bpy.types.Operator property "bl_property" does not work as expected #84563
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Reference: blender/blender#84563
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System Information
Operating system: Linux-5.8.0-36-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.102.04
Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2021-01-09 14:02, hash:
6154aa1529
Worked: not sure -- also broken in 2.91 and I believe earlier versions
Short description of error
setting bl_property on an Operator in a script does not seem to focus input field as expected
Exact steps for others to reproduce the error
This documentation for an Operator suggests that "bl_property" will be used to "select the default property when expanding an operator into a menu", which I believe to understand means that that property will be focused and ready for keyboard input.
• start blender with a fresh config directory
• enable Developer Extras in prefs->Interface
• open a text editor, paste in the script below
• run the script
• hit F3, enter "object.dialog_operator" and execute it
• observe that dialog appears, but float field is not focused, despite bl_property = "my_float"
If I have misunderstood something, my apologies; I have struggled to figure out how to make a property field focused and ready for input so that mousing to the field is not required, and this is the only thing I have found by internet searching. I have asked around and nobody seems to know how to do it, so I thought it was a bug.
Added subscriber: @clepsydrae
Added subscriber: @filedescriptor
Changed status from 'Needs Triage' to: 'Archived'
From what I understand in the documentation,
bl_property
is used bybpy.types.Menu
to select the property. I don't think this will work with dialogues the way you are trying to use it. Either way, this is not a bug.If you need help learning or using Blender, please post a question on one of our [community websites ]], for instance https:*blender.stackexchange.com/ , https:*blenderartists.org/ or the [ https:*blender.chat/channel/support | #support channel on Blender chat . The bug tracker is only for bug reports.
Closing.
Added subscriber: @brecht
Thanks -- I did ask on both belnderartists and stackexchange to no avail.
Here @brecht says that it is appropriate for use in an operator dialog: https://devtalk.blender.org/t/how-to-make-field-focused-in-props-dialog/2158/2
...hence I reported it as a bug. And it does in fact work for StringProperty, I have now learned, but not for FloatProperty. This feels like a bug to me, but I don't know enough to make that case.
This indeed only works for text fields. but I would not consider that a bug.
Ok, thanks for chiming in. I do wish that it would work on any property -- AFAIK this means it's impossible to make an operator that pops up a dialog from a keystroke that is ready for input without requiring moving the mouse to it and clicking?
It might be nice to update/clarify the documentation. I would submit new suggested text but I am underqualified. :-) E.g. I don't know how to interpret "Currently this is only used to select the default property when expanding an operator into a menu", or whether StringProperty is the only kind of property bl_property applies to.
Anyway, thanks for looking at this.
Added subscriber: @antoine.grasset
+1 this is confusing : I just struggled an hour not understanding with I couldn't focus a float field !
This could be a little patch to make the behaviour coherent and bring some productivity improvement.
@brecht I cannot seem to find in the code source how "bl_property" will bring a string field to focus... could you point me in the general direction ?
In
interface_templates.c
:In case anyone is as foolish as I am, I tried removing "&& (but->type == UI_BTYPE_TEXT)" just to see if it would work for float properties, and it did not. :-)
Added subscriber: @TinyNick
I have also encountered this as an unexpected result, but I was able to find a work around converting the string to a float. I conquer that it is not a bug but maybe this would be appropriate as a feature request instead? @brecht I made a post about my findings and work around here https://blenderartists.org/t/how-to-focus-on-an-integer-in-an-operator-in-an-addon/1287896/2 but this really only seems to be an issue for beginner programmers, because it seems that if you have a robust understanding of python its a pretty simple solution.