Merge pull request #4075 from Autodesk/bailp/EMSUSD-2012/theme-ui-scale

EMSUSD-2012 implement theme scale in Maya Host

Author: seando-adsk

lib/mayaUsd/resources/ae/usdschemabase/collectionMayaHost.py

@@ -7,6 +7,7 @@
 from maya.api.OpenMaya import MPxCommand, MFnPlugin, MGlobal, MSyntax, MArgDatabase
 import mayaUsd.lib
 import maya.mel as mel
+import maya.cmds as cmds
 
 from pxr import Usd
 from typing import AnyStr, Sequence, Tuple
@@ -313,6 +314,12 @@ def __init__(self):
         self._palette = None
         self._icons = {}
 
+    @property
+    def uiScaleFactor(self) -> float:
+        if not hasattr(cmds, 'mayaDpiSetting'):
+            return 1
+        return float(cmds.mayaDpiSetting(query=True, realScaleValue=True))
+
     def themeTab(self, tab):
         super().themeTab(tab)
         tab.setDocumentMode(False)