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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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     7 ** This file is part of the examples of the Qt Toolkit.

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    16 ** GNU Lesser General Public License Usage

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    41 

    42 #ifndef IMAGEVIEWER_H

    43 #define IMAGEVIEWER_H

    44 

    45 #include <QMainWindow>

    46 #include <QPrinter>

    47 

    48 QT_BEGIN_NAMESPACE

    49 class QAction;

    50 class QLabel;

    51 class QMenu;

    52 class QScrollArea;

    53 class QScrollBar;

    54 QT_END_NAMESPACE

    55 

    56 //! [0]

    57 class ImageViewer : public QMainWindow

    58 {

    59     Q_OBJECT

    60 

    61 public:

    62     ImageViewer();

    63 

    64 private slots:

    65     void open();

    66     void print();

    67     void zoomIn();

    68     void zoomOut();

    69     void normalSize();

    70     void fitToWindow();

    71     void about();

    72 

    73 private:

    74     void createActions();

    75     void createMenus();

    76     void updateActions();

    77     void scaleImage(double factor);

    78     void adjustScrollBar(QScrollBar *scrollBar, double factor);

    79 

    80     QLabel *imageLabel;

    81     QScrollArea *scrollArea;

    82     double scaleFactor;

    83 

    84 #ifndef QT_NO_PRINTER

    85     QPrinter printer;

    86 #endif

    87 

    88     QAction *openAct;

    89     QAction *printAct;

    90     QAction *exitAct;

    91     QAction *zoomInAct;

    92     QAction *zoomOutAct;

    93     QAction *normalSizeAct;

    94     QAction *fitToWindowAct;

    95     QAction *aboutAct;

    96     QAction *aboutQtAct;

    97 

    98     QMenu *fileMenu;

    99     QMenu *viewMenu;

   100     QMenu *helpMenu;

   101 };

   102 //! [0]

   103 

   104 #endif