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Java > Open Source Codes > org > antlr > xjlib > appkit > gview > object > GElementCircle


1 /*
2
3 [The "BSD licence"]
4 Copyright (c) 2005 Jean Bovet
5 All rights reserved.
6
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions
9 are met:
10
11 1. Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
13 2. Redistributions in binary form must reproduce the above copyright
14 notice, this list of conditions and the following disclaimer in the
15 documentation and/or other materials provided with the distribution.
16 3. The name of the author may not be used to endorse or promote products
17 derived from this software without specific prior written permission.
18
19 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29
30 */
31
32 package org.antlr.xjlib.appkit.gview.object;
33
34 import org.antlr.xjlib.appkit.gview.base.Anchor2D;
35 import org.antlr.xjlib.appkit.gview.base.Rect;
36 import org.antlr.xjlib.appkit.gview.base.Vector2D;
37 import org.antlr.xjlib.appkit.gview.shape.SLabel;
38 import org.antlr.xjlib.foundation.XJXMLSerializable;
39
40 import java.awt.*;
41
42 public class GElementCircle extends GElement implements XJXMLSerializable {
43
44     public static final int DEFAULT_RADIUS = 20;
45
46     protected double radius = DEFAULT_RADIUS;
47
48     public GElementCircle() {
49     }
50
51     public void setRadius(double radius) {
52         this.radius = radius;
53         elementDimensionDidChange();
54     }
55
56     public double getRadius() {
57         return radius;
58     }
59
60     public void updateAnchors() {
61         setAnchor(ANCHOR_CENTER, position, Anchor2D.DIRECTION_FREE);
62         setAnchor(ANCHOR_TOP, position.add(new Vector2D(0, -radius)), Anchor2D.DIRECTION_TOP);
63         setAnchor(ANCHOR_BOTTOM, position.add(new Vector2D(0, radius)), Anchor2D.DIRECTION_BOTTOM);
64         setAnchor(ANCHOR_LEFT, position.add(new Vector2D(-radius, 0)), Anchor2D.DIRECTION_LEFT);
65         setAnchor(ANCHOR_RIGHT, position.add(new Vector2D(radius, 0)), Anchor2D.DIRECTION_RIGHT);
66     }
67
68     public double getDefaultAnchorOffset(String JavaDoc anchorKey) {
69         if(anchorKey != null && anchorKey.equals(ANCHOR_CENTER))
70             return radius;
71         else
72             return 0;
73     }
74
75     public Rect getFrame() {
76         double x = getPositionX()-radius;
77         double y = getPositionY()-radius;
78         double dx = radius*2;
79         double dy = radius*2;
80         return new Rect(x, y, dx, dy);
81     }
82
83     public boolean isInside(Point p) {
84         return Math.abs(p.getX()-getPositionX())<radius && Math.abs(p.getY()-getPositionY())<radius;
85     }
86
87     public void draw(Graphics2D g) {
88         if(isVisibleInClip(g)) {
89             if(labelVisible) {
90                 g.setColor(labelColor);
91                 SLabel.drawCenteredString(getLabel(), (int)getPositionX(), (int)getPositionY(), g);
92             }
93
94             if(color != null)
95                 g.setColor(color);
96             else
97                 g.setColor(Color.black);
98
99             g.setStroke(strokeSize);
100
101             drawShape(g);
102
103             g.setStroke(strokeNormal);
104         }
105     }
106
107     public void drawShape(Graphics2D g) {
108         super.drawShape(g);
109
110         int x = (int)(getPositionX()-radius);
111         int y = (int)(getPositionY()-radius);
112
113         g.drawOval(x, y, (int)(radius*2), (int)(radius*2));
114     }
115
116 }
117
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