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# mandelbrotwidget.h Example File
threads/mandelbrot/mandelbrotwidget.h

        /****************************************************************************
        **
        ** Copyright (C) 2004-2006 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.
        **
        ** Contact info@trolltech.com if any conditions of this licensing are
        ** not clear to you.
        **
        ** 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 MANDELBROTWIDGET_H
        #define MANDELBROTWIDGET_H

        #include <QPixmap>
        #include <QWidget>

        #include "renderthread.h"

        class MandelbrotWidget : public QWidget
        {
            Q_OBJECT

        public:
            MandelbrotWidget(QWidget *parent = 0);

        protected:
            void paintEvent(QPaintEvent *event);
            void resizeEvent(QResizeEvent *event);
            void keyPressEvent(QKeyEvent *event);
            void wheelEvent(QWheelEvent *event);
            void mousePressEvent(QMouseEvent *event);
            void mouseMoveEvent(QMouseEvent *event);
            void mouseReleaseEvent(QMouseEvent *event);

        private slots:
            void updatePixmap(const QImage &image, double scaleFactor);

        private:
            void zoom(double zoomFactor);
            void scroll(int deltaX, int deltaY);

            RenderThread thread;
            QPixmap pixmap;
            QPoint pixmapOffset;
            QPoint lastDragPos;
            double centerX;
            double centerY;
            double pixmapScale;
            double curScale;
        };

        #endif