Add different menu label styles to wxFileHistory menus

These styles allow the program to choose to display file paths
in the menu or not

interface/wx/filehistory.h

@@ -5,6 +5,23 @@
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
+/**
+ Styles for the labels on menu items for wxFileHistory menus
+
+ @since 3.1.5
+*/
+enum wxFileHistoryMenuLabelStyle
+{
+    /** Hide the file path if it matches the path of the first item */
+    wxFH_HIDE_CURRENT_PATH,
+
+    /** Hide all paths and show only filenames */
+    wxFH_HIDE_ALL_PATHS,
+
+    /** Show the full path for all files */
+    wxFH_SHOW_FULL_PATH
+};
+
 /**
     @class wxFileHistory
 
@@ -15,6 +32,8 @@
     required in an MDI application, where the file history should appear on
     each MDI child menu as well as the MDI parent frame.
 
+    By default, the menu item label style will be @c wxFH_HIDE_CURRENT_PATH.
+
     @library{wxcore}
     @category{docview}
 
@@ -90,6 +109,14 @@ public:
     */
     virtual void Load(const wxConfigBase& config);
 
+    /**
+        Refresh the labels on all the menu items in the menus used by this
+        file history.
+
+        @since 3.1.5
+    */
+    void RefreshLabels();
+
     /**
         Removes the specified file from the history.
     */
@@ -120,4 +147,20 @@ public:
         called, as this is not done automatically.
     */
     virtual void UseMenu(wxMenu* menu);
+
+    /**
+        Set the style of the menu item labels.
+
+        @remarks Use RefreshLabels() to update any existing menu items to the new style.
+        @since 3.1.5
+    */
+    void SetMenuLabelStyle(wxFileHistoryMenuLabelStyle style);
+
+    /**
+        Get the current style of the menu item labels.
+        @since 3.1.5
+    */
+    wxFileHistoryMenuLabelStyle GetMenuLabelStyle() const;
+
+
 };