accessibilitydemo8.java

来自「java 完全探索的随书源码」· Java 代码 · 共 71 行

// AccessibilityDemo8.java

import javax.accessibility.*;

import javax.swing.*;

import java.awt.*;
import java.awt.event.*;

class AccessibilityDemo8 extends JFrame
{
   AccessibilityDemo8 (String title)
   {
      super (title);

      addWindowListener (new WindowAdapter ()
                         {
                             public void windowClosing (WindowEvent e)
                             {
                                System.exit (0);
                             }
                         });

      JPanel p = new JPanel ();
      p.setPreferredSize (new Dimension (300, 50));
      JTextField jtf = new JTextField (20);
      jtf.setPreferredSize (new Dimension (100, 20));
      p.add (jtf);

      getContentPane ().add (p);

      pack ();
      setVisible (true);
   }

   public static void main (String [] args)
   {
      AccessibilityDemo8 ad8;
      ad8 = new AccessibilityDemo8 ("Accessibility Demo8");

      try
      {
          Thread.sleep (5000);
      }
      catch (InterruptedException e) {}

      ad8.dumpTextInfo (ad8.getAccessibleContext ());
   }

   void dumpTextInfo (AccessibleContext ac)
   {
      AccessibleText at = ac.getAccessibleText ();

      if (at != null)
      {
          System.out.println ("Caret position = "
                              + at.getCaretPosition ());
          System.out.println ("Selected text = "
                              + at.getSelectedText ());

          return;
      }
            
      int nChildren = ac.getAccessibleChildrenCount ();

      for (int i = 0; i < nChildren; i++)
           dumpTextInfo (ac.getAccessibleChild (i)
                           .getAccessibleContext ());
   }
}