Re: GtkTreeView with huge amount of rows; dynamic data source?

["David Necas (Yeti)" <yeti physics muni cz>]

On Thu, Jan 13, 2005 at 02:05:38PM +0100, Gus Koppel wrote:
> I'd like to have a list- or treeview-like representation of the contents
> (rows) of a database. There can easily be tens of thousands of records
> to be browsable in a list. Not only filtered parts of the table should
> be listed, but also entire tables, unfiltered, should be browsable.
>
> Preparing a GtkListStore (or even GtkTreeStore) in memory and prefill it
> with, say, 100 000 entries doesn't seem to be the right way to me.
> Besides the unacceptable memory consumption it would take a significant
> amount of time to get the table entirely read in and the list prepared.
>
> So I'm looking for a more dynamic way. My data source (database) is
> capable of delivering arbitrary rows, in random access manner. My
> concept is to dynamically read and display only small parts of the
> database table, as the user scrolls to see them.

Plase see my post to gtk-list (for a database, one should do
some read-ahead instead of fetching rows one by one, but the
method is the same)

  http://mail.gnome.org/archives/gtk-list/2004-December/msg00217.html

It seems to work in practice, but no one answered my
question whether it's the Right Thing and whether it can be
expected to work in future Gtk+ versions. No one knows, or
no one cares...

However, 100k is still too much, so you probably need
a custom model (100k is also too much GUI-wise, I can't
imagine how can someone comfortably browse a list with 100k
items) that don't even need placeholder rows.

Yeti


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