Re: problem with gtk_tree_view_set_fixed_height_mode()

["Brian J. Tarricone" <bjt23 cornell edu>]

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On 10/4/2005 5:07 AM, Stefan Kost wrote:
> Brian J. Tarricone schrieb:
>
> > Hi all,
> >
> > I'm trying to use GtkTreeView's fixed height mode for a playlist that
> > can hold thousands of items, but I'm having a bit of trouble.  All I
> > seem to get is:
> >
> > Gtk-CRITICAL **: gtk_tree_view_insert_column: assertion
> > `gtk_tree_view_column_get_sizing (column) == GTK_TREE_VIEW_COLUMN_FIXED'
> > failed
> >
> > I've tried gtk_cell_renderer_text_set_fixed_height_from_font() (I have
> > three columns, all text renderers), but no help there; I still get the
> > above critical message.
>
>
> This works for me:
>
> gtk_cell_renderer_text_set_fixed_height_from_font(GTK_CELL_RENDERER_TEXT(renderer),1);
>   if((tree_col=gtk_tree_view_column_new_with_attributes(_("Pos."),renderer,
>     "text",SEQUENCE_TABLE_POS,
>     "foreground-set",SEQUENCE_TABLE_TICK_FG_SET,
>     NULL))
> ) {
>   g_object_set(tree_col,
>     "sizing",GTK_TREE_VIEW_COLUMN_FIXED,
>     "fixed-width",40,
>     NULL);
>   col_index=
>     gtk_tree_view_append_column(self->priv->sequence_table,tree_col);
> }
> else GST_WARNING("can't create treeview column");
>
>
> I was initially using gtk_tree_view_insert_column_with_attributes() and
> got lots of assertions too. In this case it seems to be required to
> create the column, set the fixed-width and append (or insert) it.

That sounds kinda icky.  Where are you getting the value of '40' for the
 'fixed-width' parameter?  Just making it up?

Unfortunately, I *can't* use fixed-width columns, as the user needs to
be free to resize the containing window (and the treeview should resize
to match, with the middle column growing or shrinking as necessary).  I
still don't understand why GtkTreeView requires a fixed *width* column
in order to enable fixed *height* mode.

        -brian


> Stefan
>
>
> > If I set the sizing of each column to GTK_TREE_VIEW_COLUMN_FIXED, I get
> > 4500 blank rows, and only the middle column header is visible (probably
> > because I set its 'expand' property to TRUE).  Not too useful.
> >
> > I'm not understanding why fixed height mode has anything to do with the
> > sizing mode, since (according to the docs[1]), the sizing mode is only
> > used to determine the _width_ of the cell, not the height.
> >
> > Can someone enlighten me here?
> >
> > Thanks,
> > Brian
> >
> > [1] "The sizing method the column uses to determine its *width*. Please
> > note that GTK_TREE_VIEW_COLUMN_AUTOSIZE are inefficient for large views,
> > and can make columns appear choppy."  (emphasis mine)
>
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