On 11/08/2010 10:34 AM, Benjamin Root wrote:
I have come across an odd bug in PolarAxes event handling. If one
creates a polar axes, then attempts to do a zoom action (is this even
allowed?), and then attempts to do a pan (is this even allowed?),
errors get thrown.
Rubber-band zooming is not allowed, but panning is. Panning mode allows
for zooming (sounds counter-intuitive in English, but it makes more
sense in the interface that way). That mode also allows for dragging
the r-labels.
Digging deeper, I noticed that the error being thrown is from
"drag_zoom", which is odd because the current action should be
drag_pan. Note that this bug only occurs if a zoom was attempted
prior to a pan. Tracing the code execution, I can see that drag_pan
does get called before drag_zoom, which leads me to suspect that the
callbacks were never disconnected.
Quite possibly. I wrote the polar panning code -- but never tested this
interaction with rubber-band zooming, because the latter isn't supposed
to do anything anyway.
I don't have enough experience in this area to get much further. Can
anybody else figure out why the interactive panning and zooming are
not working for polar plots? There does appear to be code for that
purpose, but nothing happens for either. Maybe it is linked to this
bug? Maybe some code point is being skipped that would connect and
disconnect the proper callbacks? I am not sure what is going on
here. I have attached a really simple script to create a polar plot
for others to test this out.
I was able to confirm this and will look into it further.
Cheers,
Mike
Note: I am using GTKAgg backend.
Steps to reproduce:
1. Run script
2. Click on zoom button.
3. Click anywhere inside the polar plot (dragging is not needed).
4. Click on pan button
5. Click and drag inside the polar plot.
Ben Root
------------------------------------------------------------------------------
The Next 800 Companies to Lead America's Growth: New Video Whitepaper
David G. Thomson, author of the best-selling book "Blueprint to a
Billion" shares his insights and actions to help propel your
business during the next growth cycle. Listen Now!
http://p.sf.net/sfu/SAP-dev2dev
_______________________________________________
Matplotlib-devel mailing list
Matplotlib-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
------------------------------------------------------------------------------
The Next 800 Companies to Lead America's Growth: New Video Whitepaper
David G. Thomson, author of the best-selling book "Blueprint to a
Billion" shares his insights and actions to help propel your
business during the next growth cycle. Listen Now!
http://p.sf.net/sfu/SAP-dev2dev
_______________________________________________
Matplotlib-devel mailing list
Matplotlib-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
