tabletcanvas.h Example File

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#ifndef TABLETCANVAS_H #define TABLETCANVAS_H #include <QWidget> #include <QPixmap> #include <QPoint> #include <QTabletEvent> #include <QColor> #include <QBrush> #include <QPen> #include <QPoint> class QPaintEvent; class QString; class TabletCanvas : public QWidget { Q_OBJECT public: enum Valuator { PressureValuator, TangentialPressureValuator, TiltValuator, VTiltValuator, HTiltValuator, NoValuator }; Q_ENUM(Valuator) TabletCanvas(); bool saveImage(const QString &file); bool loadImage(const QString &file); void setAlphaChannelValuator(Valuator type) { m_alphaChannelValuator = type; } void setColorSaturationValuator(Valuator type) { m_colorSaturationValuator = type; } void setLineWidthType(Valuator type) { m_lineWidthValuator = type; } void setColor(const QColor &c) { if (c.isValid()) m_color = c; } QColor color() const { return m_color; } void setTabletDevice(QTabletEvent *event) { updateCursor(event); } int maximum(int a, int b) { return a > b ? a : b; } protected: void tabletEvent(QTabletEvent *event) override; void paintEvent(QPaintEvent *event) override; void resizeEvent(QResizeEvent *event) override; private: void initPixmap(); void paintPixmap(QPainter &painter, QTabletEvent *event); Qt::BrushStyle brushPattern(qreal value); static qreal pressureToWidth(qreal pressure); void updateBrush(const QTabletEvent *event); void updateCursor(const QTabletEvent *event); Valuator m_alphaChannelValuator; Valuator m_colorSaturationValuator; Valuator m_lineWidthValuator; QColor m_color; QPixmap m_pixmap; QBrush m_brush; QPen m_pen; bool m_deviceDown; struct Point { QPointF pos; qreal pressure; qreal rotation; } lastPoint; }; #endif

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