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31
32 package org.antlr.xjlib.appkit.gview.object;
33
34 import org.antlr.xjlib.appkit.gview.base.Rect;
35 import org.antlr.xjlib.appkit.gview.base.Vector2D;
36 import org.antlr.xjlib.appkit.gview.shape.SLink;
37 import org.antlr.xjlib.appkit.gview.shape.SLinkArc;
38 import org.antlr.xjlib.appkit.gview.shape.SLinkBezier;
39 import org.antlr.xjlib.appkit.gview.shape.SLinkElbow;
40 import org.antlr.xjlib.foundation.XJXMLSerializable;
41
42 import java.awt.*;
43
44
45 public class GLink extends GElement implements XJXMLSerializable {
46
47 public static final int SHAPE_ARC = 0;
48 public static final int SHAPE_ELBOW = 1;
49 public static final int SHAPE_BEZIER = 2;
50
51 public GElement source = null;
52 public GElement target = null;
53 public String  sourceAnchorKey = null;
54 public String targetAnchorKey = null;
55 public String pattern = null;
56
57 protected SLink link = null;
58
59 protected int shape = SHAPE_ARC;
60
61 public GLink() {
62 super();
63 }
64
65 public GLink(GElement source, String sourceAnchorKey, GElement target, String targetAnchorKey, int shape, String pattern, Point mouse, double flateness) {
66 this.source = source;
67 this.target = target;
68 this.sourceAnchorKey = sourceAnchorKey;
69 this.targetAnchorKey = targetAnchorKey;
70 this.shape = shape;
71 this.pattern = pattern;
72 initializeLink(flateness);
73 setSourceTangentOffset(source.getDefaultAnchorOffset(sourceAnchorKey));
74 setTargetTangentOffset(target.getDefaultAnchorOffset(targetAnchorKey));
75 link.setDirection(Vector2D.vector(mouse).sub(target.getPosition()));
76 }
77
78 public GLink(GElement source, String sourceAnchorKey, GElement target, String targetAnchorKey, int shape, String pattern, double flateness) {
79 this.source = source;
80 this.target = target;
81 this.sourceAnchorKey = sourceAnchorKey;
82 this.targetAnchorKey = targetAnchorKey;
83 this.shape = shape;
84 this.pattern = pattern;
85 initializeLink(flateness);
86 if(source == target)
87 link.setDirection(new Vector2D(0, 1));
88 else
89 link.setDirection(source.getPosition().sub(target.getPosition()));
90 setSourceTangentOffset(source.getDefaultAnchorOffset(sourceAnchorKey));
91 setTargetTangentOffset(target.getDefaultAnchorOffset(targetAnchorKey));
92 }
93
94 public void setBezierControlPoints(Vector2D points[]) {
95 if(link instanceof SLinkBezier) {
96 SLinkBezier lb = (SLinkBezier)link;
97 lb.setControlPoints(points);
98 }
99 }
100
101 public void setBezierLabelPosition(Vector2D position) {
102 if(link instanceof SLinkBezier) {
103 SLinkBezier lb = (SLinkBezier)link;
104 lb.setLabelPosition(position);
105 }
106 }
107
108 protected SLink createLinkInstance() {
109 switch(shape) {
110 case SHAPE_ARC: return new SLinkArc();
111 case SHAPE_ELBOW: return new SLinkElbow();
112 case SHAPE_BEZIER: return new SLinkBezier();
113 }
114 return null;
115 }
116
117 protected void initializeLink(double flateness) {
118 if(link == null) {
119 link = createLinkInstance();
120 link.setFlateness(flateness);
121 }
122 }
123
124 public void setSource(GElement source) {
125 this.source = source;
126 }
127
128 public GElement getSource() {
129 return source;
130 }
131
132 public void setTarget(GElement target) {
133 this.target = target;
134 }
135
136 public GElement getTarget() {
137 return target;
138 }
139
140 public void setSourceAnchorKey(String key) {
141 this.sourceAnchorKey = key;
142 }
143
144 public String getSourceAnchorKey() {
145 return sourceAnchorKey;
146 }
147
148 public void setTargetAnchorKey(String key) {
149 this.targetAnchorKey = key;
150 }
151
152 public String getTargetAnchorKey() {
153 return targetAnchorKey;
154 }
155
156 public void setSourceTangentOffset(double offset) {
157 link.setStartTangentOffset(offset);
158 }
159
160 public void setTargetTangentOffset(double offset) {
161 link.setEndTangentOffset(offset);
162 }
163
164 public void setSourceOffset(double x, double y) {
165 setSourceOffset(new Vector2D(x, y));
166 }
167
168 public void setSourceOffset(Vector2D offset) {
169 link.setStartOffset(offset);
170 }
171
172 public void setTargetOffset(double x, double y) {
173 setTargetOffset(new Vector2D(x, y));
174 }
175
176 public void setTargetOffset(Vector2D offset) {
177 link.setEndOffset(offset);
178 }
179
180 public void setLink(SLink link) {
181 this.link = link;
182 }
183
184 public SLink getLink() {
185 return link;
186 }
187
188 public void setPattern(String pattern) {
189 this.pattern = pattern;
190 }
191
192 public String getPattern() {
193 return pattern;
194 }
195
196 @Override
197 public void setLabel(String label) {
198 this.pattern = label;
199 }
200
201 @Override
202 public void setLabelColor(Color color) {
203 link.setLabelColor(color);
204 }
205
206 @Override
207 public void setLabelVisible(boolean flag) {
208 if(link != null)
209 link.setLabelVisible(flag);
210 }
211
212 @Override
213 public boolean isLabelVisible() {
214 return link != null && link.isLabelVisible();
215 }
216
217 public void setShape(int type) {
218 this.shape = type;
219 }
220
221 public int getShape() {
222 return shape;
223 }
224
225 public void toggleShape() {
226 switch(shape) {
227 case SHAPE_ARC:
228 shape = SHAPE_ELBOW;
229 break;
230 case SHAPE_ELBOW:
231 shape = SHAPE_ARC;
232 break;
233 case SHAPE_BEZIER:
234 return;
236 }
237 double flateness = link.getFlateness();
238 Vector2D direction = link.getDirection();
239
240 link = createLinkInstance();
241 link.setFlateness(flateness);
242 link.setDirection(direction);
243 }
244
245 public void setMousePosition(Point mouse) {
246 link.setDirection(Vector2D.vector(mouse).sub(target.getPosition()));
247 link.setMousePosition(Vector2D.vector(mouse));
248 }
249
250 @Override
251 public Rect getFrame() {
252 update();
253 return link.getFrame();
254 }
255
256 @Override
257 public boolean isInside(Point p) {
258 return link != null && link.contains(p.x, p.y);
259 }
260
261 public void update() {
262 initializeLink(0);
263
264 source.updateAnchors();
265 target.updateAnchors();
266
267 link.setStartAnchor(source.getAnchor(sourceAnchorKey));
268 link.setEndAnchor(target.getAnchor(targetAnchorKey));
269 link.setLabel(pattern);
270 link.setSelfLoop(source == target);
271
272 link.update();
273 }
274
275 @Override
276 public void draw(Graphics2D g) {
277 update();
278
279 if(isVisibleInClip(g)) {
280 g.setStroke(new BasicStroke(penSize));
281
282 if(color != null)
283 link.setColor(color);
284 else
285 link.setColor(Color.black);
286
287 link.draw(g);
288 }
289 }
290
291 @Override
292 public void drawShape(Graphics2D g) {
293 link.drawShape(g);
294 }
295
296 }
297 |
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