Re: [wxhaskell-users] how to make custom controls?

[Mads <mad...@ya...>]

Hi Conal

> Thanks much for the pointers, Mads.  I read the binview source code,
> which uses a global mutable table to store per-instance data.  I
> wonder if there's a nicer way.  did you ever find one?  - Conal

No. I did not even use the binview-way. I decided that I did not need it
enough to go with the binview-way :(

To be fair, I did not look very hard for a nicer solution.


Greetings,

Mads Lindstrøm


> 
> On Nov 28, 2007 9:47 AM, Mads Lindstrøm <mad...@ya...>
> wrote:
>         Hi
>         
>         
>         Conal Elliott wrote:
>         > I want to make (or find) a float-valued slider that displays
>         its
>         > current value and maybe its bounds.  Does anyone have advice
>         about
>         > doing that sort of thing.  I want the result to have have a 
>         > control-like interface, including a gettable attribute for
>         the current
>         > (float) value.  Thanks,  - Conal
>         
>         
>         To have a gettable attribute you need to make the type
>         containing the
>         slider an instance of Valued. See 
>         http://wxhaskell.sourceforge.net/doc/Graphics.UI.WX.Classes.html#t%
>         3AValued and:
>         
>         import qualified Graphics.UI.WX as Wx
>         
>         instance Wx.Valued YourTypeContainingTheSlider where
>            value = Wx.newAttr "Value" ioActionToGetValue
>         ioActionToSetValue
>         
>         there is also other classes you can make your type an instance
>         of. See 
>         the link above. You should properly make it an instance of
>         Widget as a
>         minimum.
>         
>         I also asked about something similar before. I got this reply
>         http://www.mail-archive.com/wxh...@li.../msg00260.html .
>         
>         
>         Greetings,
>         
>         Mads Lindstrøm
>         
>         
>