Docjar: Interface/LimitedStyledDocument.java

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Source code: Interface/LimitedStyledDocument.java

1   package Interface;
2   
3   /*
4    * LimitedStyledDocument.java
5    *
6    * Created on 17 August 2002, 15:44
7    */
8   
9   /*
10   * Adapted from K.Walrath, M.Campione, "The JFC Swing Tutorial", 
11   * Addison-Wesley Longman Inc., 1999
12   * Page 675-676
13   */
14  
15  import javax.swing.*;
16  import javax.swing.text.*;
17  import java.awt.Toolkit;
18  
19  public class LimitedStyledDocument extends DefaultStyledDocument{
20      
21      int maxchars;
22      
23      /** Creates new ReadingFiles */
24      public LimitedStyledDocument(int maxchar) {
25          maxchars = maxchar;
26      }
27      
28      /* Rejects the entire insertion of text if contents too long */
29      public void insertString(int offs, String str, AttributeSet a) throws 
30      BadLocationException
31      {        
32          if ((getLength() + str.length()) <= maxchars)
33              super.insertString(offs, str, a);
34          else
35              Toolkit.getDefaultToolkit().beep();        
36      }    
37  }