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     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

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

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    40 ****************************************************************************/

    41 

    42 #ifndef TABLETCANVAS_H

    43 #define TABLETCANVAS_H

    44 

    45 #include <QWidget>

    46 #include <QImage>

    47 #include <QPoint>

    48 #include <QTabletEvent>

    49 #include <QColor>

    50 #include <QBrush>

    51 #include <QPen>

    52 #include <QPoint>

    53 

    54 QT_BEGIN_NAMESPACE

    55 class QPaintEvent;

    56 class QString;

    57 QT_END_NAMESPACE

    58 

    59 //! [0]

    60 class TabletCanvas : public QWidget

    61 {

    62     Q_OBJECT

    63 

    64 public:

    65     enum AlphaChannelType { AlphaPressure, AlphaTilt, NoAlpha };

    66     enum ColorSaturationType { SaturationVTilt, SaturationHTilt,

    67                                SaturationPressure, NoSaturation };

    68     enum LineWidthType { LineWidthPressure, LineWidthTilt, NoLineWidth };

    69 

    70     TabletCanvas();

    71 

    72     bool saveImage(const QString &file);

    73     bool loadImage(const QString &file);

    74     void setAlphaChannelType(AlphaChannelType type)

    75         { alphaChannelType = type; }

    76     void setColorSaturationType(ColorSaturationType type)

    77         { colorSaturationType = type; }

    78     void setLineWidthType(LineWidthType type)

    79         { lineWidthType = type; }

    80     void setColor(const QColor &color)

    81         { myColor = color; }

    82     QColor color() const

    83         { return myColor; }

    84     void setTabletDevice(QTabletEvent::TabletDevice device)

    85         { myTabletDevice = device; }

    86     int maximum(int a, int b)

    87         { return a > b ? a : b; }

    88 

    89 protected:

    90     void tabletEvent(QTabletEvent *event);

    91     void paintEvent(QPaintEvent *event);

    92     void resizeEvent(QResizeEvent *event);

    93 

    94 private:

    95     void initImage();

    96     void paintImage(QPainter &painter, QTabletEvent *event);

    97     Qt::BrushStyle brushPattern(qreal value);

    98     void updateBrush(QTabletEvent *event);

    99 

   100     AlphaChannelType alphaChannelType;

   101     ColorSaturationType colorSaturationType;

   102     LineWidthType lineWidthType;

   103     QTabletEvent::PointerType pointerType;

   104     QTabletEvent::TabletDevice myTabletDevice;

   105     QColor myColor;

   106 

   107     QImage image;

   108     QBrush myBrush;

   109     QPen myPen;

   110     bool deviceDown;

   111     QPoint polyLine[3];

   112 };

   113 //! [0]

   114 

   115 #endif