Remove warnings related to events

[GenevieveBuckley]

Closes https://github.com/jni/zarpaint/issues/34

[GenevieveBuckley]

Note: There are several other locations where zarpaint uses the .value attribute (similar to this one). Perhaps they all need to be changed?

• _dims_chooser.py line 79 set_dims_order(dims, event.value)
• _dims_chooser.py line 83 move_indices(axes_list, event.value)
• _dims_chooser.py line 108 set_dims_order(dims, event.value)
• _dims_chooser.py line 112 move_indices(axes_list, event.value)
• _zarpaint.py line 27 widget.labels_file.value = labels_path

I can't find information about what I believe was a recent change in how PyQt handles events, that would help me better understand if I should do it for all of them. Unfortunately the warnings aren't obvious when you run the test suite, so the other alternative is to click through more workflows with zarpaint and see what pops up in the terminal.

[jni]

Hmm, looks like we need to change our test suite to use py3.8+.

Re events, no, I don't think those need to be changed yet. I think we want to eventually move to psygnal events, but in napari we are still using VisPy. The reason we were seeing the warning is that magicgui moved to the new system — it moves faster than napari itself.

Lemme make a PR with the test suite changes, then we can merge that in here.

Thanks @GenevieveBuckley!

[codecov-commenter]

Codecov Report

Merging #35 (2b5ec8b) into main (9514d25) will increase coverage by 0.13%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
+ Coverage   77.72%   77.85%   +0.13%     
==========================================
  Files          14       14              
  Lines         579      578       -1     
==========================================
  Hits          450      450              
+ Misses        129      128       -1     

Impacted Files	Coverage Δ
src/zarpaint/_zarpaint.py	42.20% <100.00%> (+0.27%)	:arrow_up:

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[GenevieveBuckley]

Ok cool.

One more thing to note: the directory widget button in zarpaint for the label filename isn't working for me anymore. It's flashing up with a GUI, then disappearing super quick. I can open the file widget GUI from the main napari image open file menu.

I see a lot of these messages in the terminal:

2022-07-15 15:59:08.694 python[75489:6782011] WARNING: <NSSavePanel: 0x16a114e00> -[NSSavePanel(exportedInterface) requestAppEnabledStateForItems:replyBlock:] no longer has a delegate to respond to shouldEnableURL

I haven't submitted an issue because:

• I'm not sure if this is a zarpaint thing or a magicgui thing.
• The situation is probably also complicated by the fact I'm using an M1 mac (which as far as I know, still needs you to conda install pyqt -c andfoy on python 3.9 and then fight furiously to avoid having that overwritten when you install napari/magicgui/etc.
• The magicgui hello world examples were displaying for me, and now they're not, so I can't debug properly now if things won't reproduce. It's late on Friday, so I'm going to stop here for now.

Just wanted to mention it, even if we're not taking any action now, just in case this or something similar pops up in future.