CompositeCreateDisposeChildren.java Source code

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Here is the source code for CompositeCreateDisposeChildren.java

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/*******************************************************************************
 * 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.Composite;
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();
    }
}