matplotlib/matplotlib — pull request #3502 by blink1073 (2014-09-12 02:39:09+00:00)
Title: Improved selection widget

This is in preparation for enhancing the selection widgets as per #3486.

This expands the new `_Selector` class from #3376 and normalizes the API for the three current selection widgets: `RectangleSelector`, `LassoSelector`, and `SpanSelector`.

The only known API change is that the ignore criteria from the `RectangleSelector` are now used for all three, since they were the most complete and robust.

This also adds tests for all three widgets.