Re: Can a treeview do this?

[kadil <ksadil bigpond net au>]

On Mon, 2006-02-27 at 16:29 +0100, Gus Koppel wrote:
> kadil wrote:
>
> > I don't think a treeview can render this tree structured data that way I
> > wanted. The way I want it and the type of data is shown below:
> >
> >  ________________________________________________________
> > |  Function | Funct Failure    |  Failure Mode           |
> >  --------------------------------------------------------
> > |to be able |slow leak         | worn washer             |
> > |control the|                  |-------------------------|
> > |rate of fl-|                  | damaged seat            |
> > |uid passing|------------------|-------------------------|
> > |thru the   |unable to control | seized                  |
> > |device     |flow at all       |-------------------------|
> > |           |                  | frozen                  |
> > |--------------------------------------------------------|
> >
> > Any ideas, comments warmly received.
>
> No, I don't think a GtkTreeview can display this sort of structure.
>
> However, this sort of layout can perfectly be achieved by utilizing a
> GtkTable (instead of GtkTreeview). The "Row Span" property of cell
> widgets in a GtkTable is to be set here. It's the very same as in HTML 4
> tables, for instance. By doing this you're also not limited to simple
> drawn items like texts or bitmaps in the cells but can easily put any
> widget into them, i.e. buttons. To get closest to the appearance you
> sketched I suggest to use a GtkLabel in a GtkFrame for each cell.
>
> Main drawback is that if you're about to use more than 50 rows like this
> via a GtkTable, some performance degradation may start to take place.
> But for structures with limited numbers of cells this is negligible.
>
> Btw, GtkTable should be put into a GtkScrolledWindow, to handle the
> situation when there are more rows (or columns) to be displayed than the
> window dimensions allow - offer scrollbars in that case. It's the same
> way original GtkTreeViews work.
>
> I already created an example of your desired layout type but I'm afraid
> its Glade XML or .c code is a bit too long to include here (~10 KB).
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Thanks Gus. I am looking at thousands of rows, so I might have to do
something a bit more complicated. Maybe mapping this data to a gtktable
dynamically to reduce the overheads.

Kim