Ignore:
Timestamp:
May 5, 2011, 5:36:53 AM (14 years ago)
Author:
Dmitry A. Kuminov
Message:

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.

Location:
trunk
Files:
2 edited

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Unmodified
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  • trunk

  • trunk/examples/graphicsview/elasticnodes/node.cpp

    r651 r846  
    11/****************************************************************************
    22**
    3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
     3** Copyright (C) 201 Nokia Corporation and/or its subsidiary(-ies).
    44** All rights reserved.
    55** Contact: Nokia Corporation ([email protected])
    … …  
    77** This file is part of the examples of the Qt Toolkit.
    88**
    9 ** $QT_BEGIN_LICENSE:LGPL$
    10 ** Commercial Usage
    11 ** Licensees holding valid Qt Commercial licenses may use this file in
    12 ** accordance with the Qt Commercial License Agreement provided with the
    13 ** Software or, alternatively, in accordance with the terms contained in
    14 ** a written agreement between you and Nokia.
    15 **
    16 ** GNU Lesser General Public License Usage
    17 ** Alternatively, this file may be used under the terms of the GNU Lesser
    18 ** General Public License version 2.1 as published by the Free Software
    19 ** Foundation and appearing in the file LICENSE.LGPL included in the
    20 ** packaging of this file.  Please review the following information to
    21 ** ensure the GNU Lesser General Public License version 2.1 requirements
    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    23 **
    24 ** In addition, as a special exception, Nokia gives you certain additional
    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception
    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
    27 **
    28 ** GNU General Public License Usage
    29 ** Alternatively, this file may be used under the terms of the GNU
    30 ** General Public License version 3.0 as published by the Free Software
    31 ** Foundation and appearing in the file LICENSE.GPL included in the
    32 ** packaging of this file.  Please review the following information to
    33 ** ensure the GNU General Public License version 3.0 requirements will be
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    36 ** If you have questions regarding the use of this file, please contact
    37 ** Nokia at [email protected].
     9** $QT_BEGIN_LICENSE:BSD$
     10** You may use this file under the terms of the BSD license as follows:
     11**
     12** "Redistribution and use in source and binary forms, with or without
     13** modification, are permitted provided that the following conditions are
     14** met:
     15**   * Redistributions of source code must retain the above copyright
     16**     notice, this list of conditions and the following disclaimer.
     17**   * Redistributions in binary form must reproduce the above copyright
     18**     notice, this list of conditions and the following disclaimer in
     19**     the documentation and/or other materials provided with the
     20**     distribution.
     21**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
     22**     the names of its contributors may be used to endorse or promote
     23**     products derived from this software without specific prior written
     24**     permission.
     25**
     26** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     27** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     28** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     29** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     30** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     31** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     32** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     33** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     34** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     35** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     36** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
    3837** $QT_END_LICENSE$
    3938**
    … …  
    4948#include "graphwidget.h"
    5049
     50
    5151Node::Node(GraphWidget *graphWidget)
    5252    : graph(graphWidget)
    … …  
    5757    setZValue(-1);
    5858}
    59 
     59//! [0]
     60
     61//! [1]
    6062void Node::addEdge(Edge *edge)
    6163{
    … …  
    6870    return edgeList;
    6971}
    70 
     72//! [1]
     73
     74//! [2]
    7175void Node::calculateForces()
    7276{
    … …  
    7579        return;
    7680    }
    77    
     81//! [2]
     82
     83//! [3]
    7884    // Sum up all forces pushing this item away
    7985    qreal xvel = 0;
    … …  
    8490            continue;
    8591
    86         QLineF line(mapFromItem(node, 0, 0), QPointF(0, 0));
    87         qreal dx = line.dx();
    88         qreal dy = line.dy();
     92        Q);
     93        qreal dx = x();
     94        qreal dy = y();
    8995        double l = 2.0 * (dx * dx + dy * dy);
    9096        if (l > 0) {
    … …  
    9399        }
    94100    }
    95 
     101//! [3]
     102
     103//! [4]
    96104    // Now subtract all forces pulling items together
    97105    double weight = (edgeList.size() + 1) * 10;
    98106    foreach (Edge *edge, edgeList) {
    99         QPointF pos;
     107        QPointF ;
    100108        if (edge->sourceNode() == this)
    101             pos = mapFromItem(edge->destNode(), 0, 0);
     109            Item(edge->destNode(), 0, 0);
    102110        else
    103             pos = mapFromItem(edge->sourceNode(), 0, 0);
    104         xvel += pos.x() / weight;
    105         yvel += pos.y() / weight;
    106     }
    107    
     111            vec = mapToItem(edge->sourceNode(), 0, 0);
     112        xvel -= vec.x() / weight;
     113        yvel -= vec.y() / weight;
     114    }
     115//! [4]
     116
     117//! [5]
    108118    if (qAbs(xvel) < 0.1 && qAbs(yvel) < 0.1)
    109119        xvel = yvel = 0;
    110 
     120//! [5]
     121
     122//! [6]
    111123    QRectF sceneRect = scene()->sceneRect();
    112124    newPos = pos() + QPointF(xvel, yvel);
    … …  
    114126    newPos.setY(qMin(qMax(newPos.y(), sceneRect.top() + 10), sceneRect.bottom() - 10));
    115127}
    116 
     128//! [6]
     129
     130//! [7]
    117131bool Node::advance()
    118132{
    … …  
    123137    return true;
    124138}
    125 
     139//! [7]
     140
     141//! [8]
    126142QRectF Node::boundingRect() const
    127143{
    … …  
    130146                  23 + adjust, 23 + adjust);
    131147}
    132 
     148//! [8]
     149
     150//! [9]
    133151QPainterPath Node::shape() const
    134152{
    … …  
    137155    return path;
    138156}
    139 
     157//! [9]
     158
     159//! [10]
    140160void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *)
    141161{
    … …  
    158178    painter->drawEllipse(-10, -10, 20, 20);
    159179}
    160 
     180//! [10]
     181
     182//! [11]
    161183QVariant Node::itemChange(GraphicsItemChange change, const QVariant &value)
    162184{
    … …  
    173195    return QGraphicsItem::itemChange(change, value);
    174196}
    175 
     197//! [11]
     198
     199//! [12]
    176200void Node::mousePressEvent(QGraphicsSceneMouseEvent *event)
    177201{
    … …  
    185209    QGraphicsItem::mouseReleaseEvent(event);
    186210}
     211
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