[news.eclipse.platform.swt] Missing ModifyEvent after switching parents

[Johannes Böttcher <johnny_b81@xxxxxxxxxxx>]

Hi,

I have a problem with missing ModifyEventCalls after switching the 
parent of a control from one to another shell with setParent() and 
diposing the old shell.

my scenario:
create shell
create Text
create new shell
switch parent of control from shell to new shell
dispose shell

the ModifyListener is still there, but no ModifyEvent(SWT.Modify) is 
thrown. When I didn't dispose the old shell, everthing works fine...
the weird thing is that other listeners, like focus- and verifylistener 
are still working correctly.

is there an intention for this behavior? why? is something missing by 
creating the new shell?

here some code to illustrate the problem:

public static void main(String[] args) throws Exception {
	Display.getDefault().addFilter(SWT.Modify, new Listener() {

		public void handleEvent(Event event) {
			System.out.println("Modify");
		}

	});
	Shell shell = new Shell(Display.getDefault());
	shell.setSize(1000, 700);
	shell.setText("OldShell");
	shell.setLayout(new FillLayout());
	final Text t = new Text(shell, SWT.SINGLE | SWT.BORDER);
	t.addModifyListener(new ModifyListener() {

		public void modifyText(ModifyEvent e) {
			System.out.println("Text modified");
		}

	});
	t.addFocusListener(new FocusListener() {

		public void focusGained(FocusEvent e) {
			System.out.println("focus gained");
		}

		public void focusLost(FocusEvent e) {
			System.out.println("focus lost");
		}

	});
	t.addVerifyListener(new VerifyListener() {

		public void verifyText(VerifyEvent e) {
			System.out.println("verified");
		}

	});

	for (Listener l : t.getListeners(SWT.Modify))
		System.out.println(l);

	/* alternativ 1: start */
	// 	shell.open();
	//	while (!shell.isDisposed()) {
	//		if (!Display.getDefault().readAndDispatch())
	//				Display.getDefault().sleep();
	//		}
	/* alternativ 1: end */


	/* alternative 2: start */
	Shell newShell = new Shell(Display.getDefault());
	t.setParent(newShell);
	Button b = new Button(newShell, SWT.PUSH);
	b.addSelectionListener(new SelectionListener() {
	public void widgetDefaultSelected(SelectionEvent e) {
		// TODO Auto-generated method stub
	}
	public void widgetSelected(SelectionEvent e) {
		System.out.println("entered string: " + t.getText());
	}
	});

	shell.dispose();
	newShell.setText("NewShell");
	newShell.setLayout(new FillLayout());
	newShell.setSize(300, 200);
	newShell.open();
	while (!newShell.isDisposed()) {
		if (!Display.getDefault().readAndDispatch())
			Display.getDefault().sleep();
	}
	/* alternative 2: end */
	Display.getDefault().dispose();
	System.exit(0);
}

thanks, Johannes