Qt Reference Documentation

node.cpp Example File

animation/stickman/node.cpp
 /****************************************************************************
 **
 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation ([email protected])
 **
 ** This file is part of the QtCore module 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 Nokia Corporation 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 "node.h"
 #include "stickman.h"

 #include <QRectF>
 #include <QPainter>
 #include <QGraphicsSceneMouseEvent>

 Node::Node(const QPointF &pos, QGraphicsItem *parent)
   : QGraphicsObject(parent), m_dragging(false)
 {
     setPos(pos);
     setFlag(QGraphicsItem::ItemSendsGeometryChanges);
 }

 Node::~Node()
 {
 }

 QRectF Node::boundingRect() const
 {
     return QRectF(-6.0, -6.0, 12.0, 12.0);
 }

 void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
 {
     painter->setPen(Qt::white);
     painter->drawEllipse(QPointF(0.0, 0.0), 5.0, 5.0);
 }

 QVariant Node::itemChange(GraphicsItemChange change, const QVariant &value)
 {
     if (change == QGraphicsItem::ItemPositionChange)
         emit positionChanged();

     return QGraphicsObject::itemChange(change, value);
 }

 void Node::mousePressEvent(QGraphicsSceneMouseEvent *)
 {
     m_dragging = true;
 }

 void Node::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 {
     if (m_dragging)
         setPos(mapToParent(event->pos()));
 }

 void Node::mouseReleaseEvent(QGraphicsSceneMouseEvent *)
 {
     m_dragging = false;
 }
X

Thank you for giving your feedback.

Make sure it is related to this specific page. For more general bugs and requests, please use the Qt Bug Tracker.