Collection Manager: Improve width calculation. Task: T69577

Improves the width calculation for the main window to better accommodate
sub-collections and take into account the width of the scroll bar when
it's present.

object_collection_manager/__init__.py

@@ -22,7 +22,7 @@ bl_info = {
     "name": "Collection Manager",
     "description": "Manage collections and their objects",
     "author": "Ryan Inch",
-    "version": (1,8,7),
+    "version": (1,8,8),
     "blender": (2, 80, 0),
     "location": "View3D - Object Mode (Shortcut - M)",
     "warning": '',  # used for warning icon and text in addons panel

object_collection_manager/ui.py

@@ -152,23 +152,8 @@ class CollectionManager(Operator):
 
     def execute(self, context):
         wm = context.window_manager
-        lvl = 0
-
-        #expanded.clear()
-
-        #excludeall_history.clear()
-        #restrictselectall_history.clear()
-        #hideall_history.clear()
-        #disableviewall_history.clear()
-        #disablerenderall_history.clear()
 
         update_property_group(context)
-
-        lvl = get_max_lvl()
-
-        if lvl > 25:
-            lvl = 25
-
         self.view_layer = context.view_layer.name
 
         # sync selection in ui list with active layer collection
@@ -179,6 +164,7 @@ class CollectionManager(Operator):
         except:
             context.scene.CMListIndex = -1
 
+        # check if in phantom mode and if it's still viable
         if context.scene.CM_Phantom_Mode:
             if set(layer_collections.keys()) != set(phantom_history["initial_state"].keys()):
                 context.scene.CM_Phantom_Mode = False
@@ -186,7 +172,22 @@ class CollectionManager(Operator):
             if context.view_layer.name != phantom_history["view_layer"]:
                 context.scene.CM_Phantom_Mode = False
 
-        return wm.invoke_popup(self, width=(400+(lvl*20)))
+        # handle window sizing
+        max_width = 960
+        min_width = 456
+        width_step = 21
+        scrollbar_width = 21
+        lvl = get_max_lvl()
+
+        width = min_width + (width_step * lvl)
+
+        if len(layer_collections) > 14:
+            width += scrollbar_width
+
+        if width > max_width:
+            width = max_width
+
+        return wm.invoke_popup(self, width=width)
 
 
 def update_selection(self, context):