1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
|
/*
* @(#)DefaultEdge.java 1.0 03-JUL-04
*
* Copyright (c) 2001-2004 Gaudenz Alder
*
*/
package org.jgraph.graph;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.util.ArrayList;
import java.util.List;
/**
* A simple implementation for an edge.
*
* @version 1.0 1/1/02
* @author Gaudenz Alder
*/
public class DefaultEdge extends DefaultGraphCell implements Edge {
/** Source and target of the edge. */
protected Object source, target;
/**
* Constructs an empty edge.
*/
public DefaultEdge() {
this(null);
}
/**
* Constructs an edge that holds a reference to the specified user object.
*
* @param userObject
* reference to the user object
*/
public DefaultEdge(Object userObject) {
this(userObject, null);
}
/**
* Constructs an edge that holds a reference to the specified user object
* and sets default values for points and the label position.
*
* @param userObject
* reference to the user object
*/
public DefaultEdge(Object userObject, AttributeMap storageMap) {
super(userObject, storageMap);
}
/**
* Returns the source of the edge.
*/
public Object getSource() {
return source;
}
/**
* Returns the target of the edge.
*/
public Object getTarget() {
return target;
}
/**
* Sets the source of the edge.
*/
public void setSource(Object port) {
source = port;
}
/**
* Returns the target of <code>edge</code>.
*/
public void setTarget(Object port) {
target = port;
}
/**
* Create a clone of the cell. The cloning of the user object is deferred to
* the cloneUserObject() method. The source and target references are set to
* null.
*
* @return Object a clone of this object.
*/
public Object clone() {
DefaultEdge edge = (DefaultEdge) super.clone();
edge.source = null;
edge.target = null;
return edge;
}
//
// Default Routing
//
public static class LoopRouting implements Edge.Routing {
public List route(GraphLayoutCache cache, EdgeView edge) {
if (edge.isLoop()) {
return routeLoop(cache, edge);
}
return routeEdge(cache, edge);
}
protected List routeLoop(GraphLayoutCache cache, EdgeView edge) {
List newPoints = new ArrayList();
newPoints.add(edge.getSource());
CellView sourceParent = (edge.getSource() != null) ? edge
.getSource().getParentView() : edge.getSourceParentView();
if (sourceParent != null) {
Point2D from = AbstractCellView.getCenterPoint(sourceParent);
Rectangle2D rect = sourceParent.getBounds();
double width = rect.getWidth();
double height2 = rect.getHeight() / 2;
double loopWidth = Math.min(20, Math.max(10, width / 8));
double loopHeight = Math.min(30, Math.max(12, Math.max(
loopWidth + 4, height2 / 2)));
newPoints.add(edge.getAttributes().createPoint(
from.getX() - loopWidth,
from.getY() - height2 - loopHeight * 1.2));
newPoints.add(edge.getAttributes().createPoint(from.getX(),
from.getY() - height2 - 1.5 * loopHeight));
newPoints.add(edge.getAttributes().createPoint(
from.getX() + loopWidth,
from.getY() - height2 - loopHeight * 1.2));
newPoints.add(edge.getTarget());
return newPoints;
}
return null;
}
protected List routeEdge(GraphLayoutCache cache, EdgeView edge) {
return null;
}
public int getPreferredLineStyle(EdgeView edge) {
if (edge.isLoop()) {
return getLoopStyle();
}
return getEdgeStyle();
}
protected int getLoopStyle() {
return GraphConstants.STYLE_BEZIER;
}
protected int getEdgeStyle() {
return NO_PREFERENCE;
}
}
public static class DefaultRouting extends LoopRouting {
protected List routeEdge(GraphLayoutCache cache, EdgeView edge) {
List newPoints = new ArrayList();
int n = edge.getPointCount();
Point2D from = edge.getPoint(0);
newPoints.add(from);
if (edge.getSource() instanceof PortView) {
newPoints.set(0, edge.getSource());
from = ((PortView) edge.getSource()).getLocation();
} else if (edge.getSource() != null) {
Rectangle2D b = edge.getSource().getBounds();
from = edge.getAttributes().createPoint(b.getCenterX(),
b.getCenterY());
}
Point2D to = edge.getPoint(n - 1);
CellView target = edge.getTarget();
if (target instanceof PortView)
to = ((PortView) target).getLocation();
else if (target != null) {
Rectangle2D b = target.getBounds();
to = edge.getAttributes().createPoint(b.getCenterX(),
b.getCenterY());
}
if (from != null && to != null) {
Point2D[] routed;
double dx = Math.abs(from.getX() - to.getX());
double dy = Math.abs(from.getY() - to.getY());
double x2 = from.getX() + ((to.getX() - from.getX()) / 2);
double y2 = from.getY() + ((to.getY() - from.getY()) / 2);
routed = new Point2D[2];
Rectangle2D targetBounds = null;
Rectangle2D sourceBounds = null;
if ((edge.getTarget() != null && edge.getTarget()
.getParentView() != null)
&& (edge.getSource() != null && edge.getSource()
.getParentView() != null)) {
targetBounds = edge.getTarget().getParentView().getBounds();
sourceBounds = edge.getSource().getParentView().getBounds();
}
if (targetBounds != null && sourceBounds != null) {
if (dx > dy) {
routed[0] = edge.getAttributes().createPoint(x2,
from.getY());
routed[1] = edge.getAttributes().createPoint(x2,
to.getY());
if (targetBounds.contains(routed[0])
|| (sourceBounds.contains(routed[0]))
|| targetBounds.contains(routed[1])
|| (sourceBounds.contains(routed[1]))) {
routed[0] = edge.getAttributes().createPoint(
from.getX(), y2);
routed[1] = edge.getAttributes().createPoint(
to.getX(), y2);
}
} else {
routed[0] = edge.getAttributes().createPoint(
from.getX(), y2);
routed[1] = edge.getAttributes().createPoint(to.getX(),
y2);
if (targetBounds.contains(routed[0])
|| (sourceBounds.contains(routed[0]))
|| targetBounds.contains(routed[1])
|| (sourceBounds.contains(routed[1]))) {
routed[0] = edge.getAttributes().createPoint(x2,
from.getY());
routed[1] = edge.getAttributes().createPoint(x2,
to.getY());
}
}
// Set/Add Points
for (int i = 0; i < routed.length; i++) {
if (!targetBounds.contains(routed[i])
&& (!sourceBounds.contains(routed[i]))) {
newPoints.add(routed[i]);
}
}
}
// Add target point
if (target != null)
newPoints.add(target);
else
newPoints.add(to);
return newPoints;
}
return null;
}
}
}
|