Re: treeview/treemodel with 100K's elements

["Jonathon Jongsma" <jonathon quotidian org>]

On Tue, May 13, 2008 at 9:01 AM, Ionutz Borcoman <iborco gmail com> wrote:
> Hi,
>
>  Playing around with the treemodel, I've discovered that adding a lot of items
>  to the model can become slow, if the number of added items is big enough
>  (>20K on my PC).
>
>  So, is there any way to implement a 'lazy' tree model? By lazy I mean:
>  1. load only the nodes for the items that are currently displayed, without
>  loading their children)
>  2. add an 'expander' image if the item has children
>  3. load the children when the node is expanded
>
>  An alternative to 2 and 3, if 2 is not possible would be to load only the
>  first children and delay the loading of the remaining children till the node
>  is expanded.
>
>  Any ideas or recommendations?
>
>  Thanx.
>
>  Johnny

you can certainly do this.  I know other people have implemented
things like this.  You'll probably need to implement a custom
treemodel.  For number 2, I think what most people do is add a 'dummy'
child and replace it with the actual children when the row is
expanded.

-- 
jonner