matplotlib-devel

[matplotlib-devel] small backend change

[John H. <jdh...@ac...>]

I just made a minor change in the backend API.  The faceColor argument
(formerly a color arg) for draw_rectangle, draw_arc, etc... is now a
graphics context instance.  I updated all the backends in CVS.  

Unfortunately Jeremy, there now appears to be a bug in wx.  I can't
tell if it was something I did or something that was there already,
because with wx swallowing the exceptions, I can't find it!  I also
added a few more debug print messages to functions that don't have
them already, but still couldn't track it down.  Sorry for the
trouble.

Note to any wx savvy readers!  Jeremy and I have been struggling over
the tendency of wx to eat exceptions in a way that we can't recover.
If anyone knows how to disable this in wxpython, please contact us.

JDH

RE: [matplotlib-devel] small backend change

[David M. <da...@sj...>]

> 
> Note to any wx savvy readers!  Jeremy and I have been struggling over
> the tendency of wx to eat exceptions in a way that we can't recover.
> If anyone knows how to disable this in wxpython, please contact us.
> 
> JDH
> 
> 

This might put you on the right track:
http://lists.wxwindows.org/archive/wxPython-users/msg10801.html

HTH,
David Moore

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[matplotlib-devel] Re: small backend change

[Jeremy O'D. <je...@o-...>]

On Tuesday 10 February 2004 9:30 pm, John Hunter wrote:
> Unfortunately Jeremy, there now appears to be a bug in wx.  I can't
> tell if it was something I did or something that was there already,
> because with wx swallowing the exceptions, I can't find it!  I also
> added a few more debug print messages to functions that don't have
> them already, but still couldn't track it down.  Sorry for the
> trouble.

I have found the location of the error, but have not yet determined how the 
problem arises:

Basically, when savefig() is called by the script, the first draw_rectangle() 
call fails an assert gc.OK() statement. I have not determined why Python is 
not receiving the AssertException - my conjecture is that the call to gc.Ok() 
is causing an exception in the C++ code - I will probably have to use a debug 
version of the wx libraries and a debugger to verify this.

The stack frame when the exception is raised is:

__main__ #40
matplotlib.matlab.savefig #798
matplotlib.backends.backend_wx #812
matplotlib.artist.draw #86
matplotlib.figure._draw #65
matplotlib.artist.draw #86
matplotlib.patches._draw #76
matplotlib.patches._derived_draw #154
matplotlib.backends.backend_wx #403

I'll let you know how I get on...

Jeremy

Re: [matplotlib-devel] small backend change

[Todd M. <jm...@st...>]

On Tue, 2004-02-10 at 16:30, John Hunter wrote:
> I just made a minor change in the backend API.  The faceColor argument
> (formerly a color arg) for draw_rectangle, draw_arc, etc... is now a
> graphics context instance.  I updated all the backends in CVS.  
> 
Hi John,

I'm working with Perry Greenfield's group on a Tkinter/Paint backend for
matplotlib.  I noticed today that the paint facecolor had changed to
black.  Looking into it,  there were a few more edits to
backend_paint.py needed as a result of the interface change above.  I
also noticed that the paint version of draw_polygons needed a little
code to get it working.  Attached is a patch for both.

Regards,
Todd

-- 
Todd Miller <jm...@st...>