|
1
31
32 package org.antlr.works.visualization.graphics;
33
34 import org.antlr.xjlib.appkit.gview.base.Vector2D;
35 import org.antlr.xjlib.appkit.gview.shape.SLinkArc;
36
37 import java.awt.*;
38 import java.awt.font.TextLayout  ;
39 import java.awt.geom.QuadCurve2D ;
40
41 public class GEngineGraphics extends GEngine {
42
43 SLinkArc link_arc = new SLinkArc();
44
45 public GEngineGraphics() {
46 }
47
48 public Graphics2D getG2D() {
49 return context.getGraphics2D();
50 }
51
52 public void setColor(Color color) {
53 getG2D().setColor(color);
54 }
55
56 public Color getColor() {
57 return getG2D().getColor();
58 }
59
60 public void setLineWidth(float width) {
61 getG2D().setStroke(new BasicStroke(width));
62 }
63
64 public float getStringPixelWidth(Font font, String s) {
65 getG2D().setFont(font);
66 TextLayout layout = new TextLayout (s, getG2D().getFont(), getG2D().getFontRenderContext());
67 return (float)layout.getBounds().getWidth();
68 }
69
70 public void drawLine(float x0, float y0, float x1, float y1) {
71 getG2D().drawLine((int)x0, (int)y0, (int)x1, (int)y1);
72 }
73
74 public void drawArc(float x, float y, float w, float h, int a0, int a1) {
75 getG2D().drawArc((int)x, (int)y, (int)w, (int)h, a0, a1);
76 }
77
78 public void drawCircle(float x, float y, float r) {
79 getG2D().drawArc((int)(x-r), (int)(y-r), (int)(2*r), (int)(2*r), 0, 360);
80 }
81
82 public void drawRect(float x, float y, float dx, float dy) {
83 getG2D().drawRect((int)x, (int)y, (int)dx, (int)dy);
84 }
85
86 public void drawRoundRect(float x, float y, float dx, float dy, float arc_dx, float arc_dy) {
87 getG2D().drawRoundRect((int)x, (int)y, (int)dx, (int)dy, (int)arc_dx, (int)arc_dy);
88 }
89
90 public void drawOval(float x, float y, float dx, float dy) {
91 getG2D().drawOval((int)x, (int)y, (int)dx, (int)dy);
92 }
93
94 public void fillRect(float x, float y, float dx, float dy) {
95 getG2D().fillRect((int)x, (int)y, (int)dx, (int)dy);
96 }
97
98 public void fillOval(float x, float y, float dx, float dy) {
99 getG2D().fillOval((int)x, (int)y, (int)dx, (int)dy);
100 }
101
102 public void fillCircle(float x, float y, float r) {
103 getG2D().fillArc((int)(x-r), (int)(y-r), (int)(2*r), (int)(2*r), 0, 360);
104 }
105
106 public void drawRightArrow(float ox, float oy, float w, float h) {
107 int[] x = new int[] { (int)(ox-w), (int)ox, (int)(ox-w) };
108 int[] y = new int[] { (int)(oy-h), (int)oy, (int)(oy+h) };
109
110 getG2D().drawPolygon(x, y, 3);
111 getG2D().fillPolygon(x, y, 3);
112 }
113
114 public void drawUpArrow(float ox, float oy, float w, float h) {
115 int[] x = new int[] { (int)(ox-h), (int)ox, (int)(ox+h) };
116 int[] y = new int[] { (int)(oy+w), (int)oy, (int)(oy+w) };
117
118 getG2D().drawPolygon(x, y, 3);
119 getG2D().fillPolygon(x, y, 3);
120 }
121
122 public void drawDownArrow(float ox, float oy, float w, float h) {
123 int[] x = new int[] { (int)(ox-h), (int)ox, (int)(ox+h) };
124 int[] y = new int[] { (int)(oy-w), (int)oy, (int)(oy-w) };
125
126 getG2D().drawPolygon(x, y, 3);
127 getG2D().fillPolygon(x, y, 3);
128 }
129
130 public void drawString(Font font, String s, float x, float y, int align) {
131 getG2D().setFont(font);
132 TextLayout layout = new TextLayout (s, font, getG2D().getFontRenderContext());
133 float tx = Float.MIN_VALUE;
134 float ty = Float.MIN_VALUE;
135 switch(align) {
136 case GContext.ALIGN_CENTER:
137 tx = (float)(x-layout.getBounds().getWidth()*0.5);
138 ty = (float)(y+layout.getBounds().getHeight()*0.5);
139 break;
140 case GContext.ALIGN_CENTER_UP:
141 tx = (float)(x-layout.getBounds().getWidth()*0.5);
142 ty = y;
143 break;
144 case GContext.ALIGN_RIGHT:
145 tx = (float)(x-layout.getBounds().getWidth());
146 ty = (float)(y+layout.getBounds().getHeight()*0.5);
147 break;
148 }
149 layout.draw(getG2D(), tx, ty-1);
150 }
151
152 public void drawSpline(float x0, float y0, float x1, float y1, float startOffset, float endOffset, float flateness, boolean arrow) {
153 link_arc.setStart(x0, y0);
154 link_arc.setEnd(x1, y1);
155 link_arc.setStartTangentOffset(startOffset);
156 link_arc.setEndTangentOffset(endOffset);
157 link_arc.setFlateness(flateness);
158 link_arc.setArrowVisible(arrow);
159 link_arc.update();
160 link_arc.setColor(getG2D().getColor());
161 link_arc.draw(getG2D());
162 }
163
164 public void drawArcConnector(float x0, float y0, float x1, float y1,
165 float start_offset, float end_offset,
166 float ctrl_offset, float arc_offset,
167 boolean arrow)
168 {
169 if(x0>x1) {
170 ctrl_offset *= -1;
171 arc_offset *= -1;
172 }
173
174 float cx = x1-ctrl_offset;
175 float ax0 = cx-arc_offset;
176
177 Vector2D a = new Vector2D(cx, y0);
178 Vector2D b = new Vector2D(x1, y1);
179 Vector2D z = a.add(b.sub(a).setLength(Math.abs(arc_offset)));
180
181 drawLine(x0+start_offset, y0, ax0, y0);
182 drawSpline((float)z.x, (float)z.y, x1, y1, 0, end_offset, 0, arrow);
183
184 QuadCurve2D.Float quad = new QuadCurve2D.Float ();
185 quad.setCurve(ax0, y0, cx, y0, (float)z.x, (float)z.y);
186 getG2D().draw(quad);
187 }
188
189
190 }
191 |
Popular Tags |
Java API By Example, From Geeks To Geeks.