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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 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 the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef TABLETCANVAS_H
#define TABLETCANVAS_H
#include <QWidget>
#include <QImage>
#include <QPoint>
#include <QTabletEvent>
#include <QColor>
#include <QBrush>
#include <QPen>
#include <QPoint>
QT_BEGIN_NAMESPACE
class QPaintEvent;
class QString;
QT_END_NAMESPACE
//! [0]
class TabletCanvas : public QWidget
{
Q_OBJECT
public:
enum AlphaChannelType { AlphaPressure, AlphaTilt, NoAlpha };
enum ColorSaturationType { SaturationVTilt, SaturationHTilt,
SaturationPressure, NoSaturation };
enum LineWidthType { LineWidthPressure, LineWidthTilt, NoLineWidth };
TabletCanvas();
bool saveImage(const QString &file);
bool loadImage(const QString &file);
void setAlphaChannelType(AlphaChannelType type)
{ alphaChannelType = type; }
void setColorSaturationType(ColorSaturationType type)
{ colorSaturationType = type; }
void setLineWidthType(LineWidthType type)
{ lineWidthType = type; }
void setColor(const QColor &color)
{ myColor = color; }
QColor color() const
{ return myColor; }
void setTabletDevice(QTabletEvent::TabletDevice device)
{ myTabletDevice = device; }
int maximum(int a, int b)
{ return a > b ? a : b; }
protected:
void tabletEvent(QTabletEvent *event);
void paintEvent(QPaintEvent *event);
void resizeEvent(QResizeEvent *event);
private:
void initImage();
void paintImage(QPainter &painter, QTabletEvent *event);
Qt::BrushStyle brushPattern(qreal value);
void updateBrush(QTabletEvent *event);
AlphaChannelType alphaChannelType;
ColorSaturationType colorSaturationType;
LineWidthType lineWidthType;
QTabletEvent::PointerType pointerType;
QTabletEvent::TabletDevice myTabletDevice;
QColor myColor;
QImage image;
QBrush myBrush;
QPen myPen;
bool deviceDown;
QPoint polyLine[3];
};
//! [0]
#endif
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