Figured a new way to update viewport to preview changes in ifc text

src/blenderbim/blenderbim/bim/module/drawing/operator.py

@@ -1364,11 +1364,7 @@ class DisableEditingText(bpy.types.Operator, Operator):
 
         # force update this object's font size for viewport display
         DecoratorData.data.pop(context.object.name, None)
-
+        tool.Blender.update_viewport()
-        # TODO: just needed some way to trigger UI update
-        # probably there is more proper way to do it
-        props = context.object.BIMTextProperties
-        props.font_size = props.font_size
 
 
 class EditAssignedProduct(bpy.types.Operator, Operator):

src/blenderbim/blenderbim/core/tool.py

@@ -80,6 +80,7 @@ def set_active_object(cls, obj): pass
 def apply_bmesh(cls, mesh, bm): pass
 def get_bmesh_for_mesh(cls, mesh, clean=False): pass
 def get_viewport_context(cls): pass
+def update_viewport(cls): pass
 
 
 @interface

src/blenderbim/blenderbim/tool/blender.py

@@ -144,3 +144,11 @@ class Blender:
         area = next(area for area in bpy.context.screen.areas if area.type == "VIEW_3D")
         context_override = {"area": area}
         return context_override
+    
+    @classmethod
+    def update_viewport(cls):        
+        # if it stops working in future Blender versions
+        # there is an alternative:
+        # bpy.ops.wm.redraw_timer(type='DRAW_WIN_SWAP', iterations=1)
+
+        tool.Blender.get_viewport_context()['area'].tag_redraw()