[matplotlib-devel] SpanSelector with gtk3cairo backend

[Arnaud G. <ar...@os...>]

SpanSelector is a powerful widget that allows to define a particular
region in a Figure. Some time ago I switched to python3 and needed to
use gtk3cairo instead of gtkagg; to my knowledge there is still a
message preventing using agg backend with python3. Unfortunately since
then I am not able to use SpanSelector widget with gtk3cairo. For
instance with the example [1], an error message appears:
  File "/usr/lib/python3/dist-packages/matplotlib/widgets.py", line
1197, in update_background
    self.background = self.canvas.copy_from_bbox(self.ax.bbox)
AttributeError: 'FigureCanvasGTK3Cairo' object has no attribute
'copy_from_bbox'
This using version 1.4.2 of matplotlib.

Does exists a way to have SpanSelector operating with gtk3cairo
backend ? I tried to look down to the code of gtkagg but it refers to
the C implementation of the library (_RendererAgg), is there an
equivalent in Cairo ?

Arnaud.

[1] http://matplotlib.org/examples/widgets/span_selector.html