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37
40
41 package java2d.demos.Fonts;
42
43
44 import static java.awt.Color  .*;
45 import java.awt.*;
46 import java.awt.event.*;
47 import java.awt.font.TextLayout ;
48 import java.awt.font.TextHitInfo ;
49 import java.awt.font.FontRenderContext ;
50 import java.awt.geom.Rectangle2D ;
51 import java.awt.geom.AffineTransform ;
52 import java2d.AnimatingSurface;
53
54
55
59 public class Highlighting extends AnimatingSurface {
60
61 private static String text[] = { "HILIGHTING", "Java2D" };
62 private static Color colors[] = { CYAN, LIGHT_GRAY };
63 private static Font smallF = new Font("Monospaced", Font.PLAIN, 8);
64 private int[] curPos;
65 private TextLayout [] layouts;
66 private Font[] fonts;
67
68
69 public Highlighting() {
70 setBackground(WHITE);
71 fonts = new Font[2];
72 layouts = new TextLayout [fonts.length];
73 curPos = new int[fonts.length];
74 }
75
76
77 public void reset(int w, int h) {
78 fonts[0] = new Font("Monospaced",Font.PLAIN,w/text[0].length()+8);
79 fonts[1] = new Font("Serif", Font.BOLD,w/text[1].length());
80 for (int i = 0; i < layouts.length; i++ ) {
81 curPos[i] = 0;
82 }
83 }
84
85
86 public void step(int w, int h) {
87 setSleepAmount(900);
88 for (int i = 0; i < 2; i++) {
89 if (layouts[i] == null) {
90 continue;
91 }
92 if (curPos[i]++ == layouts[i].getCharacterCount()) {
93 curPos[i] = 0;
94 }
95 }
96 }
97
98
99 public void render(int w, int h, Graphics2D g2) {
100 FontRenderContext frc = g2.getFontRenderContext();
101 for (int i = 0; i < 2; i++) {
102 layouts[i] = new TextLayout (text[i], fonts[i], frc);
103 float rw = layouts[i].getAdvance();
104 float rh = layouts[i].getAscent() + layouts[i].getDescent();
105 float rx = (float) ((w - rw) /2);
106 float ry = (float) ((i == 0) ? h/3 : h * 0.75f);
107
108 Shape hilite = layouts[i].getLogicalHighlightShape(0, curPos[i]);
110 AffineTransform at = AffineTransform.getTranslateInstance(rx, ry);
111 hilite = at.createTransformedShape(hilite);
112 float hy = (float) hilite.getBounds2D().getY();
113 float hh = (float) hilite.getBounds2D().getHeight();
114 g2.setColor(colors[i]);
115 g2.fill(hilite);
116
117 Shape[] shapes = layouts[i].getCaretShapes(curPos[i]);
119 Shape caret = at.createTransformedShape(shapes[0]);
120
121 g2.setColor(BLACK);
122 layouts[i].draw(g2, rx, ry);
123 g2.draw(caret);
124 g2.draw(new Rectangle2D.Float (rx,hy,rw,hh));
125
126 for (int j = 0; j <= layouts[i].getCharacterCount(); j++) {
128 float[] cInfo = layouts[i].getCaretInfo(TextHitInfo.leading(j));
129 String str = String.valueOf((int) cInfo[0]);
130 TextLayout tl = new TextLayout (str,smallF,frc);
131 tl.draw(g2, (float) rx+cInfo[0]-tl.getAdvance()/2, hy+hh+tl.getAscent()+1.0f);
132 }
133 }
134 }
135
136
137 public static void main(String argv[]) {
138 createDemoFrame(new Highlighting());
139 }
140 }
141 |
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