Re: TreeModel and TreeView

["Paul Davis" <pjdavis engineering uiowa edu>]

Trigve,

Using custom tree models for this sounds like an overcomplication. I'd
recommend trying a normal tree model and loading data into it instead
of trying to subclass it.

Custom tree models are fairly complicated. I'd avoid using them if possible.

Paul

On 1/28/07, Trigve Siver <trigves yahoo com> wrote:
> Hi,
>
>
>
>
>
>
> I'm examining the exmaple code from gtkmm sources
> (examples/treemodelcustom). I have compiled and run it and have some
> question. The first operation that is called is
> ExampleTreeModel::get_iter_vfunc(const Path& path,
> iterator& iter) and then "_number_of_rows_" times iter_has_child_vfunc +
> iter_next_vfunc. Then get_value_vfunc is called... so I was thinking that
> get_value_vfunc is called only when TreeView need information for rendering
> the cell...but it looks like that it is called even when only one row is
> visible... So my question is if it is possible somehow to achieve that
> get_value_vfunc is called only when row is to be rendered... I want to
> display some data from DB where is about 10.000+ records...so want to fetch
> row on demand...not all rows at begining
>
> thanks
>
> Trigve
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