// JavaScript Document

function GalleryControl (btPrev, btNext, total, index, callback, dispatchOutBounds)

{

	var _that = this;

	var _btPrev = btPrev;

	var _btNext = btNext;

	var _total = total;

	var _index = index;

	var _callback = callback;

	var _dispatchOutBounds = dispatchOutBounds == null ? false : dispatchOutBounds;

	

	var _disabledPrev = false;

	var _disabledNext = false;

	

	// Public Methods

	this.getIndex = function ()

	{

		return _index;

	}

	

	this.setIndex = function (value, callbackBool)

	{

		callbackBool = callbackBool == undefined ? true : callbackBool;

		_index = value;

		checkButtons ();

		if(callbackBool) _callback(value);

	}

	

	this.changeGallery = function (total, index)

	{

		_total = total;

		_index = index;

		checkButtons();

	}

	

	this.backImage = function ()

	{

		if(_disabledPrev) {

			_index = _total-1;

			_callback(_index);

			_disabledPrev = false;

			checkButtons ();

			if(_dispatchOutBounds) _callback("-");

			return false; 

		}

		_index--;

		checkButtons ();

		_callback(_index);

	}

	

	this.forwardImage = function()

	{

		if(_disabledNext) {

			_index = 0;

			_callback(_index);

			_disabledNext = false;

			checkButtons ();

			if(_dispatchOutBounds) _callback("+");

			return false; 

		}

		_index++;

		checkButtons ();

		_callback(_index);

	}

	

	function setupControls ()

	{

		_btPrev.unbind("click");

		_btPrev.click(function () {	_that.backImage() });	

		

		_btNext.unbind("click");

		_btNext.click(function () {	_that.forwardImage() });

	}

	

	function checkButtons ()

	{

		if(_index >= _total - 1) {

			//_btNext.addClass("disable");

			_disabledNext = true;

		} else {

			//_btNext.removeClass("disable");

			_disabledNext = false;

		}

		

		if(_index <= 0) {

			//_btPrev.addClass("disable");

			_disabledPrev = true;

		} else {

			//_btPrev.removeClass("disable");

			_disabledPrev = false;

		}

	}	

	

	// INIT

	setupControls ();

	checkButtons ();

}