Java Tutorial/SWT/SWT Timer

17. Create one repeating timer

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

import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class TimerRepeating {
  public static void main(String[] args) {
    final Display display = new Display();
    final Shell shell = new Shell(display);
    final int time = 500;
    Runnable timer = new Runnable() {
      public void run() {
        Point point = display.getCursorLocation();
        Rectangle rect = shell.getBounds();
        if (rect.contains(point)) {
          System.out.println("In");
        } else {
          System.out.println("Out");
        }
        display.timerExec(time, this);
      }
    };
    display.timerExec(time, timer);
    
    shell.setSize(200, 200);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

17. Create two one shot timers (s)

import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class TimerOneShot2000 {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setSize(200, 200);
    shell.open();
    display.timerExec(2000, new Runnable() {
      public void run() {
        System.out.println("2000");
      }
    });
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}

17. Stop a repeating timer when a button is pressed

/*******************************************************************************
 * 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
 *******************************************************************************/
/*
 * 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.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class TimeStopWhenButtonPressing {
  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();
  }
}