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. 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.
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. 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
polar_plot_zoomtest.py
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