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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples 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.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "diagramscene.h"
#include "diagramitem.h"
DiagramScene::DiagramScene(QObject *parent)
: QGraphicsScene(parent)
{
movingItem = 0;
}
void DiagramScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
QPointF mousePos(event->buttonDownScenePos(Qt::LeftButton).x(),
event->buttonDownScenePos(Qt::LeftButton).y());
movingItem = itemAt(mousePos.x(), mousePos.y());
if (movingItem != 0 && event->button() == Qt::LeftButton) {
oldPos = movingItem->pos();
}
clearSelection();
QGraphicsScene::mousePressEvent(event);
}
void DiagramScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
if (movingItem != 0 && event->button() == Qt::LeftButton) {
if (oldPos != movingItem->pos())
emit itemMoved(qgraphicsitem_cast<DiagramItem *>(movingItem),
oldPos);
movingItem = 0;
}
QGraphicsScene::mouseReleaseEvent(event);
}
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