Name: gsC80088 Date: 02/15/99


When painting an AttributedString to a canvas the characters with superscript and subscript attributes are not displayed correctly. All superscript characters are displayed as normal text. Here is an example of the problem:


import java.awt.*;
import java.awt.font.*;
import java.awt.event.*;
import java.text.AttributedString;
import java.text.AttributedCharacterIterator;

public class styledText extends Canvas {

  TextLayout tl;

    public styledText() {
        setBackground(Color.white);
    }

    public void paint(Graphics g) {
        Graphics2D g2;
        g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                            RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setRenderingHint(RenderingHints.KEY_RENDERING,
                            RenderingHints.VALUE_RENDER_QUALITY);

        Font f = new Font("Serif", Font.PLAIN, 24);
        AttributedString ats = new AttributedString("E=mc2 is Einstein's Equation");
        ats.addAttribute(TextAttribute.FONT, f);
           //the following line should make the "2" superscript
        ats.addAttribute(TextAttribute.SUPERSCRIPT ,TextAttribute.SUPERSCRIPT_SUPER, 4, 5);
        ats.addAttribute(TextAttribute.UNDERLINE ,TextAttribute.UNDERLINE_ON, 9, 19);

        AttributedCharacterIterator iter = ats.getIterator();
        FontRenderContext frc = g2.getFontRenderContext();
        tl = new TextLayout(iter, frc);
        g2.setColor(Color.blue);
        tl.draw(g2, (float)50, (float)50);
    }

    public static void main(String s[]) {
        WindowListener l = new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);}
            public void windowClosed(WindowEvent e) {System.exit(0);}
        };

        Frame f = new Frame("2D Text");
        f.addWindowListener(l);
        f.add("Center", new styledText());
        f.pack();
        f.setSize(new Dimension(400, 300));
        f.show();
    }
}
(Review ID: 53696)
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