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Diffstat (limited to 'examples/declarative/imageprovider/imageprovider.cpp')
-rw-r--r-- | examples/declarative/imageprovider/imageprovider.cpp | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/examples/declarative/imageprovider/imageprovider.cpp b/examples/declarative/imageprovider/imageprovider.cpp new file mode 100644 index 0000000..011a63b --- /dev/null +++ b/examples/declarative/imageprovider/imageprovider.cpp @@ -0,0 +1,108 @@ +/**************************************************************************** +** +** 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + + +#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) { + QImage image(100, 50, QImage::Format_RGB32); + image.fill(QColor(id).rgba()); + QPainter p(&image); + p.setPen(Qt::black); + 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] + |