Java/SWT JFace Eclipse/Focus

Focus Traversal

   <source lang="java">

/******************************************************************************

* Copyright (c) 1998, 2004 Jackwind Li Guojie
* All right reserved. 
* 
* Created on Jan 24, 2004 10:22:42 PM by JACK
* $Id$
* 
* visit: http://www.asprise.ru/swt
*****************************************************************************/

import org.eclipse.swt.SWT; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.KeyListener; import org.eclipse.swt.events.TraverseEvent; import org.eclipse.swt.events.TraverseListener; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Canvas; import org.eclipse.swt.widgets.rubo; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.List; import org.eclipse.swt.widgets.Shell; public class FocusTraversal {

 Display display = new Display();
 Shell shell = new Shell(display);
 public FocusTraversal() {
   init();
   shell.pack();
   shell.open();
   //textUser.forceFocus();
   // Set up the event loop.
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       // If no more entries in event queue
       display.sleep();
     }
   }
   display.dispose();
 }
 private void init() {
   shell.setLayout(new RowLayout());
   
   Composite composite1 = new Composite(shell, SWT.BORDER);
   composite1.setLayout(new RowLayout());
   composite1.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
   
   Button button1 = new Button(composite1, SWT.PUSH);
   button1.setText("Button1");
   
   List list = new List(composite1, SWT.MULTI | SWT.BORDER);
   list.setItems(new String[]{"Item-1", "Item-2", "Item-3"});
   
   Button radioButton1 = new Button(composite1, SWT.RADIO);
   radioButton1.setText("radio-1");
   Button radioButton2 = new Button(composite1, SWT.RADIO);
   radioButton2.setText("radio-2");
   
   Composite composite2 = new Composite(shell, SWT.BORDER);
   composite2.setLayout(new RowLayout());
   composite2.setBackground(display.getSystemColor(SWT.COLOR_GREEN));
   
   Button button2 = new Button(composite2, SWT.PUSH);
   button2.setText("Button2");
   
   final Canvas canvas = new Canvas(composite2, SWT.NULL);
   canvas.setSize(50, 50);
   canvas.setBackground(display.getSystemColor(SWT.COLOR_YELLOW));
   Combo combo = new Combo(composite2, SWT.DROP_DOWN);
   combo.add("combo");
   combo.select(0);
   
   canvas.addKeyListener(new KeyListener() {
     public void keyPressed(KeyEvent e) {
       GC gc = new GC(canvas);
       // Erase background first. 
       Rectangle rect = canvas.getClientArea();
       gc.fillRectangle(rect.x, rect.y, rect.width, rect.height);
       
       Font font = new Font(display, "Arial", 32, SWT.BOLD );
       gc.setFont(font);
       
       gc.drawString("" + e.character, 15, 10);
       
       gc.dispose();
       font.dispose();
     }
     public void keyReleased(KeyEvent e) {
     }
   });
   
   canvas.addTraverseListener(new TraverseListener() {
     public void keyTraversed(TraverseEvent e) {
       if(e.detail == SWT.TRAVERSE_TAB_NEXT ||
           e.detail == SWT.TRAVERSE_TAB_PREVIOUS)
         e.doit = true;
     }
   });
   
   composite1.setTabList(new Control[]{button1, list});
   composite2.setTabList(new Control[]{button2, canvas, combo});
   
   shell.setTabList(new Control[]{composite2, composite1});
 }
 public static void main(String[] args) {
   new FocusTraversal();
 }

}

      </source>