Re: [wxhaskell-users] Updating Choice controls with new content

[Daan L. <daa...@xs...>]

Hi Anders,

On Wed, 16 Jun 2004 15:06:21 +0200, Anders H=F6ckersten <ch...@dt...=
mers.se> wrote:

> Hi! I've been toying around a bit with wxHaskell lately and have run in=
to a problem. My application needs to be able to add elements to a Choice=
 control. The elements are read from a HaskellDB-based database as a list.
>
> My question is this: When clicking my "add" button, how do I tell the C=
hoice control to re-read
>  its list from source? I'm assuming I need to send it some event, but w=
hich one?

I think you can just use the "items" attribute to set the form of the cho=
ice
control. Something like:

    c <- choice ...
    ...
    set c [items :=3D ["hi", "there"]]


Furthermore, I think you need to use the "dynamic" attribute on the
layout of the choice control.

    set f [layout :=3D .... dynamic (widget c) ... ]


I hope this helps,
All the best,
  Daan.


>
> Anders
>
>
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