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50
51#ifndef QCONTEXT2DCANVAS_H
52#define QCONTEXT2DCANVAS_H
53
54#include <qscriptengine.h>
55#include <qscriptcontext.h>
56#include <qscriptvalue.h>
57
58#include <QWidget>
59
60QT_BEGIN_NAMESPACE
61class QPaintEvent;
62class QResizeEvent;
63class QMouseEvent;
64class QKeyEvent;
65QT_END_NAMESPACE
66class Environment;
67class Context2D;
68
69//! [0]
70class QContext2DCanvas : public QWidget
71{
72 Q_OBJECT
73public:
74 QContext2DCanvas(Context2D *context, Environment *env, QWidget *parent = 0);
75 ~QContext2DCanvas();
76
77 Context2D *context() const;
78 void reset();
79
80public slots:
81 QScriptValue getContext(const QString &str);
82 void resize(int width, int height);
83
84 // EventTarget
85 void addEventListener(const QString &type, const QScriptValue &listener,
86 bool useCapture);
87
88protected:
89 virtual void paintEvent(QPaintEvent *e);
90 virtual void mouseMoveEvent(QMouseEvent *e);
91 virtual void mousePressEvent(QMouseEvent *e);
92 virtual void mouseReleaseEvent(QMouseEvent *e);
93 virtual void keyPressEvent(QKeyEvent *e);
94 virtual void keyReleaseEvent(QKeyEvent *e);
95 virtual void resizeEvent(QResizeEvent *e);
96
97private slots:
98 void contentsChanged(const QImage &image);
99//! [0]
100
101private:
102 Context2D *m_context;
103 Environment *m_env;
104 QImage m_image;
105};
106
107#endif
108

source code of qtscript/examples/script/context2d/qcontext2dcanvas.h