OpenEuphoria

Re: Win32Lib please fix msg handler

• Posted by Derek Parnell <dparnell at BIGPOND.NET.AU> Sep 06, 2000
• 438 views

Ok, it'll go into the next bleeding edge build - I'll work on this today. If
anyone has a better idea to solve this let me know.

---
cheers,
Derek
----- Original Message -----
From: "Al Getz" <xaxo at AOL.COM>
To: <EUPHORIA at LISTSERV.MUOHIO.EDU>
Sent: Wednesday, September 06, 2000 6:01 AM
Subject: Win32Lib please fix msg handler


> in win32lib:
>
> START CODE QUOTE:
>   -- user can process events that Win32Lib doesn't have handlers for.
>   if onEvent[ id ] > 0 then
>     -- call routine
>     call_proc( onEvent[ id ], {iMsg, wParam, lParam} ) --why not a
function?
>
>   -- NEW! 0.41 allow user to override
>   if myReturn[length(myReturn)] != 0 then
>       return popSelf()
>   end if
> :END CODE QUOTE
>
> The problem is, an event handler often has to return a value of 0 to tell
>   Windows it is processing the event.  Since 'popSelf()' only happens
>   with non-zero values, its impossible to override without
>   modifying the win32lib file.
>
>   How about fixing that in your various versions?
>   The simplest is:
>
>   if onEvent[id]>0 then
>     retv={0,0}
>     retv=call_func(onEvent[id],{iMsg,wParam,lParam})
>     if retv[1]>0 then
>       return retv[2]
>     end if
>
>   If you want to stick with the current method, make each ret stack
>   member a two dimensional value:
>     {0,0}
>   the first value indicating whether or not to return the second value.
>
>   This is a fairly important functionality!
>
>   Thanks,
>     Al