views:

31

answers:

1

This is my first time using JQuery in any of my projects.

I have implemented the superfish menu.

On some of my pages I have a horizontal scroll. I would like to make the menu float on the center of the page as the page is scrolled.

Also I need to make sure that the submenu on the far right hand side of the menu does not open up off the page. When I hover on the right most element it opens up half off the page.

Any ideas on how to fix these two things?

I'm perfectly willing to use a different Jquery menu if there is a better one that has these features built in...

Thanks!

javascrupt call in my page:

$(document).ready(function () {
        $("ul.sf-menu").supersubs({
            minWidth: 12,   // minimum width of sub-menus in em units 
            maxWidth: 27,   // maximum width of sub-menus in em units 
            extraWidth: 1     // extra width can ensure lines don't sometimes turn over 
            // due to slight rounding differences and font-family 
        }).superfish({ animation: { opacity: 'show', height: 'show' }, autoArrows: false });  // call supersubs first, then superfish, so that subs are 
        // not display:none when measuring. Call before initialising 
        // containing tabs for same reason. 

I can post any more code that is needed, but there is quite a lot of code in the superfish files so i'm not sure what I should post.

I found this script and it works well, however when I scroll right the horizonal menu starts to stack so the menu items are side by side rather then vertical. I want to modify this to keep the menu horizonal...

<script type="text/javascript"><!--
            var floatingMenuId = 'floatdiv';
            var floatingMenu =

{ targetX: -1000, targetY: 10,

hasInner: typeof (window.innerWidth) == 'number',
hasElement: document.documentElement
    && document.documentElement.clientWidth,

menu:
    document.getElementById
    ? document.getElementById(floatingMenuId)
    : document.all
      ? document.all[floatingMenuId]
      : document.layers[floatingMenuId]

};

            floatingMenu.move = function () {
                if (document.layers) {
                    floatingMenu.menu.left = floatingMenu.nextX;
                    floatingMenu.menu.top = floatingMenu.nextY;
                }
                else {
                    floatingMenu.menu.style.left = floatingMenu.nextX + 'px';
                    floatingMenu.menu.style.top = floatingMenu.nextY + 'px';
                }
            }

            floatingMenu.computeShifts = function () {
                var de = document.documentElement;

                floatingMenu.shiftX =
    floatingMenu.hasInner
    ? pageXOffset
    : floatingMenu.hasElement
      ? de.scrollLeft
      : document.body.scrollLeft;
                if (floatingMenu.targetX < 0) {
                    if (floatingMenu.hasElement && floatingMenu.hasInner) {
                        // Handle Opera 8 problems    
                        floatingMenu.shiftX +=
            de.clientWidth > window.innerWidth
            ? window.innerWidth
            : de.clientWidth
                    }
                    else {
                        floatingMenu.shiftX +=
            floatingMenu.hasElement
            ? de.clientWidth
            : floatingMenu.hasInner
              ? window.innerWidth
              : document.body.clientWidth;
                    }
                }

                floatingMenu.shiftY =
    floatingMenu.hasInner
    ? pageYOffset
    : floatingMenu.hasElement
      ? de.scrollTop
      : document.body.scrollTop;
                if (floatingMenu.targetY < 0) {
                    if (floatingMenu.hasElement && floatingMenu.hasInner) {
                        // Handle Opera 8 problems    
                        floatingMenu.shiftY +=
            de.clientHeight > window.innerHeight
            ? window.innerHeight
            : de.clientHeight
                    }
                    else {
                        floatingMenu.shiftY +=
            floatingMenu.hasElement
            ? document.documentElement.clientHeight
            : floatingMenu.hasInner
              ? window.innerHeight
              : document.body.clientHeight;
                    }
                }
            }

            floatingMenu.doFloat = function () {
                var stepX, stepY;

                floatingMenu.computeShifts();

                stepX = (floatingMenu.shiftX +
    floatingMenu.targetX - floatingMenu.nextX) * .07;
                if (Math.abs(stepX) < .5) {
                    stepX = floatingMenu.shiftX +
        floatingMenu.targetX - floatingMenu.nextX;
                }

                stepY = (floatingMenu.shiftY +
    floatingMenu.targetY - floatingMenu.nextY) * .07;
                if (Math.abs(stepY) < .5) {
                    stepY = floatingMenu.shiftY +
        floatingMenu.targetY - floatingMenu.nextY;
                }

                if (Math.abs(stepX) > 0 ||
    Math.abs(stepY) > 0) {
                    floatingMenu.nextX += stepX;
                    floatingMenu.nextY += stepY;
                    floatingMenu.move();
                }

                setTimeout('floatingMenu.doFloat()', 20);
            };

            // addEvent designed by Aaron Moore    
            floatingMenu.addEvent = function (element, listener, handler) {
                if (typeof element[listener] != 'function' ||
   typeof element[listener + '_num'] == 'undefined') {
                    element[listener + '_num'] = 0;
                    if (typeof element[listener] == 'function') {
                        element[listener + 0] = element[listener];
                        element[listener + '_num']++;
                    }
                    element[listener] = function (e) {
                        var r = true;
                        e = (e) ? e : window.event;
                        for (var i = element[listener + '_num'] - 1; i >= 0; i--) {
                            if (element[listener + i](e) == false)
                                r = false;
                        }
                        return r;
                    }
                }

                //if handler is not already stored, assign it    
                for (var i = 0; i < element[listener + '_num']; i++)
                    if (element[listener + i] == handler)
                        return;
                element[listener + element[listener + '_num']] = handler;
                element[listener + '_num']++;
            };

            floatingMenu.init = function () {
                floatingMenu.initSecondary();
                floatingMenu.doFloat();
            };

            // Some browsers init scrollbars only after    
            // full document load.    
            floatingMenu.initSecondary = function () {
                floatingMenu.computeShifts();
                floatingMenu.nextX = floatingMenu.shiftX +
    floatingMenu.targetX;
                floatingMenu.nextY = floatingMenu.shiftY +
    floatingMenu.targetY;
                floatingMenu.move();
            }

            if (document.layers)
                floatingMenu.addEvent(window, 'onload', floatingMenu.init);
            else {
                floatingMenu.init();
                floatingMenu.addEvent(window, 'onload',
    floatingMenu.initSecondary);
            }    

    </script> 
A: 

I'm not sure on how you mean centering, but if you mean horizontally centered:

Could you separate the main page (that horizontally overflows) and the menu into separate div's? e.g.

<div id="menu"><center><ul class="sf-menu">...</ul></center></div>
<div id="mainpage" style="overflow:auto;">Contents goes here</div>

(the <center> tag might have to be <div style="width:X;margin:0 auto;"> depending on how superfish works)

On the menu going over the page, sorry I'll have to defer to someone more knowable to answer that.

PhilI
but this wont keep the menu centered on the screen as I scroll... maybe i'm being unclear...
kralco626
Could you explain a bit more fully, or give a link to a site which does what your trying to achieve?
PhilI
if you go to this site there is a little floating menu on the side: http://www.dynamicdrive.com/dynamicindex1/staticmenu.htm I want to do that, except I have a horizonal menu and I want to keep it centered
kralco626
oh and for the menu going off the right hand side of the page check out: http://www.whitehouse.gov/ notice how the submenu on the right most menu item goes left, rather then right and off the page...
kralco626
For the menu placement it sounds like you need fixed positioning something like `<body><div style="position:fixed;top:0px;width:100%;"><div id='menu' style="width:200px;height:20px;margin:0 auto;"></div></div></body>`.
PhilI