Improve presentation of graphical view table in disk management

source/appModules/mmc.py

@@ -1,14 +1,14 @@
-#appModules/mmc.py
-#A part of NonVisual Desktop Access (NVDA)
-#Copyright (C) 2015-2019 NV Access Limited, David Parduhn, Bill Dengler, Leonard de Ruijter
-#This file is covered by the GNU General Public License.
-#See the file COPYING for more details.
+# A part of NonVisual Desktop Access (NVDA)
+# Copyright (C) 2015-2020 NV Access Limited, David Parduhn, Bill Dengler, Leonard de Ruijter, Łukasz Golonka
+# This file is covered by the GNU General Public License.
+# See the file COPYING for more details.
 
 import api
 import appModuleHandler
 import controlTypes
 import eventHandler
 from NVDAObjects.IAccessible import IAccessible
+from NVDAObjects.behaviors import ToolTip
 
 class MMCTable(IAccessible):
 	def _get_focusRedirect(self):
@@ -20,10 +20,36 @@ def _get_focusRedirect(self):
 
 
 class MMCTableCell(IAccessible):
+	""" Cell and rowheader makes no sense for these controls. Mapping them to list items has added benefit
+	of suppressing selected. """
+	role = controlTypes.ROLE_LISTITEM
+
 	def event_selection(self):
 		if self.parent.hasFocus and api.getFocusObject() != self:
 			eventHandler.executeEvent("gainFocus", self)
 
+	def _get_positionInfo(self):
+		""" When 'Guess object position info when unavailable' is enabled
+		these controls report very strange information such as 65537 of 12, especially in braille.
+		Disable reporting of position info all together. """
+		return None
+
+
+class toolTipWithEmptyName(ToolTip):
+	previousToolTipText = ''
+
+	def _get_name(self):
+		""" ToolTips appearing when hovering mouse over graphical view have empty name,
+		but it can be retrieved via display model. """
+		return self.displayText
+
+	def event_show(self):
+		# Stop repeating the same tooltip over and over again.
+		toolTipText = self.displayText
+		if toolTipText != toolTipWithEmptyName.previousToolTipText:
+			toolTipWithEmptyName.previousToolTipText = toolTipText
+			super().event_show()
+
 
 class AppModule(appModuleHandler.AppModule):
 	def chooseNVDAObjectOverlayClasses(self, obj, clsList):
@@ -33,3 +59,5 @@ def chooseNVDAObjectOverlayClasses(self, obj, clsList):
 			elif obj.role in (controlTypes.ROLE_TABLECELL,
 			controlTypes.ROLE_TABLEROWHEADER):
 				clsList.insert(0, MMCTableCell)
+		if obj.windowClassName == "tooltips_class32" and obj.name is None:
+			clsList.insert(0, toolTipWithEmptyName)

user_docs/en/changes.t2t

@@ -26,6 +26,7 @@ What's New in NVDA
 - In web browsers and other applications that support browse mode, the Elements List dialog (NVDA+F7) can now be invoked when in focus mode. (#10453)
 - Updates to ARIA live regions are now suppressed when reporting of dynamic content changes is disabled. (#9077)
 - NVDA will now report "Copied to clipboard" before the copied text. (#6757)
+- Presentation of graphical view table in disk management has been improved. (#10048)
 
 
 == Bug Fixes ==