/***************************************************************
 *  FC-TrackBar
 *
 *   Copyright (C) 2008 by Alexander Burtsev - fastcoder.org
 *   and abarmot - http://abarmot.habrahabr.ru/
 *   designed by Svetlana Solov'eva - http://avis-solo.blogspot.com/
 *
 *  This code is a public domain.
 ***************************************************************/

var trackbar = { // NAMESPACE
	archive : {},
	getObject : function(id) {
		if (typeof this.archive[id] == "undefined") {
			this.archive[id] = new this.hotSearch(id);
		}
		return this.archive[id];
	}
};

trackbar.hotSearch = function(id) { // Constructor
	// Vars
	this.id = id;
	
	this.leftWidth = 0; // px
	this.rightWidth = 0; // px
	this.width = 100; // px
	this.intervalWidth = 0; // px
	
	this.leftLimit = 0;
	this.leftValue = 0;
	this.rightLimit = 100;
	this.rightValue = 0;
	this.valueInterval = 0;
	this.widthRem = 6;
	this.valueWidth = 0;
	this.roundUp = 0;
	
	this.x0 = 0; this.y0 = 0;
	this.blockX0 = 0; 
	this.rightX0 = 0; 
	this.leftX0 = 0;
	// Flags
	this.dual = true;
	this.moveState = false;
	this.moveIntervalState = false;
	this.debugMode = true;
	this.clearLimits = false;
	this.clearValues = false;
	this.nodeInit = false;
	this.itWasMove = false;
	
	this.showSmallTicks = false;
	this.showBigTicks = false;
	this.smallTicks = 1;
	this.bigTicks = 1;
	// Handlers
	this.onMove = function() {};
	// Nodes
	this.leftBlock = null;
	this.rightBlock = null;
	this.leftBegun = null;
	this.rightBegun = null;
	this.centerBlock = null;
	this.tickDiv = null;
	this.table = null;
}

trackbar.hotSearch.prototype = {
// Const
	ERRORS : {
		1 : "Object initialization error",
		2 : "Left slider was not found",
		3 : "Right slider was not found",
		4 : "Left resize area was not found",
		5 : "Right resize area was not found",
		9 : "Center click area was not found"
	},
	LEFT_BLOCK_PREFIX : "leftBlock_",
	RIGHT_BLOCK_PREFIX : "rightBlock_",
	LEFT_BEGUN_PREFIX : "leftBegun_",
	RIGHT_BEGUN_PREFIX : "rightBegun_",
	CENTER_BLOCK_PREFIX : "centerBlock_",
	TABLE_PREFIX : "fctable_",
	TICKDIV_PREFIX : "tickdiv_",
// Methods
	// Default
	gebi : function(id) {
		return document.getElementById(id);
	},
	addHandler : function(object, event, handler, useCapture) {
		if (object.addEventListener) {
			object.addEventListener(event, handler, useCapture ? useCapture : false);
		} else if (object.attachEvent) {
			object.attachEvent('on' + event, handler);
		} else alert(this.errorArray[9]);
	},
	defPosition : function(event) { 
		var x = y = 0; 
		if (document.attachEvent != null) {
			x = window.event.clientX + document.documentElement.scrollLeft + document.body.scrollLeft; 
			y = window.event.clientY + document.documentElement.scrollTop + document.body.scrollTop; 
		} 
		if (!document.attachEvent && document.addEventListener) { // Gecko 
			x = event.clientX + window.scrollX; 
			y = event.clientY + window.scrollY; 
		} 
		return {x:x, y:y}; 
	},
	absPosition : function(obj) { 
		var x = y = 0; 
		while(obj) { 
			x += obj.offsetLeft; 
			y += obj.offsetTop; 
			obj = obj.offsetParent; 
		} 
		return {x:x, y:y}; 
	},
	/* 
		Method domReady - Copyright http://ajaxian.com/
		More fun with DOMContentLoaded
		http://ajaxian.com/archives/more-fun-with-domcontentloaded
	*/
	domReady : function(i) {
		var u =navigator.userAgent;
		var e=/*@cc_on!@*/false;
		var st = setTimeout;
		if (/webkit/i.test(u)) {
			st(
				function() {
					var dr=document.readyState;
					if(dr=="loaded"||dr=="complete"){
						i()
					} else {
						st(arguments.callee,10);
					}
				},
				10
			);
		} else if ((/mozilla/i.test(u)&&!/(compati)/.test(u)) || (/opera/i.test(u))) {
			document.addEventListener("DOMContentLoaded", i, false);
		} else if (e) {(
			function(){
				var t=document.createElement('doc:rdy');
				try {
					t.doScroll('left');
					i();
					t=null;
				} catch(e) {
					st(arguments.callee,0);
				}
			})();
		} else {
			window.onload=i;
		}
	},
	// Common
	debug : function(keys) {
		if (!this.debugMode) return;
		var mes = "";
		for (var i = 0; i < keys.length; i++) mes += this.ERRORS[keys[i]] + " : ";
		mes = mes.substring(0, mes.length - 3);
		alert(mes);
		this.table.style.display = "none";
	},
	init : function(hash, node) {
		if (typeof node != "undefined" && !this.nodeInit) {
			this.nodeInit = true;
			var _this = this;
			this.domReady(
				function() {_this.init(hash, node)}
			);
			return;
		}
		if (typeof node == "string") node = this.gebi(node);
		else node = false;
		try {
			for (var i in hash) this[i] = hash[i];
			// 
			if (this.leftValue < this.leftLimit) this.leftValue = this.leftLimit;
			if (this.rightValue > this.rightLimit) this.rightValue = this.rightLimit;
			// HTML Write
			var code = '<div class="tickdiv" id="'+this.TICKDIV_PREFIX+this.id+'"></div><table id="'+this.TABLE_PREFIX+this.id+'" ' + (this.width ? ' style="width:'+this.width+'px;"' : '') + 'class="trackbar" onSelectStart="return false;">\
				<tr>\
					<td class="l"><div id="leftBlock_' + this.id + '"><span></span><span class="limit"></span><img id="leftBegun_' + this.id + '" ondragstart="return false;" src="imgtrackbar/b_l.gif" width="5" height="17" alt="" /></div></td>\
					<td class="c" id="centerBlock_' + this.id + '"></td>\
					<td class="r"><div id="rightBlock_' + this.id + '"><span></span><span class="limit"></span><img id="rightBegun_' + this.id + '" ondragstart="return false;" src="imgtrackbar/b_r.gif" width="5" height="17" alt="" /></div></td>\
				</tr>\
			</table>';
			if (node) node.innerHTML = code;
			else document.write(code)
			// Is all right?
			this.leftBegun = this.gebi(this.LEFT_BEGUN_PREFIX + this.id);
			if (this.leftBegun == null) {this.debug([1,2]);	return;}

			this.rightBegun = this.gebi(this.RIGHT_BEGUN_PREFIX + this.id);
			if (this.rightBegun == null) {this.debug([1,3]); return;}

			this.leftBlock = this.gebi(this.LEFT_BLOCK_PREFIX + this.id);
			if (this.leftBlock == null) {this.debug([1,4]); return;}

			this.rightBlock = this.gebi(this.RIGHT_BLOCK_PREFIX + this.id);
			if (this.rightBlock == null) {this.debug([1,5]); return;}

			this.centerBlock = this.gebi(this.CENTER_BLOCK_PREFIX + this.id);
			if (this.centerBlock == null) {this.debug([1,9]); return;}
			
			this.table = this.gebi(this.TABLE_PREFIX + this.id);
			this.tickDiv = this.gebi(this.TICKDIV_PREFIX + this.id);
			// Set default
			this.valueWidth = this.width - 2 * this.widthRem;
			this.rightValue = this.rightValue || this.rightLimit;
			this.leftValue = this.leftValue || this.leftLimit;
			if (!this.dual) this.rightValue = this.leftValue;
			this.valueInterval = this.rightLimit - this.leftLimit;
			this.leftWidth = Math.abs(parseInt((this.leftValue - this.leftLimit) / this.valueInterval * this.valueWidth) + this.widthRem);
			this.rightWidth = Math.abs(this.valueWidth - parseInt((this.rightValue - this.leftLimit) / this.valueInterval * this.valueWidth) + this.widthRem);
			// Set limits
			if (!this.clearLimits) {
				this.leftBlock.firstChild.nextSibling.innerHTML = this.leftLimit;
				this.rightBlock.firstChild.nextSibling.innerHTML = this.rightLimit;
			}
			// Do it!
			this.setCurrentState();
			this.drawTicks();
			this.onMove();
			// Add handers
			var _this = this;
			this.addHandler (
				document,
				"mousemove",
				function(evt) {
					if (_this.moveState) _this.moveHandler(evt);
					if (_this.moveIntervalState) _this.moveIntervalHandler(evt);
				}
			);
			this.addHandler (
				document,
				"mouseup",
				function() {
					_this.moveState = false;
					_this.moveIntervalState = false;
				}
			);
			this.addHandler (
				this.leftBegun,
				"mousedown",
				function(evt) {
					evt = evt || window.event;
					if (evt.preventDefault) evt.preventDefault();
					evt.returnValue = false;
					_this.moveState = "left";
					_this.x0 = _this.defPosition(evt).x;
					_this.blockX0 = _this.leftWidth;
				}
			);
			this.addHandler (
				this.rightBegun,
				"mousedown",
				function(evt) {
					evt = evt || window.event;
					if (evt.preventDefault) evt.preventDefault();
					evt.returnValue = false;
					_this.moveState = "right";
					_this.x0 = _this.defPosition(evt).x;
					_this.blockX0 = _this.rightWidth;
				}
			);
			this.addHandler (
				this.centerBlock,
				"mousedown",
				function(evt) {
					evt = evt || window.event;
					if (evt.preventDefault) evt.preventDefault();
					evt.returnValue = false;
					_this.moveIntervalState = true;
					_this.intervalWidth = _this.width - _this.rightWidth - _this.leftWidth;
					_this.x0 = _this.defPosition(evt).x;
					_this.rightX0 = _this.rightWidth; 
					_this.leftX0 = _this.leftWidth;
				}
			),
			this.addHandler (
				this.centerBlock,
				"click",
				function(evt) {
					if (!_this.itWasMove) _this.clickMove(evt);
					_this.itWasMove = false;
				}
			);
			this.addHandler (
				this.leftBlock,
				"click",
				function(evt) {
					if (!_this.itWasMove)_this.clickMoveLeft(evt);
					_this.itWasMove = false;
				}
			);
			this.addHandler (
				this.rightBlock,
				"click",
				function(evt) {
					if (!_this.itWasMove)_this.clickMoveRight(evt);
					_this.itWasMove = false;
				}
			);
		} catch(e) {this.debug([1]);}
	},
	drawTicks : function() {
		if (this.showBigTicks) for (var i = 1; i <= this.bigTicks; i++) this.tickDiv.innerHTML += '<div style="left:'+(this.widthRem + i * this.valueWidth / (this.bigTicks + 1))+'px" class="tick"><span>' + parseInt(this.leftLimit + i * this.valueInterval/ (this.bigTicks + 1)) + '</span></div>';
		if (this.showSmallTicks) for (i = 1; i <= (this.smallTicks + 1) * (this.bigTicks + 1) - 1; i++) this.tickDiv.innerHTML += '<div style="left:'+(this.widthRem + i * this.valueWidth / ((this.smallTicks + 1) * (this.bigTicks + 1)))+'px" class="stick"></div>';
	},
	clickMoveRight : function(evt) {
		evt = evt || window.event;
		if (evt.preventDefault) evt.preventDefault();
		evt.returnValue = false;
		var x = this.defPosition(evt).x - this.absPosition(this.rightBlock).x;
		var w = this.rightBlock.offsetWidth;
		if (x <= 0 || w <= 0 || w < x || (w - x) < this.widthRem) return;
		this.rightWidth = (w - x);
		this.rightCounter();

		this.setCurrentState();
		this.onMove();
	},
	clickMoveLeft : function(evt) {
		evt = evt || window.event;
		if (evt.preventDefault) evt.preventDefault();
		evt.returnValue = false;
		var x = this.defPosition(evt).x - this.absPosition(this.leftBlock).x;
		var w = this.leftBlock.offsetWidth;
		if (x <= 0 || w <= 0 || w < x || x < this.widthRem) return;
		this.leftWidth = x;
		this.leftCounter();

		this.setCurrentState();
		this.onMove();
	},
	clickMove : function(evt) {
		evt = evt || window.event;
		if (evt.preventDefault) evt.preventDefault();
		evt.returnValue = false;
		var x = this.defPosition(evt).x - this.absPosition(this.centerBlock).x;
		var w = this.centerBlock.offsetWidth;
		if (x <= 0 || w <= 0 || w < x) return;
		if (x >= w / 2) {
			this.rightWidth += (w - x);
			this.rightCounter();
		} else {
			this.leftWidth += x;
			this.leftCounter();
		}
		this.setCurrentState();
		this.onMove();
	},
	setCurrentState : function() {
		this.leftBlock.style.width = this.leftWidth + "px";
		if (!this.clearValues) this.leftBlock.firstChild.innerHTML = (!this.dual && this.leftWidth > this.width / 2) ? "" : this.leftValue;
		if(!this.dual) {
			var x = this.leftBlock.firstChild.offsetWidth;
			this.leftBlock.firstChild.style.right = (this.widthRem * (1 - 2 * (this.leftWidth - this.widthRem) / this.width) - ((this.leftWidth - this.widthRem) * x / this.width)) + 'px';
		}
		this.rightBlock.style.width = this.rightWidth + "px";
		if (!this.clearValues) this.rightBlock.firstChild.innerHTML = (!this.dual && this.rightWidth >= this.width / 2) ? "" : this.rightValue;
		if(!this.dual) {
			var x = this.rightBlock.firstChild.offsetWidth;
			this.rightBlock.firstChild.style.left = (this.widthRem * (1 - 2 * (this.rightWidth - this.widthRem) / this.width) - ((this.rightWidth - this.widthRem) * x / this.width)) + 'px';
		}
	},
	moveHandler : function(evt) {
		this.itWasMove = true;
		evt = evt || window.event;
		if (evt.preventDefault) evt.preventDefault();
		evt.returnValue = false;
		if (this.moveState == "left") {
			this.leftWidth = this.blockX0 + this.defPosition(evt).x - this.x0;
			this.leftCounter();
		}
		if (this.moveState == "right") {
			this.rightWidth = this.blockX0 + this.x0 - this.defPosition(evt).x;
			this.rightCounter();
		}
		this.setCurrentState();
		this.onMove();
	},
	moveIntervalHandler : function(evt) {
		this.itWasMove = true;
		evt = evt || window.event;
		if (evt.preventDefault) evt.preventDefault();
		evt.returnValue = false;
		var dX = this.defPosition(evt).x - this.x0;
		if (dX > 0) {
			this.rightWidth = this.rightX0 - dX > this.widthRem ? this.rightX0 - dX : this.widthRem;
			this.leftWidth = this.width - this.rightWidth - this.intervalWidth;
		} else {
			this.leftWidth = this.leftX0 + dX > this.widthRem ? this.leftX0 + dX : this.widthRem;
			this.rightWidth = this.width - this.leftWidth - this.intervalWidth;
		}
		this.rightCounter();
		this.leftCounter();
		this.setCurrentState();
		this.onMove();
	},
	updateRightValue : function(rightValue) {
		try {
			this.rightValue = parseInt(rightValue);
			this.rightValue = this.rightValue < this.leftLimit ? this.leftLimit : this.rightValue;
			this.rightValue = this.rightValue > this.rightLimit ? this.rightLimit : this.rightValue;
			if (this.dual) {
				this.rightValue = this.rightValue < this.leftValue ? this.leftValue : this.rightValue;
			} else this.leftValue = this.rightValue;
			this.rightWidth = this.valueWidth - parseInt((this.rightValue - this.leftLimit) / this.valueInterval * this.valueWidth) + this.widthRem;
			this.rightWidth = isNaN(this.rightWidth) ? this.widthRem : this.rightWidth;
			if (!this.dual) this.leftWidth = this.width - this.rightWidth;
			this.setCurrentState();
		} catch(e) {}
	},
	rightCounter : function() {
		if (this.dual) {
			this.rightWidth = this.rightWidth > this.width - this.leftWidth ? this.width - this.leftWidth : this.rightWidth;
			this.rightWidth = this.rightWidth < this.widthRem ? this.widthRem : this.rightWidth;
			this.rightValue = this.leftLimit + this.valueInterval - parseInt((this.rightWidth - this.widthRem) / this.valueWidth * this.valueInterval);
			if (this.roundUp) this.rightValue = parseInt(this.rightValue / this.roundUp) * this.roundUp;
			if (this.leftWidth + this.rightWidth >= this.width) this.rightValue = this.leftValue;
		} else {
			this.rightWidth = this.rightWidth > (this.width - this.widthRem) ? this.width - this.widthRem : this.rightWidth;
			this.rightWidth = this.rightWidth < this.widthRem ? this.widthRem : this.rightWidth;
			this.leftWidth = this.width - this.rightWidth;
			this.rightValue = this.leftLimit + this.valueInterval - parseInt((this.rightWidth - this.widthRem) / this.valueWidth * this.valueInterval);
			if (this.roundUp) this.rightValue = parseInt(this.rightValue / this.roundUp) * this.roundUp;
			this.leftValue = this.rightValue;
		}
	},
	updateLeftValue : function(leftValue) {
		try {
			this.leftValue = parseInt(leftValue);
			this.leftValue = this.leftValue < this.leftLimit ? this.leftLimit : this.leftValue;
			this.leftValue = this.leftValue > this.rightLimit ? this.rightLimit : this.leftValue;
			if (this.dual) {
				this.leftValue = this.rightValue < this.leftValue ? this.rightValue : this.leftValue;
			} else this.rightValue = this.leftValue;
			this.leftWidth = parseInt((this.leftValue - this.leftLimit) / this.valueInterval * this.valueWidth) + this.widthRem;
			this.leftWidth = isNaN(this.leftWidth) ? this.widthRem : this.leftWidth;
			if (!this.dual) this.rightWidth = this.width - this.leftWidth;
			this.setCurrentState();
		} catch(e) {}
	},
	leftCounter : function() {
		if (this.dual) {
			this.leftWidth = this.leftWidth > this.width - this.rightWidth ? this.width - this.rightWidth : this.leftWidth;
			this.leftWidth = this.leftWidth < this.widthRem ? this.widthRem : this.leftWidth;
			this.leftValue = this.leftLimit + parseInt((this.leftWidth - this.widthRem) / this.valueWidth * this.valueInterval);
			if (this.roundUp) this.leftValue = parseInt(this.leftValue / this.roundUp) * this.roundUp;
			if (this.leftWidth + this.rightWidth >= this.width) this.leftValue = this.rightValue;
		} else {
			this.leftWidth = this.leftWidth > (this.width - this.widthRem) ? this.width - this.widthRem : this.leftWidth;
			this.leftWidth = this.leftWidth < this.widthRem ? this.widthRem : this.leftWidth;
			this.rightWidth = this.width - this.leftWidth;
			this.leftValue = this.leftLimit + parseInt((this.leftWidth - this.widthRem) / this.valueWidth * this.valueInterval);
			if (this.roundUp) this.leftValue = parseInt(this.leftValue / this.roundUp) * this.roundUp;
			this.rightValue = this.leftValue;
		}
	}
}