87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** You may use this file under the terms of the BSD license as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
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** of its contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef ARROW_H
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#define ARROW_H
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#include <QGraphicsLineItem>
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#include "diagramitem.h"
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QT_BEGIN_NAMESPACE
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class QGraphicsPolygonItem;
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class QGraphicsLineItem;
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class QGraphicsScene;
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class QRectF;
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class QGraphicsSceneMouseEvent;
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class QPainterPath;
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QT_END_NAMESPACE
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//! [0]
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class Arrow : public QGraphicsLineItem
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{
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public:
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enum { Type = UserType + 4 };
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Arrow(DiagramItem *startItem, DiagramItem *endItem,
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QGraphicsItem *parent = 0);
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int type() const { return Type; }
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QRectF boundingRect() const;
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QPainterPath shape() const;
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void setColor(const QColor &color) { myColor = color; }
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DiagramItem *startItem() const { return myStartItem; }
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DiagramItem *endItem() const { return myEndItem; }
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void updatePosition();
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protected:
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
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private:
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DiagramItem *myStartItem;
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DiagramItem *myEndItem;
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QColor myColor;
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QPolygonF arrowHead;
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};
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//! [0]
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#endif // ARROW_H
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