Windows QPA: Implement IExpandCollapseProvider for submenus

Menu items with submenus should implement the Expand/Collapse UI Automation
pattern in order to allow screen readers to say whether they are expandable
items.

Fixes: QTBUG-80550
Change-Id: I4f72d30172f76f028be5cbdeb1fd85fca6b07acf
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/uiautomation/qwindowsuiamainprovider.cpp b/src/plugins/platforms/windows/uiautomation/qwindowsuiamainprovider.cpp
index cc293b777c..c89dea3dfb 100644
--- a/src/plugins/platforms/windows/uiautomation/qwindowsuiamainprovider.cpp
+++ b/src/plugins/platforms/windows/uiautomation/qwindowsuiamainprovider.cpp
@@ -53,6 +53,7 @@
 #include "qwindowsuiagridprovider.h"
 #include "qwindowsuiagriditemprovider.h"
 #include "qwindowsuiawindowprovider.h"
+#include "qwindowsuiaexpandcollapseprovider.h"
 #include "qwindowscombase.h"
 #include "qwindowscontext.h"
 #include "qwindowsuiautils.h"
@@ -341,6 +342,14 @@ HRESULT QWindowsUiaMainProvider::GetPatternProvider(PATTERNID idPattern, IUnknow
             *pRetVal = new QWindowsUiaInvokeProvider(id());
         }
         break;
+    case UIA_ExpandCollapsePatternId:
+        // Menu items with submenus.
+        if (accessible->role() == QAccessible::MenuItem
+                && accessible->childCount() > 0
+                && accessible->child(0)->role() == QAccessible::PopupMenu) {
+            *pRetVal = new QWindowsUiaExpandCollapseProvider(id());
+        }
+        break;
     default:
         break;
     }