FontDemo.java Source code

Introduction

Here is the source code for FontDemo.java

Source

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.GraphicsEnvironment;
import java.awt.Toolkit;

import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;

/**
 * Finds and displays available fonts
 * <p>
 * TODO: should be a JTable with the text name in one column and the demo in a
 * JLabel in the other.
 * 
 * @author Ian Darwin (original)
 */
public class FontDemo extends JComponent {
    /** The list of Fonts */
    protected String[] fontNames;

    /** The fonts themselves */
    protected Font[] fonts;

    /** How much space between each name */
    static final int YINCR = 20;

    /**
     * Construct a FontDemo -- Sets title and gets array of fonts on the system
     */
    public FontDemo() {

        Toolkit toolkit = Toolkit.getDefaultToolkit();
        // For JDK 1.1: returns about 10 names (Serif, SansSerif, etc.)
        // fontNames = toolkit.getFontList();
        // For JDK 1.2: a much longer list; most of the names that come
        // with your OS (e.g., Arial, Lucida, Lucida Bright, Lucida Sans...)
        fontNames = GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames();
        fonts = new Font[fontNames.length];
    }

    public Dimension getPreferredSize() {
        return new Dimension(500, fontNames.length * YINCR);
    }

    /**
     * Draws the font names in its font. Called by AWT when painting is needed
     * Does lazy evaluation of Font creation, caching the results (without this,
     * scrolling performance suffers even on a P3-750).
     */
    public void paint(Graphics g) {
        for (int i = 0; i < fontNames.length; i += 1) {
            if (fonts[i] == null) {
                fonts[i] = new Font(fontNames[i], Font.BOLD, 14);
            }
            g.setFont(fonts[i]);
            int x = 20;
            int y = 20 + (YINCR * i);
            g.drawString(fontNames[i], x, y);
        }
    }

    /** Simple main program to start it running */
    public static void main(String[] args) {
        JFrame f = new JFrame("Font Demo");
        f.getContentPane().add(new JScrollPane(new FontDemo()));
        f.setSize(600, 700);
        f.setVisible(true);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}