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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 documentation 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*
finalwidget.cpp
A widget to display an image and a label containing a description.
*/
#include <QtGui>
#include "finalwidget.h"
FinalWidget::FinalWidget(QWidget *parent, const QString &name,
const QSize &labelSize)
: QFrame(parent)
{
hasImage = false;
imageLabel = new QLabel;
imageLabel->setFrameShadow(QFrame::Sunken);
imageLabel->setFrameShape(QFrame::StyledPanel);
imageLabel->setMinimumSize(labelSize);
nameLabel = new QLabel(name);
QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(imageLabel, 1);
layout->addWidget(nameLabel, 0);
setLayout(layout);
}
/*!
If the mouse moves far enough when the left mouse button is held down,
start a drag and drop operation.
*/
void FinalWidget::mouseMoveEvent(QMouseEvent *event)
{
if (!(event->buttons() & Qt::LeftButton))
return;
if ((event->pos() - dragStartPosition).manhattanLength()
< QApplication::startDragDistance())
return;
if (!hasImage)
return;
QDrag *drag = new QDrag(this);
QMimeData *mimeData = new QMimeData;
//! [0]
QByteArray output;
QBuffer outputBuffer(&output);
outputBuffer.open(QIODevice::WriteOnly);
imageLabel->pixmap()->toImage().save(&outputBuffer, "PNG");
mimeData->setData("image/png", output);
//! [0]
/*
//! [1]
mimeData->setImageData(QVariant(*imageLabel->pixmap()));
//! [1]
*/
drag->setMimeData(mimeData);
drag->setPixmap(imageLabel->pixmap()->scaled(64, 64, Qt::KeepAspectRatio));
//! [2]
drag->setHotSpot(QPoint(drag->pixmap().width()/2,
drag->pixmap().height()));
//! [2]
drag->start();
}
/*!
Check for left mouse button presses in order to enable drag and drop.
*/
void FinalWidget::mousePressEvent(QMouseEvent *event)
{
if (event->button() == Qt::LeftButton)
dragStartPosition = event->pos();
}
const QPixmap* FinalWidget::pixmap() const
{
return imageLabel->pixmap();
}
void FinalWidget::setPixmap(const QPixmap &pixmap)
{
imageLabel->setPixmap(pixmap);
hasImage = true;
}
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