/***************************************************************
 *  JS-TrackBar
 *
 *   Copyright (C) 2008 by Alexander Burtsev - webew.ru
 *   and abarmot - http://abarmot.habrahabr.ru/
 *   desing: Светлана Соловьева - http://my.mail.ru/bk/concur/
 *
 *  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 = 0; // px
    this.intervalWidth = 0; // px

    this.leftLimit = 0;
    this.leftValue = 0;
    this.rightLimit = 0;
    this.rightValue = 0;
    this.valueInterval = 0;
    this.widthRem = 15;
    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 = false;
    this.clearLimits = false;
    this.clearValues = false;
    this.nodeInit = false;
    // Handlers
    this.onMove = null;
    this.onMouseUp = 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 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);
    },
    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 {
            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;
            // HTML Write
            var code = '<table' + (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="../images/imgtrackbar/b_l2.gif" width="15" height="22" alt="" style="position:relative;top:-4px;"  /></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="../images/imgtrackbar/b_l2.gif" width="15" height="22" alt="" style="position:relative;top:-4px;" /></div></td>\
				</tr>\
			</table>';
            if (node) node.innerHTML = code;
            else document.write(code)
            // Is all right?
            if (this.onMove == null) {
                this.debug([1, 8]);
                return;
            }
            // ---
            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;
            }
            // ---
            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.moveIntervalState = false;
				    if (_this.moveState && _this.onMouseUp != null) _this.onMouseUp(_this.leftValue, _this.rightValue);
				    _this.moveState = 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';
        }
    },
    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;
        }
    }
}