Delayed update of outliner ui on change of active collection #109995

New Issue

Andrej · 2023-07-12T06:47:55+02:00

Andrej commented

2023-07-12 06:47:55 +02:00

Blender 3.6

When you change active collection outliner UI updates only after you leave the outliner.
Attached short demo gif.

Way to reproduce the issue:

Start default blender scene.
Add new collection "Example"
Run the script below in the text editor.
Note that above the outliner you can see currently active collection, by default it's "Collection"
Try to select "Example" instead of "Collection" - it won't update in the ui above.
If you leave the outliner it will update the active collection.
You can also try to choose some other collection and run operator to .tag_redraw() - F3 - Update Outliner. Note that info message that says that active collection didn't changed, it's just that outliner area wasn't updated.

What expected - outliner ui to update as you change active collection.

import bpy

def get_outliner_area(context):
    screen = context.screen
    for area in screen.areas:
        if area.type == "OUTLINER":
            return area

class EXAMPLE_OT_custom_collection_new(bpy.types.Operator):
    bl_idname = "example.redraw_outliner"
    bl_label = "Update outliner"
    def execute(self, context):
        before = context.collection.name
        area = get_outliner_area(context)
        area.tag_redraw()
        self.report({"INFO"}, f"{before} -> {context.collection.name}")

        return {'FINISHED'}

def context_draw_outliner_foobar_buttons(self, context):
    layout = self.layout
    layout.label(text=context.collection.name)
    layout.label(text=context.view_layer.active_layer_collection.name)
    layout.operator("example.redraw_outliner")

def register():
    bpy.utils.register_class(EXAMPLE_OT_custom_collection_new)
    bpy.types.OUTLINER_HT_header.append(context_draw_outliner_foobar_buttons)

def unregister():
    bpy.utils.unregister_class(EXAMPLE_OT_custom_collection_new)
    bpy.types.OUTLINER_HT_header.remove(context_draw_outliner_foobar_buttons)

if __name__ == "__main__":
    register()

Blender 3.6 When you change active collection outliner UI updates only after you leave the outliner. Attached short demo gif. Way to reproduce the issue: 1) Start default blender scene. 2) Add new collection "Example" 3) Run the script below in the text editor. 4) Note that above the outliner you can see currently active collection, by default it's "Collection" 5) Try to select "Example" instead of "Collection" - it won't update in the ui above. 6) If you leave the outliner it will update the active collection. 7) You can also try to choose some other collection and run operator to `.tag_redraw()` - F3 - Update Outliner. Note that info message that says that active collection didn't changed, it's just that outliner area wasn't updated. What expected - outliner ui to update as you change active collection. ```python import bpy def get_outliner_area(context): screen = context.screen for area in screen.areas: if area.type == "OUTLINER": return area class EXAMPLE_OT_custom_collection_new(bpy.types.Operator): bl_idname = "example.redraw_outliner" bl_label = "Update outliner" def execute(self, context): before = context.collection.name area = get_outliner_area(context) area.tag_redraw() self.report({"INFO"}, f"{before} -> {context.collection.name}") return {'FINISHED'} def context_draw_outliner_foobar_buttons(self, context): layout = self.layout layout.label(text=context.collection.name) layout.label(text=context.view_layer.active_layer_collection.name) layout.operator("example.redraw_outliner") def register(): bpy.utils.register_class(EXAMPLE_OT_custom_collection_new) bpy.types.OUTLINER_HT_header.append(context_draw_outliner_foobar_buttons) def unregister(): bpy.utils.unregister_class(EXAMPLE_OT_custom_collection_new) bpy.types.OUTLINER_HT_header.remove(context_draw_outliner_foobar_buttons) if __name__ == "__main__": register() ```

blender_MFERI9eqVv.mp4

635 KiB

Andrej added the

labels 2023-07-12 06:47:55 +02:00

YimingWu commented

2023-07-12 08:08:58 +02:00

Can replicate the behaviour, but I don't think this is a bug. Redraw tagging is done via notifier listeners internally, it's not "fully automatic" by nature.

Here in python you could refer to msgbus, and subscribe to current collection property, and update regions in the call back. Let us know if this worked for you. Thanks!

Can replicate the behaviour, but I don't think this is a bug. Redraw tagging is done via notifier listeners internally, it's not "fully automatic" by nature. Here in python you could refer to [msgbus](https://docs.blender.org/api/current/bpy.msgbus.html), and subscribe to current collection property, and update regions in the call back. Let us know if this worked for you. Thanks!

YimingWu added

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Delayed update of outliner ui on change of active collection #109995