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# imagecomposer.h Example File
painting/imagecomposition/imagecomposer.h

     /****************************************************************************
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     ** Copyright (C) 2006-2007 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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     #ifndef IMAGECOMPOSER_H
     #define IMAGECOMPOSER_H

     #include <QPainter>
     #include <QWidget>

     class QComboBox;
     class QLabel;
     class QToolButton;

     class ImageComposer : public QWidget
     {
         Q_OBJECT

     public:
         ImageComposer();

     private slots:
         void chooseSource();
         void chooseDestination();
         void recalculateResult();

     private:
         void addOp(QPainter::CompositionMode mode, const QString &name);
         void chooseImage(const QString &title, QImage *image, QToolButton *button);
         void loadImage(const QString &fileName, QImage *image, QToolButton *button);
         QPainter::CompositionMode currentMode() const;
         QPoint imagePos(const QImage &image) const;

         QToolButton *sourceButton;
         QToolButton *destinationButton;
         QComboBox *operatorComboBox;
         QLabel *equalLabel;
         QLabel *resultLabel;

         QImage sourceImage;
         QImage destinationImage;
         QImage resultImage;
     };

     #endif