qcontext2dcanvas.cpp Example File

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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);
      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);
      }
  }