gtk:stack-homogeneous (object)

object -- a gtk:stack widget
homogeneous -- true to make the stack homogeneous

The accessor for the homogeneous slot gets or sets whether the stack is homogeneous. If it is homogeneous, the stack will request the same size for all its children. If it is not, the stack may change size when a different child becomes visible.

Since 3.16, homogeneity can be controlled separately for horizontal and vertical size, with the hhomogeneous and vhomogeneous properties.