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31
32 package org.antlr.works.visualization.graphics.path;
33
34 import org.antlr.works.visualization.graphics.GContext;
35 import org.antlr.works.visualization.graphics.GObject;
36 import org.antlr.works.visualization.graphics.shape.GLink;
37 import org.antlr.works.visualization.graphics.shape.GNode;
38
39 import java.awt.*;
40 import java.awt.geom.Point2D  ;
41 import java.util.HashSet ;
42 import java.util.Set ;
43
44 public class GPathElement extends GObject {
45
46 public GObject nodeOrLink;
47 public GObject source;
48 public GNode target;
49
50 public boolean isRuleLink = false;
51
52 public static GPathElement createLink(GNode node, GNode nextNode) {
53 GPathElement element = new GPathElement(node, nextNode);
54 element.setRuleLink(true);
55 return element;
56 }
57
58 public static GPathElement createElement(GObject object) {
59 return new GPathElement(object);
60 }
61
62 public GPathElement(GObject object) {
63 this.nodeOrLink = object;
64 }
65
66 public GPathElement(GObject source, GNode target) {
67 this.source = source;
68 this.target = target;
69 }
70
71 public void setContext(GContext context) {
72 super.setContext(context);
73 if(nodeOrLink != null)
74 nodeOrLink.setContext(context);
75 if(source != null)
76 source.setContext(context);
77 if(target != null)
78 target.setContext(context);
79 }
80
81 public boolean containsPoint(Point p) {
82 if(nodeOrLink != null)
83 return nodeOrLink.containsPoint(p);
84
85 return false;
86 }
87
88 public void setRuleLink(boolean flag) {
89 this.isRuleLink = flag;
90 }
91
92 public boolean isVisible() {
93 if(nodeOrLink != null)
94 return context.isObjectVisible(nodeOrLink);
95 else
96 return true;
97 }
98
99 public Set <GObject> getObjects() {
100 Set <GObject> objects = new HashSet <GObject>();
101
102 if(nodeOrLink != null)
103 objects.add(nodeOrLink);
104
105 if(source != null)
106 objects.add(source);
107 if(target != null)
108 objects.add(target);
109
110 return objects;
111 }
112
113 protected Point2D getBeginPoint() {
114 float x0;
115 float y0;
116 if(source instanceof GNode) {
117 GNode node = (GNode)source;
118 x0 = node.getCenterX();
119 y0 = node.getCenterY();
120 } else {
121 GLink link = (GLink)source;
122 x0 = link.target.getBeginX();
123 y0 = link.target.getBeginY();
124 }
125 return new Point2D.Float (x0, y0);
126 }
127
128 public Rectangle getBounds() {
129 if(nodeOrLink != null) {
130 return nodeOrLink.getBounds();
131 } else {
132 Point2D a = getBeginPoint();
133 int x1 = (int)a.getX();
134 int y1 = (int)a.getY();
135 int x2 = (int)target.getCenterX();
136 int y2 = (int)target.getCenterY();
137 return new Rectangle(x1, y1, x2-x1, y2-y1);
138 }
139 }
140
141 public void draw() {
142 if(nodeOrLink != null)
143 nodeOrLink.draw();
144
145 if(source != null && target != null) {
146 Point2D p = getBeginPoint();
147 context.setColor(context.linkColor);
148 context.drawSpline((float)p.getX(), (float)p.getY(), target.getCenterX(), target.getCenterY(),
149 0, context.getEndOffset(), 0, true);
150 }
151 }
152
153 }
154 |
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