Gtk.Widget.prototype.set_tooltip_markup

function set_tooltip_markup(markup:String):void {
    // Gjs wrapper for gtk_widget_set_tooltip_markup()
}

Sets markup as the contents of the tooltip, which is marked up with the <link linkend="PangoMarkupFormat">Pango text markup language</link>.

This function will take care of setting Gtk.has-tooltip to true and of the default handler for the Gtk.query-tooltip signal.

See also the Gtk.tooltip-markup property and Gtk.Tooltip.prototype.set_markup.

Since 2.12