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/****************************************************************************
**
** Copyright (C) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
**
** This file is part of the documentation of the Qt Toolkit.
**
** Licensees holding a valid Qt License Agreement may use this file in
** accordance with the rights, responsibilities and obligations
** contained therein. Please consult your licensing agreement or
** contact [email protected] if any conditions of this licensing
** agreement are not clear to you.
**
** Further information about Qt licensing is available at:
** http://trolltech.com/products/appdev/licensing.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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****************************************************************************/
#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);
}
Copyright © 2008 Nokia Corporation and/or its subsidiary(-ies) | Trademarks | Qt 4.4.3 |