/*
* @(#)SymbolTest.java 1.2 98/12/10
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
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 = 0x0370;
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=0x0370"));
}
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;
}
}
}
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