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# imageviewer.h Example File
widgets/imageviewer/imageviewer.h

     /****************************************************************************
     **
     ** Copyright (C) 2005-2007 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
     ** General Public Licensing requirements will be met:
     ** http://www.trolltech.com/products/qt/opensource.html
     **
     ** If you are unsure which license is appropriate for your use, please
     ** review the following information:
     ** http://www.trolltech.com/products/qt/licensing.html or contact the
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     **
     ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
     ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
     **
     ****************************************************************************/

     #ifndef IMAGEVIEWER_H
     #define IMAGEVIEWER_H

     #include <QMainWindow>
     #include <QPrinter>

     class QAction;
     class QLabel;
     class QMenu;
     class QScrollArea;
     class QScrollBar;

     class ImageViewer : public QMainWindow
     {
         Q_OBJECT

     public:
         ImageViewer();

     private slots:
         void open();
         void print();
         void zoomIn();
         void zoomOut();
         void normalSize();
         void fitToWindow();
         void about();

     private:
         void createActions();
         void createMenus();
         void updateActions();
         void scaleImage(double factor);
         void adjustScrollBar(QScrollBar *scrollBar, double factor);

         QLabel *imageLabel;
         QScrollArea *scrollArea;
         double scaleFactor;

         QPrinter printer;

         QAction *openAct;
         QAction *printAct;
         QAction *exitAct;
         QAction *zoomInAct;
         QAction *zoomOutAct;
         QAction *normalSizeAct;
         QAction *fitToWindowAct;
         QAction *aboutAct;
         QAction *aboutQtAct;

         QMenu *fileMenu;
         QMenu *viewMenu;
         QMenu *helpMenu;
     };

     #endif