change_value (
  GtkRange self,
  GtkScrollType* scroll,
  gdouble value,
  gpointer user_data

Description [src]

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 TRUE to 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 ::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 GtkRange:round-digits.

Default handler:

The default handler is called after the handlers added via g_signal_connect().


scroll GtkScrollType

The type of scroll action that was performed.

 The data is owned by the caller of the function.
value gdouble

The new value resulting from the scroll action.

Return value

Returns: gboolean

TRUE to prevent other handlers from being invoked for the signal, FALSE to propagate the signal further.