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144 lines
3.8 KiB
144 lines
3.8 KiB
/***************************************************************************
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*
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* Copyright (C) 2005 Elad Lahav (elad_lahav@users.sourceforge.net)
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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
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* are met:
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*
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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT 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 OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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***************************************************************************/
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#ifndef GRAPHEDGE_H
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#define GRAPHEDGE_H
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#include <tqcanvas.h>
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class GraphNode;
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/**
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* Information used to draw arrow heads at the end of graph edges.
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*/
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struct ArrowInfo
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{
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/** The length of the arrow. */
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double m_dLength;
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/** The tangent of the arrow's angle from the main line. */
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double m_dTan;
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/** Holds the value sqrt(1 + dTan^2). */
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double m_dSqrt;
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};
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/**
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* Draws a directed edge on a canvas.
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* The edge is composed of a spline, which is its body, and a polygon, which
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* is its head.
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* @author Elad Lahav
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*/
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class GraphEdge : public TQCanvasPolygonalItem
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{
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public:
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GraphEdge(TQCanvas*, GraphNode*, GraphNode*);
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~GraphEdge();
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void setCallInfo(const TQString&, const TQString&, const TQString&);
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void setPoints(const TQPointArray&, const ArrowInfo&);
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TQString getTip() const;
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/**
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* @return The coordinates of the convex hull surrounding the edge
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*/
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virtual TQPointArray areaPoints() const { return m_arrArea; }
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/**
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* @return The head node of the edge
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*/
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GraphNode* getHead() { return m_pHead; }
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/**
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* @return The tail node of the edge
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*/
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GraphNode* getTail() { return m_pTail; }
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/**
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* @return The bounding rectangle of the edge's head
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*/
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TQRect tipRect() const { return m_rcTip; }
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/**
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* @return The file path for this call
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*/
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const TQString& getFile() const { return m_sFile; }
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/**
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* @return The line number for this call
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*/
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uint getLine() const { return m_sLine.toUInt(); }
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/**
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* @return The call's text
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*/
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const TQString& getText() const { return m_sText; }
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/** Identifies this class among other TQCanvasItem classes. */
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static int RTTI;
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/**
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* @return The class identifier
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*/
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virtual int rtti() const { return RTTI; }
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protected:
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virtual void drawShape(TQPainter&);
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private:
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/** The edge's starting point. */
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GraphNode* m_pHead;
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/** The edge's end point. */
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GraphNode* m_pTail;
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/** The points of the polygon part of the edge. */
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TQPointArray m_arrPoly;
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/** Control points for the spline part of the edge. */
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TQPointArray m_arrCurve;
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TQPointArray m_arrArea;
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/** The bounding rectangle of the edge's head, used for displaying the
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edge's tool-tip. */
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TQRect m_rcTip;
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/** The call's source file. */
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TQString m_sFile;
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/** The call's line number. */
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TQString m_sLine;
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/** The call's text. */
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TQString m_sText;
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void makeArrowhead(const ArrowInfo&);
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};
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#endif
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