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qcontext2dcanvas.cpp Example File
script/context2d/qcontext2dcanvas.cpp

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 #include "qcontext2dcanvas.h"

 #include "context2d.h"
 #include "environment.h"
 #include "domimage.h"

 #include <QPainter>
 #include <QPaintEvent>

 QContext2DCanvas::QContext2DCanvas(Context2D *context, Environment *env, QWidget *parent)
     : QWidget(parent), m_context(context), m_env(env)
 {
     QObject::connect(context, SIGNAL(changed(QImage)), this, SLOT(contentsChanged(QImage)));
     setMouseTracking(true);
 }

 QContext2DCanvas::~QContext2DCanvas()
 {
 }

 Context2D *QContext2DCanvas::context() const
 {
     return m_context;
 }

 QScriptValue QContext2DCanvas::getContext(const QString &str)
 {
     if (str != "2d")
         return QScriptValue();
     return m_env->toWrapper(m_context);
 }

 void QContext2DCanvas::contentsChanged(const QImage &image)
 {
     m_image = image;
     update();
 }

 void QContext2DCanvas::paintEvent(QPaintEvent *e)
 {
     QPainter p(this);
 #ifdef Q_WS_S60
 // Draw white rect first since in with some themes the js-file content will produce black-on-black.
     QBrush whiteBgBrush(Qt::white);
     p.fillRect(e->rect(), whiteBgBrush);
 #endif
     p.setClipRect(e->rect());
     p.drawImage(0, 0, m_image);
 }

 void QContext2DCanvas::mouseMoveEvent(QMouseEvent *e)
 {
     m_env->handleEvent(this, e);
 }

 void QContext2DCanvas::mousePressEvent(QMouseEvent *e)
 {
     m_env->handleEvent(this, e);
 }

 void QContext2DCanvas::mouseReleaseEvent(QMouseEvent *e)
 {
     m_env->handleEvent(this, e);
 }

 void QContext2DCanvas::keyPressEvent(QKeyEvent *e)
 {
     m_env->handleEvent(this, e);
 }

 void QContext2DCanvas::keyReleaseEvent(QKeyEvent *e)
 {
     m_env->handleEvent(this, e);
 }

 void QContext2DCanvas::resizeEvent(QResizeEvent *e)
 {
     m_context->setSize(e->size().width(), e->size().height());
 }

 void QContext2DCanvas::resize(int width, int height)
 {
     QWidget::resize(width, height);
 }

 void QContext2DCanvas::reset()
 {
     m_context->reset();
 }

 void QContext2DCanvas::addEventListener(const QString &type, const QScriptValue &listener,
                                         bool useCapture)
 {
     Q_UNUSED(useCapture);
     if (listener.isFunction()) {
         QScriptValue self = m_env->toWrapper(this);
         self.setProperty("on" + type, listener);
     }
 }