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renderarea.h Example File
painting/transformations/renderarea.h

/****************************************************************************
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** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
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** Licensees holding valid Qt Preview licenses may use this file in
** accordance with the Qt Preview License Agreement provided with the
** Software.
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#ifndef RENDERAREA_H
#define RENDERAREA_H

#include <QFont>
#include <QList>
#include <QPainterPath>
#include <QRect>
#include <QWidget>

class QPaintEvent;

enum Operation { NoTransformation, Translate, Rotate, Scale };

class RenderArea : public QWidget
{
    Q_OBJECT

public:
    RenderArea(QWidget *parent = 0);

    void setOperations(const QList<Operation> &operations);
    void setShape(const QPainterPath &shape);

    QSize minimumSizeHint() const;
    QSize sizeHint() const;

protected:
    void paintEvent(QPaintEvent *event);

private:
    void drawCoordinates(QPainter &painter);
    void drawOutline(QPainter &painter);
    void drawShape(QPainter &painter);
    void transformPainter(QPainter &painter);

    QList<Operation> operations;
    QPainterPath shape;
    QRect xBoundingRect;
    QRect yBoundingRect;
};

#endif


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Qt 4.2.0-rc1