/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the examples of the Qt Toolkit.

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

#ifndef TABLETCANVAS_H

#define TABLETCANVAS_H

#include <QWidget>

#include <QPixmap>

#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 initPixmap();

    void paintPixmap(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;

    QPixmap pixmap;

    QBrush myBrush;

    QPen myPen;

    bool deviceDown;

    QPoint polyLine[3];

};

//! [0]

#endif