gdk:window-set-geometry-hints (window geometry mask)

window -- a toplevel gdk:window object
geometry -- a gdk:geometry instance with the geometry hints
mask -- a gdk:window-hints bitmask indicating fields of geometry to pay attention to

Sets the geometry hints for the window. Hints flagged in mask are set, hints not flagged are unset.

This function provides hints to the windowing system about acceptable sizes for a toplevel window. The purpose of this is to constrain user resizing, but the windowing system will typically, but is not required to, also constrain the current size of the window to the provided values and constrain programatic resizing via the gdk:window-resize or gdk:window-move-resize functions.

Note that on X11, this effect has no effect on windows of type :temp or windows where override redirect has been turned on via the gdk:window-set-override-redirect function since these windows are not resizable by the user.

Since you cannot count on the windowing system doing the constraints for programmatic resizes, you should generally call the gdk:window-constrain-size function yourself to determine appropriate sizes.