[Bug 10258] New: Missing region invalidation in listbox

http://bugs.winehq.org/show_bug.cgi?id=10258

Summary: Missing region invalidation in listbox
           Product: Wine
           Version: CVS/GIT
          Platform: PC
               URL: http://www.pulsen.se
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-user
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

This bug is similiar to bug 10240. The Magna Cura application uses the Ultimate
Grid Control (http://www.theultimatetoolbox.com/products/ultimategrid/) in it's
Calendar. A drop down listbox is opened when "down" buttons are pressed. This
listbox is not painted properly, see screenshot at
http://www.cendio.com/~astrand/wine/48-ultimate-grid/nopaint.png. Here, xclock
has been dragged over the listbox, which is then repainted correctly.

Magna Cura is not available for testing, as described in bug 10240. There's a
demo application of the Ultimate Grid available from
http://www.theultimatetoolbox.com/try/, but for some reason I cannot reproduce
the problem with this demo.

By executing Wine slowly, I've realized that the listbox is actually drawn
correctly at first, then incorrectly repainted blue.

I'm not 100% certain that the problem is with the listbox implementation, but
in any case, the problem goes away with this patch:

--- listbox.c   (revision 13259)
+++ listbox.c   (arbetskopia)
@@ -3064,6 +3064,7 @@
         if (descr->focus_item != -1)
             LISTBOX_RepaintItem( descr, descr->focus_item, ODA_FOCUS );
         SEND_NOTIFICATION( descr, LBN_SETFOCUS );
+        InvalidateRect(descr->self, NULL, TRUE);
         return 0;
     case WM_KILLFOCUS:
         descr->in_focus = FALSE;