Re: List view : no scroll bar and maximum length ?

Hi again,

Thanks a lot. This has perfectly worked and even with 100 000 entries,
gui is fast.
However the list view is too short and only displays 3 elements at
once but I guess this is because I haven't yet taken time to tweak
anything. So I'll see that more precisely during the week.
Thanks again.


 ---

Adrien Nader

2008/2/4, Julien Moutinho <[email protected]>:
> On Mon, Feb 04, 2008 at 10:01:48PM +0100, Adrien wrote:
> > Hi,
> Hi,
>
> > I've written a small mp3 player during the week-end, mainly in order
> > to check whether it was possible to write a light and fast one with
> > lablgtk (I miss foobar2000's interface under linux).
> >
> > I've encountered some problems, especially with list view (which the
> > biggest difference between a foobar ui and a winamp one :
> > http://foobar2000.org/screenshots/img/main-simple.png.html )
> >
> > My interface looks like : http://ocaml.yaxm.org/files/blatere/pr11n.png
> > (1000 times the same file in order to see how it scaled)
> >
> > First, I don't have any scroll bar though my playlist is 1000 elements
> > long. I know there is the GRange module but I can't believe these
> > scroll bars are not automatic.
>
> Use a GBin.scrolled_window.
>
> % diff -u second_try.ml.old second_try.ml
> --- second_try.ml.old   2008-02-04 22:47:05.000000000 +0100
> +++ second_try.ml       2008-02-04 22:55:02.000000000 +0100
> @@ -39,7 +39,9 @@
>  let rank_column=playlist#add Gobject.Data.string
>  let fileinfo_column=playlist#add Gobject.Data.string
>
> -let playlist_view=GTree.view ~packing:vbox#pack ()
> +let sw = GBin.scrolled_window () ~packing: vbox#add
> +  ~hpolicy: `AUTOMATIC ~vpolicy: `AUTOMATIC
> +let playlist_view=GTree.view () ~packing:sw#add
>  let _=playlist_view#append_column (GTree.view_column ~title:"Rank" ~renderer:(GTree.cell_renderer_text [], ["text", rank_column]) ())
>  let _=playlist_view#append_column (GTree.view_column ~title:"File Info" ~renderer:(GTree.cell_renderer_text [], ["text", fileinfo_column]) ())
>
> > Second, if I create a 2000 elements-long playlist, my program crashes
> > with the following message:
> >   The program 'blatère' received an X Window System error.
> >   This probably reflects a bug in the program.
> >   The error was 'BadAlloc (insufficient resources for operation)'.
> >     (Details: serial 462 error_code 11 request_code 53 minor_code 0)
> >     (Note to programmers: normally, X errors are reported asynchronously;
> >      that is, you will receive the error a while after causing it.
> >      To debug your program, run it with the --sync command line
> >      option to change this behavior. You can then get a meaningful
> >      backtrace from your debugger if you break on the gdk_x_error() function.)
>
> It should not crash any longer once the scroll bar has been added.
>
> HTH.
>
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