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/****************************************************************************
**
** Copyright (C) 2014 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*
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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