Bug 365097

Description Andrei Diaconu 2011-11-29 11:41:37 EST

In the snippet below, just click anywhere inside the shell.

The shell will deactivate itself and no event will be generated. After this, the shell is in a strange state: you need to click twice on content area to activate it. Even clicking on the close button has no effect (first click).

In the console you will see that the shell is activated twice, without being first deactivated.

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.*;

public class IncorrectDeactivateWithNoEvent {

	public static void main(String[] args) {
		final Display display = new Display();
		final Shell shell = new Shell(display);
		shell.addListener(SWT.MouseUp, new Listener() {
			@Override
			public void handleEvent(Event event) {
				final Shell invisibleShell = new Shell();
				invisibleShell.setLayout(new FillLayout());
				final Composite composite = new Composite(invisibleShell, SWT.NONE);
				final Image image = new Image(display, 1, 1);
				final GC gc = new GC(image);
				composite.print(gc);
				gc.dispose();
				invisibleShell.dispose();
				image.dispose();
				shell.removeListener(SWT.MouseUp, this);
			}
		});
		final Listener listener = new Listener() {
			@Override
			public void handleEvent(Event event) {
				switch (event.type) {
					case SWT.Activate:
						System.out.println("activated");
						break;
					case SWT.Deactivate:
						System.out.println("deactivated");
						break;
				}
			}
		};
		shell.addListener(SWT.Activate, listener);
		shell.addListener(SWT.Deactivate, listener);
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
		display.dispose();
	}
}