I have created a few add-ons (e.g. https://github.com/Shriinivas/writinganimation) for Blender 2.8. For capturing the user input, I have been creating the UI Panels in ‘Active Tools & Workspace Settings’ tab using the following code:
bl_label = "Writing Animation"
bl_idname = "CURVE_PT_writinganim"
bl_space_type = 'PROPERTIES'
bl_region_type = 'WINDOW'
bl_context = '.objectmode'#Active only in object mode
I had successfully tested this upto the build dated May 4th. But since May 15th build the add-on panel is not seen on ‘Active Tools & Workspace Settings’ anymore. The add-on is installed correctly and is available from the F3 menu, but the UI panel is not accessible.
Has there been any change recently with respect to displaying of add-on UI?
I would appreciate any help.
Something similar happened to me the same day, I updated Blender and boom, the addon I was making looked awful due to some changes in the UI, and just today I readed that it was a bug and with the update version it is fixed, but not good for ui addons yeah, so in my case I had to add some thingsa I was playing with overwriting the original ui class or registering and unregistering it to fit it all in a good way.
I can give you a working code of a panel in my addon:
Yes, that’s right. The UI appears under render settings if bl_context is commented out. But it appears in all the tabs except Active Tools and Workspace settings :). The other setting suggested by you:
bl_space_type = "VIEW_3D"
bl_region_type = "UI
works. With this there is a new Misc tab on tools panel in 3d view, displaying the add-on UI. But again, I have published a video, which shows the panel under Active Tools and Workspace settings, so as far as possible, I would like to retain the panel position.
Secondly, with the latest build, there are now a few other errors related to scene.update and depsgraph. Looks like quite a bit of add-on API changes underway. So I guess, it’s better to wait for a few more days to let the things settle down.
I see… Well in that case I don’t know about how to retain the UI in that place…
I have found that they changed the default code but also they let commented the old one plus a note for the new settings
# bl_space_type = 'PROPERTIES'
# bl_region_type = 'WINDOW'
# bl_context = ".workspace"
# Developer note: this is displayed in tool settings as well as the 3D view.
bl_space_type = 'VIEW_3D'
bl_region_type = 'UI'
bl_category = "Tool"
There they use a parent class so the child ui class inherits from the parent class the space and region configuration…