changed

The "changed" signal is emitted when any of the properties other than the value is altered in a GtkAdjustment. This happens when the adjustment object has its values initialised or unset, or when a widget-owned scrollable object is resized, or when the adjustable widget has a configure() method and calls it.

Note that a value-changed signal is also emitted under the same circumstances, regardless of whether the value itself has been changed.

Callback function

void callback(GtkAdjustment button);