examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet151.java

/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * Create a virtual table and add 1000 entries to it every 500 ms.
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.0
 */
import java.util.*;

import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet151 {

static int[] data = new int[0];

public static void main (String [] args) {
	final Display display = new Display ();
	Shell shell = new Shell (display);
	shell.setText("Snippet 151");
	shell.setLayout(new FillLayout());
	final Table table = new Table(shell, SWT.BORDER | SWT.VIRTUAL);
	table.addListener(SWT.SetData, e -> {
		TableItem item = (TableItem)e.item;
		int index = table.indexOf(item);
		item.setText("Item "+data[index]);
	});
	Thread thread = new Thread() {
		@Override
		public void run() {
			int count = 0;
			Random random = new Random();
			while (count++ < 500) {
				if (table.isDisposed()) return;
				// add 10 random numbers to array and sort
				int grow = 10;
				int[] newData = new int[data.length + grow];
				System.arraycopy(data, 0, newData, 0, data.length);
				int index = data.length;
				data = newData;
				for (int j = 0; j < grow; j++) {
					data[index++] = random.nextInt();
				}
				Arrays.sort(data);
				display.syncExec(() -> {
					if (table.isDisposed()) return;
					table.setItemCount(data.length);
					table.clearAll();
				});
				try {Thread.sleep(500);} catch (Throwable t) {}
			}
		}
	};
	thread.start();
	shell.open ();
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}
}