/***************************************************************
 *  JS-TrackBar
 *
 *   Copyright (C) 2008 by Alexander Burtsev - http://webew.ru/
 *   and abarmot - http://abarmot.habrahabr.ru/
 * 	 and 1602 - http://1602.habrahabr.ru/
 *   desing: Светлана Соловьева - http://my.mail.ru/bk/concur/
 *
 *  This code is a public domain.
 ***************************************************************/

(function($) {
	$.fn.trackbar = function(op, id){
		op = $.extend({
			onMove: function(){},
			dual: true,
			width: 250, // px
			leftLimit: 0, // unit of value
			leftValue: 500, // unit of value
			rightLimit: 5000, // unit of value
			rightValue: 1500, // unit of value
			//roundUp: 50, // unit of value
			jq: this
		},op);
		$.trackbar.getObject(id).init(op);
	}

	$.trackbar = { // NAMESPACE
		archive : [],
		getObject : function(id) {
			if(typeof id == 'undefined')id = this.archive.length;
			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 = 0; // px
		this.intervalWidth = 0; // px
		
		this.leftLimit = 0;
		this.leftValue = 0;
		this.rightLimit = 0;
		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;
		// Handlers
		this.onMove = null;
		// Nodes
		this.leftBlock = null;
		this.rightBlock = null;
		this.leftBegun = null;
		this.rightBegun = null;
		this.centerBlock = null;
		this.itWasMove = false;
	}

	$.trackbar.hotSearch.prototype = {
	// Const
		ERRORS : {
			1 : "Ошибка при инициализации объекта",
			2 : "Левый бегунок не найден",
			3 : "Правый бегунок не найден",
			4 : "Левая область ресайза не найдена",
			5 : "Правая область ресайза не найдена",
			6 : "Не задана ширина области бегунка",
			7 : "Не указано максимальное изменяемое значение",
			8 : "Не указана функция-обработчик значений",
			9 : "Не указана область клика"
		},
		LEFT_BLOCK_PREFIX : "leftBlock",
		RIGHT_BLOCK_PREFIX : "rightBlock",
		LEFT_BEGUN_PREFIX : "leftBegun",
		RIGHT_BEGUN_PREFIX : "rightBegun",
		CENTER_BLOCK_PREFIX : "centerBlock",
	// Methods
		// Default
		gebi : function(id) {
			return this.jq.find('#'+id)[0];
		},
		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}; 
		},
		// 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);
		},
		init : function(hash) {
			//try {
				this.dual = typeof hash.dual != "undefined" ? !!hash.dual : this.dual;
				this.leftLimit = hash.leftLimit || this.leftLimit;
				this.rightLimit = hash.rightLimit || this.rightLimit;
				this.width = hash.width || this.width;
				this.onMove = hash.onMove || this.onMove;
				this.clearLimits = hash.clearLimits || this.clearLimits;
				this.clearValues = hash.clearValues || this.clearValues;
				this.roundUp = hash.roundUp || this.roundUp;
				this.jq = hash.jq;
				// HTML Write
				this.jq.html('<table' + (this.width ? ' style="width:'+this.width+'px;"' : '') + 'class="trackbar" onSelectStart="return false;">\
					<tr>\
						<td class="l"><div id="leftBlock"><span></span><span class="limit"></span><img id="leftBegun" ondragstart="return false;" src="/templates/default/images/trackbar/b_l.gif" width="5" height="17" alt="" /></div></td>\
						<td class="c" id="centerBlock"></td>\
						<td class="r"><div id="rightBlock"><span></span><span class="limit"></span><img id="rightBegun" ondragstart="return false;" src="/templates/default/images/trackbar/b_r.gif" width="5" height="17" alt="" /></div></td>\
					</tr>\
				</table>');
				// Is all right?
				if (this.onMove == null) {
					this.debug([1,8]);
						return;
				}
				// ---
				this.leftBegun = this.gebi(this.LEFT_BEGUN_PREFIX);
				if (this.leftBegun == null) {
					this.debug([1,2]);
						return;
				}
				this.rightBegun = this.gebi(this.RIGHT_BEGUN_PREFIX);
				if (this.rightBegun == null) {
					this.debug([1,3]);
						return;
				}
				this.leftBlock = this.gebi(this.LEFT_BLOCK_PREFIX);
				if (this.leftBlock == null) {
					this.debug([1,4]);
						return;
				}
				this.rightBlock = this.gebi(this.RIGHT_BLOCK_PREFIX);
				if (this.rightBlock == null) {
					this.debug([1,5]);
						return;
				}
				this.centerBlock = this.gebi(this.CENTER_BLOCK_PREFIX);
				if (this.centerBlock == null) {
					this.debug([1,9]);
						return;
				}
				// ---
				if (!this.width) {
					this.debug([1,6]);
						return;
				}
				if (!this.rightLimit) {
					this.debug([1,7]);
						return;
				}
				// Set default
				this.valueWidth = this.width - 2 * this.widthRem;
				this.rightValue = hash.rightValue || this.rightLimit;
				this.leftValue = hash.leftValue || this.leftLimit;
				if (!this.dual) this.rightValue = this.leftValue;
				this.valueInterval = this.rightLimit - this.leftLimit;
				this.leftWidth = parseInt((this.leftValue - this.leftLimit) / this.valueInterval * this.valueWidth) + this.widthRem;
				this.rightWidth = 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.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]);}
		},
		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';
			}
		},
		/* OLD setCurrentState : function() {
			this.leftBlock.style.width = this.leftWidth + "px";
			this.leftBlock.firstChild.innerHTML = (!this.dual && this.leftWidth > this.width / 2) ? "" : this.leftValue;
			this.rightBlock.style.width = this.rightWidth + "px";
			this.rightBlock.firstChild.innerHTML = (!this.dual && this.rightWidth >= this.width / 2) ? "" : this.rightValue;
		},*/
		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;
			}
		}
	}
})(jQuery);