DRAG AND DROP

General
1

Hai,
am trying to impliment drag&drop component inside another drag&drop
some thing like bukket in a bukket when i select the inner component the outer componet also selecting after drop how to avoid this ?
when inner layers selection i need to select only inner child component when iam selecting parent i need to select all like
private Component createComponentParent() {
Component result = null;
if (type == PaletteItemType.IF) {
result = new child()
}
return result;
}
child() is anothe component with drag and drop capacity

2 
final DragAndDropWrapper ddWrap = new DragAndDropWrapper(caption);
        ddWrap.setSizeUndefined();
        ddWrap.setDragStartMode(DragStartMode.WRAPPER);
        ddWrap.setData(type);
        return ddWrap;

we can avoid this selection problem with usage of DragStartMode.WRAPPER and DragStartMode.NONE

private class WrappedComponent extends DragAndDropWrapper {

            public WrappedComponent(final Component content) {
                super(content);

                ((AbstractOrderedLayout) content).addLayoutClickListener(new LayoutClickListener() {
                    @Override
                    public void layoutClick(final LayoutClickEvent event) {
                        setDragStartMode(DragStartMode.WRAPPER);
                        logger.info("CLICKED HERE");
                    }
                });
                setDragStartMode(DragStartMode.NONE);

            }