public int[] getSlotItemIDs() {
		Vector<Integer> v = new Vector<Integer>();
		for (Widget slot : getSlotWidgets()) {
			int i = slot.getParentId();
			if (i != -1) {
				v.add(i);
			}
		}
		int[] ia = new int[v.size()];
		int index = 0;
		for (int i : v) {
			ia[index] = i;
			index++;
		}
		return ia;
	}