jquery - Scroll a div based on a draggable element (reversed) -

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i found code scrolling div via draggable element. don't quite understand posted answer , want in reverse.

original here : scroll div based on draggable element

http://jsfiddle.net/xnlse/8/

i modified fiddle , made scroll down on load, original answer works without scrolling content down.

i added block scroll down

    //modification var timeline = $('#timeline'); var tlparent = timeline.parent(); var tlheight = parseint(timeline.css("height")); var tlpheight = parseint(tlparent.css("height"));  //scroll down content on load var newpos = 0 - (tlheight - tlpheight); timeline.animate({"top":newpos + "px"},800,"linear"); //end modification

my modification : http://jsfiddle.net/j3toxicat3d/hxbgd/

help anyone? thanks

hey battled script , got working in reverse -

//modification var timeline = $('#timeline'); var tlparent = timeline.parent(); var tlheight = timeline.height(); var tlpheight = tlparent.height();  //scroll down content on load var lastdirection , newpos = tlheight - tlpheight; $('#timeline_wrapper').animate({scrolltop:newpos + "px"},800,"linear"); //end modification   var $controller = $('#controller')     , scrollableheight = $('#timeline').height() - $('#timeline_wrapper').height()     , draggablewidth = $('#horizontal_control').width() - $controller.width()     , ratio = scrollableheight / draggablewidth     , initialoffset = $controller.offset().left;  $controller.draggable({     revert: false,     containment: "parent",     axis: "x",     drag: function (event, ui) {         var distance = ui.offset.left - initialoffset         , currentpos = $('#timeline_wrapper').scrolltop();         var direction = ui.position.left;         (lastdirection < direction) ? $('#timeline_wrapper').scrolltop(currentpos - distance) : $('#timeline_wrapper').scrolltop(currentpos + distance);         lastdirection = ui.position.left;     } });

i think you'll notice modified.

here working jsfiddle demo


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