---

title: Masonry Column Shift

layout: default

category: custom-layout-modes

---

<style>

  .shifty-item {

    width: 210px;

    margin: 10px;

    float: left;

    background: #AAA;

    border: 5px solid white;

  }

  .shifty-item:hover { z-index: 10; }

  .shifty-item.h1 { height: 140px; background: #66F; }

  .shifty-item.h2 { height: 200px; background: #F66; }

  .shifty-item.h3 { height: 240px; background: #6F6; }

  .shifty-item.h4 { height: 280px; background: #FF6; }

</style>

<section id="copy">

  <p>Custom layout mode <code>masonryColumnShift</code>. Enabled columns of a Masonry layout to be shifted and not affect other columns. After the size of an item element has changed, you can trigger a special <code>columnShiftOfItem</code> method that will push the column down. This layout only works with item elements that have the same width</p>

{% highlight javascript %}

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

$container.isotope({

  itemSelector: '.shifty-item',

  layoutMode: 'masonryColumnShift'

});

$container.find('.shifty-item').hover(

  function() {

    $(this).css({ height: "+=100" });

    // note that element is passed in, not jQuery object

    $container.isotope( 'shiftColumnOfItem', this );

  },

  function() {

    $(this).css({ height: "-=100" });

    $container.isotope( 'shiftColumnOfItem', this );

  }

);

{% endhighlight %}

</section>

<div id="container">

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h4"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h3"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h4"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h4"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h3"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h4"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h4"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h3"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h4"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h1"></div>

  <div class="shifty-item h2"></div>

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

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

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

<script>

  // -------------------------- Masonry Column Shift -------------------------- //

  // custom layout mode

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

    // layout-specific props

    var props = this.masonryColumnShift = {

      columnBricks: []

    };

    // FIXME shouldn't have to call this again

    this._getSegments();

    var i = props.cols;

    props.colYs = [];

    while (i--) {

      props.colYs.push( 0 );

      // push an array, for bricks in each column

      props.columnBricks.push([])

    }

  };

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

    var instance = this,

        props = instance.masonryColumnShift;

    $elems.each(function(){

      var $brick  = $(this);

      var setY = props.colYs;

      // get the minimum Y value from the columns

      var minimumY = Math.min.apply( Math, setY ),

          shortCol = 0;

      // Find index of short column, the first from the left

      for (var i=0, len = setY.length; i < len; i++) {

        if ( setY[i] === minimumY ) {

          shortCol = i;

          break;

        }

      }

      // position the brick

      var x = props.columnWidth * shortCol,

          y = minimumY;

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

      // keep track of columnIndex

      $.data( this, 'masonryColumnIndex', i );

      props.columnBricks[i].push( this );

      // apply setHeight to necessary columns

      var setHeight = minimumY + $brick.outerHeight(true),

          setSpan = props.cols + 1 - len;

      for ( i=0; i < setSpan; i++ ) {

        props.colYs[ shortCol + i ] = setHeight;

      }

    });

  };

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

    var containerHeight = Math.max.apply( Math, this.masonryColumnShift.colYs );

    return { height: containerHeight };

  };

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

    return this._checkIfSegmentsChanged();

  };

  $.Isotope.prototype.shiftColumnOfItem = function( itemElem, callback ) {

    var columnIndex = $.data( itemElem, 'masonryColumnIndex' );

    // don't proceed if no columnIndex

    if ( !isFinite(columnIndex) ) {

      return;

    }

    var props = this.masonryColumnShift;

    var columnBricks = props.columnBricks[ columnIndex ];

    var $brick;

    var x = props.columnWidth * columnIndex;

    var y = 0;

    for (var i=0, len = columnBricks.length; i < len; i++) {

      $brick = $( columnBricks[i] );

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

      y += $brick.outerHeight(true);

    }

    // set the size of the container

    if ( this.options.resizesContainer ) {

      var containerStyle = this._masonryColumnShiftGetContainerSize();

      containerStyle.height = Math.max( y, containerStyle.height );

      this.styleQueue.push({ $el: this.element, style: containerStyle });

    }

    this._processStyleQueue( $(columnBricks), callback )

  };

  $(function(){

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

    $container.isotope({

      itemSelector: '.shifty-item',

      layoutMode: 'masonryColumnShift'

    });

    $container.find('.shifty-item').hover(

      function() {

        $(this).css({ height: "+=100" });

        // note that element is passed in, not jQuery object

        $container.isotope( 'shiftColumnOfItem', this );

      },

      function() {

        $(this).css({ height: "-=100" });

        $container.isotope( 'shiftColumnOfItem', this );

      }

    );

  });

</script>