addOverlay
open fun addOverlay(child: Widget, xpos: <Error class: unknown class>, ypos: <Error class: unknown class>)
Adds @child at a fixed coordinate in the GtkTextView's text window.
The @xpos and @ypos must be in buffer coordinates (see method@Gtk.TextView.get_iter_location to convert to buffer coordinates).
Parameters
child
a GtkWidget
xpos
X position of child in window coordinates
ypos
Y position of child in window coordinates