[haiku-development] Re: ColumnListView.h
- From: Ralf Schülke <ralf.schuelke@xxxxxxxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Tue, 10 Jan 2012 21:27:12 +0100
OK, also i say go back to GridView and hello View !
What is the best todo for a new ColumnListView (TableView) ?
Sugestion are welcome ...
Ralf
2012/1/10 Ingo Weinhold <ingo_weinhold@xxxxxx>
> Ralf Schülke wrote:
> > So i go a head and draw the verry first prototype.
> >
> > I look into the QT World :-) and i litle understand this, but Haiku API
> is
> > litel bit other. We have no Signal and Slots we have BMessage /BLooper
> and
> > Hook functions ;-) .
> >
> > I Love the Idear to have a BTableView and add or remove Tabel Items.
>
> There's a MVC based table implementation I created for the table-heavy
> DebugAnalyzer [1]. It is not complete yet and currently uses ColumnListView
> as a back-end (which can (and was intended to) be replaced without changing
> the public interface). It is mostly inspired by Swing's JTree and JTable
> design, i.e. unlike Qt it uses different models for trees and flat lists.
> The unified model design has a few nice properties (most notably the
> flexibility in use -- e.g. also for combo boxen (where Qt unfortunately
> fails ATM) or common sort/filter proxy models), so it might be worthwhile
> considering migrating to such a design. Though I think it doesn't make much
> of a difference as long as it's only used for the table and tree classes,
> anyway.
>
> > The TableView are a Container View (BGridView) and all Items can add in
> the
> > Grid.
>
> BGridView is probably not the best choice. While the table items are
> indeed laid out in a grid, the main feature of BGridLayout -- laying out
> the items according to their minimum and maximum sizes -- is not really
> needed. Item heights are usually fixed and column width are set manually or
> algorithmically (with an explicit "resize to fit" option). Moreover
> BGridView was not designed with thousands of items in mind, so it might
> perform suboptimally.
>
> CU, Ingo
>
>
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