Workshops

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.BusyIndicator;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
 
public class BusyIndicatorApp {
	Shell shell;
	Display display;
 
	public BusyIndicatorApp(Display display) {
		this.display = display;
		shell = new Shell(display);
		shell.setText("BusyIndicator");
	}
 
	private void createGui() {
		shell.setLayout(new FillLayout(SWT.VERTICAL));
		final Text text = new Text(shell, SWT.BORDER);
		text.setText("Standby");
		Button button = new Button(shell, SWT.PUSH);
		button.setText("run");
		button.addSelectionListener(new SelectionAdapter() {
 
			@Override
			public void widgetSelected(SelectionEvent e) {
				System.out.println("Button pressed");
				BusyIndicator.showWhile(shell.getDisplay(), new Runnable() {
 
					@Override
					public void run() {
						try {
							// Irgend eine lang laufende Operation innerhalb des UI Threads
							Thread.sleep(50000); //<= Zu lang für Busy Indicator
							// Der ist maximal für 1-2 Sekunden geeignet, sonst friert
							// die Anwendung ein.
							text.setText("Operation abgeschlossen");
						} catch (Exception e2) {}
 
					}
				});
				super.widgetSelected(e);
			}
 
		});
		shell.pack();
	}
 
	public void run() {
		createGui();
		shell.open();
		while(!shell.isDisposed()) {
			if(!display.readAndDispatch()) {
				display.sleep();
			}
		}
 
		display.dispose();
	}
 
	public static void main(String[] args) {
		new BusyIndicatorApp(Display.getDefault()).run();
	}
}

// Irgend eine lang laufende Operation innerhalb des UI Threads
							for(int i = 0; i <= 100; i++) {
								Thread.sleep(10000);
								if(!display.isDisposed()) {
									display.readAndDispatch(); //<Führe aus
								}
							}
 
							//Ist Widget überhaupt noch da?
							if(!text.isDisposed()) {
								text.setText("Operation abgeschlossen");
							}