Re: Treeview (liststore) CSS question

[Daniel Kasak <d j kasak dk gmail com>]

On Tue, Mar 19, 2019 at 3:01 AM Mike Martin via gtk-app-devel-list <
gtk-app-devel-list gnome org> wrote:

> Is it possible to set different background for a treestore, with a
> liststore, for populated rows v blank area.
>
> ie: If I have a dynamic treeview I would like to have one background colour
> for the rows and another for the treestore where there are no rows
>
> The particular example has the following tree
> Grid,Notebook,grid,scrolledwindow,treeview

Use set_cell_data_func:
https://developer.gnome.org/gtk3/stable/GtkTreeViewColumn.html#gtk-tree-view-column-set-cell-data-func

You'd have to do this for every GtkTreeViewColumn you wanted to colour.
Your callback would then fetch whatever value you want to use as a test (
ie to test whether the row is 'empty' or not ), and set the renderer's
"background' property to whatever colour you're after ( the callback get's
passed the renderer ).

Dan