1 files changed, 115 insertions, 0 deletions
diff --git a/examples/svg/draganddrop/delayedencoding/sourcewidget.cpp b/examples/svg/draganddrop/delayedencoding/sourcewidget.cpp
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+++ b/examples/svg/draganddrop/delayedencoding/sourcewidget.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 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 <QtWidgets>
+#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:"));
+    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]
+