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    41 

    42 #ifndef QCONTEXT2DCANVAS_H

    43 #define QCONTEXT2DCANVAS_H

    44 

    45 #include <qscriptengine.h>

    46 #include <qscriptcontext.h>

    47 #include <qscriptvalue.h>

    48 

    49 #include <QWidget>

    50 

    51 QT_BEGIN_NAMESPACE

    52 class QPaintEvent;

    53 class QResizeEvent;

    54 class QMouseEvent;

    55 class QKeyEvent;

    56 QT_END_NAMESPACE

    57 class Environment;

    58 class Context2D;

    59 

    60 //! [0]

    61 class QContext2DCanvas : public QWidget

    62 {

    63     Q_OBJECT

    64 public:

    65     QContext2DCanvas(Context2D *context, Environment *env, QWidget *parent = 0);

    66     ~QContext2DCanvas();

    67 

    68     Context2D *context() const;

    69     void reset();

    70 

    71 public slots:

    72     QScriptValue getContext(const QString &str);

    73     void resize(int width, int height);

    74 

    75     // EventTarget

    76     void addEventListener(const QString &type, const QScriptValue &listener,

    77                           bool useCapture);

    78 

    79 protected:

    80     virtual void paintEvent(QPaintEvent *e);

    81     virtual void mouseMoveEvent(QMouseEvent *e);

    82     virtual void mousePressEvent(QMouseEvent *e);

    83     virtual void mouseReleaseEvent(QMouseEvent *e);

    84     virtual void keyPressEvent(QKeyEvent *e);

    85     virtual void keyReleaseEvent(QKeyEvent *e);

    86     virtual void resizeEvent(QResizeEvent *e);

    87 

    88 private slots:

    89     void contentsChanged(const QImage &image);

    90 //! [0]

    91 

    92 private:

    93     Context2D *m_context;

    94     Environment *m_env;

    95     QImage m_image;

    96 };

    97 

    98 #endif