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

        /****************************************************************************
        **
        ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
        **
        ** This file is part of the documentation 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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        ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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        ****************************************************************************/

        #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