matplotlib-users

[Matplotlib-users] Re: [pygtk] Gtk.Notebook problem in PyGTK 2.6

[John G. <jn...@eu...>]

I think this might be a matplotlib issue.

I've been having some refresh issues with matplotlib since switching to 
2.6.  In particular I've noticed that if I put my mouse over the toolbar 
and let a tooltip pop up the canvas does not get repainted.

Up to now I'd been assuming this problem was isolated to me (I use 
ratpoison as a window manager, which can confuse some apps).

I've cc'ed the matplotlib list in case anyone can throw some light on this.

John

dimitri pater wrote:

> Hello,
> I upgraded to PyGTK 2.6 from 2.4 . Now, when I switch from page 2 on a 
> Gtk.Notebook back to page 1, page 1 still shows some elements from 
> page 2 (it is not refreshed, just some parts). Both pages contain 
> graphs created with Matplotlib. I never had problems like this with 2.4...
> Any clues somebody? If necessary, I will attach the source files.
>
> Best regards,
> Dimitri
>
>------------------------------------------------------------------------
>
>_______________________________________________
>pygtk mailing list   py...@da...
>http://www.daa.com.au/mailman/listinfo/pygtk
>Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
>  
>

Re: [Matplotlib-users] Re: [pygtk] Gtk.Notebook problem in PyGTK 2.6

[N. V. <mit...@we...>]

dimitri pater schrieb:

> Yes, this could could very well be a matplotlib issue. I will try to 
> do some tests, thanks for cc'ing it to the matplotlib list.
>
> Dimitri
>
> On 5/31/05, *John Gill* <jn...@eu... 
> <mailto:jn...@eu...>> wrote:
>
>     I think this might be a matplotlib issue.
>
>     I've been having some refresh issues with matplotlib since
>     switching to 2.6.  In particular I've noticed that if I put my
>     mouse over the toolbar and let a tooltip pop up the canvas does
>     not get repainted.
>
>     Up to now I'd been assuming this problem was isolated to me (I use
>     ratpoison as a window manager, which can confuse some apps).
>
>     I've cc'ed the matplotlib list in case anyone can throw some light
>     on this.
>
>     John
>
>     dimitri pater wrote:
>
>>     Hello,
>>     I upgraded to PyGTK 2.6 from 2.4 . Now, when I switch from page 2
>>     on a Gtk.Notebook back to page 1, page 1 still shows some
>>     elements from page 2 (it is not refreshed, just some parts). Both
>>     pages contain graphs created with Matplotlib. I never had
>>     problems like this with 2.4...
>>     Any clues somebody? If necessary, I will attach the source files.
>>
>>     Best regards,
>>     Dimitri
>>
>>------------------------------------------------------------------------
>>
>>_______________________________________________
>>pygtk mailing list   
>>py...@da... <mailto:py...@da...>
>>http://www.daa.com.au/mailman/listinfo/pygtk
>>Read the PyGTK FAQ: 
>>http://www.async.com.br/faq/pygtk/
>>  
>>
>
>
>
> -- 
> Please visit dimitri's website: www.serpia.com <http://www.serpia.com> 

I can confirm this (mis)behaviour with matplotlib 0.80 and gtk+/pygtk 
2.6.  I had wanted to look into this matter, but didn't yet have time to 
do it.  A simple guess would be that the expose-event is not handled 
properly by the GTK backend.

I noticed the problem when I put a menu-bar over a matplotlib GTK 
Canvas.  When you leave an opened menu, the menu will not disappear.

Niklas.

[Matplotlib-users] Double Buffering (was: Gtk.Notebook problem in PyGTK 2.6)

[N. V. <mit...@we...>]

[...]

>> On 5/31/05, *John Gill* <jn...@eu... 
>> <mailto:jn...@eu...>> wrote:
>>
>>     I think this might be a matplotlib issue.
>>
>>     I've been having some refresh issues with matplotlib since
>>     switching to 2.6.  In particular I've noticed that if I put my
>>     mouse over the toolbar and let a tooltip pop up the canvas does
>>     not get repainted.
>>
>>     Up to now I'd been assuming this problem was isolated to me (I use
>>     ratpoison as a window manager, which can confuse some apps).
>>
>>     I've cc'ed the matplotlib list in case anyone can throw some light
>>     on this.
>>
>>     John
>>
[...]

> I can confirm this (mis)behaviour with matplotlib 0.80 and gtk+/pygtk 
> 2.6.  I had wanted to look into this matter, but didn't yet have time 
> to do it.  A simple guess would be that the expose-event is not 
> handled properly by the GTK backend.
>
> I noticed the problem when I put a menu-bar over a matplotlib GTK 
> Canvas.  When you leave an opened menu, the menu will not disappear.
>
> Niklas.
>

I have started looking at the code and did not quite understand what I 
found:

backends/backend_gtk.py has a class FigureCanvasGTK. Its method 
'expose_event' is responsible for redrawing.
In the situation I described, when I leave an opened menu that overlaps 
the graph, the expose_event is properly called, but the widget is not 
redrawn. If DBL_BUFFER is set (which it is), the widget is only redrawn, 
if self._draw_pixmap is set to True. Of course, this variable is not set 
to True when GTK closes a menu but only when matplotlib requests a 
redraw.  So, in conclusion, no redraw happens.

After consulting the PyGTK reference I tried to reactivate double 
buffering, which is turned of in the backend_gtk.py by the command

self.set_double_buffered(False)

I wonder why you set this? Do you want to provide your own double 
buffering? Why? If you set this value to True, everything will be fine.

Best regards,

Niklas Volbers.

[Matplotlib-users] Re: [pygtk] Gtk.Notebook problem in PyGTK 2.6

[dimitri p. <dim...@gm...>]

Yes, this could could very well be a matplotlib issue. I will try to do som=
e=20
tests, thanks for cc'ing it to the matplotlib list.

Dimitri

On 5/31/05, John Gill <jn...@eu...> wrote:
>=20
> I think this might be a matplotlib issue.
>=20
> I've been having some refresh issues with matplotlib since switching to=
=20
> 2.6. In particular I've noticed that if I put my mouse over the toolbar=
=20
> and let a tooltip pop up the canvas does not get repainted.
>=20
> Up to now I'd been assuming this problem was isolated to me (I use=20
> ratpoison as a window manager, which can confuse some apps).
>=20
> I've cc'ed the matplotlib list in case anyone can throw some light on=20
> this.
>=20
> John
>=20
> dimitri pater wrote:=20
>=20
> Hello,
> I upgraded to PyGTK 2.6 from 2.4 . Now, when I switch from page 2 on a=20
> Gtk.Notebook back to page 1, page 1 still shows some elements from page 2=
=20
> (it is not refreshed, just some parts). Both pages contain graphs created=
=20
> with Matplotlib. I never had problems like this with 2.4...
> Any clues somebody? If necessary, I will attach the source files.
>=20
> Best regards,
> Dimitri
>=20
> ------------------------------
>=20
> _______________________________________________
> pygtk mailing list   py...@da...
> http://www.daa.com.au/mailman/listinfo/pygtk
> Read the PyGTK FAQ: http://www.async.com.br/faq/pygtk/
>  =20
> =20


--=20
Please visit dimitri's website: www.serpia.com <http://www.serpia.com>