StylesExample2.java Source code

Introduction

Here is the source code for StylesExample2.java

Source

/*
Core SWING Advanced Programming 
By Kim Topley
ISBN: 0 13 083292 8       
Publisher: Prentice Hall  
*/

import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;

public class StylesExample2 {
    public static void main(String[] args) {
        try {
            UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
        } catch (Exception evt) {
        }

        JFrame f = new JFrame("Styles Example 2");

        // Create the StyleContext, the document and the pane
        StyleContext sc = new StyleContext();
        final DefaultStyledDocument doc = new DefaultStyledDocument(sc);
        JTextPane pane = new JTextPane(doc);

        // Create and add the main document style
        Style defaultStyle = sc.getStyle(StyleContext.DEFAULT_STYLE);
        final Style mainStyle = sc.addStyle("MainStyle", defaultStyle);
        StyleConstants.setLeftIndent(mainStyle, 16);
        StyleConstants.setRightIndent(mainStyle, 16);
        StyleConstants.setFirstLineIndent(mainStyle, 16);
        StyleConstants.setFontFamily(mainStyle, "serif");
        StyleConstants.setFontSize(mainStyle, 12);

        // Create and add the constant width style
        final Style cwStyle = sc.addStyle("ConstantWidth", null);
        StyleConstants.setFontFamily(cwStyle, "monospaced");
        StyleConstants.setForeground(cwStyle, Color.green);

        // Create and add the heading style
        final Style heading2Style = sc.addStyle("Heading2", null);
        StyleConstants.setForeground(heading2Style, Color.red);
        StyleConstants.setFontSize(heading2Style, 16);
        StyleConstants.setFontFamily(heading2Style, "serif");
        StyleConstants.setBold(heading2Style, true);
        StyleConstants.setLeftIndent(heading2Style, 8);
        StyleConstants.setFirstLineIndent(heading2Style, 0);

        try {
            SwingUtilities.invokeAndWait(new Runnable() {
                public void run() {
                    try {
                        // Set the logical style
                        doc.setLogicalStyle(0, mainStyle);

                        // Add the text to the document
                        doc.insertString(0, text, null);

                        // Apply the character attributes
                        doc.setCharacterAttributes(49, 13, cwStyle, false);
                        doc.setCharacterAttributes(223, 14, cwStyle, false);
                        doc.setCharacterAttributes(249, 14, cwStyle, false);
                        doc.setCharacterAttributes(286, 8, cwStyle, false);
                        doc.setCharacterAttributes(475, 14, cwStyle, false);
                        doc.setCharacterAttributes(497, 21, cwStyle, false);
                        doc.setCharacterAttributes(557, 9, cwStyle, false);
                        doc.setCharacterAttributes(639, 12, cwStyle, false);
                        doc.setCharacterAttributes(733, 21, cwStyle, false);
                        doc.setCharacterAttributes(759, 9, cwStyle, false);

                        // Finally, apply the style to the heading
                        doc.setParagraphAttributes(0, 1, heading2Style, false);
                    } catch (BadLocationException e) {
                    }
                }
            });
        } catch (Exception e) {
            System.out.println("Exception when constructing document: " + e);
            System.exit(1);
        }

        f.getContentPane().add(new JScrollPane(pane));
        f.setSize(400, 300);
        f.setVisible(true);
    }

    public static final String text = "Attributes, Styles and Style Contexts\n"
            + "The simple PlainDocument class that you saw in the previous "
            + "chapter is only capable of holding text. The more complex text "
            + "components use a more sophisticated model that implements the "
            + "StyledDocument interface. StyledDocument is a sub-interface of "
            + "Document that contains methods for manipulating attributes that "
            + "control the way in which the text in the document is displayed. "
            + "The Swing text package contains a concrete implementation of "
            + "StyledDocument called DefaultStyledDocument that is used as the "
            + "default model for JTextPane and is also the base class from which "
            + "more specific models, such as the HTMLDocument class that handles "
            + "input in HTML format, can be created. In order to make use of "
            + "DefaultStyledDocument and JTextPane, you need to understand how "
            + "Swing represents and uses attributes.\n";

}