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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples 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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtSvg>
+#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:"));
+ 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(const QString &)),
+ this, SLOT(createData(const QString &)), Qt::DirectConnection);
+
+ QDrag *drag = new QDrag(this);
+ drag->setMimeData(mimeData);
+ drag->setPixmap(QPixmap(":/images/drag.png"));
+
+ drag->exec(Qt::CopyAction);
+}
+//![0]
+