/**************************************************************************** ** ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** 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: ** ** "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 Digia Plc 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 "mimedata.h" #include "sourcewidget.h" SourceWidget::SourceWidget(QWidget *parent) : QWidget(parent) { QFile imageFile(":/images/example.svg"); imageFile.open(QIODevice::ReadOnly); imageData = imageFile.readAll(); imageFile.close(); QScrollArea *imageArea = new QScrollArea; imageLabel = new QSvgWidget; imageLabel->renderer()->load(imageData); imageArea->setWidget(imageLabel); //imageLabel->setMinimumSize(imageLabel->renderer()->viewBox().size()); QLabel *instructTopLabel = new QLabel(tr("This is an SVG drawing:")); QLabel *instructBottomLabel = new QLabel( tr("Drag the icon to copy the drawing as a PNG file:")); instructBottomLabel->setWordWrap(true); QPushButton *dragIcon = new QPushButton(tr("Export")); dragIcon->setIcon(QIcon(":/images/drag.png")); connect(dragIcon, SIGNAL(pressed()), this, SLOT(startDrag())); QGridLayout *layout = new QGridLayout; layout->addWidget(instructTopLabel, 0, 0, 1, 2); layout->addWidget(imageArea, 1, 0, 2, 2); layout->addWidget(instructBottomLabel, 3, 0); layout->addWidget(dragIcon, 3, 1); setLayout(layout); setWindowTitle(tr("Delayed Encoding")); } //![1] void SourceWidget::createData(const QString &mimeType) { if (mimeType != "image/png") return; QImage image(imageLabel->size(), QImage::Format_RGB32); QPainter painter; painter.begin(&image); imageLabel->renderer()->render(&painter); painter.end(); QByteArray data; QBuffer buffer(&data); buffer.open(QIODevice::WriteOnly); image.save(&buffer, "PNG"); buffer.close(); mimeData->setData("image/png", data); } //![1] //![0] void SourceWidget::startDrag() { mimeData = new MimeData; connect(mimeData, SIGNAL(dataRequested(QString)), this, SLOT(createData(QString)), Qt::DirectConnection); QDrag *drag = new QDrag(this); drag->setMimeData(mimeData); drag->setPixmap(QPixmap(":/images/drag.png")); drag->exec(Qt::CopyAction); } //![0]