JTextPane and Justified Paragraphs

[Stephan Bardubitzki]

Hi all,

I have to display some formatted paragraphs in a JTextPane. Each paragraph should have a header in bold letters and following some justified text. I can change font style and color, but the justified alignment won't happen with this code:

...
String[] initString = { omitted };
String[] initStyles = { "bold", "justified", "bold", "justified",
                        "bold", "justified", "bold", "justified",
                        "bold", "justified", "bold", "justified",
                        "bold", "justified" };
textPane.setPreferredSize(new Dimension(270,550));
StyledDocument doc = textPane.getStyledDocument();
addStylesToDocument(doc);
try {
     for ( int i = 0; i < initString.length; i++ ) {
         doc.insertString(doc.getLength(), initString[i],
                          doc.getStyle(initStyles[i]));
                
}
...        
 
public void addStylesToDocument(StyledDocument doc) {
     Style def = StyleContext.getDefaultStyleContext()
                             .getStyle(StyleContext.DEFAULT_STYLE);
     Style regular = doc.addStyle("regular", def);
     StyleConstants.setFontFamily(def, "Serif");
     StyleConstants.setFontSize(regular, 12);
     bold = doc.addStyle("bold", regular);
     StyleConstants.setBold(bold, true);
     StyleConstants.setForeground(bold, new Color(90,0,90));
     StyleConstants.setAlignment(bold, StyleConstants.ALIGN_LEFT);
     justified = doc.addStyle("justified", regular);
     StyleConstants.setAlignment(justified, StyleConstants.ALIGN_JUSTIFIED);
     StyleConstants.setForeground(justified, new Color(90,0,90));
}

Any suggestions to solve the task are highly appreciated.

Thanks in advance.
Stephan

[Craig Wood]

import java.awt.*;
import javax.swing.*;
import javax.swing.text.*;
 
public class StyleTest {
    Style bold;
    Style justified;
 
    private JTextPane getTextPane() {
        String[] initString = {
            "This component models paragraphs\n", "that are composed of runs\n",
            "of character level\n", "attributes.\n", "Each paragraph may have a\n",
            "logical style\n", "attached to it\n", "which contains the\n",
            "default attributes\n", "to use\n\n", "if not overridden\n", 
            "by attributes\n", "set on the\n", "paragraph or character run."
        };
        String[] initStyles = { "bold", "justified", "bold", "justified",
                                "bold", "justified", "bold", "justified",
                                "bold", "justified", "bold", "justified",
                                "bold", "justified" };
        JTextPane textPane = new JTextPane();
        textPane.setPreferredSize(new Dimension(270,550));
        StyledDocument doc = textPane.getStyledDocument();
        addStylesToDocument(doc);
        try {
            for ( int i = 0; i < initString.length; i++ ) {
                int pos = doc.getLength();
                doc.insertString(pos, initString[i],
                                 doc.getStyle(initStyles[i]));
                if(initStyles[i].equals("justified")) {
                    Style logicalStyle = doc.getLogicalStyle(pos);
                    doc.setParagraphAttributes(pos, initString[i].length(),
                                               justified, false);
                    doc.setLogicalStyle(pos, logicalStyle);
                }
            }
        } catch(BadLocationException ble) {
            System.out.println("bad location: " + ble.getMessage());
        }
        return textPane;
    }
 
    public void addStylesToDocument(StyledDocument doc) {
        Style def = StyleContext.getDefaultStyleContext()
                            .getStyle(StyleContext.DEFAULT_STYLE);
        Style regular = doc.addStyle("regular", def);
        StyleConstants.setFontFamily(def, "Serif");
        StyleConstants.setFontSize(regular, 12);
        bold = doc.addStyle("bold", regular);
        StyleConstants.setBold(bold, true);
        StyleConstants.setForeground(bold, new Color(90,0,90));
        StyleConstants.setAlignment(bold, StyleConstants.ALIGN_LEFT);
        justified = doc.addStyle("justified", regular);
        StyleConstants.setAlignment(justified, StyleConstants.ALIGN_JUSTIFIED);
        StyleConstants.setForeground(justified, new Color(90,0,90));
    }
 
    public static void main(String[] args) {
        StyleTest test = new StyleTest();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(new JScrollPane(test.getTextPane()));
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    }
}

[Stephan Bardubitzki]

Thank you very much Craig, works like a charm.
Hmmm... the last line of the paragraph should be aligned left. Any ideas?
Sorry, I'm not very familiar with text components.

Stephan