added UnsetToolTip() which is also provided (as empty function) in wxUSE_TOOLTIPS==0 case unlike SetToolTip(NULL)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55268 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/window.h

@@ -1208,16 +1208,20 @@ public:
 #if wxUSE_TOOLTIPS
         // the easiest way to set a tooltip for a window is to use this method
     void SetToolTip( const wxString &tip );
-        // attach a tooltip to the window
+        // attach a tooltip to the window, pointer can be NULL to remove
+        // existing tooltip
     void SetToolTip( wxToolTip *tip ) { DoSetToolTip(tip); }
+        // more readable synonym for SetToolTip(NULL)
+    void UnsetToolTip() { SetToolTip(NULL); }
         // get the associated tooltip or NULL if none
     wxToolTip* GetToolTip() const { return m_tooltip; }
-    wxString GetToolTipText() const ;
-#else
+    wxString GetToolTipText() const;
+#else // !wxUSE_TOOLTIPS
         // make it much easier to compile apps in an environment
         // that doesn't support tooltips, such as PocketPC
-    inline void SetToolTip( const wxString & WXUNUSED(tip) ) {}
-#endif // wxUSE_TOOLTIPS
+    void SetToolTip(const wxString & WXUNUSED(tip)) { }
+    void UnsetToolTip() { }
+#endif // wxUSE_TOOLTIPS/!wxUSE_TOOLTIPS
 
     // drag and drop
     // -------------