PyGame mouse click interaction #3
Description
Right now the only interaction is the left and right keys to move between adjacent trees. We could also support mouse clicking on a section of the genome, and switching to that marginal tree.
I would also like to develop some operations of clicking on the tree. Right now, what I'm thinking is that clicking on a part of the tree will highlight / colour the subtree that is below that node / branch. I would additionally like to show in the genomic view how long this tree lasts for -- defined as how long that node continues to be ancestral in the tree sequence, with the exact same set of samples underneath.