Sets @markup as the contents of the tooltip, which is marked
up with Pango markup.
This function will take care of setting the
[property@Gtk.Widget:has-tooltip] as a side effect, and of the
default handler for the [signal@Gtk.Widget::query-tooltip] signal.
Sets @markup as the contents of the tooltip, which is marked up with Pango markup.
This function will take care of setting the [property@Gtk.Widget:has-tooltip] as a side effect, and of the default handler for the [signal@Gtk.Widget::query-tooltip] signal.
See also [method@Gtk.Tooltip.set_markup].