How can I apply CSS to all children of an element, programmatically?

[Boxylmer]

I currently can style widgets through:

function default_button_style!(widget::Gtk.GtkWidget)
    sc = Gtk.GAccessor.style_context(widget)
    cssdata = "
    #btndefault {
            background-image:none;
            border-radius: 0px;
            border-width: 10px;
            border-style: solid;
            border-color: #000000;
            background-color: #FFFFFF;
            margin: 0.5em;

            font-family: Charcoal;
            font-size: 2em;
            font-weight: bold;
        }

        #btndefault:hover {
            border-radius: 0px;
            border-width: 10px;
            border-style: solid;
            border-color: #FFFFFF;
            background-color: #000000;
            color: #FFFFFF;
            margin: 0.5em;

            font-family: Charcoal;
            font-size: 2em;
            font-weight: bold;
        }
    "
    btndefault = Gtk.GtkCssProvider(data=cssdata)
    spb = GtkStyleProvider(btndefault)
    push!(sc, spb, 600)
    set_gtk_property!(widget, :name, "btndefault")
end

but this requires that I have set an ID and specifically reference that widget. If I have some default css data (font size, color, etc) that I want to set to a widget and all its children, what do I do?

Thanks!

[Boxylmer]

It's a bit hacky, but I found a way to do it in a pinch

function apply_style_recursively!(widget::Gtk.GtkWidget, style_function::Function)
    style_function(widget)
    for child in widget
        if length(methods(iterate, (typeof(child),))) > 0
            apply_style_recursively!(child, style_function)
        end
    end
end