added DrawComboBoxDropButton()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@31545 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/renderer.h

@@ -154,6 +154,14 @@ public:
                                   wxOrientation orient,
                                   int flags = 0) = 0;
 
+    // draw a combobox dropdown button
+    //
+    // flags may only use wxCONTROL_PRESSED
+    virtual void DrawComboBoxDropButton(wxWindow *win,
+                                        wxDC& dc,
+                                        const wxRect& rect,
+                                        int flags = 0) = 0;
+
 
     // geometry functions
     // ------------------
@@ -245,6 +253,12 @@ public:
         { m_rendererNative.DrawSplitterSash(win, dc, size,
                                             position, orient, flags); }
 
+    virtual void DrawComboBoxDropButton(wxWindow *win,
+                                        wxDC& dc,
+                                        const wxRect& rect,
+                                        int flags = 0)
+        { m_rendererNative.DrawComboBoxDropButton(win, dc, rect, flags); }
+
 
     virtual wxSplitterRenderParams GetSplitterParams(const wxWindow *win)
         { return m_rendererNative.GetSplitterParams(win); }