I have a list containing two types of data elements (say A & B). Some
actions (say 1 & 2) can be performed on Type A only, some (say 3 & 4) on
Type B only and some (say 5 & 6) on both Type A & Type B. What would be the
best UI to display these interactions? It would be awkward if only the
allowed actions are enabled based on the items selected. Its not possible to
separate the two types of data elements.