Patch from Tim Kosse to add supoprt for wxListCtrl::OnGetItemColumnImage

which enables images to be specified for columns other than zero in
virtual list controls.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37144 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/listctrl.cpp

@@ -2226,9 +2226,9 @@ void wxListMainWindow::CacheLineData(size_t line)
     for ( size_t col = 0; col < countCol; col++ )
     {
         ld->SetText(col, listctrl->OnGetItemText(line, col));
+        ld->SetImage(listctrl->OnGetItemColumnImage(line, col));
     }
 
-    ld->SetImage(listctrl->OnGetItemImage(line));
     ld->SetAttr(listctrl->OnGetItemAttr(line));
 }
 
@@ -5470,11 +5470,18 @@ int wxGenericListCtrl::OnGetItemImage(long WXUNUSED(item)) const
 {
     wxCHECK_MSG(!GetImageList(wxIMAGE_LIST_SMALL),
                 -1,
-                wxT("List control has an image list: OnGetItemImage should be overridden."));
-
+                wxT("List control has an image list, OnGetItemImage or OnGetItemColumnImage should be overridden."));
     return -1;
 }
 
+int wxGenericListCtrl::OnGetItemColumnImage(long item, long column) const
+{
+    if (!column)
+        return OnGetItemImage(item);
+
+   return -1;
+
+
 wxListItemAttr *
 wxGenericListCtrl::OnGetItemAttr(long WXUNUSED_UNLESS_DEBUG(item)) const
 {