GtkAdjustment - A representation of an adjustable bounded value
GtkAdjustment - 調整可能な有限値の表現。
Description - 説明
The GtkAdjustment object represents a value which has an associated lower and upper bound, together with step and page increments, and a page size. It is used within several GTK+ widgets, including GtkSpinButton, GtkViewport, and GtkRange (which is a base class for GtkScrollbar and GtkScale).
The GtkAdjustment object does not update the value itself. Instead it is left up to the owner of the GtkAdjustment to control the value.
GtkAdjustment オブジェクトは自身の値を更新しません。値の操作は GtkAdjustment のオーナーに任されています。