/**************************************************************************** ** ** 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 #include #include #include #include #include #include #include #include /* 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]