PC User 2003 August/Australian PC User - August 2003 (CD2).iso/tutorial/macromed/files/firewks/menu_files/globalnav.js

JavaScript | 2003-03-12 | 5.0 KB | 197 lines

/*
    Copyright (c) 2002-2003 Macromedia, Inc.
    globalnav scripts
    Language: JavaScript 1.2
*/

var calculatedOffset;

function getElementOffset(element) {
    calculatedOffset = 0;
    if (element != null)    {
        elementOffset = calculateOffset_Y(element);
    }
    return elementOffset;
}

function calculateOffset_Y(element) {
    if (element != null)    {
        calculatedOffset += element.offsetTop;
        if (element.offsetParent) {
            if ((element.offsetParent == document.body) ||
                    (element.offsetParent.tagName == ('HTML'||'BODY'))) {
                return calculatedOffset;
            } else {
                return calculateOffset_Y(element.offsetParent);
            }
        } else {
            return calculatedOffset;
        }
    }
}

function isOverlapped(element,minOffset) {
    var overlapped;
    if (element && minOffset) {
        var offset = getElementOffset(element);
        overlapped = ((offset < minOffset) ? true : false);
    }
    return overlapped;
}

function checkIsFlash(element) {
    var isFlash;
    var type = element.type.toLowerCase();
    var codebase = element.getAttribute('codebase');
    if ((type.indexOf('flash') != -1) ||
            (codebase.indexOf('swflash.cab') != -1)) {
        isFlash = true;
    } else {
        isFlash = false;
    }
    return isFlash;
}

function setVisibilityOnOverlap(elements,minOffset) {
    if (elements && minOffset) {
        for (var i=0; i < elements.length; i++) {
            var currentElement = elements[i];
            if ((checkIsFlash(currentElement) == false) &&
                    (isOverlapped(currentElement,minOffset) == true)) {
                currentElement.style.visibility = 'hidden';
            } else {
                currentElement.style.visibility = 'visible';
            }
        }
    }
}


function setFormVisibilityOnOverlap(minOffset) {
    if (minOffset != null) {
        for (var i=0; i < document.forms.length; i++) {
            var currentForm = document.forms[i];
            for (var j=0; j < currentForm.elements.length; j++) {
                var currentElement = currentForm.elements[j];
                if (isOverlapped(currentElement,minOffset) == true) {
                    if (currentElement.type.indexOf('select') != -1) {
                        currentElement.style.visibility = 'hidden';
                    } else {
                        currentElement.disabled = true;
                    }
                } else {
                    currentElement.style.visibility = 'visible';
                    currentElement.disabled = false;
                }
            }
        }
    }
}

function checkElementOverlap(minOffset) {
    var docObjects = document.getElementsByTagName('object');
    setVisibilityOnOverlap(docObjects,minOffset);
    setVisibilityOnOverlap(document.embeds,minOffset);
    setFormVisibilityOnOverlap(minOffset);
}

function setSWFHeight(h) {
    if (this.swf_object != null) {
        this.swf_object.setAttribute('height',h);
    }
    if (this.swf_embed != null) {
        this.swf_embed.setAttribute('height',h);
    }
}

function expandNav(h) {
    this.checkElements(h);
    this.myDIV.style.height = h+'px';
    this.setSWFHeight(h);
}

function colapseNav(h) {
    this.setSWFHeight(h)
    this.myDIV.style.height = h+'px';
    this.checkElements(h);
}

function setHeight(h,overlap) {
    if (h != null) {
        if ((overlap == null) || (overlap == true)) {
            (this.currentHeight < h) ? this.expandNav(h) : this.colapseNav(h);
        }
        else if (overlap == false) {
            positionContent(h);
            this.setSWFHeight(h);
        }
        this.currentHeight = h;
    }
}

GlobalNav = function(swf,height) {
    /* properties */
    this.swf = swf;
    this.swf_object = document.getElementById('mmglobalnav_object');
    this.swf_embed = document.getElementById('mmglobalnav_embed');
    this.myDIV = document.getElementById('globalnav');
    this.currentHeight = (height ? height : this.swf_object.height);
    /* methods */
    this.checkElements = checkElementOverlap;
    this.setSWFHeight = setSWFHeight;
    this.setHeight = setHeight;
    this.colapseNav = colapseNav;
    this.expandNav = expandNav;
}

// called by globalnav.swf
// sets the mediapref cookie
function setFlash(flash_version_string) {
    var pixelName = 'flash_pixel';
    if (document[pixelName] && flash_version_string) {
        document[pixelName].src = '/set_media_pref?'+flash_version_string;
    }
}

//
var mmglobalnav;
//
function initGlobalNav(swf,h) {
    if (document.getElementById('mmglobalnav_object') ||
            document.getElementById('mmglobalnav_embed')) {
        mmglobalnav = new GlobalNav(swf,h);
        if (h == null) h = mmglobalnav.currentHeight;
        window.setTimeout('mmglobalnav.setHeight('+h+',false)',200);
    }
}

function positionContent(y) {
    if (y != null) {
        var contentBox = document.getElementById('contentWrapper');
        contentBox.style.top = y + 'px';
    }
}

function adjustForGlobalMessaging() {
    if (document.getElementById('globalmessaging') &&
            document.getElementById('globalmessage')) {
        var message_gif = document.getElementById('globalmessage');
        var y = 64 + message_gif.height + 8; // globalnav gifs + message gif + margin
        positionContent(y);
    }
}

function defineFunctions() {
    if (!document.getElementById) {
        if (document.layers) document.getElementById = function() { return; }
        if (document.all) document.getElementById = function(str) { return document.all[str]; }
    }
}

function initPage() {
    defineFunctions();
    initGlobalNav('globalnav.swf',64);// Flash version of globalnav only
    adjustForGlobalMessaging();                // GIF version of globalnav only
}

/* END */