Pose Library: refresh dopesheet & 3D view when changing asset library

The Create Pose Asset (`POSELIB_OT_create_pose_asset`) operator stores
the created asset in the current blend file. To avoid confusion, its
poll function refuses the use of the operator when the asset browser is
showing a different asset library. This means that the panels containing
a button for this operator need to be refreshed whenever another asset
library is selected.

2 files changed, 45 insertions, 1 deletions

diff --git a/pose_library/gui.py b/pose_library/gui.py
index da7b77c7..397f24bd 100644
--- a/pose_library/gui.py
+++ b/pose_library/gui.py
@@ -205,6 +205,42 @@ class DOPESHEET_PT_asset_panel(PoseLibraryPanel, Panel):
         layout.operator("poselib.convert_old_poselib")
 
 
+### Messagebus subscription to monitor asset library changes.
+_msgbus_owner = object()
+
+def _on_asset_library_changed() -> None:
+    """Update areas when a different asset library is selected."""
+    refresh_area_types = {'DOPESHEET_EDITOR', 'VIEW_3D'}
+    for win in bpy.context.window_manager.windows:
+        for area in win.screen.areas:
+            if area.type not in refresh_area_types:
+                continue
+
+            area.tag_redraw()
+
+def register_message_bus() -> None:
+    bpy.msgbus.subscribe_rna(
+        key=(bpy.types.FileAssetSelectParams, "asset_library_ref"),
+        owner=_msgbus_owner,
+        args=(),
+        notify=_on_asset_library_changed,
+        options={'PERSISTENT'},
+    )
+
+def unregister_message_bus() -> None:
+    bpy.msgbus.clear_by_owner(_msgbus_owner)
+
+@bpy.app.handlers.persistent
+def _on_blendfile_load_pre(none, other_none) -> None:
+    # The parameters are required, but both are None.
+    unregister_message_bus()
+
+@bpy.app.handlers.persistent
+def _on_blendfile_load_post(none, other_none) -> None:
+    # The parameters are required, but both are None.
+    register_message_bus()
+
+
 classes = (
     ASSETBROWSER_PT_pose_library_editing,
     ASSETBROWSER_PT_pose_library_usage,
@@ -230,12 +266,19 @@ def register() -> None:
     bpy.types.UI_MT_list_item_context_menu.prepend(pose_library_list_item_context_menu)
     bpy.types.ASSETBROWSER_MT_context_menu.prepend(pose_library_list_item_context_menu)
 
+    register_message_bus()
+    bpy.app.handlers.load_pre.append(_on_blendfile_load_pre)
+    bpy.app.handlers.load_post.append(_on_blendfile_load_post)
+
 
 def unregister() -> None:
     _unregister()
 
+    unregister_message_bus()
+
     del WorkSpace.active_pose_asset_index
     del WindowManager.pose_assets
 
     bpy.types.UI_MT_list_item_context_menu.remove(pose_library_list_item_context_menu)
     bpy.types.ASSETBROWSER_MT_context_menu.remove(pose_library_list_item_context_menu)
+
diff --git a/pose_library/operators.py b/pose_library/operators.py
index 9aa0333e..956a41a0 100644
--- a/pose_library/operators.py
+++ b/pose_library/operators.py
@@ -75,7 +75,8 @@ class POSELIB_OT_create_pose_asset(PoseAssetCreator, Operator):
     bl_idname = "poselib.create_pose_asset"
     bl_label = "Create Pose Asset"
     bl_description = (
-        "Create a new Action that contains the pose of the selected bones, and mark it as Asset"
+        "Create a new Action that contains the pose of the selected bones, and mark it as Asset. "
+        "The asset will be stored in the current blend file"
     )
     bl_options = {"REGISTER", "UNDO"}