Collection Manager: Fix selection issues. Task: T69577

Make treeview selection more stable and predictable.
Fix not being able to select the row from the left side with
a top level expander -- adjusts window sizing to account for this.

1 files changed, 5 insertions, 10 deletions

diff --git a/object_collection_manager/ui.py b/object_collection_manager/ui.py
index f4f0e73e..46d27e77 100644
--- a/object_collection_manager/ui.py
+++ b/object_collection_manager/ui.py
@@ -322,15 +322,6 @@ class CollectionManager(Operator):
 
         self.view_layer = view_layer.name
 
-        # sync selection in ui list with active layer collection
-        try:
-            active_laycol_name = view_layer.active_layer_collection.name
-            active_laycol_row_index = layer_collections[active_laycol_name]["row_index"]
-            cm.cm_list_index = active_laycol_row_index
-
-        except KeyError: # Master Collection is special and not part of regular collections
-            cm.cm_list_index = -1
-
         # check if expanded & history/buffer state still correct
         if collection_state:
             new_state = generate_state()
@@ -387,11 +378,12 @@ class CollectionManager(Operator):
         # handle window sizing
         max_width = 960
         min_width = 456
+        row_indent_width = 15
         width_step = 21
         scrollbar_width = 21
         lvl = get_max_lvl()
 
-        width = min_width + (width_step * lvl)
+        width = min_width + row_indent_width + (width_step * lvl)
 
         if len(layer_collections) > 14:
             width += scrollbar_width
@@ -440,6 +432,9 @@ class CM_UL_items(UIList):
         row = split.row(align=True)
         row.alignment = 'LEFT'
 
+        # allow room to select the row from the beginning
+        row.separator()
+
         # indent child items
         if laycol["lvl"] > 0:
             for _ in range(laycol["lvl"]):