Qt 4.8: domimage.cpp Example File (script/context2d/domimage.cpp)

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# domimage.cpp Example File

script/context2d/domimage.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
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     ** modification, are permitted provided that the following conditions are
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     **   * Redistributions of source code must retain the above copyright
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     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
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     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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     #include "domimage.h"

     #include <QVariant>

     #include <qscriptcontext.h>

     QScriptValue DomImage::s_self;

     DomImage::DomImage()
     {
     }

     int DomImage::width() const
     {
         return m_image.width();
     }

     int DomImage::height() const
     {
         return m_image.height();
     }

     QString DomImage::src() const
     {
         return m_src;
     }

     void DomImage::setSrc(const QString &src)
     {
         m_src = src;
         m_image = QImage(m_src);
     }

     QString DomImage::name() const
     {
         return m_src;
     }

     static QScriptValue Image(QScriptContext *context, QScriptEngine *env)
     {
         QScriptValue val = context->thisObject();
         DomImage *image = new DomImage();
         QScriptValue klass = env->newVariant(QVariant::fromValue(image));
         klass.setPrototype(DomImage::s_self);
         return klass;
     }

     static QScriptValue width(QScriptContext *context, QScriptEngine *)
     {
         QScriptValue val = context->thisObject();

         DomImage *image = qvariant_cast<DomImage*> (val.toVariant());
         if (image)
             return image->width();

         return 0;
     }

     static QScriptValue height(QScriptContext *context, QScriptEngine *)
     {
         QScriptValue val = context->thisObject();

         DomImage *image = qvariant_cast<DomImage*> (val.toVariant());
         if (image)
             return image->height();

         return 0;
     }

     static QScriptValue setSrc(QScriptContext *context, QScriptEngine *env)
     {
         QScriptValue val = context->thisObject();
         QString src  = context->argument(0).toString();

         DomImage *image = qvariant_cast<DomImage*> (val.toVariant());
         if (image)
             image->setSrc(src);

         return env->undefinedValue();
     }

     static QScriptValue name(QScriptContext *context, QScriptEngine *)
     {
         QScriptValue val = context->thisObject();

         DomImage *image = qvariant_cast<DomImage*> (val.toVariant());
         if (image)
             return image->name();

         return QString();
     }

     void DomImage::setup(QScriptEngine *e)
     {
         qRegisterMetaType<DomImage>();

         e->globalObject().setProperty("Image",
                                       e->newFunction(::Image, 0));

         s_self = e->newObject();
         s_self.setProperty("setSrc", e->newFunction(&::setSrc, 1));
         s_self.setProperty("width", e->newFunction(&::width));
         s_self.setProperty("height", e->newFunction(&::height));
         s_self.setProperty("name", e->newFunction(&::name));

         e->setDefaultPrototype(qMetaTypeId<DomImage>(), s_self);
     }