added GTK2 implementation of wxArtProvider

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28861 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/changes.txt

@@ -250,6 +250,7 @@ wxGTK:
   freedesktop.org's wm-spec (Mart Raudsepp)
 - wxEVT_CONTEXT_MENU is now generated for right mouse press, not release
 - implemented alpha channel support in wxBitmap
+- added native GTK+2  wxArtProvider implementation
 
 wxMotif:
 

docs/latex/wx/artprov.tex

@@ -75,6 +75,10 @@ constants in the \helpref{artprov}{sampleartprovider} sample):
 \item wxART\_MISSING\_IMAGE      
 \end{itemize}
 
+Additionally, any string recognized by custom art providers registered using
+\helpref{PushProvider}{wxartproviderpushprovider} may be used. When running
+under GTK+ 2, GTK+ stock item IDs (e.g. {\tt "gtk-cdrom"}) may be used as well.
+
 \membersection{Clients}
 
 Client is the entity that calls wxArtProvider's GetBitmap or GetIcon