Shell Experience Host: Brightness button is now a plain button, not a…

… toggle button. Re nvaccess#8845.

Brightness button is now a plain button, not a toggle button. Note that this control is now a slider in Windows 10 19H1 build 18277 and later.

source/appModules/shellexperiencehost.py

@@ -9,10 +9,20 @@
 
 import appModuleHandler
 from NVDAObjects.IAccessible import IAccessible, ContentGenericClient
+from NVDAObjects.UIA import UIA
+import controlTypes
 import ui
 
 class AppModule(appModuleHandler.AppModule):
 
+	def event_NVDAObject_init(self, obj):
+		if isinstance(obj, UIA):
+			# #8845: Brightness button in Action Center is a button, not a toggle button.
+			# Brightness control is now a slider in build 18277.
+			if obj.UIAElement.cachedAutomationID == "Microsoft.QuickAction.Brightness":
+				obj.role = controlTypes.ROLE_BUTTON
+				obj.states.discard(controlTypes.STATE_CHECKABLE)
+
 	def chooseNVDAObjectOverlayClasses(self,obj,clsList):
 		if isinstance(obj, IAccessible):
 			try: