public:
         MainWindow(TabletCanvas *canvas);

     private slots:
         void brushColorAct();
         void alphaActionTriggered(QAction *action);
         void lineWidthActionTriggered(QAction *action);
         void saturationActionTriggered(QAction *action);
         void saveAct();
         void loadAct();
         void aboutAct();

     private:
         void createActions();
         void createMenus();

         TabletCanvas *myCanvas;

         QAction *brushColorAction;
         QActionGroup *brushActionGroup;

         QActionGroup *alphaChannelGroup;
         QAction *alphaChannelPressureAction;
         QAction *alphaChannelTiltAction;
         QAction *noAlphaChannelAction;

         QActionGroup *colorSaturationGroup;
         QAction *colorSaturationVTiltAction;
         QAction *colorSaturationHTiltAction;
         QAction *colorSaturationPressureAction;
         QAction *noColorSaturationAction;

         QActionGroup *lineWidthGroup;
         QAction *lineWidthPressureAction;
         QAction *lineWidthTiltAction;
         QAction *lineWidthFixedAction;

         QAction *exitAction;
         QAction *saveAction;
         QAction *loadAction;

         QAction *aboutAction;
         QAction *aboutQtAction;

         QMenu *fileMenu;
         QMenu *brushMenu;
         QMenu *tabletMenu;
         QMenu *helpMenu;
         QMenu *colorSaturationMenu;
         QMenu *lineWidthMenu;
         QMenu *alphaChannelMenu;
     };

     #endif