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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]
+