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mainwindow.h Example File
multitouch/fingerpaint/mainwindow.h

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 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H

 #include <QList>
 #include <QMainWindow>

 class ScribbleArea;

 class MainWindow : public QMainWindow
 {
     Q_OBJECT

 public:
     MainWindow();

 protected:
     void closeEvent(QCloseEvent *event);

 private slots:
     void open();
     void save();
     void about();

 private:
     void createActions();
     void createMenus();
     bool maybeSave();
     bool saveFile(const QByteArray &fileFormat);

     ScribbleArea *scribbleArea;

     QMenu *saveAsMenu;
     QMenu *fileMenu;
     QMenu *optionMenu;
     QMenu *helpMenu;

     QAction *openAct;
     QList<QAction *> saveAsActs;
     QAction *exitAct;
     QAction *printAct;
     QAction *clearScreenAct;
     QAction *aboutAct;
     QAction *aboutQtAct;
 };

 #endif