qcontext2dcanvas.cpp Example File
script/context2d/qcontext2dcanvas.cpp
#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);
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);
}
}