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- /*
- * @(#)SymbolTest.java 1.3 97/02/05
- *
- * 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;
- }
- }
- }
-