> I agree that the difference in blocking behavior is still a
> problem. I think that what we should do for now, *if* multiple
> calls to show work on the Mac (which I can't easily test), is
> change the documentation to correspond to the present situation,
> highlighting the real problem of different blocking behavior.
On Mac OS X, the MacOSX native backend supports multiple calls to show(). Each
call to show() blocks, and show() returns when all figures are closed by the
user.
With TkAgg on Mac OS X, the first call to show() blocks, and returns when all
figures are closed by the user. However, subsequent calls to show() return
immediately.
With GtkCairo on Mac OS X, each call to show() blocks, so show() can be called
repeatedly. However, after closing all windows, show() does not return unless
the user presses ctrl-c. This may not be so difficult to fix though. Basically,
we need to keep track of how many windows are open at any given point, and tell
the GTK main loop to exit when the number of windows reaches zero (this is how
the MacOSX native backend does it).
--Michiel.
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