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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (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 http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#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]
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