[Bug 961] New: - X11 Window parenting

[wine-bugs at winehq.com]

http://bugs.winehq.com/show_bug.cgi?id=961

           Summary: X11 Window parenting
           Product: Wine
           Version: CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-x11driver
        AssignedTo: wine-bugs at winehq.com
        ReportedBy: tkujala at lut.fi


DBMGUi.exe, which is a Visual Basic 6 application uses forms to present dialogs  
on screen. Under wine these dialogs do not receive any mouse input and only  
partial keyboard input. Also if a form activated with ShowModal fuction opens  
another dialog box, it will not even display.  
  
After debugging I found out that VB6 (or wine?) reparents (through 
X11DRV_SetParent) these dialogs to the  
main form. Under wine this means that these windows become subwindows of the  
main form which firstly means that these windows will never become managed if  
managed mode is set to "yes". Also this means that they will not get mouse  
input (because dbmgui (or vb6?)) disables the main window when form is 
displayed  
and therefore WindowFromPoint-function will never return anything. And finally  
this means that all these forms clip incorrectly to their parent window, and  
may then be completely invisible because they are created in desktop  
coordinates but are actually a child of a form whose coordinates are not  
desktop coordinates.  
  
These forms seemed to have only WS_CLIPCHILDREN+WS_MAXIMIZEBOX+0x80 as style  
and WS_EX_DLGMODALFRAME as ExStyle.  
  
I was able to continue my quest with dbmgui by forcing WS_EX_DLGMODALFRAME 
windows to be child of the root window and then prohibiting X11_SetParent to 
set new parent for windows that have WS_EX_DLGMODALFRAME set.

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