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    41 

    42 #ifndef ENVIRONMENT_H

    43 #define ENVIRONMENT_H

    44 

    45 #include <qobject.h>

    46 #include <qlist.h>

    47 #include <qhash.h>

    48 #include <QTimerEvent>

    49 #include <QMouseEvent>

    50 #include <QKeyEvent>

    51 #include <QScriptEngine>

    52 #include <QScriptable>

    53 class QContext2DCanvas;

    54 

    55 //! [0]

    56 class Environment : public QObject

    57 {

    58     Q_OBJECT

    59     Q_PROPERTY(QScriptValue document READ document)

    60 public:

    61     Environment(QObject *parent = 0);

    62     ~Environment();

    63 

    64     QScriptValue document() const;

    65 

    66     void addCanvas(QContext2DCanvas *canvas);

    67     QContext2DCanvas *canvasByName(const QString &name) const;

    68     QList<QContext2DCanvas*> canvases() const;

    69 

    70     QScriptValue evaluate(const QString &code,

    71                           const QString &fileName = QString());

    72 

    73     QScriptValue toWrapper(QObject *object);

    74 

    75     void handleEvent(QContext2DCanvas *canvas, QMouseEvent *e);

    76     void handleEvent(QContext2DCanvas *canvas, QKeyEvent *e);

    77 

    78     void reset();

    79 //! [0]

    80 

    81     QScriptEngine *engine() const;

    82 

    83 //! [1]

    84 public slots:

    85     int setInterval(const QScriptValue &expression, int delay);

    86     void clearInterval(int timerId);

    87 

    88     int setTimeout(const QScriptValue &expression, int delay);

    89     void clearTimeout(int timerId);

    90 //! [1]

    91 

    92 //! [2]

    93 signals:

    94     void scriptError(const QScriptValue &error);

    95 //! [2]

    96 

    97 protected:

    98     void timerEvent(QTimerEvent *event);

    99 

   100 private:

   101     QScriptValue eventHandler(QContext2DCanvas *canvas,

   102                               const QString &type, QScriptValue *who);

   103     QScriptValue newFakeDomEvent(const QString &type,

   104                                  const QScriptValue &target);

   105     void maybeEmitScriptError();

   106 

   107     QScriptEngine *m_engine;

   108     QScriptValue m_originalGlobalObject;

   109     QScriptValue m_document;

   110     QList<QContext2DCanvas*> m_canvases;

   111     QHash<int, QScriptValue> m_intervalHash;

   112     QHash<int, QScriptValue> m_timeoutHash;

   113 };

   114 

   115 //! [3]

   116 class Document : public QObject

   117 {

   118     Q_OBJECT

   119 public:

   120     Document(Environment *env);

   121     ~Document();

   122 

   123 public slots:

   124     QScriptValue getElementById(const QString &id) const;

   125     QScriptValue getElementsByTagName(const QString &name) const;

   126 

   127     // EventTarget

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

   129                           bool useCapture);

   130 };

   131 //! [3]

   132 

   133 class CanvasGradientPrototype : public QObject, public QScriptable

   134 {

   135     Q_OBJECT

   136 protected:

   137     CanvasGradientPrototype(QObject *parent = 0);

   138 public:

   139     static void setup(QScriptEngine *engine);

   140 

   141 public slots:

   142     void addColorStop(qreal offset, const QString &color);

   143 };

   144 

   145 #endif