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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 documentation 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 <QtGui>
#include "window.h"
MyWidget::MyWidget(QWidget *parent)
: QWidget(parent)
{
QLabel *textLabel = new QLabel(tr("Data:"), this);
dataLabel = new QLabel(this);
dataLabel->setFixedSize(200, 200);
QVBoxLayout *layout = new QVBoxLayout(this);
layout->addWidget(textLabel);
layout->addWidget(dataLabel);
setAcceptDrops(true);
setWindowTitle(tr("Drop Events"));
}
//! [0]
void MyWidget::dragEnterEvent(QDragEnterEvent *event)
{
if (event->mimeData()->hasText() || event->mimeData()->hasImage())
event->acceptProposedAction();
}
//! [0]
//! [1]
void MyWidget::dropEvent(QDropEvent *event)
{
if (event->mimeData()->hasText())
dataLabel->setText(event->mimeData()->text());
else if (event->mimeData()->hasImage()) {
QVariant imageData = event->mimeData()->imageData();
dataLabel->setPixmap(qvariant_cast<QPixmap>(imageData));
}
event->acceptProposedAction();
}
//! [1]
//! [2]
void MyWidget::mousePressEvent(QMouseEvent *event)
{
//! [2]
QString text = dataLabel->text();
QPixmap iconPixmap(32, 32);
iconPixmap.fill(qRgba(255, 0, 0, 127));
QImage image(100, 100, QImage::Format_RGB32);
image.fill(qRgb(0, 0, 255));
//! [3]
if (event->button() == Qt::LeftButton) {
QDrag *drag = new QDrag(this);
QMimeData *mimeData = new QMimeData;
mimeData->setText(text);
mimeData->setImageData(image);
drag->setMimeData(mimeData);
drag->setPixmap(iconPixmap);
Qt::DropAction dropAction = drag->exec();
//! [3]
// ...
//! [4]
event->accept();
}
//! [4]
else if (event->button() == Qt::MidButton) {
QDrag *drag = new QDrag(this);
QMimeData *mimeData = new QMimeData;
mimeData->setImageData(image);
drag->setMimeData(mimeData);
drag->setPixmap(iconPixmap);
Qt::DropAction dropAction = drag->exec();
// ...
event->accept();
}
//! [5]
}
//! [5]
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