+        NULL,
+        button,
+        "button",
+        dc.LogicalToDeviceX(rect.x) - x_diff, rect.y, rect.width, rect.height
+    );
+
+    return DrawHeaderButtonContents(win, dc, rect, flags, sortArrow, params);
+}
+
+// draw a ">" or "v" button
+void
+wxRendererGTK::DrawTreeItemButton(wxWindow* win,
+                                  wxDC& dc, const wxRect& rect, int flags)
+{
+    GtkWidget *tree = GetTreeWidget();
+
+    GdkWindow* gdk_window = NULL;
+#if wxUSE_NEW_DC
+    wxDCImpl *impl = dc.GetImpl();
+    wxGTKDCImpl *gtk_impl = wxDynamicCast( impl, wxGTKDCImpl );
+    if (gtk_impl)
+        gdk_window = gtk_impl->GetGDKWindow();
+#else
+    gdk_window = dc.GetGDKWindow();
+#endif
+    wxASSERT_MSG( gdk_window,
+                  wxT("cannot use wxRendererNative on wxDC of this type") );
+
+    GtkStateType state;
+    if ( flags & wxCONTROL_CURRENT )
+        state = GTK_STATE_PRELIGHT;
+    else
+        state = GTK_STATE_NORMAL;
+
+    int x_diff = 0;
+    if (win->GetLayoutDirection() == wxLayout_RightToLeft)
+        x_diff = rect.width;
+
+    // VZ: I don't know how to get the size of the expander so as to centre it
+    //     in the given rectangle, +2/3 below is just what looks good here...
+    gtk_paint_expander
+    (
+        tree->style,
+        gdk_window,
+        state,
+        NULL,
+        tree,
+        "treeview",
+        dc.LogicalToDeviceX(rect.x) + 6 - x_diff,
+        dc.LogicalToDeviceY(rect.y) + 3,
+        flags & wxCONTROL_EXPANDED ? GTK_EXPANDER_EXPANDED
+                                   : GTK_EXPANDER_COLLAPSED
+    );
+}
+
+
+// ----------------------------------------------------------------------------
+// splitter sash drawing
+// ----------------------------------------------------------------------------
+
+static int GetGtkSplitterFullSize(GtkWidget* widget)
+{
+    gint handle_size;
+    gtk_widget_style_get(widget, "handle_size", &handle_size, NULL);
+
+    return handle_size;
+}
+
+wxSplitterRenderParams
+wxRendererGTK::GetSplitterParams(const wxWindow *WXUNUSED(win))
+{
+    // we don't draw any border, hence 0 for the second field
+    return wxSplitterRenderParams
+           (
+               GetGtkSplitterFullSize(GetSplitterWidget()),
+               0,
+               true     // hot sensitive
+           );
+}
+
+void
+wxRendererGTK::DrawSplitterBorder(wxWindow * WXUNUSED(win),
+                                  wxDC& WXUNUSED(dc),
+                                  const wxRect& WXUNUSED(rect),
+                                  int WXUNUSED(flags))
+{
+    // nothing to do
+}
+
+void
+wxRendererGTK::DrawSplitterSash(wxWindow *win,
+                                wxDC& dc,
+                                const wxSize& size,
+                                wxCoord position,
+                                wxOrientation orient,
+                                int flags)
+{
+    if ( !win->m_wxwindow->window )
+    {
+        // window not realized yet
+        return;
+    }
+
+    GdkWindow* gdk_window = NULL;
+#if wxUSE_NEW_DC
+    wxDCImpl *impl = dc.GetImpl();
+    wxGTKDCImpl *gtk_impl = wxDynamicCast( impl, wxGTKDCImpl );
+    if (gtk_impl)
+        gdk_window = gtk_impl->GetGDKWindow();
+#else
+    gdk_window = dc.GetGDKWindow();
+#endif
+    wxASSERT_MSG( gdk_window,
+                  wxT("cannot use wxRendererNative on wxDC of this type") );
+
+    wxCoord full_size = GetGtkSplitterFullSize(GetSplitterWidget());
+
+    // are we drawing vertical or horizontal splitter?
+    const bool isVert = orient == wxVERTICAL;
+
+    GdkRectangle rect;
+
+    if ( isVert )
+    {
+        rect.x = position;
+        rect.y = 0;
+        rect.width = full_size;
+        rect.height = size.y;
+    }
+    else // horz
+    {
+        rect.x = 0;
+        rect.y = position;
+        rect.height = full_size;
+        rect.width = size.x;
+    }
+
+    int x_diff = 0;
+    if (win->GetLayoutDirection() == wxLayout_RightToLeft)
+        x_diff = rect.width;
+
+    gtk_paint_handle
+    (
+        win->m_wxwindow->style,
+        gdk_window,
+        flags & wxCONTROL_CURRENT ? GTK_STATE_PRELIGHT : GTK_STATE_NORMAL,
+        GTK_SHADOW_NONE,
+        NULL /* no clipping */,