I have a complex view that queries and presents a lot of news articles depending on
month contextual filter arguments. Everything works fine so far. However, now I want to show kind of context menu next to the view result that looks like this (shows multiple screens with different menu content depending on current display):
What is the best/most elegant way to realize such a context menu? (no ugly hacks)
What I've already tried
I tried to accomplish that using the Views UI – no luck. Creating two different View blocks (one for a list of years and one for the months of currently selected year) didn't work, because in order to get a distinct result set I need identical fields that are used for "collapsing". The field I used was "Post date" – and this always differs.
I guess that I must write a custom module where I leverage the Views API and create that markup for the context menu. But where do I start? And how can obtain the current contextual filter arguments?