Attachment 237882 Details for Bug 422889 – Test program that demonstrates UI freeze

Test program that demonstrates UI freeze

Bug422889.java (text/x-java), 2.12 KB, created by Richard Fearn

on 2013-11-30 07:08:37 EST

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Filename:

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Creator: Richard Fearn

Created: 2013-11-30 07:08:37 EST

Size: 2.12 KB

patch

obsolete

>import java.util.Timer;
>import java.util.TimerTask;
>
>import org.eclipse.jface.layout.GridDataFactory;
>import org.eclipse.jface.layout.GridLayoutFactory;
>import org.eclipse.swt.SWT;
>import org.eclipse.swt.widgets.Button;
>import org.eclipse.swt.widgets.Display;
>import org.eclipse.swt.widgets.MessageBox;
>import org.eclipse.swt.widgets.Shell;
>
>public class Bug422889 {
>
>	public static void main(String[] args) {
>
>		System.out.println("SWT version: " + SWT.getVersion());
>
>		final Shell shell = new Shell();
>		GridLayoutFactory.swtDefaults().applyTo(shell);
>
>		final Display display = shell.getDisplay();
>
>		final Button button = new Button(shell, SWT.PUSH);
>		button.setText("Hello");
>		GridDataFactory.fillDefaults().grab(true, false).applyTo(button);
>
>		final Timer timer = new Timer();
>		timer.schedule(newThrowExceptionTask(display), 5000);
>		timer.schedule(newOpenMessageBoxTask(shell, display), 10000);
>		timer.schedule(newThrowExceptionTask(display), 15000);
>
>		shell.open();
>		while (true) {
>			try {
>				if (!display.readAndDispatch()) {
>					display.sleep();
>				}
>			} catch (Throwable t) {
>				System.err.println(t);
>			}
>		}
>	}
>
>	private static TimerTask newOpenMessageBoxTask(final Shell shell, final Display display) {
>		return new TimerTask() {
>			@Override
>			public void run() {
>				System.out.println("Requesting message box task to be executed");
>				display.asyncExec(new Runnable() {
>					@Override
>					public void run() {
>						System.out.println("Running message box task in SWT thread");
>						MessageBox messageBox = new MessageBox(shell, SWT.ICON_QUESTION | SWT.YES | SWT.NO);
>						messageBox.setMessage("Popup");
>						messageBox.setText("Popup");
>						messageBox.open();
>					}
>				});
>			}
>		};
>	}
>
>	private static TimerTask newThrowExceptionTask(final Display display) {
>		return new TimerTask() {
>			@Override
>			public void run() {
>				System.out.println("Requesting exception-throwing task to be executed");
>				display.asyncExec(new Runnable() {
>					@Override
>					public void run() {
>						System.out.println("Running exception-throwing task in SWT thread");
>						throw new NullPointerException();
>					}
>				});
>			}
>		};
>	}
>
>}

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Attachments on bug 422889: 237882