private void notifyListeners()
	{
		Iterator itr = listeners.entrySet().iterator();
		long timeNow = System.currentTimeMillis();
		
		while (itr.hasNext())
		{
			Map.Entry	me = (Map.Entry) itr.next();
			NotifyInfo	n = (NotifyInfo) me.getValue();
			
			if (trackingDrag) { /* then throttle */
				if ((timeNow-n.lastNotifyTime)>=n.notifyInterval)
					n.lastNotifyTime = timeNow;
				else continue;
			}
			
			((DoubleSliderAdjustmentListener)me.getKey()).adjustmentValueChanged(this);
		}
	}