Re: How to customize GtkCellRendererCombo ?

[Miroslav Rajcic <support notecasepro com>]

Hi Stefan,

thank you for the nice idea.

I've tried the code, but it seems to produce two combo box columns 
instead of a single one, because renderer is pushed twice (original one 
is black, 2nd one is colored).

If I add this line before yours, that problem is fixed:
gtk_cell_layout_clear(GTK_CELL_LAYOUT(combo));

Unfortunately, this has other issue as well:
when you open combo box and select an item in it, selected item gets a 
handle to open its own sub-combo box.
This sub-combo can get opened and selected item in it gets sub-sub-combo 
box.
Basically this process goes recursively.

I've tried to ensure that the initialization within 
on_tree_cell_combo_editing_start is called only once, but this doesn't 
seem to help ... :(

Regards,
  Miroslav

On 6.12.2015. 1:12, Stefan Salewski wrote:
> On Sat, 2015-12-05 at 16:47 +0100, Miroslav Rajcic wrote:
> > I am trying to customize GtkCellRendererCombo so that the items in the
> > combo box have different colors.
> Yes, that is not really easy.
>
> Looking at
>
> https://developer.gnome.org/gtk3/stable/GtkCellLayout.html#gtk-cell-layo
> ut-set-cell-data-func
>
> I saw
>
> "This function is used instead of the standard attributes mapping for
> setting the column value, and should set the value of cell_layout ’s
> cell renderer(s) as appropriate."
>
> So my guess was to replace your
>
> //TOFIX
>
> comment with this call:
>                                 gtk_cell_layout_pack_start(GTK_CELL_LAYO
> UT(combo), renderer, TRUE);
>
> Seems to work.