Issue with rectangle markers under Python 3

[corranwebster]

The following test code from Chaco works under Python 2, but fails under Python 3:

size = (50, 50)
scatterplot = create_scatter_plot(
    data=[range(10), range(10)],
    border_visible=False,
    marker_size=range(1, 11),
)
scatterplot.outer_bounds = list(size)
gc = PlotGraphicsContext(size)
gc.render_component(scatterplot)

the error generated seems to implicate the Python 3 swig bindings (from Travis CI run):

Traceback (most recent call last):
  File "/home/travis/build/enthought/chaco/build/lib.linux-x86_64-3.4/chaco/tests/scatterplot_renderers_test_case.py", line 71, in test_scatter_slow
    gc.render_component(scatterplot)
  File "/home/travis/build/enthought/chaco/build/lib.linux-x86_64-3.4/chaco/plot_graphics_context.py", line 58, in render_component
    component.draw(self, view_bounds=(0, 0, self.width(), self.height()))
  File "/home/travis/build/enthought/chaco/enable/build/lib.linux-x86_64-3.4/enable/component.py", line 424, in draw
    self._draw(gc, view_bounds, mode)
  File "/home/travis/build/enthought/chaco/enable/build/lib.linux-x86_64-3.4/enable/component.py", line 776, in _draw
    self._dispatch_draw(layer, gc, view_bounds, mode)
  File "/home/travis/build/enthought/chaco/enable/build/lib.linux-x86_64-3.4/enable/component.py", line 796, in _dispatch_draw
    handler(gc, view_bounds, mode)
  File "/home/travis/build/enthought/chaco/build/lib.linux-x86_64-3.4/chaco/base_xy_plot.py", line 466, in _draw_plot
    self._draw_component(gc, view_bounds, mode)
  File "/home/travis/build/enthought/chaco/build/lib.linux-x86_64-3.4/chaco/base_xy_plot.py", line 474, in _draw_component
    self._render(gc, pts)
  File "/home/travis/build/enthought/chaco/build/lib.linux-x86_64-3.4/chaco/scatterplot.py", line 482, in _render
    self.custom_symbol, point_mask=self._cached_point_mask)
  File "/home/travis/build/enthought/chaco/build/lib.linux-x86_64-3.4/chaco/scatterplot.py", line 141, in render_markers
    marker.add_to_path(gc, size)
  File "/home/travis/build/enthought/chaco/enable/build/lib.linux-x86_64-3.4/enable/markers.py", line 51, in add_to_path
    self._add_to_path(path, size)
  File "/home/travis/build/enthought/chaco/enable/build/lib.linux-x86_64-3.4/enable/markers.py", line 78, in _add_to_path
    path.rect(-size, -size, size * 2, size * 2)
  File "/home/travis/build/enthought/chaco/enable/build/lib.linux-x86_64-3.4/kiva/agg/agg.py", line 1026, in rect
    def rect(self, *args): return _agg.GraphicsContextArray_rect(self, *args)
NotImplementedError: Wrong number or type of arguments for overloaded function 'GraphicsContextArray_rect'.
  Possible C/C++ prototypes are:
    kiva::graphics_context_base::rect(kiva::rect_type &)
    kiva::graphics_context_base::rect(double,double,double,double)

It should be possible to reduce this to a pure Enable issue.

[jwiggins]

Cannot reproduce.

Enthought Deployment Manager -- https://www.enthought.com
Python 3.6.12 |Enthought, Inc. (x86_64)| (default, Sep 16 2020, 16:27:31) 
[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.42.1)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from chaco.api import create_scatter_plot, PlotGraphicsContext
2021-02-22 18:00:28.243 Python[71798:14869044] ApplePersistenceIgnoreState: Existing state will not be touched. New state will be written to (null)
>>> size = (50, 50)
>>> scatterplot = create_scatter_plot(data=[list(range(10)), list(range(10))], border_visible=False, marker_size=list(range(1,11)))
>>> scatterplot.outer_bounds = list(size)
>>> gc = PlotGraphicsContext(size)
>>> gc.render_component(scatterplot)
>>> gc.save("blah.png")
>>> ^D