I am looking at the documentation:
Let me copy paste here:
No influence is made on placement.
Windows should be placed in the center of the screen.
Windows should be placed at the current mouse position.
Keep window centered as it changes size, etc.
Center the window on its transient parent (see
Ok… I see 5 options… but where is POS_LEFT or POS_TOP? Are these not
available in Gtk? And, where could I find official documentation about
this, I mean, Gtk-documentation rather than ruby-gtk documentation?