/**
 * (c) 2008, Wacko-Wacko!
 * @author daclip
 */

function WSlideObject(objectPtr, defaultValue, speed) {
	var __classptr = this;
	var self = null;
	var prevPosition = null;
	
	/* slide timer vars */
	var timer = null;
	var currentShiftValue = 0;
	var _timerSpeed = 1;
	var scrollStep = speed;
	
	/* useful stuff */
	this.onComplete = function(position) { }
	this.onStart = function() { }
	
	this.getSelf = function() { return self; }
	
	/* public */
	this.slideRight = function(n) { this.processSlideRight(n);  }
	this.slideLeft = function(n) { this.processSlideLeft(n); }
	this.go = function(n) { processMovement(n); }
	
	
	/* slide effect processing */
	this.processSlideRight = function(n) {
		var __backref = this;

		if ((currentShiftValue+=scrollStep) >= n) {
			clearTimeout(timer);
			this.onComplete(currentShiftValue);
			return false;
		}
		set_position(currentShiftValue);
		timer = setTimeout(function() { __backref.processSlideRight(n); }, _timerSpeed);
	}
	
	this.processSlideLeft = function(n) {
		var __backref = this;
		if ((currentShiftValue-=scrollStep) <= n) {
			clearTimeout(timer);
			this.onComplete(currentShiftValue);
			return false;
		}
		set_position(currentShiftValue);
		timer = setTimeout(function() { __backref.processSlideLeft(n); }, _timerSpeed);
	}
	
	/* private */	
	var processMovement = function(position) {
		__classptr.onStart();
		if (position > prevPosition) {
			__classptr.slideRight(position);
			prevPosition = position;
		}
		if (position < prevPosition) {
			__classptr.slideLeft(position);
			prevPosition = position;
		}
	}
	
	var set_position = function(value) {
		self.style.marginLeft = value+"px";
	}
		
	var init = function() {
		self = objectPtr;
		if (defaultValue == null) defaultValue = 0;
		set_position(defaultValue);
		prevPosition = defaultValue;
		currentShiftValue = defaultValue;
	}
	init();

}