| Line | Hits | Source |
|---|---|---|
| 1 | /* | |
| 2 | * Copyright (c) 2003, the JUNG Project and the Regents of the University | |
| 3 | * of California | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * This software is open-source under the BSD license; see either | |
| 7 | * "license.txt" or | |
| 8 | * http://jung.sourceforge.net/license.txt for a description. | |
| 9 | */ | |
| 10 | ||
| 11 | package edu.uci.ics.jung.visualization.contrib; | |
| 12 | ||
| 13 | import java.awt.BasicStroke; | |
| 14 | import java.awt.Graphics2D; | |
| 15 | import java.awt.Point; | |
| 16 | import java.awt.Shape; | |
| 17 | import java.awt.Stroke; | |
| 18 | import java.awt.geom.AffineTransform; | |
| 19 | import java.awt.geom.GeneralPath; | |
| 20 | ||
| 21 | /** | |
| 22 | * This pluggable utility paints either a "classic" or a "sleek" filled arrow | |
| 23 | * on a given edge. To use, create an instance of the Arrow object | |
| 24 | * with your preferred thickness, and then call | |
| 25 | * arrow.drawArrow( graphics, source_x1, source_y1, dest_x, dest_y2 ) for the edge. | |
| 26 | * | |
| 27 | * Note that the arrow simply uses the color currently set in the graphics context. | |
| 28 | * | |
| 29 | * @author Jon Froehlich | |
| 30 | */ | |
| 31 | public class Arrow { | |
| 32 | ||
| 33 | public static final String CLASSIC = "Arrow.CLASSIC"; | |
| 34 | public static final String SLEEK = "Arrow.SLEEK"; | |
| 35 | ||
| 36 | protected String m_arrowType; | |
| 37 | 0 | protected int m_arrowLength = 4; |
| 38 | 0 | protected int m_arrowWidth = 10; |
| 39 | protected Stroke m_arrowStroke; | |
| 40 | ||
| 41 | 0 | public Arrow(String type, int length, int width){ |
| 42 | 0 | m_arrowType = type; |
| 43 | 0 | if(length>0){ |
| 44 | 0 | m_arrowLength = length; |
| 45 | } | |
| 46 | ||
| 47 | 0 | if(width>0){ |
| 48 | 0 | m_arrowWidth = width; |
| 49 | } | |
| 50 | ||
| 51 | 0 | m_arrowStroke = new BasicStroke(2); |
| 52 | ||
| 53 | 0 | if(this.m_arrowType == SLEEK){ |
| 54 | 0 | arrowhead = getSleekArrow(); |
| 55 | }else{ | |
| 56 | 0 | arrowhead = getClassicArrow(); |
| 57 | } | |
| 58 | ||
| 59 | 0 | } |
| 60 | ||
| 61 | GeneralPath arrowhead; | |
| 62 | ||
| 63 | ||
| 64 | // public void drawArrow(Graphics2D g2d, double x1, double y1, | |
| 65 | // double x2, double y2, Shape vertex, boolean directed) | |
| 66 | // { | |
| 67 | // double theta = Math.atan2((y1 - y2), (x1 - x2)) + Math.PI; | |
| 68 | // | |
| 69 | // // calculate offset from center of vertex bounding box; | |
| 70 | // // create coordinates for source and dest centered at dest | |
| 71 | // // (since vertex shape will be centered at dest) | |
| 72 | // Coordinates source = new Coordinates(x1-x2, y1-y2); | |
| 73 | // Coordinates dest = new Coordinates(0,0); | |
| 74 | // Coordinates c = CoordinateUtil.getClosestIntersection(source, dest, vertex.getBounds2D()); | |
| 75 | // if (c == null) // can happen if source and dest are the same | |
| 76 | // return; | |
| 77 | // double bounding_box_offset = CoordinateUtil.distance(c, dest); | |
| 78 | // | |
| 79 | // // transform arrowhead into dest coordinate space | |
| 80 | // AffineTransform at = new AffineTransform(); | |
| 81 | // at.translate(x2, y2); | |
| 82 | // if (directed) | |
| 83 | // theta += Math.atan2(SettableRenderer.CONTROL_OFFSET, | |
| 84 | // CoordinateUtil.distance(source,dest)/2); | |
| 85 | // at.rotate(theta); | |
| 86 | // at.translate(-bounding_box_offset, 0); | |
| 87 | // | |
| 88 | // // draw the arrowhead | |
| 89 | // Stroke previous = g2d.getStroke(); | |
| 90 | // g2d.setStroke(this.m_arrowStroke); | |
| 91 | // g2d.fill(at.createTransformedShape(arrowhead)); | |
| 92 | // g2d.setStroke(previous); | |
| 93 | // } | |
| 94 | ||
| 95 | public void drawArrow(Graphics2D g2d, int sourceX, int sourceY, int destX, int destY, int vertexDiam){ | |
| 96 | 0 | Stroke oldStroke = g2d.getStroke(); |
| 97 | 0 | g2d.setStroke(this.m_arrowStroke); |
| 98 | 0 | Point point1 = new Point(sourceX, sourceY); |
| 99 | 0 | Point point2 = new Point(destX, destY); |
| 100 | ||
| 101 | // get angle of line from 0 - 360 | |
| 102 | 0 | double thetaRadians = Math.atan2(( point1.getY() - point2.getY()),(point1.getX() - |
| 103 | point2.getX()))+Math.PI; | |
| 104 | ||
| 105 | // float distance = (float) point1.distance(point2)-vertexDiam/2.0f; | |
| 106 | 0 | AffineTransform at = new AffineTransform(); |
| 107 | 0 | at.translate(point2.getX() , point2.getY() ); |
| 108 | 0 | at.rotate(thetaRadians); |
| 109 | 0 | at.translate( - vertexDiam / 2.0f, 0 ); |
| 110 | 0 | Shape arrow = at.createTransformedShape(arrowhead); |
| 111 | 0 | g2d.fill(arrow); |
| 112 | 0 | g2d.setStroke(oldStroke); |
| 113 | 0 | } |
| 114 | ||
| 115 | protected GeneralPath getSleekArrow(){ | |
| 116 | 0 | GeneralPath arrow = new GeneralPath(); |
| 117 | // float distance = 0; | |
| 118 | // (float) point1.distance(point2)-vertexDiam/2.0f; | |
| 119 | // create arrowed line general path | |
| 120 | 0 | int width = (int) (m_arrowWidth/2.0f); |
| 121 | 0 | arrow.moveTo( 0, 0); |
| 122 | 0 | arrow.lineTo( (- m_arrowLength), width); |
| 123 | 0 | arrow.lineTo( (- m_arrowLength) , -width); |
| 124 | 0 | arrow.lineTo( 0, 0 ); |
| 125 | 0 | return arrow; |
| 126 | } | |
| 127 | ||
| 128 | protected GeneralPath getClassicArrow(){ | |
| 129 | 0 | GeneralPath arrow = new GeneralPath(); |
| 130 | // float distance = (float) point1.distance(point2)-vertexDiam/2.0f; | |
| 131 | 0 | float distance = 0; |
| 132 | // create arrowed line general path | |
| 133 | 0 | int width = (int) (m_arrowWidth/2.0f); |
| 134 | 0 | arrow.moveTo( distance , 0); |
| 135 | 0 | arrow.lineTo( (distance - m_arrowLength), width); |
| 136 | 0 | arrow.lineTo( (distance - m_arrowLength) , -width); |
| 137 | 0 | arrow.lineTo( distance , 0 ); |
| 138 | 0 | return arrow; |
| 139 | } | |
| 140 | } |
|
this report was generated by version 1.0.5 of jcoverage. |
copyright © 2003, jcoverage ltd. all rights reserved. |