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

     /****************************************************************************
     **
     ** Copyright (C) 2007-2007 Trolltech ASA. All rights reserved.
     **
     ** This file is part of the example classes of the Qt Toolkit.
     **
     ** This file may be used under the terms of the GNU General Public
     ** License version 2.0 as published by the Free Software Foundation
     ** and appearing in the file LICENSE.GPL included in the packaging of
     ** this file.  Please review the following information to ensure GNU
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     ** review the following information:
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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