"Lasso" tool is broken with NumPy 1.10

[andrewcollette]

The regression.py and scatter.py demos work with NumPy 1.8, but on NumPy 1.10 they produce the following output:

Traceback (most recent call last):
  File "build/bdist.macosx-10.6-x86_64/egg/enable/qt4/base_window.py", line 225, in mouseReleaseEvent
  File "build/bdist.macosx-10.6-x86_64/egg/enable/qt4/base_window.py", line 114, in mouseReleaseEvent
  File "build/bdist.macosx-10.6-x86_64/egg/enable/abstract_window.py", line 348, in _handle_mouse_event
  File "build/bdist.macosx-10.6-x86_64/egg/enable/component.py", line 918, in dispatch
  File "build/bdist.macosx-10.6-x86_64/egg/enable/component.py", line 958, in _new_dispatch
  File "build/bdist.macosx-10.6-x86_64/egg/enable/container.py", line 514, in _dispatch_stateful_event
  File "build/bdist.macosx-10.6-x86_64/egg/enable/component.py", line 918, in dispatch
  File "build/bdist.macosx-10.6-x86_64/egg/enable/component.py", line 946, in _new_dispatch
  File "build/bdist.macosx-10.6-x86_64/egg/enable/interactor.py", line 94, in dispatch
  File "build/bdist.macosx-10.6-x86_64/egg/enable/interactor.py", line 110, in _dispatch_stateful_event
  File "build/bdist.macosx-10.6-x86_64/egg/chaco/tools/lasso_selection.py", line 159, in selecting_left_up
  File "build/bdist.macosx-10.6-x86_64/egg/chaco/tools/lasso_selection.py", line 172, in selecting_mouse_up
  File "build/bdist.macosx-10.6-x86_64/egg/chaco/tools/lasso_selection.py", line 274, in _update_selection
TypeError: ufunc 'bitwise_or' output (typecode 'i') could not be coerced to provided output parameter (typecode '?') according to the casting rule ''same_kind''

This is with Chaco "4.6.0.dev123-1" and NumPy "1.10.4-1". Demos in question are here:

http://docs.enthought.com/chaco/user_manual/annotated_examples.html#regression-py

[andrewcollette]

On NumPy 1.7.1, this is also observed:

/Users/acollette/Documents/development/irig/.devenv/lib/python2.7/site-packages/chaco/tools/lasso_selection.py:274: DeprecationWarning: Implicitly casting between incompatible kinds. In a future numpy release, this will raise an error. Use casting="unsafe" if this is intentional.

[corranwebster]

Underlying issue is with enable/kiva/agg wrapping code where points_in_polygon returns an array of int. Two-phase fix should be:

• a band-aid in Chaco where we do astype(bool).
• a proper fix in kiva where we return an array of dtype bool form points_in_polygon