On Mon, Oct 6, 2014 at 7:11 PM, Paul Davis <paul linuxaudiosystems com> wrote
GtkLayout is NOT a canvas.
You need a canvas widget. Unfortunately, there is no blessed canvas widget.
GtkLayout is similar to GtkDrawingArea in that it’s a “blank slate” and doesn’t do anything but paint a blank background by default
GtkLayout: Infinite scrollable area containing child widgets and/or custom drawing