Add page highlighting to wxRibbonBar.

Allow visually highlighting a page to make it more noticeable to the user.

Closes #14527.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72347 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/ribbon/bar.h

@@ -284,6 +284,35 @@ public:
     */
     void HidePage(size_t page);
 
+    /**
+        Indicates whether a tab is currently highlighted.
+
+        @see AddPageHighlight()
+
+        @since 2.9.5
+    */
+    bool IsPageHighlighted(size_t page) const;
+
+    /**
+        Highlight the specified tab.
+
+        Highlighted tabs have a colour between that of the active tab
+        and a tab over which the mouse is hovering. This can be used
+        to make a tab (usually temporarily) more noticeable to the user.
+
+        @since 2.9.5
+    */
+    void AddPageHighlight(size_t page, bool highlight = true);
+
+    /**
+        Changes a tab to not be highlighted.
+
+        @see AddPageHighlight()
+
+        @since 2.9.5
+    */
+    void RemovePageHighlight(size_t page);
+
     /**
         Shows or hides the panel area of the ribbon bar.