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295

answers:

0

This is EXACTLY what I want- except I can't figure out the correct way to modify it to be horizontal instead of vertical.

I'm sure this would take an experienced dev a quick second so I hope someone can help.

(I tried to swap out all the 'Top's, 'Bottoms', & 'Height's with 'Left' Right' and 'Width'- but I didn't do it correctly apparently )

I posted the question on their message boards- but this forum is alot livelier so I hope someone can help.

THANKS!

Here is the "jquery.scroll-follow.js" plugin I would like to modify:

`( function( $ ) {

$.scrollFollow = function ( box, options )
{ 
    // Convert box into a jQuery object
    box = $( box );

    // 'box' is the object to be animated
    var position = box.css( 'position' );

    function ani()
    {       
        // The script runs on every scroll which really means many times during a scroll.
        // We don't want multiple slides to queue up.
        box.queue( [ ] );

        // A bunch of values we need to determine where to animate to
        var viewportHeight = parseInt( $( window ).height() );  
        var pageScroll =  parseInt( $( document ).scrollTop() );
        var parentTop =  parseInt( box.cont.offset().top );
        var parentHeight = parseInt( box.cont.attr( 'offsetHeight' ) );
        var boxHeight = parseInt( box.attr( 'offsetHeight' ) + ( parseInt( box.css( 'marginTop' ) ) || 0 ) + ( parseInt( box.css( 'marginBottom' ) ) || 0 ) );
        var aniTop;

        // Make sure the user wants the animation to happen
        if ( isActive )
        {
            // If the box should animate relative to the top of the window
            if ( options.relativeTo == 'top' )
            {
                // Don't animate until the top of the window is close enough to the top of the box
                if ( box.initialOffsetTop >= ( pageScroll + options.offset ) )
                {
                    aniTop = box.initialTop;
                }
                else
                {
                    aniTop = Math.min( ( Math.max( ( -parentTop ), ( pageScroll - box.initialOffsetTop + box.initialTop ) ) + options.offset ), ( parentHeight - boxHeight - box.paddingAdjustment ) );
                }
            }
            // If the box should animate relative to the bottom of the window
            else if ( options.relativeTo == 'bottom' )
            {
                // Don't animate until the bottom of the window is close enough to the bottom of the box
                if ( ( box.initialOffsetTop + boxHeight ) >= ( pageScroll + options.offset + viewportHeight ) )
                {
                    aniTop = box.initialTop;
                }
                else
                {
                    aniTop = Math.min( ( pageScroll + viewportHeight - boxHeight - options.offset ), ( parentHeight - boxHeight ) );
                }
            }

            // Checks to see if the relevant scroll was the last one
            // "-20" is to account for inaccuracy in the timeout
            if ( ( new Date().getTime() - box.lastScroll ) >= ( options.delay - 20 ) )
            {
                box.animate(
                    {
                        top: aniTop
                    }, options.speed, options.easing
                );
            }
        }
    };

    // For user-initiated stopping of the slide
    var isActive = true;

    if ( $.cookie != undefined )
    {
        if( $.cookie( 'scrollFollowSetting' + box.attr( 'id' ) ) == 'false' )
        {
            var isActive = false;

            $( '#' + options.killSwitch ).text( options.offText )
                .toggle( 
                    function ()
                    {
                        isActive = true;

                        $( this ).text( options.onText );

                        $.cookie( 'scrollFollowSetting' + box.attr( 'id' ), true, { expires: 365, path: '/'} );

                        ani();
                    },
                    function ()
                    {
                        isActive = false;

                        $( this ).text( options.offText );

                        box.animate(
                            {
                                top: box.initialTop
                            }, options.speed, options.easing
                        );  

                        $.cookie( 'scrollFollowSetting' + box.attr( 'id' ), false, { expires: 365, path: '/'} );
                    }
                );
        }
        else
        {
            $( '#' + options.killSwitch ).text( options.onText )
                .toggle( 
                    function ()
                    {
                        isActive = false;

                        $( this ).text( options.offText );

                        box.animate(
                            {
                                top: box.initialTop
                            }, 0
                        );  

                        $.cookie( 'scrollFollowSetting' + box.attr( 'id' ), false, { expires: 365, path: '/'} );
                    },
                    function ()
                    {
                        isActive = true;

                        $( this ).text( options.onText );

                        $.cookie( 'scrollFollowSetting' + box.attr( 'id' ), true, { expires: 365, path: '/'} );

                        ani();
                    }
                );
        }
    }

    // If no parent ID was specified, and the immediate parent does not have an ID
    // options.container will be undefined. So we need to figure out the parent element.
    if ( options.container == '')
    {
        box.cont = box.parent();
    }
    else
    {
        box.cont = $( '#' + options.container );
    }

    // Finds the default positioning of the box.
    box.initialOffsetTop =  parseInt( box.offset().top );
    box.initialTop = parseInt( box.css( 'top' ) ) || 0;

    // Hack to fix different treatment of boxes positioned 'absolute' and 'relative'
    if ( box.css( 'position' ) == 'relative' )
    {
        box.paddingAdjustment = parseInt( box.cont.css( 'paddingTop' ) ) + parseInt( box.cont.css( 'paddingBottom' ) );
    }
    else
    {
        box.paddingAdjustment = 0;
    }

    // Animate the box when the page is scrolled
    $( window ).scroll( function ()
        {
            // Sets up the delay of the animation
            $.fn.scrollFollow.interval = setTimeout( function(){ ani();} , options.delay );

            // To check against right before setting the animation
            box.lastScroll = new Date().getTime();
        }
    );

    // Animate the box when the page is resized
    $( window ).resize( function ()
        {
            // Sets up the delay of the animation
            $.fn.scrollFollow.interval = setTimeout( function(){ ani();} , options.delay );

            // To check against right before setting the animation
            box.lastScroll = new Date().getTime();
        }
    );

    // Run an initial animation on page load
    box.lastScroll = 0;

    ani();
};

$.fn.scrollFollow = function ( options )
{
    options = options || {};
    options.relativeTo = options.relativeTo || 'top';
    options.speed = options.speed || 500;
    options.offset = options.offset || 0;
    options.easing = options.easing || 'swing';
    options.container = options.container || this.parent().attr( 'id' );
    options.killSwitch = options.killSwitch || 'killSwitch';
    options.onText = options.onText || 'Turn Slide Off';
    options.offText = options.offText || 'Turn Slide On';
    options.delay = options.delay || 0;

    this.each( function() 
        {
            new $.scrollFollow( this, options );
        }
    );

    return this;
};

})( jQuery );

`