I have two graphs which use the same dataset.
Graph A projects number of persons per country in a pie
Graph B projects number of persons per country per city in a stacked bar chart. The stacks contain the cities.
When selecting a country in Graph A I want to "dim" the non relevant segments in chart B
So it should not be a real drillthrough in Graph B with only the applicable data but , in the users experience, a highlight of the relevant segments