---

title: Spine align

layout: default

category: custom-layout-modes

---

<section id="copy">

  <p><a href="../docs/extending-isotope.html">Custom layout mode</a> that aligns items to the center, placing them either left or right of the spine. <code>gutterWidth</code> option available.</p>

{% highlight javascript %}

$container.isotope({

  layoutMode: 'spineAlign',

  spineAlign: {

    gutterWidth: 20

  },

  // options...

});

{% endhighlight %}

  <p>To use this layout mode, grab the <code>$.Isotope.prototype</code> methods from the script at the bottom of this page's source.</p>

</section>

<section id="options" class="clearfix">

  {% include filter-buttons.html %}

  {% include sort-buttons.html %}

  <h3>Etc</h3>

  <ul id="etc" class="clearfix">

    <li id="toggle-sizes"><a href="#toggle-sizes">Toggle variable sizes</a></li>

    <li id="insert"><a href="#insert">Insert new elements</a></li>

    <li id="append"><a href='#append'>Append new elements</a></li>

    <li id="shuffle"><a href='#shuffle'>Shuffle</a></li>

  </ul>

</section> <!-- #options -->

<div id="container" class="clickable variable-sizes clearfix">

  {% for elem_number in site.best_of_order %}

    {% assign element = site.elements[elem_number] %}

    {% include element-partial.html %}

  {% endfor %}

</div> <!-- #container -->

<script src="../{{ site.jquery_js }}"></script>

<script src="../{{ site.isotope_js }}"></script>

<script src="../js/fake-element.js"></script>

<script>

  // custom layout mode spineAlign

  $.Isotope.prototype._spineAlignReset = function() {

    this.spineAlign = {

      colA: 0,

      colB: 0

    };

  };

  $.Isotope.prototype._spineAlignLayout = function( $elems ) {

    var instance = this,

        props = this.spineAlign,

        gutterWidth = Math.round( this.options.spineAlign && this.options.spineAlign.gutterWidth ) || 0,

        centerX = Math.round(this.element.width() / 2);

    $elems.each(function(){

      var $this = $(this),

          isColA = props.colB > props.colA,

          x = isColA ?

            centerX - ( $this.outerWidth(true) + gutterWidth / 2 ) : // left side

            centerX + gutterWidth / 2, // right side

          y = isColA ? props.colA : props.colB;

      instance._pushPosition( $this, x, y );

      props[( isColA ? 'colA' : 'colB' )] += $this.outerHeight(true);

    });

  };

  $.Isotope.prototype._spineAlignGetContainerSize = function() {

    var size = {};

    size.height = this.spineAlign[( this.spineAlign.colB > this.spineAlign.colA ? 'colB' : 'colA' )];

    return size;

  };

  $.Isotope.prototype._spineAlignResizeChanged = function() {

    return true;

  };

  $(function(){

    var $container = $('#container');

    {% include random-sizes.js %}

    $container.isotope({

      itemSelector : '.element',

      layoutMode: 'spineAlign',

      spineAlign: {

        gutterWidth: 20

      },

      getSortData : {

        symbol : function( $elem ) {

          return $elem.attr('data-symbol');

        },

        category : function( $elem ) {

          return $elem.attr('data-category');

        },

        number : function( $elem ) {

          return parseInt( $elem.find('.number').text(), 10 );

        },

        weight : function( $elem ) {

          return parseFloat( $elem.find('.weight').text().replace( /[\(\)]/g, '') );

        },

        name : function ( $elem ) {

          return $elem.find('.name').text();

        }

      }

    });

    {% include option-set-buttons.js %}

    {% include add-buttons.js %}

    {% include change-sizes.js %}

    var $sortBy = $('#sort-by');

    $('#shuffle a').click(function(){

      $container.isotope('shuffle');

      $sortBy.find('.selected').removeClass('selected');

      $sortBy.find('[data-option-value="random"]').addClass('selected');

      return false;

    });

  });

</script>