id().print (buf, sizeof (buf));
node->add_property (X_("id"), buf);
node->add_property (X_("flags"), enum_2_string (_flags));
- snprintf (buf, sizeof (buf), "%2.12f", get_value());
+ snprintf (buf, sizeof (buf), "%2.12f", get_save_value());
node->add_property (X_("value"), buf);
if (_extra_xml) {
return *node;
}
-
int
Controllable::set_state (const XMLNode& node, int /*version*/)
{
virtual void set_value (double, GroupControlDisposition group_override) = 0;
virtual double get_value (void) const = 0;
+ /** This is used when saving state. By default it just calls
+ * get_value(), but a class with more complex semantics might override
+ * this to save some value that differs from what get_value() would
+ * return.
+ */
+ virtual double get_save_value () const { return get_value(); }
+
/** Conversions between `internal', 'interface', and 'user' values */
virtual double internal_to_interface (double i) const {return (i-lower())/(upper() - lower());} //by default, the interface range is just a linear interpolation between lower and upper values
virtual double interface_to_internal (double i) const {return lower() + i*(upper() - lower());}