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mainwindow.h Example File
widgets/dialogbuttonbox/mainwindow.h

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 ** This file is part of the example classes of the Qt Toolkit.
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 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H

 #include <QtGui>
 #include <QMainWindow>

 #include "ui_mainwindow.h"

 class QMdiArea;
 class QMdiSubWindow;
 class QGroupBox;
 class QAction;
 class QActionGroup;
 class QMenu;
 class QDialogButtonBox;
 class QCloseEvent;

 class MainWindow : public QMainWindow, Ui::MainWindow
 {
     Q_OBJECT

 public:
     enum Presets { SaveChanges, ReallyQuit, FileError, Empty };

     MainWindow();

 private slots:
     void addButton();
     void deleteButton();
     void loadPresetBox();
     void newStyle(QAction *action);
     void newOrientation(QAction *action);
     void subWindowActivated(QMdiSubWindow *widget);

 private:
     void connectActions();
     QWidget *createDialogButtonBox(Presets present);
     void setStyle(QDialogButtonBox *widget, QStyle *style);
     void resolveButtons();
     void resizeActiveWindow();

     int windowCount;

     QMdiArea *mdiArea;
     QMdiSubWindow *currentWindow;

     QActionGroup *styleGroup;
     QActionGroup *orientationGroup;

     QAbstractButton *myAddButton;
     QAbstractButton *myDeleteButton;
 };

 #endif


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Qt 4.3.0beta