On Mon, Jul 12, 2010 at 6:39 PM, João Luís Silva <jsi...@fc.up.pt> wrote:
>
>
> John Hunter wrote:
>>
>> On Mon, Jul 12, 2010 at 5:58 PM, João Luís Silva
>> <jsilva-bxeiay08...@public.gmane.org> wrote:
>>>
>>> Hi,
>>>
>>> I've finally created a small script that demonstrates a bug that I've
>>> been
>>> enduring for a long time. I haven't seen it reported before, so I may be
>>> doing something wrong. The bug is as follows: Under certain conditions,
>>> in
>>> an embedded gtk application, when selecting an area with the "Zoom to
>>> rectangle" button from the toolbar the whole graph will jump upward
>>> temporarily, corrupting the screen and making it hard to select the
>>> proper
>>> area. The attached example is an extreme version of this (the effect
>>> would
>>> be smaller for a reasonably sized combo box).
>>>
>>> Tested on Linux (Debian Squeeze).
>>
>>
>> You have this line:
>>
>>  from widgets import Widgets
>>
>> what is "widgets"  ?
>>
>> JDH
>>
>
> Sorry, I forgot to delete it. It's just a small helper class I use to load
> files from glade. By the way, I just tested the script on Windows (after
> deleting that line) and it doesn't have the bug (Python 2.5 + mpl 1.0.0)

I also see buggy behavior, but on my ubuntu linux system I see that
the whole subplot gets painted black on a mouse press and remains so
while the rubber-banding is in effect.  It's not strictly black, but
it looks like blackish bit noise.  I also notice if I don't add the
combobox to the vbox, I have no problem.  But I don't see that the
"plot moves"....

It;s somewhat reminiscent of this pixel noise I once reported working
on another gtkagg problem.

Interestingly, I'm seeing the same behavior with backend gtk and gtkagg.

All of which is discouraging: we both see bugs but different ones on
linux, the appearance of the bug is caused by adding a combobox which
is not used (on my system), the bug appears on some platforms (linux)
but not others (win) and it appears for both gtk and gtkagg.

JDH

http://old.nabble.com/gtkagg-pixel-buffer-bug-td18051692.html

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