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31
32 package org.antlr.xjlib.appkit.gview.shape;
33
34 import org.antlr.xjlib.appkit.gview.base.Path2D;
35 import org.antlr.xjlib.appkit.gview.base.Vector2D;
36 import org.antlr.xjlib.appkit.gview.object.GElementRect;
37
38 public class SLinkElbowLeftRight {
39
40 public static final int LEFT_RIGHT = 0;
41 public static final int RIGHT_LEFT = 1;
42 public static final int LABEL_OFFSET = 10;
43
44 public SLinkElbow link = null;
45 public Path2D path = null;
46
47 public SLinkElbowLeftRight(SLinkElbow link) {
48 this.link = link;
49 }
50
51 public void updateRightLeft() {
52 this.path = link.path;
53 if(link.getStartWithOffset().getX()<=link.getEndWithOffset().getX()) {
54 buildHorizontalPath();
55 } else {
56 if(Math.abs(link.end.y-link.start.y)>=GElementRect.DEFAULT_WIDTH+10) {
57 buildVerticalPath();
58 } else {
59 buildVerticalBottomPath(RIGHT_LEFT);
60 }
61 }
62 }
63
64 public void updateLeftRight() {
65 this.path = link.path;
66 if(link.getStartWithOffset().getX()>link.getEndWithOffset().getX()) {
67 buildHorizontalPath();
68 } else {
69 if(Math.abs(link.end.y-link.start.y)>=GElementRect.DEFAULT_WIDTH+10) {
70 buildVerticalPath();
71 } else {
72 buildVerticalBottomPath(LEFT_RIGHT);
73 }
74 }
75 }
76
77
78 public void buildHorizontalPath() {
79 Vector2D start_ = link.getStartWithOffset();
80 Vector2D end_ = link.getEndWithOffset();
81
82 Vector2D ab = end_.sub(start_);
83 Vector2D p1 = start_.add(new Vector2D(ab.getX()*0.5, 0));
84 Vector2D p2 = p1.add(new Vector2D(0, ab.getY()));
85 Vector2D p3 = p2.add(new Vector2D(ab.getX()*0.5, 0));
86
87 path.clear();
88 if(ab.getY()==0) {
89 path.add(link.start);
90 path.add(link.end);
91 } else {
92 path.add(link.start);
93 path.add(p1);
94 path.add(p2);
95 path.add(p3);
96 path.add(link.end);
97 }
98
99 link.label.setPosition(p2.copy().shift(-LABEL_OFFSET, -LABEL_OFFSET));
100 }
101
102 public void buildVerticalPath() {
103 Vector2D start_ = link.getStartWithOffset();
104 Vector2D end_ = link.getEndWithOffset();
105
106 Vector2D ab = end_.sub(start_);
107 Vector2D p1 = start_.add(new Vector2D(0, ab.getY()*0.5));
108 Vector2D p2 = p1.add(new Vector2D(ab.getX(), 0));
109 Vector2D p3 = p2.add(new Vector2D(0, ab.getY()*0.5));
110
111 path.clear();
112 path.add(link.start);
113 if(ab.getX()!=0) {
114 path.add(start_);
115 path.add(p1);
116 path.add(p2);
117 path.add(p3);
118 path.add(end_);
119 }
120 path.add(link.end);
121
122 link.label.setPosition(p2.copy().shift(-LABEL_OFFSET, -LABEL_OFFSET));
123 }
124
125 public void buildVerticalBottomPath(int direction) {
126 Vector2D start_ = link.getStartWithOffset();
127 Vector2D end_ = link.getEndWithOffset();
128
129 Vector2D start = link.start;
130 Vector2D end = link.end;
131
132 double farest_y = Math.max(start_.y, end_.y)+40;
133
134 if(direction == LEFT_RIGHT) {
135 if(start_.x > end.x-GElementRect.DEFAULT_HEIGHT-link.outOffsetLength) {
136
137 double end_box_bottom_edge = end.y+GElementRect.DEFAULT_WIDTH*0.5;
139 if(start_.y<=end_box_bottom_edge+5)
140 start_.x = end.x-GElementRect.DEFAULT_HEIGHT-link.outOffsetLength;
141 }
142
143 if(end_.x < start.x+GElementRect.DEFAULT_HEIGHT+link.outOffsetLength) {
144
145 double start_box_bottom_edge = start.y+GElementRect.DEFAULT_WIDTH*0.5;
147 if(end_.y<=start_box_bottom_edge+5)
148 end_.x = start.x+GElementRect.DEFAULT_HEIGHT+link.outOffsetLength;
149 }
150 } else {
151 if(start_.x < end.x+GElementRect.DEFAULT_HEIGHT+link.outOffsetLength) {
152
153 double end_box_bottom_edge = end.y+GElementRect.DEFAULT_WIDTH*0.5;
155 if(start_.y<=end_box_bottom_edge+5)
156 start_.x = end.x+GElementRect.DEFAULT_HEIGHT+link.outOffsetLength;
157 }
158
159 if(end_.x > start.x-GElementRect.DEFAULT_HEIGHT-link.outOffsetLength) {
160
161 double start_box_bottom_edge = start.y+GElementRect.DEFAULT_WIDTH*0.5;
163 if(end_.y<=start_box_bottom_edge+5)
164 end_.x = start.x-GElementRect.DEFAULT_HEIGHT-link.outOffsetLength;
165 }
166 }
167
168
170 Vector2D p1 = start_.add(new Vector2D(0, farest_y-start.y));
171 Vector2D p2 = end_.add(new Vector2D(0, farest_y-end.y));
172
173 path.clear();
174 path.add(start);
175 path.add(start_);
176 path.add(p1);
177 path.add(p2);
178 path.add(end_);
179 path.add(end);
180
181 Vector2D labelv = start_.sub(p2);
182 labelv.stretch(0.5);
183 link.label.setPosition(p2.add(labelv).shift(0, LABEL_OFFSET));
184 }
185 }
186 |
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