Java example source code file (DrawStrSuper.java)

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Java - Java tags/keywords

affinetransform, awt, bufferedimage, component, dimension, drawstrsuper, event, font, frame, geometry, hashmap, image, interruptedexception, override, runner, text, textlayout, thread, util, windowadapter

The DrawStrSuper.java Java example source code

/*
 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/**
 * @test
 * @bug 6684056
 * @summary Super-scripted text needs to be positioned the same with
 *          drawString and TextLayout.
 */
import java.awt.*;
import java.awt.event.*;
import java.awt.font.*;
import static java.awt.font.TextAttribute.*;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.util.HashMap;


public class DrawStrSuper extends Component {

    int angle = 0;
    static boolean interactive = false;

    int wid=400, hgt=400;
    BufferedImage bi = null;

    void paintImage() {

        if (bi == null) {
             bi = new BufferedImage(wid, hgt, BufferedImage.TYPE_INT_RGB);
        }
        Graphics2D g2d = bi.createGraphics();
        g2d.setColor(Color.white);
        g2d.fillRect(0, 0, wid, hgt);
        g2d.translate(200, 200);

        Font fnt = new Font("Arial", Font.PLAIN, 20);
        fnt = fnt.deriveFont(60.0f);
        HashMap attrMap = new HashMap();
        AffineTransform aff =
            AffineTransform.getRotateInstance(angle * Math.PI/180.0);
        attrMap.put(SUPERSCRIPT, SUPERSCRIPT_SUPER);
        attrMap.put(TRANSFORM, aff);
        fnt = fnt.deriveFont(attrMap);

        g2d.setFont(fnt);
        g2d.setColor(Color.yellow);
        TextLayout tl = new TextLayout("Text", fnt,g2d.getFontRenderContext());
        g2d.fill(tl.getBounds());

        g2d.setColor(Color.black);
        g2d.drawLine(-3, 0, 3, 0);
        g2d.drawLine(0, -3, 0, 3);

        g2d.setColor(Color.blue);
        g2d.drawString("Text", 0, 0);

        g2d.setColor(Color.red);
        tl.draw(g2d,0f,0f);

        // Test BI: should be no blue
        int blue = Color.blue.getRGB();
        for (int px=0;px<wid;px++) {
            for (int py=0;py<hgt;py++) {
                int rgb = bi.getRGB(px, py);
                if (rgb == blue) {
                    throw new RuntimeException
                        ("Unexpected color : " + Integer.toHexString(rgb) +
                         " at x=" + px + " y="+ py);
                }
            }
        }
    }

    @Override
    public void paint(Graphics g) {
        paintImage();
        g.drawImage(bi, 0,0, null);
    }


    static class Runner extends Thread {

        DrawStrSuper dss;

        Runner(DrawStrSuper dss) {
            this.dss = dss;
        }

        public void run() {
            while (true) {
                if (!interactive && dss.angle > 360) {
                    return;
                }
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    return;
                }

                dss.angle += 10;
                dss.repaint();
            }
        }
    }

    @Override
    public Dimension getPreferredSize() {
        return new Dimension(400, 400);
    }

    public static void main(String argv[]) throws InterruptedException {
        if (argv.length > 0) interactive = true;

        Frame f = new Frame("Text bounds test");
        f.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        DrawStrSuper dss = new DrawStrSuper();
        f.add(dss, BorderLayout.CENTER);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
        Runner runner = new Runner(dss);
        runner.start();
        runner.join();
    }
}