DD::Image::KnobChangeGroup Class Reference

Classes
class	Listener

Public Member Functions
void	flush ()

Static Public Member Functions
static bool	delaying ()
	whether a KnobChangeGroup exists at present

Friends
class	Knob

Detailed Description

a KnobChangeGroup will batch up all Knob::changed() calls made whilst it exists. The effects of the Knob::changed() calls will be executed when the KnobChangeGroup is destroyed. Note this does not batch the effects of subclasses' virtual changed() methods.

KnobChangeGroup is used, for example, when a large number of keyframes on a knob or group knobs are being set, which would otherwise cause the curve editor to update too often and be too slow.