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Diffstat (limited to 'examples/widgets/graphicsview/elasticnodes/node.h')
-rw-r--r-- | examples/widgets/graphicsview/elasticnodes/node.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/examples/widgets/graphicsview/elasticnodes/node.h b/examples/widgets/graphicsview/elasticnodes/node.h new file mode 100644 index 0000000000..86ca407e08 --- /dev/null +++ b/examples/widgets/graphicsview/elasticnodes/node.h @@ -0,0 +1,85 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef NODE_H +#define NODE_H + +#include <QGraphicsItem> +#include <QList> + +class Edge; +class GraphWidget; +QT_BEGIN_NAMESPACE +class QGraphicsSceneMouseEvent; +QT_END_NAMESPACE + +//! [0] +class Node : public QGraphicsItem +{ +public: + Node(GraphWidget *graphWidget); + + void addEdge(Edge *edge); + QList<Edge *> edges() const; + + enum { Type = UserType + 1 }; + int type() const { return Type; } + + void calculateForces(); + bool advance(); + + QRectF boundingRect() const; + QPainterPath shape() const; + void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget); + +protected: + QVariant itemChange(GraphicsItemChange change, const QVariant &value); + + void mousePressEvent(QGraphicsSceneMouseEvent *event); + void mouseReleaseEvent(QGraphicsSceneMouseEvent *event); + +private: + QList<Edge *> edgeList; + QPointF newPos; + GraphWidget *graph; +}; +//! [0] + +#endif |