Bug 140384

Description Felipe Heidrich 2006-05-05 11:47:09 EDT

Build id: I20060504-1600

Have a composite and add one (or more) child to it. Hook a file droptarget listener to it and add more children to the composite during the drop callback.
The error depends on the widget you add, if it is a CCombo the application will crash, other widget cause cheese.

Here the snippet:
static void addItem (Composite c, String string) {
	CCombo combo = new CCombo(c, SWT.NONE);
	combo.setItems(new String[] {"win32", "motif", "gtk", "carbon", "photon"});	
	c.layout();
}

public static void main (String [] args) {
	final Display  display = new Display ();
	Shell shell = new Shell (display);
	shell.setLayout(new FillLayout());
	final Composite c = new Composite(shell, SWT.BORDER);
	c.setLayout(new RowLayout());
	addItem (c, "initial item");
	
	display.addFilter(SWT.KeyDown, new Listener() {
		public void handleEvent(Event event) {
			if (event.keyCode == SWT.F2) {
				String[] files = {"File 0", "File 1", "File 2", "File 3", "File 4"};
				for (int i = 0; i < files.length; i++) {
					addItem (c, files[i]);
				}
			}
		}
	});
	
	int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT; 
	DropTarget target = new DropTarget(c, operations); 
	final FileTransfer fileTransfer = FileTransfer.getInstance(); 
	Transfer[] types = new Transfer[] {fileTransfer};
	target.setTransfer(types); 		  
	target.addDropListener(new DropTargetAdapter() {
		public void drop(DropTargetEvent event) {
			if (fileTransfer.isSupportedType(event.currentDataType)) {
				String[] files = (String[]) event.data;
				for (int i = 0; i < files.length; i++) {
					addItem (c, files[i]);
				}
			}	
		}
	});

	shell.setSize(550, 380);
	shell.open ();
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch()) {
			display.sleep ();
		}
	}
	display.dispose ();
}