##Apologies I'm sure someone's done something similar - I'm looking for examples of D3-based maps where the map symbology updates based on an unbounded user action. For example:
A user visits the Reindeer Unified Defense Youth (RUDY) homepage. Some simple country boundary TopoJSON loads into memory with one attribute: "# of reindeer":
They're prompted to distribute reindeer to countries where they might be welcome. The user thinks that Norway is a likely prospect, so she clicks repeatedly on the "+" button by Norway, and presently the country fill color changes to reflect the invasion of reindeer, while the surplus reindeer supply ticks down.
My assumptions about the process are:
- The "# of reindeer" attribute of the TopoJSON can be manipulated in-state by some jQuery
- As the user clicks + or - the corresponding math changes the attribute value of the target feature
- D3 has an onclick event that can fire to change a feature's color as it crosses some threshold of deer-inundation
Has anyone done this sort of thing? I'd love to pick it apart if so.