gtk-window-set-geometry-hints (window widget geometry mask)

window -- a gtk-window widget
widget -- a gtk-widget object the geometry hints will be applied to or nil, since 3.20 this argument is ignored and GTK behaves as if nil was set
geometry -- a gdk-geometry instance containing geometry information
mask -- a gdk-window-hints mask indicating which structure fields should be paid attention to

This function sets up hints about how a window can be resized by the user. You can set a minimum and maximum size. Allowed resize increments, e.g. for xterm, you can only resize by the size of a character, aspect ratios, and more. See the gdk-geometry structure.