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40
41 package java2d.demos.Fonts;
42
43 import static java.awt.Color  .*;
44 import java.awt.*;
45 import java.awt.event.*;
46 import java.awt.font.FontRenderContext ;
47 import java.awt.font.TextLayout ;
48 import java.util.Vector ;
49 import javax.swing.*;
50 import javax.swing.border.*;
51 import javax.swing.event.*;
52 import java2d.AnimatingControlsSurface;
53 import java2d.CustomControls;
54
55
56
57
60 public class AllFonts extends AnimatingControlsSurface {
61
62 private static Vector <Font> fonts = new Vector <Font>();
63 static {
64 GraphicsEnvironment ge =
65 GraphicsEnvironment.getLocalGraphicsEnvironment();
66 for (Font font : ge.getAllFonts()) {
67 if (font.canDisplayUpTo(font.getName()) != 0) {
68 fonts.addElement(font);
69 }
70 }
71 }
72 private int nStrs;
73 private int strH;
74 private int fi;
75 protected int fsize = 14;
76 protected Vector <Font> v = new Vector <Font>();
77
78
79 public AllFonts() {
80 setBackground(WHITE);
81 setSleepAmount(500);
82 setControls(new Component[] { new DemoControls(this) });
83 }
84
85
86 public void handleThread(int state) { }
87
88
89 public void reset(int w, int h) {
90 v.clear();
91 Font f = fonts.get(0).deriveFont(Font.PLAIN,fsize);
92 FontMetrics fm = getFontMetrics(f);
93 strH = (int) (fm.getAscent() + fm.getDescent());
94 nStrs = h/strH + 1;
95 fi = 0;
96 }
97
98
99 public void step(int w, int h) {
100 if (fi < fonts.size()) {
101 v.addElement(fonts.get(fi).deriveFont(Font.PLAIN,fsize));
102 }
103 if (v.size() == nStrs && v.size() != 0 || fi > fonts.size()) {
104 v.removeElementAt(0);
105 }
106 fi = (v.size() == 0) ? 0 : ++fi;
107 }
108
109
110 public void render(int w, int h, Graphics2D g2) {
111
112 g2.setColor(BLACK);
113
114 int yy = (fi >= fonts.size()) ? 0 : h - v.size() * strH - strH/2;
115
116 for (int i = 0; i < v.size(); i++) {
117 Font f = v.get(i);
118 int sw = getFontMetrics(f).stringWidth(f.getName());
119 g2.setFont(f);
120 g2.drawString(f.getName(), (int) (w/2-sw/2),yy += strH);
121 }
122 }
123
124
125 public static void main(String argv[]) {
126 createDemoFrame(new AllFonts());
127 }
128
129
130 static class DemoControls extends CustomControls implements ActionListener, ChangeListener {
131
132 AllFonts demo;
133 JSlider slider;
134 int fsize[] = { 8, 14, 18, 24 };
135 JMenuItem menuitem[] = new JMenuItem[fsize.length];
136 Font font[] = new Font[fsize.length];
137
138
139 public DemoControls(AllFonts demo) {
140 this.demo = demo;
141 setBackground(GRAY);
142
143 int sleepAmount = (int) demo.getSleepAmount();
144 slider = new JSlider(JSlider.HORIZONTAL, 0, 999, sleepAmount);
145 slider.setBorder(new EtchedBorder());
146 slider.setPreferredSize(new Dimension(90,22));
147 slider.addChangeListener(this);
148 add(slider);
149 JMenuBar menubar = new JMenuBar();
150 add(menubar);
151 JMenu menu = (JMenu) menubar.add(new JMenu("Font Size"));
152 for (int i = 0; i < fsize.length; i++) {
153 font[i] = new Font("serif", Font.PLAIN, fsize[i]);
154 menuitem[i] = menu.add(new JMenuItem(String.valueOf(fsize[i])));
155 menuitem[i].setFont(font[i]);
156 menuitem[i].addActionListener(this);
157 }
158 }
159
160
161 public void actionPerformed(ActionEvent e) {
162 for (int i = 0; i < fsize.length; i++) {
163 if (e.getSource().equals(menuitem[i])) {
164 demo.fsize = fsize[i];
165 Dimension d = demo.getSize();
166 demo.reset(d.width, d.height);
167 break;
168 }
169 }
170 }
171
172
173 public void stateChanged(ChangeEvent e) {
174 demo.setSleepAmount(slider.getValue());
175 }
176 }
177 }
178 |
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