the horizontal alignment of the child widget, from 0 (left) to 1 (right).
the vertical alignment of the child widget, from 0 (top) to 1 (bottom).
the amount that the child widget expands horizontally to fill up unused space, from 0 to 1. A value of 0 indicates that the child widget should never expand. A value of 1 indicates that the child widget will expand to fill all of the space allocated for the #GtkAlignment.
the amount that the child widget expands vertically to fill up unused space, from 0 to 1. The values are similar to @xscale.
Return: the new #GtkAlignment
Deprecated: Use #GtkWidget alignment and margin properties
ConstructionException GTK+ fails to create the object.
Creates a new #GtkAlignment.