Java Developer's Companion/Java Developer's Companion.iso/documentation/tutorial/ui/drawing/example/FontDemo.java

Java Source | 1997-07-13 | 5.1 KB | 154 lines

/*
 * Copyright (c) 1995-1997 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * 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.applet.Applet;

/*
 * This is like the ShapesDemo applet, except that it handles fonts more
 * carefully.
 */

public class FontDemo extends Applet {
    final static int maxCharHeight = 15;

    public void init() {
        validate();
    }

    public void paint(Graphics g) {
        Dimension d = size();
        int x = 5;
        int y = 7;

        Color bg = getBackground();
        Color fg = getForeground();

        int gridWidth = d.width / 7;
        int gridHeight = d.height / 2;
        int stringY;
        int rectWidth = gridWidth - 2*x;
        int rectHeight;

        boolean fontFits = false;
        Font font = g.getFont();
        FontMetrics fontMetrics = g.getFontMetrics();
        while (!fontFits) {
            if ((fontMetrics.getHeight() <= maxCharHeight)
                && (fontMetrics.stringWidth("drawRoundRect()")
                    <= gridWidth)) {
                fontFits = true;
            } else {
            //At first, accidentally left out "g.", which worked
            //but fontMetrics never changed.
                g.setFont(font = new Font(font.getName(),
                                            font.getStyle(),
                                        font.getSize() - 1));
                fontMetrics = g.getFontMetrics();
            }
        }

        stringY = gridHeight - 5 - fontMetrics.getDescent();
        rectHeight = stringY - fontMetrics.getMaxAscent() - y - 2;

        g.setColor(bg);
        g.draw3DRect(0, 0, d.width - 1, d.height - 1, true);
        g.draw3DRect(3, 3, d.width - 7, d.height - 7, false);
        g.setColor(fg);

        // drawLine()
        g.drawLine(x, y+rectHeight-1, x + rectWidth, y); // x1, y1, x2, y2
        g.drawString("drawLine()", x, stringY);
        x += gridWidth;

        // drawRect()
        g.drawRect(x, y, rectWidth, rectHeight); // x, y, width, height
        g.drawString("drawRect()", x, stringY);
        x += gridWidth;

        // draw3DRect()
        g.setColor(bg);
        g.draw3DRect(x, y, rectWidth, rectHeight, true);
        g.setColor(fg);
        g.drawString("draw3DRect()", x, stringY);
        x += gridWidth;

        // drawRoundRect()
        g.drawRoundRect(x, y, rectWidth, rectHeight, 10, 10); // x, y, w, h, arcw, arch
        g.drawString("drawRoundRect()", x, stringY);
        x += gridWidth;

        // drawOval()
        g.drawOval(x, y, rectWidth, rectHeight); // x, y, w, h
        g.drawString("drawOval()", x, stringY);
        x += gridWidth;

        // drawArc()
        g.drawArc(x, y, rectWidth, rectHeight, 90, 135); // x, y, w, h
        g.drawString("drawArc()", x, stringY);
        x += gridWidth;

        // drawPolygon()
        Polygon polygon = new Polygon();
        polygon.addPoint(x, y);
        polygon.addPoint(x+rectWidth, y+rectHeight);
        polygon.addPoint(x, y + rectHeight);
        polygon.addPoint(x + rectWidth, y);
        g.drawPolygon(polygon);
        g.drawString("drawPolygon()", x, stringY);

        x = 5 + gridWidth;
        y += gridHeight;
        stringY += gridHeight;

        // fillRect()
        g.fillRect(x, y, rectWidth, rectHeight); // x, y, width, height
        g.drawString("fillRect()", x, stringY);
        x += gridWidth;

        // fill3DRect()
        g.setColor(bg);
        g.fill3DRect(x, y, rectWidth, rectHeight, true);
        g.setColor(fg);
        g.drawString("fill3DRect()", x, stringY);
        x += gridWidth;

        // fillRoundRect()
        g.fillRoundRect(x, y, rectWidth, rectHeight, 10, 10); // x, y, w, h, arcw, arch
        g.drawString("fillRoundRect()", x, stringY);
        x += gridWidth;

        // fillOval()
        g.fillOval(x, y, rectWidth, rectHeight); // x, y, w, h
        g.drawString("fillOval()", x, stringY);
        x += gridWidth;

        // fillArc()
        g.fillArc(x, y, rectWidth, rectHeight, 90, 135); // x, y, w, h
        g.drawString("fillArc()", x, stringY);
        x += gridWidth;

        // fillPolygon()
        Polygon filledPolygon = new Polygon();
        filledPolygon.addPoint(x, y);
        filledPolygon.addPoint(x+rectWidth, y+rectHeight);
        filledPolygon.addPoint(x, y+rectHeight);
        filledPolygon.addPoint(x+rectWidth, y);
        g.fillPolygon(filledPolygon);
        g.drawString("fillPolygon()", x, stringY);
    }
}