snippet68.java

Eclipse JAVA开发软件中SWT各控件范例源码

/*******************************************************************************
 * 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
 *******************************************************************************/
package org.eclipse.swt.snippets;
 
/*
 * Display example snippet: stop a repeating timer when a button is pressed
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;

public class Snippet68 {

public static void main (String [] args) {
	final Display display = new Display ();
	final Color red = display.getSystemColor (SWT.COLOR_RED);
	final Color blue = display.getSystemColor (SWT.COLOR_BLUE);
	Shell shell = new Shell (display);
	shell.setLayout (new RowLayout ());
	Button button = new Button (shell, SWT.PUSH);
	button.setText ("Stop Timer");
	final Label label = new Label (shell, SWT.BORDER);
	label.setBackground (red);
	final int time = 500;
	final Runnable timer = new Runnable () {
		public void run () {
			if (label.isDisposed ()) return;
			Color color = label.getBackground ().equals (red) ? blue : red;
			label.setBackground (color);
			display.timerExec (time, this);
		}
	};
	display.timerExec (time, timer);
	button.addListener (SWT.Selection, new Listener () {
		public void handleEvent (Event event) {
			display.timerExec (-1, timer);
		}
	});
	button.pack ();
	label.setLayoutData (new RowData (button.getSize ()));
	shell.pack ();
	shell.open ();
	while (!shell.isDisposed ()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}
}