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

    /****************************************************************************
    **
    ** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
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    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
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    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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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