(gobject:define-genum "GtkConstraintAttribute" constraint-attribute
  (:export t
   :type-initializer "gtk_constraint_attribute_get_type")
  :none
  :left
  :right
  :top
  :bottom
  :start
  :end
  :width
  :height
  :center-x
  :center-y
  :baseline)  

:none

No attribute, used for constant relations.

:left

The left edge of a widget, regardless of text direction.

:right

The right edge of a widget, regardless of text direction.

:top

The top edge of a widget.

:bottom

The bottom edge of a widget.

:start

The leading edge of a widget, depending on text direction. Equivalent to the :left value for LTR languages, and the :right value for RTL ones.

:end

The trailing edge of a widget, depending on text direction. Equivalent to the :right value for LTR languages, and the :left value for RTL ones.

:width

The width of a widget.

:height

The height of a widget.

:center-x

The center of a widget, on the horizontal axis.

:center-y

The center of a widget, on the vertical axis.

:baseline

The baseline of a widget.