Qt:Документация 4.3.2/graphicsview-diagramscene-arrow-h
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[править] arrow.h Example File
graphicsview/diagramscene/arrow.h
/**************************************************************************** ** ** Copyright (C) 2007-2007 Trolltech ASA. All rights reserved. ** ** This file is part of the example classes of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 as published by the Free Software Foundation ** and appearing in the file LICENSE.GPL included in the packaging of ** this file. Please review the following information to ensure GNU ** General Public Licensing requirements will be met: ** http://trolltech.com/products/qt/licenses/licensing/opensource/ ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http://trolltech.com/products/qt/licenses/licensing/licensingoverview ** or contact the sales department at sales@trolltech.com. ** ** In addition, as a special exception, Trolltech gives you certain ** additional rights. These rights are described in the Trolltech GPL ** Exception version 1.0, which can be found at ** http://www.trolltech.com/products/qt/gplexception/ and in the file ** GPL_EXCEPTION.txt in this package. ** ** In addition, as a special exception, Trolltech, as the sole copyright ** holder for Qt Designer, grants users of the Qt/Eclipse Integration ** plug-in the right for the Qt/Eclipse Integration to link to ** functionality provided by Qt Designer and its related libraries. ** ** Trolltech reserves all rights not expressly granted herein. ** ** Trolltech ASA (c) 2007 ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #ifndef ARROW_H #define ARROW_H #include <QGraphicsLineItem> #include "diagramitem.h" class QGraphicsPolygonItem; class QGraphicsLineItem; class QGraphicsScene; class QRectF; class QGraphicsSceneMouseEvent; class QPainterPath; class Arrow : public QGraphicsLineItem { public: enum { Type = UserType + 4 }; Arrow(DiagramItem *startItem, DiagramItem *endItem, QGraphicsItem *parent = 0, QGraphicsScene *scene = 0); int type() const { return Type; } QRectF boundingRect() const; QPainterPath shape() const; void setColor(const QColor &color) { myColor = color; } DiagramItem *startItem() const { return myStartItem; } DiagramItem *endItem() const { return myEndItem; } public slots: void updatePosition(); protected: void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0); private: DiagramItem *myStartItem; DiagramItem *myEndItem; QColor myColor; QPolygonF arrowHead; }; #endif
Copyright © 2007 Trolltech | Trademarks | Qt 4.3.2
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