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List:       gtkmm
Subject:    Re: treeview and scrolling
From:       danny van elsen <danny.van.elsen () skynet ! be>
Date:       2005-03-29 20:21:51
Message-ID: 4249B8DF.8000202 () skynet ! be
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hello Murray,

thanks for the answer!

I have had a look at the gtkmm example, but it seems to me that it will 
still call "get_data_row_iter_from_tree_row_iter" for every row in the 
data model, when initializing the model?

I put a "cout" statement in this method, and the more rows (rows_count) 
there are in the model, the more output there is...

Is there a way to avoid this?

greetings, Danny.

*********************************************************************

Murray Cumming wrote:

>On Fri, 2005-03-25 at 23:42 +0100, danny van elsen wrote:
>  
>
>>hello all,
>>
>>I would like to modify the scrolling behaviour of a treeview: I have 
>>hundreds of thousands of rows to show, and the treeview is taking far 
>>too long to fill up all of the data.
>>
>>So what I want to do is: instead of loading all data into the treeview, 
>>and then use the built in scrolling behavior, I would like to add my own 
>>scrolling, and to only add the data to the treeview that is currently 
>>visible.
>>    
>>
>
>I think that you need a derived treemodel that only gets the data when
>the data is really needed. There is a custom tree model example in the
>gtkmm tarball. It's not very easy.
>
>  
>
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