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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 | * Created on Dec 4, 2003 | |
12 | */ | |
13 | package edu.uci.ics.jung.visualization.contrib; | |
14 | ||
15 | /** | |
16 | * | |
17 | * @author danyelf | |
18 | */ | |
19 | /* | |
20 | * This source is under the same license with JUNG. | |
21 | * http://jung.sourceforge.net/license.txt for a description. | |
22 | */ | |
23 | //package edu.uci.ics.jung.visualization; | |
24 | //package org.ingrid.nexas.graph; | |
25 | ||
26 | import java.awt.Dimension; | |
27 | import java.util.Arrays; | |
28 | import java.util.Collections; | |
29 | import java.util.List; | |
30 | ||
31 | import edu.uci.ics.jung.graph.Graph; | |
32 | import edu.uci.ics.jung.graph.Vertex; | |
33 | import edu.uci.ics.jung.utils.Pair; | |
34 | import edu.uci.ics.jung.utils.UserData; | |
35 | import edu.uci.ics.jung.visualization.AbstractLayout; | |
36 | import edu.uci.ics.jung.visualization.Coordinates; | |
37 | ||
38 | /** | |
39 | * Positions vertices equally spaced on a regular circle. | |
40 | * Does not respect filter calls. | |
41 | * | |
42 | * @author Masanori Harada | |
43 | */ | |
44 | public class CircleLayout extends AbstractLayout { | |
45 | 0 | private static final Object CIRCLE_KEY = |
46 | "jung.Circle_Visualization_Key"; | |
47 | private Pair key; | |
48 | private double radius; | |
49 | ||
50 | public CircleLayout(Graph g) { | |
51 | 0 | super(g); |
52 | 0 | key = new Pair(this, CIRCLE_KEY); |
53 | 0 | } |
54 | ||
55 | public String getStatus() { | |
56 | 0 | return "CircleLayout"; |
57 | } | |
58 | ||
59 | /** | |
60 | * This one is not incremental. | |
61 | */ | |
62 | public boolean isIncremental() { | |
63 | 0 | return false; |
64 | } | |
65 | ||
66 | /** | |
67 | * Returns true; | |
68 | */ | |
69 | public boolean incrementsAreDone() { | |
70 | 0 | return true; |
71 | } | |
72 | ||
73 | public double getRadius() { | |
74 | 0 | return radius; |
75 | } | |
76 | ||
77 | public void setRadius(double radius) { | |
78 | 0 | this.radius = radius; |
79 | 0 | } |
80 | ||
81 | /** | |
82 | * Specifies the order of vertices. The first element of the | |
83 | * specified array will be positioned with angle 0 (on the X | |
84 | * axis), and the second one will be positioned with angle 1/n, | |
85 | * and the third one will be positioned with angle 2/n, and so on. | |
86 | * <p> | |
87 | * The default implemention shuffles elements randomly. | |
88 | */ | |
89 | public void orderVertices(Vertex[] vertices) { | |
90 | 0 | List list = Arrays.asList(vertices); |
91 | 0 | Collections.shuffle(list); |
92 | 0 | } |
93 | ||
94 | /** | |
95 | * Returns a visualization-specific key (that is, specific both | |
96 | * to this instance and <tt>AbstractLayout</tt>) that can be used | |
97 | * to access UserData related to the <tt>AbstractLayout</tt>. | |
98 | */ | |
99 | public Object getKey() { | |
100 | 0 | if (key == null) |
101 | 0 | key = new Pair(this, CIRCLE_KEY); |
102 | 0 | return key; |
103 | } | |
104 | ||
105 | protected void initialize_local_vertex(Vertex v) { | |
106 | 0 | if (v.getUserDatum(getKey()) == null) { |
107 | 0 | v.addUserDatum(getKey(), new CircleVertexData(), UserData.REMOVE); |
108 | } | |
109 | 0 | } |
110 | ||
111 | 0 | protected void initialize_local() {} |
112 | ||
113 | protected void initializeLocations() { | |
114 | 0 | super.initializeLocations(); |
115 | ||
116 | 0 | Vertex[] vertices = |
117 | (Vertex[]) getVisibleVertices().toArray(new Vertex[0]); | |
118 | 0 | orderVertices(vertices); |
119 | ||
120 | 0 | Dimension d = getCurrentSize(); |
121 | 0 | double height = d.getHeight(); |
122 | 0 | double width = d.getWidth(); |
123 | ||
124 | 0 | if (radius <= 0) { |
125 | 0 | radius = 0.45 * (height < width ? height : width); |
126 | } | |
127 | ||
128 | 0 | for (int i = 0; i < vertices.length; i++) { |
129 | 0 | Coordinates coord = getCoordinates(vertices[i]); |
130 | ||
131 | 0 | double angle = (2 * Math.PI * i) / vertices.length; |
132 | 0 | coord.setX(Math.cos(angle) * radius + width / 2); |
133 | 0 | coord.setY(Math.sin(angle) * radius + height / 2); |
134 | ||
135 | 0 | CircleVertexData data = getCircleData(vertices[i]); |
136 | 0 | data.setAngle(angle); |
137 | } | |
138 | 0 | } |
139 | ||
140 | public CircleVertexData getCircleData(Vertex v) { | |
141 | 0 | return (CircleVertexData) (v.getUserDatum(getKey())); |
142 | } | |
143 | ||
144 | /** | |
145 | * Do nothing. | |
146 | */ | |
147 | public void advancePositions() { | |
148 | 0 | } |
149 | ||
150 | public static class CircleVertexData { | |
151 | private double angle; | |
152 | ||
153 | public double getAngle() { | |
154 | return angle; | |
155 | } | |
156 | ||
157 | public void setAngle(double angle) { | |
158 | this.angle = angle; | |
159 | } | |
160 | ||
161 | public String toString() { | |
162 | return "CircleVertexData: angle=" + angle; | |
163 | } | |
164 | } | |
165 | } |
this report was generated by version 1.0.5 of jcoverage. |
copyright © 2003, jcoverage ltd. all rights reserved. |