Add wxRibbonControl::GetAncestorRibbonBar() helper.

New method allowing to find the ribbon bar containing the given window.

See #14283.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71641 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/ribbon/control.h

@@ -148,6 +148,15 @@ public:
     */
     bool Realise();
 
+    /**
+        Get the first ancestor which is a wxRibbonBar (or derived) or NULL
+        if not having such parent.
+
+        @since 2.9.4
+     */
+    virtual wxRibbonBar* GetAncestorRibbonBar()const;
+
+
     /**
         Finds the best width and height given the parent's width and height.
         Used to implement the wxRIBBON_PANEL_FLEXIBLE panel style.