1. Moved m_usePrimary to wxClipboardBase as it's now also used by wxMSW/wxMac

2. Added IsUsingPrimarySelection()
3. Fail all clipboard operations when IsUsingPrimarySelection() is true on
   non-X11 platforms


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45183 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/motif/clipbrd.h

@@ -67,13 +67,9 @@ public:
     // clears wxTheClipboard and the system's clipboard if possible
     virtual void Clear();
 
-    virtual void UsePrimarySelection(bool primary = true)
-    { m_usePrimary = primary; }
-
     // implementation from now on
     bool              m_open;
     wxDataObjectList  m_data;
-    bool              m_usePrimary;
     wxDataIdToDataObjectList m_idToObject;
 
 private:
@@ -82,5 +78,4 @@ private:
 
 #endif // wxUSE_CLIPBOARD
 
-#endif
-// _WX_CLIPBRD_H_
+#endif // _WX_CLIPBRD_H_