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>

2 files changed, 24 insertions, 0 deletions

diff --git a/src/platformsupport/windowsuiautomation/uiaserverinterfaces_p.h b/src/platformsupport/windowsuiautomation/uiaserverinterfaces_p.h
index fd39b6ee33..fde16206da 100644
--- a/src/platformsupport/windowsuiautomation/uiaserverinterfaces_p.h
+++ b/src/platformsupport/windowsuiautomation/uiaserverinterfaces_p.h
@@ -383,4 +383,21 @@ __CRT_UUID_DECL(IWindowProvider, 0x987df77b, 0xdb06, 0x4d77, 0x8f,0x8a, 0x86,0xa
 #endif
 #endif
 
+
+#ifndef __IExpandCollapseProvider_INTERFACE_DEFINED__
+#define __IExpandCollapseProvider_INTERFACE_DEFINED__
+DEFINE_GUID(IID_IExpandCollapseProvider, 0xd847d3a5, 0xcab0, 0x4a98, 0x8c,0x32, 0xec,0xb4,0x5c,0x59,0xad,0x24);
+MIDL_INTERFACE("d847d3a5-cab0-4a98-8c32-ecb45c59ad24")
+IExpandCollapseProvider : public IUnknown
+{
+public:
+    virtual HRESULT STDMETHODCALLTYPE Expand() = 0;
+    virtual HRESULT STDMETHODCALLTYPE Collapse() = 0;
+    virtual HRESULT STDMETHODCALLTYPE get_ExpandCollapseState(__RPC__out enum ExpandCollapseState *pRetVal) = 0;
+};
+#ifdef __CRT_UUID_DECL
+__CRT_UUID_DECL(IExpandCollapseProvider, 0xd847d3a5, 0xcab0, 0x4a98, 0x8c,0x32, 0xec,0xb4,0x5c,0x59,0xad,0x24)
+#endif
+#endif
+
 #endif
diff --git a/src/platformsupport/windowsuiautomation/uiatypes_p.h b/src/platformsupport/windowsuiautomation/uiatypes_p.h
index 8ef71843a3..afbc957094 100644
--- a/src/platformsupport/windowsuiautomation/uiatypes_p.h
+++ b/src/platformsupport/windowsuiautomation/uiatypes_p.h
@@ -155,6 +155,13 @@ enum WindowInteractionState {
     WindowInteractionState_NotResponding           = 4
 };
 
+enum ExpandCollapseState {
+    ExpandCollapseState_Collapsed         = 0,
+    ExpandCollapseState_Expanded          = 1,
+    ExpandCollapseState_PartiallyExpanded = 2,
+    ExpandCollapseState_LeafNode          = 3
+};
+
 struct UiaRect {
     double left;
     double top;