IlvBlinkAccessor Class Reference

Makes objects blink by switching their visible value back and forth. More...

#include <ilviews/protos/animacc.h>

Inheritance diagram for IlvBlinkAccessor:

List of all members.

Public Member Functions
	IlvBlinkAccessor (const char *name, const IlvValueTypeClass *type, IlvDisplay *display, const char *periodVal, const char *booleanValue)
	Creates a new animation accessor that makes the object blink.
Protected Member Functions
virtual void	doit ()
	Performs periodic updates of the accessor.

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Detailed Description

Makes objects blink by switching their visible value back and forth.

Library: ilvproto

This accessor works by switching a Boolean attribute back and forth between IlTrue and IlFalse. This attribute is often the "visible" attribute of a graphic node, which has the effect of making the object blink. If the application uses shared timers (see IlvAnimationAccessor), all the blink accessors are synchronized. This means that all the blinking objects become visible at the same time, and are hidden at the same time. When a blink accessor is stopped, the blinking object is always left in its initial state.

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Constructor & Destructor Documentation

IlvBlinkAccessor::IlvBlinkAccessor	(	const char *	name,
		const IlvValueTypeClass *	type,
		IlvDisplay *	display,
		const char *	periodVal,
		const char *	booleanValue
	)

Creates a new animation accessor that makes the object blink.

Parameters:

	name	Name of the accessor.
	type	Type of the value.
	display	Needed to initialize the timers.
	booleanValue	Attribute that is alternatively set and unset.
	periodVal	Specifies the interval (in milliseconds) at which booleanValue will be changed (see IlvAnimationAccessor). periodVal can contain a constant value, the name of another accessor, or an arithmetic expression that can contain accessor names and/or constants (see IlvUserAccessor::getValue).

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Member Function Documentation

virtual void IlvBlinkAccessor::doit

(

)

[protected, virtual]

Performs periodic updates of the accessor.

This method is called repeatedly by the IlvAnimationAccessor object at the time interval specified by the periodVal argument of the constructor. It must be redefined by subclasses to perform a visual or audio animation effect. Its default behavior implements the clock behavior: it triggers regularly the attribute it is attached to.

Reimplemented from IlvAnimationAccessor.