Home · All Namespaces · All Classes · Main Classes · Grouped Classes · Modules · Functions

environment.h Example File
script/context2d/environment.h

 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 ** Contact: Qt Software Information ([email protected])
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 2.1 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU Lesser General Public License version 2.1 requirements
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** In addition, as a special exception, Nokia gives you certain
 ** additional rights. These rights are described in the Nokia Qt LGPL
 ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
 ** package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 3.0 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.GPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU General Public License version 3.0 requirements will be
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you are unsure which license is appropriate for your use, please
 ** contact the sales department at [email protected].
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #ifndef ENVIRONMENT_H
 #define ENVIRONMENT_H

 #include <qobject.h>
 #include <qlist.h>
 #include <qhash.h>
 #include <QTimerEvent>
 #include <QMouseEvent>
 #include <QKeyEvent>
 #include <QScriptEngine>
 #include <QScriptable>
 class QContext2DCanvas;

 class Environment : public QObject
 {
     Q_OBJECT
     Q_PROPERTY(QScriptValue document READ document)
 public:
     Environment(QObject *parent = 0);
     ~Environment();

     QScriptValue document() const;

     void addCanvas(QContext2DCanvas *canvas);
     QContext2DCanvas *canvasByName(const QString &name) const;
     QList<QContext2DCanvas*> canvases() const;

     QScriptValue evaluate(const QString &code,
                           const QString &fileName = QString());

     QScriptValue toWrapper(QObject *object);

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

     void reset();

     QScriptEngine *engine() const;

 public slots:
     int setInterval(const QScriptValue &expression, int delay);
     void clearInterval(int timerId);

     int setTimeout(const QScriptValue &expression, int delay);
     void clearTimeout(int timerId);

 signals:
     void scriptError(const QScriptValue &error);

 protected:
     void timerEvent(QTimerEvent *event);

 private:
     QScriptValue eventHandler(QContext2DCanvas *canvas,
                               const QString &type, QScriptValue *who);
     QScriptValue newFakeDomEvent(const QString &type,
                                  const QScriptValue &target);
     void maybeEmitScriptError();

     QScriptEngine *m_engine;
     QScriptValue m_originalGlobalObject;
     QScriptValue m_document;
     QList<QContext2DCanvas*> m_canvases;
     QHash<int, QScriptValue> m_intervalHash;
     QHash<int, QScriptValue> m_timeoutHash;
 };

 class Document : public QObject
 {
     Q_OBJECT
 public:
     Document(Environment *env);
     ~Document();

 public slots:
     QScriptValue getElementById(const QString &id) const;
     QScriptValue getElementsByTagName(const QString &name) const;

     // EventTarget
     void addEventListener(const QString &type, const QScriptValue &listener,
                           bool useCapture);
 };

 class CanvasGradientPrototype : public QObject, public QScriptable
 {
     Q_OBJECT
 protected:
     CanvasGradientPrototype(QObject *parent = 0);
 public:
     static void setup(QScriptEngine *engine);

 public slots:
     void addColorStop(qreal offset, const QString &color);
 };

 #endif


Copyright © 2009 Nokia Corporation and/or its subsidiary(-ies) Trademarks
Qt 4.5.1