org.eclipse.swt.snippets.Snippet68.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet68.java

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/*******************************************************************************
 * 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;

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

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.setText("Snippet 68");
        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() {
            @Override
            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, 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();
    }
}