mainwindow.h Example File
mainwindows/mdi/mainwindow.h

 /****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** No Commercial Usage
 ** This file contains pre-release code and may not be distributed.
 ** You may use this file in accordance with the terms and conditions
 ** contained in the Technology Preview License Agreement accompanying
 ** this package.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 2.1 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU Lesser General Public License version 2.1 requirements
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** In addition, as a special exception, Nokia gives you certain additional
 ** rights.  These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** If you have questions regarding the use of this file, please contact
 ** Nokia at qt-info@nokia.com.
 **
 **
 **
 **
 **
 **
 **
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef MAINWINDOW_H
 #define MAINWINDOW_H

 #include <QMainWindow>

 class MdiChild;
 class QAction;
 class QMenu;
 class QMdiArea;
 class QMdiSubWindow;
 class QSignalMapper;

 class MainWindow : public QMainWindow
 {
     Q_OBJECT

 public:
     MainWindow();

 protected:
     void closeEvent(QCloseEvent *event);

 private slots:
     void newFile();
     void open();
     void save();
     void saveAs();
     void cut();
     void copy();
     void paste();
     void about();
     void updateMenus();
     void updateWindowMenu();
     MdiChild *createMdiChild();
     void switchLayoutDirection();
     void setActiveSubWindow(QWidget *window);

 private:
     void createActions();
     void createMenus();
     void createToolBars();
     void createStatusBar();
     void readSettings();
     void writeSettings();
     MdiChild *activeMdiChild();
     QMdiSubWindow *findMdiChild(const QString &fileName);

     QMdiArea *mdiArea;
     QSignalMapper *windowMapper;

     QMenu *fileMenu;
     QMenu *editMenu;
     QMenu *windowMenu;
     QMenu *helpMenu;
     QToolBar *fileToolBar;
     QToolBar *editToolBar;
     QAction *newAct;
     QAction *openAct;
     QAction *saveAct;
     QAction *saveAsAct;
     QAction *exitAct;
     QAction *cutAct;
     QAction *copyAct;
     QAction *pasteAct;
     QAction *closeAct;
     QAction *closeAllAct;
     QAction *tileAct;
     QAction *cascadeAct;
     QAction *nextAct;
     QAction *previousAct;
     QAction *separatorAct;
     QAction *aboutAct;
     QAction *aboutQtAct;
 };

 #endif