File: zf1_generator/assets/js/jquery-scroll-pane.js

$(function() {
    //scrollpane parts
    var scrollPane = $( ".scroll-pane" ),
    scrollContent = $( ".scroll-content" );

    //build slider
    var scrollbar = $( ".scroll-bar" ).slider({
        slide: function( event, ui ) {
            if ( scrollContent.width() > scrollPane.width() ) {
                scrollContent.css( "margin-left", Math.round(
                ui.value / 100 * ( scrollPane.width() - scrollContent.width() )
            ) + "px" );
            } else {
                scrollContent.css( "margin-left", 0 );
            }
        }
    });

    //append icon to handle
    var handleHelper = scrollbar.find( ".ui-slider-handle" )
    .mousedown(function() {
        scrollbar.width( handleHelper.width() );
    })
    .mouseup(function() {
        scrollbar.width( "100%" );
    })
    .append( "<span class='ui-icon ui-icon-grip-dotted-vertical'></span>" )
    .wrap( "<div class='ui-handle-helper-parent'></div>" ).parent();

    //change overflow to hidden now that slider handles the scrolling
    scrollPane.css( "overflow", "hidden" );

    //size scrollbar and handle proportionally to scroll distance
    function sizeScrollbar() {
        var remainder = scrollContent.width() - scrollPane.width();
        var proportion = remainder / scrollContent.width();
        var handleSize = scrollPane.width() - ( proportion * scrollPane.width() );
        scrollbar.find( ".ui-slider-handle" ).css({
            width: handleSize,
            "margin-left": -handleSize / 2
        });
        handleHelper.width( "" ).width( scrollbar.width() - handleSize );
    }

    //reset slider value based on scroll content position
    function resetValue() {
        var remainder = scrollPane.width() - scrollContent.width();
        var leftVal = scrollContent.css( "margin-left" ) === "auto" ? 0 :
            parseInt( scrollContent.css( "margin-left" ) );
        var percentage = Math.round( leftVal / remainder * 100 );
        scrollbar.slider( "value", percentage );
    }

    //if the slider is 100% and window gets larger, reveal content
    function reflowContent() {
        var showing = scrollContent.width() + parseInt( scrollContent.css( "margin-left" ), 10 );
        var gap = scrollPane.width() - showing;
        if ( gap > 0 ) {
            scrollContent.css( "margin-left", parseInt( scrollContent.css( "margin-left" ), 10 ) + gap );
        }
    }

    //change handle position on window resize
    $( window ).resize(function() {
        resetValue();
        sizeScrollbar();
        reflowContent();
    });
    //init scrollbar size
    setTimeout( sizeScrollbar, 10 );//safari wants a timeout
});