Enhancement: Support touchscreen use

[oracleif]

This could be great on a smartphone or tablet, but as far as I can tell specifically requires a mouse, ignoring on-screen taps. Some of the folks I'd like to share this with don't get to laptops very often, but invariably have a phone in hand.

I'll apologize in advance if this is just my ignorance - if there's an easy way to simulate mouse events on a smartphone touchscreen, that would satisfy this, but I haven't found a solution for that which works on this page.