Re: [wxhaskell-users] TreeCtrl problem

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

On Sun, 16 May 2004 12:32:31 -0500, <wxh...@al...> wrote:

> Hello,
>
> I'm attempting to do a simple tree with 2 nodes.  However, the following
> is giving me a blank window with 2 tiny white tabs in the upper-left
> corner.  Anyone have an idea what I'm missing?

I haven't tried it myself, but maybe you need to expand the root node:

  treeCtrlExpand tree top


If that doesn't work, maybe you should download the sources of GeBoB (see
application screenshots for a link). He uses a tree control for the "brain"
component and maybe it gives some more info on using tree controls.

All the best,
  Daan.



>
> Thanks!
>
> module Main where
>
> import Graphics.UI.WX
> import Graphics.UI.WXCore
>
> imageNone :: Int
> imageNone = (-1)
>
> main :: IO()
> main = start test
>
> test :: IO()
> test = do f <- frame [text := "Hello!"]
>           tree <- treeCtrl f []
>           top <- treeCtrlAddRoot tree "Root" imageNone imageNone
>           objectNull
>           item <- treeCtrlAppendItem tree top "Child" imageNone imageNone
>           objectNull
>           set f [layout := widget tree, clientSize := sz 500 300]
>
>
>
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