gboolean change_value ( GtkRange* self, GtkScrollType* scroll, gdouble value, gpointer user_data )
GtkRange::change-value signal is emitted when a scroll action is
performed on a range. It allows an application to determine the
type of scroll event that occurred and the resultant new value.
The application can handle the event itself and return
prevent further processing. Or, by returning
FALSE, it can pass
the event to other handlers until the default GTK+ handler is reached.
The value parameter is unrounded. An application that overrides
the GtkRange::change-value signal is responsible for clamping the
value to the desired number of decimal digits; the default GTK+
handler clamps the value based on
|Default handler: |
The default handler is called after the handlers added via
|Available since: 2.6|
The type of scroll action that was performed.
The data is owned by the caller of the function.
The new value resulting from the scroll action.