Qt 4.6: qcontext2dcanvas.h Example File (script/context2d/qcontext2dcanvas.h)

|  | Home · All Classes · Overviews |

# qcontext2dcanvas.h Example File
script/context2d/qcontext2dcanvas.h

     /****************************************************************************
     **
     ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** No Commercial Usage
     ** This file contains pre-release code and may not be distributed.
     ** You may use this file in accordance with the terms and conditions
     ** contained in the Technology Preview License Agreement accompanying
     ** this package.
     **
     ** 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 1.1, included in the file LGPL_EXCEPTION.txt in this
     ** package.
     **
     ** If you have questions regarding the use of this file, please contact
     ** Nokia at qt-info@nokia.com.
     **
     **
     **
     **
     **
     **
     **
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #ifndef QCONTEXT2DCANVAS_H
     #define QCONTEXT2DCANVAS_H

     #include <qscriptengine.h>
     #include <qscriptcontext.h>
     #include <qscriptvalue.h>

     #include <QWidget>

     class QPaintEvent;
     class QResizeEvent;
     class QMouseEvent;
     class QKeyEvent;

     class Environment;
     class Context2D;

     class QContext2DCanvas : public QWidget
     {
         Q_OBJECT
     public:
         QContext2DCanvas(Context2D *context, Environment *env, QWidget *parent = 0);
         ~QContext2DCanvas();

         Context2D *context() const;
         void reset();

     public slots:
         QScriptValue getContext(const QString &str);
         void resize(int width, int height);

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

     protected:
         virtual void paintEvent(QPaintEvent *e);
         virtual void mouseMoveEvent(QMouseEvent *e);
         virtual void mousePressEvent(QMouseEvent *e);
         virtual void mouseReleaseEvent(QMouseEvent *e);
         virtual void keyPressEvent(QKeyEvent *e);
         virtual void keyReleaseEvent(QKeyEvent *e);
         virtual void resizeEvent(QResizeEvent *e);

     private slots:
         void contentsChanged(const QImage &image);

     private:
         Context2D *m_context;
         Environment *m_env;
         QImage m_image;
     };

     #endif