Dynamically filter legends in a chart based on selection from other chart

Hi there,

I have a Bar chart which contains Category, Count of ticket from Tickets table, I also have another Donut chart which has Sub Categories based on Count of Tickets. The requirement is, whenever I choose the particular Category in Bar chart, only the appropriate Sub Categories should be selected in the Donut Chart and I dont want to see other Sub Categories even in the Legend. But now, I see all different Sub Categories are greyed out, and only the Sub Categories which belongs to the respective Category is highlighted.