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# mainwindow.h Example File
tools/undoframework/mainwindow.h

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     #ifndef MAINWINDOW_H
     #define MAINWINDOW_H

     #include <QMainWindow>

     class QAction;
     class QToolBar;
     class QMenu;
     class QUndoStack;
     class QUndoView;
     class DiagramScene;
     class DiagramItem;

     class MainWindow : public QMainWindow
     {
         Q_OBJECT

     public:
         MainWindow();

     public slots:
         void itemMoved(DiagramItem *movedDiagram, const QPointF &moveStartPosition);

     private slots:
         void deleteItem();
         void addBox();
         void addTriangle();
         void about();
         void itemMenuAboutToShow();
         void itemMenuAboutToHide();

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

         QAction *deleteAction;
         QAction *addBoxAction;
         QAction *addTriangleAction;
         QAction *undoAction;
         QAction *redoAction;
         QAction *exitAction;
         QAction *aboutAction;

         QMenu *fileMenu;
         QMenu *editMenu;
         QMenu *itemMenu;
         QMenu *helpMenu;

         DiagramScene *diagramScene;
         QUndoStack *undoStack;
         QUndoView *undoView;
     };

     #endif