home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Programming Languages Suite
/
ProgLangD.iso
/
VCAFE.3.0A
/
Sample.bin
/
SymbolTest.java
< prev
next >
Wrap
Text File
|
1998-09-15
|
5KB
|
150 lines
/*
* @(#)SymbolTest.java 1.1 98/07/18
*
* Copyright (c) 1995-1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
public class SymbolTest extends Applet implements ActionListener, ItemListener {
SymbolCanvas symbols;
TextField baseText;
static final int SYMBOL_BASE = 0x2200;
static final int DINGBAT_BASE = 0x2700;
static final int GREEK_BASE = 0x3300;
public void init() {
setLayout(new BorderLayout());
Panel panel = new Panel();
panel.add(new Label("Font:"));
Choice fontList = new Choice();
String[] fontNames = getToolkit().getFontList();
for (int i = 0; i < fontNames.length; i++) {
fontList.addItem(fontNames[i]);
}
fontList.addItemListener(this);
panel.add(fontList);
Font defaultFont = new Font(fontNames[0], Font.PLAIN, 16);
panel.add(new Label("Unicode base:"));
baseText = new TextField(Integer.toHexString(DINGBAT_BASE), 4);
baseText.setFont(new Font("Monospaced", Font.PLAIN, 12));
baseText.addActionListener(this);
panel.add(baseText);
add("North", panel);
ScrollPane sp = new ScrollPane();
symbols = new SymbolCanvas(defaultFont, DINGBAT_BASE);
sp.add(symbols);
add("Center", sp);
add("South", new Label("Symbols=0x2200, Dingbats=0x2700, Greek=0x3300"));
}
public void itemStateChanged(ItemEvent e) {
if (e.getStateChange() == ItemEvent.SELECTED) {
String fontName = (String)e.getItem();
symbols.setFont(new Font(fontName, Font.PLAIN, 16));
}
}
public void actionPerformed(ActionEvent e) {
try {
int newBase = Integer.valueOf(e.getActionCommand(), 16).intValue();
symbols.setBase(newBase);
} catch (NumberFormatException nfe) {
Toolkit.getDefaultToolkit().beep();
baseText.select(0, Integer.MAX_VALUE);
}
}
/*
* This class demonstrates how adapter classes can be used to avoid
* creating empty methods to satisfy an event listener interface.
* Being a nested class, a separate class file won't be created
* (which would be overkill for implementing this functionality).
*/
static class MyAdapter extends WindowAdapter {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
}
public static void main(String args[]) {
Frame f = new Frame("SymbolTest");
SymbolTest symbolTest = new SymbolTest();
symbolTest.init();
symbolTest.start();
f.add("Center", symbolTest);
f.pack();
f.setSize(400, 500);
f.show();
f.addWindowListener(new MyAdapter());
}
}
class SymbolCanvas extends Canvas {
Font font;
int charHeight;
int charWidth;
int charBase;
public SymbolCanvas(Font font, int base) {
FontMetrics fm = Toolkit.getDefaultToolkit().getFontMetrics(font);
charHeight = fm.getHeight() + 3;
charWidth = fm.getMaxAdvance() + 4;
charBase = base;
setSize(charWidth * 16 + 60, charHeight * 16 + 10);
}
public void setBase(int base) {
charBase = base;
repaint();
}
public void setFont(Font font) {
this.font = font;
repaint();
}
public void paint(Graphics g) {
g.setFont(font);
g.setColor(Color.black);
char[] carray = new char[1];
int c = charBase;
int y = 20;
for (int v = 0; v < 16; v++) {
g.drawString(Integer.toHexString(c), 10, y);
int x = 60;
for (int h = 0; h < 16; h++) {
carray[0] = (char)c++;
g.drawChars(carray, 0, 1, x, y);
x += charWidth;
}
y += charHeight;
}
}
}