Re: [wxhaskell-users] Custom events

[Henning T. <le...@he...>]

On Sun, 30 Oct 2011, Henning Thielemann wrote:

> Recently on this list it was suggested to use
>
>   myEventId = wxID_HIGHEST+1
>
> for custom events and register them as menu events.
>
>   http://snipplr.com/view/17538/
>
>
> Now I added menus to my application and I got the strange behaviour that
> selecting a certain menu item (the second one of all items) let my
> application freeze. I found out that this could be solved by choosing a
> different EventId. So is the id wxID_HIGHEST+1 really free for use? How
> can I safely choose an id that is free for custom use? Is it sensible to
> consider custom events as menu events?

I found in Graphics.UI.WXCore.Types:

varTopId :: Var Id
varTopId
   = unsafePerformIO (varCreate (wxID_HIGHEST+1))

It looks like wxID_HIGHEST+1 is alreay used by wxhaskell. How can I make 
sure that I do not clash with id's used by wxhaskell in future?