Re: [wxhaskell-users] newbie question, why clientSize doesn't affect textEntry?

[Jeremy O'D. <jer...@gm...>]

The full explanation is a bit tricky (tricky enough that I don't fully
understand or I would have fixed it!), but results from the way in which
Layout works. Layout is a neat idea, but has a number of quirks. The main
thing to realize is that Layout creates an hierarchy of Sizer instances
which contain your control instances. The interaction between the Sizers and
control size constraints can be tricky to fathom, but basically the Sizer
constraints seem to override clientsize directives.

My best advice would be to use either Layout and nothing else (as Carlos
suggests) or use Sizers manually and ignore Layout. I used this alternative
approach in m Custom Control tutorial - see
http://wewantarock.wordpress.com/2010/01/10/custom-controls-in-wxhaskell-part-2/

Regards
Jeremy

On 31 May 2011 23:05, carlos gomez <car...@gm...> wrote:

> I don't understand too. Looks like some misterious thing is happening.
> But you can use the 'mimsize' layout funcion from WXCore in order to get
> what you want.
>
> Here the code:
>
>
> module Main where
>
> import Graphics.UI.WX
>
> main::IO()
>
> main = start gui
>
> gui :: IO ()
>
> gui = do f <- frame [text := "timer"]
>          panel <- panel f [clientSize := sz 200 100]
>          hr  <- textEntry   panel
>                             [ text := "hour"
>                             , clientSize := sz 10 10
>                             ]
>          min <- button      panel
>                             [ text := "min"
>                             , clientSize := sz 10 10
>                             ]
>          sec <- textEntry   panel
>                             [ text := "sec"
>                             , clientSize := sz 10 10
>                             ]
>          -- layout
>          set panel [layout := margin 10 $  row 1 [ minsize (sz 10 10) $
> widget hr
>                                                  , widget min
>                                                  , minsize (sz 10 10) $
> widget sec
>                                                  ]
>                    ]
>          set f [layout := widget panel]
>
>
>
> On 30 May 2011 05:49, 诺铁 <no...@gm...> wrote:
>
>> Hi,
>>      I am learning wxHaskell,and trying to create a small timer app. I
>> don't understand why in following code ,clientSize only affect button
>> control
>>
>> module Main where
>>
>>
>> import Graphics.UI.WX
>>
>>
>> main::IO()
>>
>>
>> main = start gui
>>
>>
>> gui :: IO ()
>>
>>
>> gui =  do
>>
>>
>>         f <- frame [text := "timer"]
>>
>>
>>         panel <- panel f [clientSize := sz 200 100]
>>
>>
>>         hr  <- textEntry panel [text := "hour",clientSize := sz 10 10]
>>
>>
>>         min <- button panel [text := "min",clientSize := sz 10 10]
>>
>>
>>         sec <- textEntry panel [text := "sec",clientSize := sz 10 10]
>>
>>
>>         -- layout
>>
>>
>>         set panel [layout := margin 10 $  row 1 [widget hr,widget min,widget sec]]
>>
>>
>>         set f [layout := widget panel]
>>
>>
>>
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>>
>
>
> ------------------------------------------------------------------------------
> Simplify data backup and recovery for your virtual environment with
> vRanger.
> Installation's a snap, and flexible recovery options mean your data is
> safe,
> secure and there when you need it. Data protection magic?
> Nope - It's vRanger. Get your free trial download today.
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> wxh...@li...
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>
>