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1
31
32 package org.antlr.xjlib.appkit.gview.utils;
33
34 import org.antlr.xjlib.appkit.gview.base.Vector2D;
35
36 import java.awt.*;
37
38 public class GMagnetic {
39
40 public static final int HORIZONTAL = 0;
41 public static final int VERTICAL = 1;
42
43 private int kind = HORIZONTAL;
44 private double factor = 0;
45 private boolean visible = false;
46
47 public static GMagnetic createHorizontal(double factor) {
48 GMagnetic m = new GMagnetic();
49 m.kind = HORIZONTAL;
50 m.factor = factor;
51 return m;
52 }
53
54 public static GMagnetic createVertical(double factor) {
55 GMagnetic m = new GMagnetic();
56 m.kind = VERTICAL;
57 m.factor = factor;
58 return m;
59 }
60
61 public void setVisible(boolean flag) {
62 this.visible = flag;
63 }
64
65 public boolean isVisible() {
66 return visible;
67 }
68
69 public void showAndAjust(Vector2D position, Dimension realSize) {
70 setVisible(false);
71
72 if(kind == HORIZONTAL) {
73 if(Math.abs(position.y-realSize.height*factor)<5) {
74 position.y = realSize.height*factor;
75 setVisible(true);
76 }
77 } else {
78 if(Math.abs(position.x-realSize.width*factor)<5) {
79 position.x = realSize.width*factor;
80 setVisible(true);
81 }
82 }
83 }
84
85 public void draw(Graphics2D g2d, Dimension realSize) {
86 int middleV = (int)(realSize.height*factor);
87 int middleH = (int)(realSize.width*factor);
88
89 if(kind == HORIZONTAL) {
90 g2d.drawLine(0, middleV, realSize.width, middleV);
91 } else {
92 g2d.drawLine(middleH, 0, middleH, realSize.height);
93 }
94
95 }
96 }
97 |
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