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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
** the names of its contributors may be used to endorse or promote
** products derived from this software without specific prior written
** permission.
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qdeclarativeextensionplugin.h>
#include <qdeclarativeengine.h>
#include <qdeclarativecontext.h>
#include <qdeclarative.h>
#include <qdeclarativeitem.h>
#include <qdeclarativeimageprovider.h>
#include <qdeclarativeview.h>
#include <QImage>
#include <QPainter>
/*
This example illustrates using a QDeclarativeImageProvider to serve
images asynchronously.
*/
//![0]
class ColorImageProvider : public QDeclarativeImageProvider
{
public:
// This is run in a low priority thread.
QImage request(const QString &id, QSize *size, const QSize &req_size)
{
if (size) *size = QSize(100,50);
QImage image(
req_size.width() > 0 ? req_size.width() : 100,
req_size.height() > 0 ? req_size.height() : 50,
QImage::Format_RGB32);
image.fill(QColor(id).rgba());
QPainter p(&image);
QFont f = p.font();
f.setPixelSize(30);
p.setFont(f);
p.setPen(Qt::black);
if (req_size.isValid())
p.scale(req_size.width()/100.0, req_size.height()/50.0);
p.drawText(QRectF(0,0,100,50),Qt::AlignCenter,id);
return image;
}
};
class ImageProviderExtensionPlugin : public QDeclarativeExtensionPlugin
{
Q_OBJECT
public:
void registerTypes(const char *uri) {
Q_UNUSED(uri);
}
void initializeEngine(QDeclarativeEngine *engine, const char *uri) {
Q_UNUSED(uri);
engine->addImageProvider("colors", new ColorImageProvider);
QStringList dataList;
dataList.append("image://colors/red");
dataList.append("image://colors/green");
dataList.append("image://colors/blue");
dataList.append("image://colors/brown");
dataList.append("image://colors/orange");
dataList.append("image://colors/purple");
dataList.append("image://colors/yellow");
QDeclarativeContext *ctxt = engine->rootContext();
ctxt->setContextProperty("myModel", QVariant::fromValue(dataList));
}
};
#include "imageprovider.moc"
Q_EXPORT_PLUGIN(ImageProviderExtensionPlugin);
//![0]
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