Alessandro Bonazzi
8c43d5cf2f
Files correlati : cg0.exe cg0700a.msk cg0700b.msk cg3.exe cg4.exe Bug : Commento: Merge 1.0 libraries
116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui>
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#include <QtSvg>
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#include "mimedata.h"
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#include "sourcewidget.h"
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SourceWidget::SourceWidget(QWidget *parent)
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: QWidget(parent)
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{
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QFile imageFile(":/images/example.svg");
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imageFile.open(QIODevice::ReadOnly);
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imageData = imageFile.readAll();
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imageFile.close();
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QScrollArea *imageArea = new QScrollArea;
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imageLabel = new QSvgWidget;
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imageLabel->renderer()->load(imageData);
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imageArea->setWidget(imageLabel);
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//imageLabel->setMinimumSize(imageLabel->renderer()->viewBox().size());
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QLabel *instructTopLabel = new QLabel(tr("This is an SVG drawing:"));
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QLabel *instructBottomLabel = new QLabel(
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tr("Drag the icon to copy the drawing as a PNG file:"));
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instructBottomLabel->setWordWrap(true);
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QPushButton *dragIcon = new QPushButton(tr("Export"));
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dragIcon->setIcon(QIcon(":/images/drag.png"));
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connect(dragIcon, SIGNAL(pressed()), this, SLOT(startDrag()));
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QGridLayout *layout = new QGridLayout;
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layout->addWidget(instructTopLabel, 0, 0, 1, 2);
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layout->addWidget(imageArea, 1, 0, 2, 2);
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layout->addWidget(instructBottomLabel, 3, 0);
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layout->addWidget(dragIcon, 3, 1);
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setLayout(layout);
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setWindowTitle(tr("Delayed Encoding"));
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}
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//![1]
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void SourceWidget::createData(const QString &mimeType)
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{
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if (mimeType != "image/png")
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return;
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QImage image(imageLabel->size(), QImage::Format_RGB32);
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QPainter painter;
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painter.begin(&image);
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imageLabel->renderer()->render(&painter);
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painter.end();
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QByteArray data;
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QBuffer buffer(&data);
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buffer.open(QIODevice::WriteOnly);
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image.save(&buffer, "PNG");
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buffer.close();
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mimeData->setData("image/png", data);
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}
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//![1]
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//![0]
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void SourceWidget::startDrag()
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{
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mimeData = new MimeData;
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connect(mimeData, SIGNAL(dataRequested(QString)),
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this, SLOT(createData(QString)), Qt::DirectConnection);
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QDrag *drag = new QDrag(this);
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drag->setMimeData(mimeData);
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drag->setPixmap(QPixmap(":/images/drag.png"));
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drag->exec(Qt::CopyAction);
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}
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//![0]
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