Re: increase cell height in a GtkTreeView

[Nicolas SOUBEIRAN <nicolas soubeiran gmail com>]

Kristian Rietveld a écrit :
> (Apologies for such a late reply, I hope it is still of use).
>
> On Fri, Aug 1, 2008 at 11:37 AM, Nicolas Soubeiran
> <nicolas soubeiran gmail com> wrote:
>   
> > Hi all,
> > I need to create a treeview with a column which displays a pixbuf that
> > becomes bigger when the user hovers the row. So I create a cellrenderer
> > which display either the big pixbuf either the small pixbuf depending of the
> > value of the GtkCellRendererState flag (if PRELIT then display big pixbuf,
> > else small). It works except that the height of the cell is always the same
> > so when the big pixbuf should be displayed, it is troncated.
> >     
>
> Once a row got its size calculated and allocated, it will not change
> unless the data in the model changes (signaled via row-changed).  When
> GtkTreeView receives row-changed for a row, it will recalculate the
> requested height for that row by re-querying the cell renderers.
> Apart from this, cell renderers cannot influence the height of the
> row.
>
>   
> > I want to know how to ask the cell to request more space. Currently I've
> > copy/paste the render and get_size fonction of gtk_cell_renderer_pixbuf in
> > my component.
> >     
>
> The easiest solution is to emit the row-changed signal (using
> gtk_tree_model_row_changed()) once the row has to update its height.
>
>
> regards,
>
> -kris.
>
>   
OK, emitting the row-changed signal solves my problem.
Thanks
Nicolas