[Bug 1041] New: - Unable to select listview entries when LVS_OWNERDATA is used

wine-bugs at winehq.com wine-bugs at winehq.com
Thu Sep 26 14:36:41 CDT 2002


http://bugs.winehq.com/show_bug.cgi?id=1041

           Summary: Unable to select listview entries when LVS_OWNERDATA is
                    used
           Product: Wine
           Version: CVS
          Platform: PC
               URL: http://xnews.newsguy.com/
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: wine-gui
        AssignedTo: wine-bugs at winehq.com
        ReportedBy: prupe at myrealbox.com


When running Xnews 5.08.12, I am unable to select anything in any of the listview controls (such as the newsgroup list), either by mouse or keyboard.  Going back in CVS, it seems the problem first appeared in dlls/comctl32/listview.c 1.144.  I have compared log files with -debugmsg +listview between 1.143 and the latest (1.152):

egrep -i '(LButton|HitTest|Selection)' 1.152.log
  trace:listview:LISTVIEW_LButtonDown (key=1, X=544, Y=31)
  trace:listview:LISTVIEW_RemoveAllSelections ()
  trace:listview:LISTVIEW_HitTestItem (x=544, y=31)
  trace:listview:LISTVIEW_SuperHitTestItem (x=544, y=31)
  trace:listview:LISTVIEW_SuperHitTestItem no hit, closest item -1, distance 2147483647
  (many similar lines deleted)

In 1.152, the execution path is LISTVIEW_SuperHitTestItem -> LISTVIEW_GetItemRect -> LISTVIEW_GetAllMeasure.  The last one fails at
  if (!(hdpaSubItems = (HDPA)DPA_GetPtr(infoPtr->hdpaItems, nItem)))
      return FALSE;
The pointer was never set because the window style contains LVS_OWNERDATA, which causes set_main_item and set_sub_item to skip the calls to DPA_InsertPtr.

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