// Accordion.js
// Javascript Behaviour for the AccordionBehaviour Control
// Copyright (c) by Matthias Hertel, http://www.mathertel.de
// This work is licensed under a BSD style license. See http://www.mathertel.de/License.aspx
// ----- 
// 13.05.2007 created by Matthias Hertel
var AccordionBehaviour = {
    timer: null, // reference to the timer used for the transitions

    // ----- Events -----
    onclick: function(evt) {
        evt = evt || window.event;
        if (this.timer == null)
            this.SlideOpen(evt);
    }, // onclick
    // ----- Methods -----

    // setup the timer and start the size transitions
    SlideOpen: function(evt) {
        evt = evt || window.event;
        var h, c, obj = evt.srcElement;

        // search the HEADER
        while ((obj != null) && (obj != this) && (obj.className != "VEACCORDIONHEADER"))
            obj = obj.parentNode;
        if ((obj != null) && (obj != this) && (obj.className == "VEACCORDIONHEADER"))
            obj.className = "VEACCORDIONHEADERACTIVE";
        h = obj;

        // search the next CONTENT
        while ((obj != null) && (obj != this) && (obj.className != "VEACCORDIONCONTENT"))
            obj = obj.nextSibling;

        if ((obj != null) && (obj != this) && (obj.className == "VEACCORDIONCONTENT")) {
            c = obj;
            c.style.height = "0px";
            c.className = "VEACCORDIONCONTENTACTIVE";

            // adjustClassNames
            var allElements = this.getElementsByTagName("div");
            for (var n = 0; n < allElements.length; n++) {
                var obj = allElements[n];
                if ((obj.className == "VEACCORDIONHEADERACTIVE") && (obj != h))
                    obj.className = "VEACCORDIONHEADER";
                if ((obj.className == "VEACCORDIONCONTENTACTIVE") && (obj != c))
                    obj.className = "VEACCORDIONCONTENT";
            } // for


            var parentElement = document.getElementById("accordion_leftMenu");
            if (parentElement != this) {
                var allElements = parentElement.getElementsByTagName("div");
                for (var n = 0; n < allElements.length; n++) {
                    var obj = allElements[n];
                    if ((obj.className == "VEACCORDIONHEADERACTIVE"))
                        obj.className = "VEACCORDIONHEADER";
                    if ((obj.className == "VEACCORDIONCONTENTACTIVE"))
                        obj.className = "VEACCORDIONCONTENT";
                }
            }
            parentElement = document.getElementById("accordion_leftMenuJ");
            if (parentElement != this) {

                allElements = parentElement.getElementsByTagName("div");
                for (var n = 0; n < allElements.length; n++) {
                    var obj = allElements[n];
                    if ((obj.className == "VEACCORDIONHEADERACTIVE"))
                        obj.className = "VEACCORDIONHEADER";
                    if ((obj.className == "VEACCORDIONCONTENTACTIVE"))
                        obj.className = "VEACCORDIONCONTENT";
                }
            }
            parentElement = document.getElementById("accordion_leftMenuANT");
            if (parentElement != this) {
                allElements = parentElement.getElementsByTagName("div");
                for (var n = 0; n < allElements.length; n++) {
                    var obj = allElements[n];
                    if ((obj.className == "VEACCORDIONHEADERACTIVE"))
                        obj.className = "VEACCORDIONHEADER";
                    if ((obj.className == "VEACCORDIONCONTENTACTIVE"))
                        obj.className = "VEACCORDIONCONTENT";
                }
            }
            parentElement = document.getElementById("accordion_leftMenuRE");
            if (parentElement != this) {

                allElements = parentElement.getElementsByTagName("div");
                for (var n = 0; n < allElements.length; n++) {
                    var obj = allElements[n];
                    if ((obj.className == "VEACCORDIONHEADERACTIVE"))
                        obj.className = "VEACCORDIONHEADER";
                    if ((obj.className == "VEACCORDIONCONTENTACTIVE"))
                        obj.className = "VEACCORDIONCONTENT";
                }
            }
            parentElement = document.getElementById("accordion_leftMenuG");
            if (parentElement != this) {
                allElements = parentElement.getElementsByTagName("div");
                for (var n = 0; n < allElements.length; n++) {
                    var obj = allElements[n];
                    if ((obj.className == "VEACCORDIONHEADERACTIVE"))
                        obj.className = "VEACCORDIONHEADER";
                    if ((obj.className == "VEACCORDIONCONTENTACTIVE"))
                        obj.className = "VEACCORDIONCONTENT";
                }
            }
            // start sliding...
            //this.timer = window.setTimeout(this._resizeItem.bind(this), 5);
            parentElement = document.getElementById("accordion_leftMenu");
            parentElement.timer = window.setTimeout(parentElement._resizeItem.bind(parentElement), 5);
            parentElement = document.getElementById("accordion_leftMenuJ");
            parentElement.timer = window.setTimeout(parentElement._resizeItem.bind(parentElement), 5);
            parentElement = document.getElementById("accordion_leftMenuANT");
            parentElement.timer = window.setTimeout(parentElement._resizeItem.bind(parentElement), 5);
            parentElement = document.getElementById("accordion_leftMenuRE");
            parentElement.timer = window.setTimeout(parentElement._resizeItem.bind(parentElement), 5);
            parentElement = document.getElementById("accordion_leftMenuG");
            parentElement.timer = window.setTimeout(parentElement._resizeItem.bind(parentElement), 5);
        } // if
    }, // SlideOpen


    _resizeItem: function(obj) {
        var allElements = this.getElementsByTagName("div");
        var isFinished = true;
        var delta;

        this.timer = null;

        for (var n = 0; n < allElements.length; n++) {
            var obj = allElements[n];
            if (obj.className == "VEACCORDIONCONTENTACTIVE") {
                // enlarge
                delta = obj.scrollHeight - obj.offsetHeight;
                if (delta <= 0) {
                    // nothing.
                } else if ((delta <= 2) && (delta > 0)) {
                    // snap exactly
                    obj.style.height = obj.offsetHeight + "px";
                } else {
                    obj.style.height = Math.round(obj.offsetHeight + Math.max(2, Math.min(12, delta / 3))) + "px";
                    isFinished = false;
                } // if

            } else if (obj.className == "VEACCORDIONCONTENT") {
                // shrink
                delta = obj.offsetHeight;
                if (delta <= 0) {
                    // nothing.
                } else if (delta <= 2) {
                    // snap exactly
                    obj.style.height = "0px";
                } else {
                    obj.style.height = Math.round(obj.offsetHeight - Math.max(2, Math.min(12, delta / 3))) + "px";
                    isFinished = false;
                } // if
            }
        } // for
        if (!isFinished)
            this.timer = window.setTimeout(this._resizeItem.bind(this), 20);
    } // _resizeItem
} // AccordionBehaviour
// End