Java Tutorial/SWT/Composite

Create and dispose children of a composite

   <source lang="java">

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

* Copyright (c) 2000, 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
*     IBM Corporation - initial API and implementation
*******************************************************************************/

/*

* Composite example snippet: create and dispose children of a composite
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/

import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableItem; public class CompositeCreateDisposeChildren {

 static int pageNum = 0;
 static Composite pageComposite;
 public static void main(String args[]) {
   Display display = new Display();
   final Shell shell = new Shell(display);
   shell.setLayout(new GridLayout());
   Button button = new Button(shell, SWT.PUSH);
   button.setText("Push");
   pageComposite = new Composite(shell, SWT.NONE);
   pageComposite.setLayout(new GridLayout());
   pageComposite.setLayoutData(new GridData());
   button.addListener(SWT.Selection, new Listener() {
     public void handleEvent(Event event) {
       if ((pageComposite != null) && (!pageComposite.isDisposed())) {
         pageComposite.dispose();
       }
       pageComposite = new Composite(shell, SWT.NONE);
       pageComposite.setLayout(new GridLayout());
       pageComposite.setLayoutData(new GridData());
       if (pageNum++ % 2 == 0) {
         Table table = new Table(pageComposite, SWT.BORDER);
         table.setLayoutData(new GridData());
         for (int i = 0; i < 5; i++) {
           new TableItem(table, SWT.NONE).setText("table item " + i);
         }
       } else {
         new Button(pageComposite, SWT.RADIO).setText("radio");
       }
       shell.layout(true);
     }
   });
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

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