An example of highlighting multiple, discontiguous regions of a text component. : TextPane « Swing JFC « Java






An example of highlighting multiple, discontiguous regions of a text component.

An example of highlighting multiple, discontiguous regions of a text component.
   
/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly 
*/
// MultiHighlight.java
//An example of highlighting multiple, discontiguous regions of a text
//component.
//

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultHighlighter;
import javax.swing.text.Highlighter;
import javax.swing.text.JTextComponent;

public class MultiHighlight implements ActionListener {

  private JTextComponent comp;

  private String charsToHighlight;

  public MultiHighlight(JTextComponent c, String chars) {
    comp = c;
    charsToHighlight = chars;
  }

  public void actionPerformed(ActionEvent e) {
    // highlight all characters that appear in charsToHighlight
    Highlighter h = comp.getHighlighter();
    h.removeAllHighlights();
    String text = comp.getText().toUpperCase();

    for (int j = 0; j < text.length(); j += 1) {
      char ch = text.charAt(j);
      if (charsToHighlight.indexOf(ch) >= 0)
        try {
          h.addHighlight(j, j + 1, DefaultHighlighter.DefaultPainter);
        } catch (BadLocationException ble) {
        }
    }
  }

  public static void main(String args[]) {
    JFrame frame = new JFrame("MultiHighlight");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTextArea area = new JTextArea(5, 20);
    area
        .setText("This is the story\nof the hare who\nlost his spectacles.");
    frame.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);

    JButton b = new JButton("Highlight All Vowels");
    b.addActionListener(new MultiHighlight(area, "aeiouAEIOU"));
    frame.getContentPane().add(b, BorderLayout.SOUTH);
    frame.pack();
    frame.setVisible(true);
  }
}

           
         
    
    
  








Related examples in the same category

1.TextPane SampleTextPane Sample
2.Brower based on JEditorPaneBrower based on JEditorPane
3.JTextPane demo with various format and html loading and renderingJTextPane demo with various format and html loading and rendering
4.Styled TextStyled Text
5.Appending TextPaneAppending TextPane
6.Text Component DisplayText Component Display
7.JTextPane Styles Example 1JTextPane Styles Example 1
8.JTextPane Styles Example 2JTextPane Styles Example 2
9.JTextPane Styles Example 3JTextPane Styles Example 3
10.JTextPane Styles Example 4JTextPane Styles Example 4
11.JTextPane Styles Example 5JTextPane Styles Example 5
12.JTextPane Styles Example 6JTextPane Styles Example 6
13.JTextPane Styles Example 7JTextPane Styles Example 7
14.JTextPane Styles Example 8JTextPane Styles Example 8
15.JTextPane Highlight ExampleJTextPane Highlight Example
16.JTextPane Extended Paragraph Example
17.TextPane ElementsTextPane Elements
18.TextPane Views 2TextPane Views 2
19.List HTML ValuesList HTML Values
20.Show HTML Document
21.Show HTML Views
22.JEditorPane Replace ReaderJEditorPane Replace Reader
23.Bi-Directional TextBi-Directional Text
24.TextPane: DocumentEvent TextPane: DocumentEvent
25.Show how Icons, Components, and text can be added to a JTextPaneShow how Icons, Components, and text can be added to a JTextPane
26.Parentheses matcherParentheses matcher
27.A TabSet in a JTextPaneA TabSet in a JTextPane
28.Extension of JTextPane that allows the user to easily append colored text to the documentExtension of JTextPane that allows the user to easily append colored text to the document
29.An implementation of HighlightPainter that underlines text with a thick lineAn implementation of HighlightPainter that underlines text with a thick line
30.A custom caret classA custom caret class
31.Enumerating the Paragraphs of a JTextPane Component
32.Inserting an Image into a JTextPane Component
33.Inserting a Component into a JTextPane Component
34.Customizing Tab Stops in a JTextPane Component
35.Sharing Styles Between JTextPanes
36.Listing the Styles Associated with a JTextPane
37.Listing the Attributes in a Style
38.Replace style
39.Set logical style; replaces paragraph style's parent
40.Get logical style and restore it after new paragraph style
41.Determining If a Style Attribute Applies to a Character or the Paragraph
42.Determine if the attribute is a color or a font-related attribute.
43.Create a tab set from the tab stops
44.Foreground color
45.Background color
46.Change the Font size of JTextPane
47.Font family
48.Bold style
49.An example of several text components including password fields and formatted fields.An example of several text components including password fields and formatted fields.
50.A style can have multiple attributes; this one makes text bold and italic
51.Duplicate style
52.Italicize the entire paragraph containing the position 12
53.Inserting Styled Text in a JTextPane Component
54.A separation of a data from the visual representation. In a JTextPane component, we have a StyledDocument for setting the style of the text data.
55.Tests two attributed strings for equality.
56.Get Leading White Space
57.Get Leading White Space Width
58.Get Max Fitting FontSize
59.Reads a AttributedString object that has been serialised by the SerialUtilities.writeAttributedString(AttributedString, ObjectOutputStream)} method.