qt5base-lts/examples/painting/transformations/renderarea.h

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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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****************************************************************************/
#ifndef RENDERAREA_H
#define RENDERAREA_H
#include <QFont>
#include <QList>
#include <QPainterPath>
#include <QRect>
#include <QWidget>
QT_BEGIN_NAMESPACE
class QPaintEvent;
QT_END_NAMESPACE
//! [0]
enum Operation { NoTransformation, Translate, Rotate, Scale };
//! [0]
//! [1]
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);
//! [1]
//! [2]
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;
};
//! [2]
#endif