--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/enmi12/glossaire/_posts/custom-layout-modes/2012-01-03-masonry-column-shift.html	Wed Nov 06 03:21:17 2013 +0000
@@ -0,0 +1,220 @@
+---
+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>
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