public void menuAboutToShow(IMenuManager manager) {
		IContributionItem[] items = manager.getItems();
		
		for (int i = 0; i < items.length; i++) {
			String id = items[i].getId();
			boolean state;
			if(id.equals("se.fnord.ecalc.actions.displayhex")) {
				IAction a = ((ActionContributionItem)items[i]).getAction();
				if (displayRadix == RADIX_HEX)
					state = true;
				else
					state = false;
				a.setChecked(state);
			}
			else if(id.equals("se.fnord.ecalc.actions.displaydec")) {
				IAction a = ((ActionContributionItem)items[i]).getAction();
				if (displayRadix == RADIX_DEC)
					state = true;
				else
					state = false;
				a.setChecked(state);
			}
			else if(id.equals("se.fnord.ecalc.actions.displayoct")) {
				IAction a = ((ActionContributionItem)items[i]).getAction();
				if (displayRadix == RADIX_OCT)
					state = true;
				else
					state = false;
				a.setChecked(state);
			}
			else if(id.equals("se.fnord.ecalc.actions.displaybin")) {
				IAction a = ((ActionContributionItem)items[i]).getAction();
				if (displayRadix == RADIX_BIN)
					state = true;
				else
					state = false;
				a.setChecked(state);
			}
			else if(id.equals("se.fnord.ecalc.actions.forcetypeaction.doubletype")) {
				IAction a = ((ActionContributionItem)items[i]).getAction();
				if (context.arithmeticType == IValue.TYPE_DOUBLE)
					state = true;
				else
					state = false;
				a.setChecked(state);
			}
			else if(id.equals("se.fnord.ecalc.actions.forcetypeaction.inttype")) {
				IAction a = ((ActionContributionItem)items[i]).getAction();
				if (context.arithmeticType == IValue.TYPE_LONG)
					state = true;
				else
					state = false;
				a.setChecked(state);
			}
			else if(id.equals("se.fnord.ecalc.actions.forcetypeaction.autotype")) {
				IAction a = ((ActionContributionItem)items[i]).getAction();
				if (context.arithmeticType == IValue.TYPE_AUTO)
					state = true;
				else
					state = false;
				a.setChecked(state);
			}	
		}
		
		manager.removeMenuListener(this);
	}