/dist/components/isotope/_posts/custom-layout-modes/2011-12-05-big-graph.html

---
title: BIG Graph
layout: default
category: custom-layout-modes
---

<section id="copy">
  <p><a href="../docs/extending-isotope.html">Custom layout mode</a> to replicate the Flash interface of <a href="http://big.dk">big.dk</a>. Similiar to <a href="category-rows.html">Category rows</a>, item elements are grouped by their sorting data into columns.</p>

{% highlight javascript %}

$container.isotope({
  layoutMode: 'bigGraph',
  bigGraph: {
    columnWidth: 45, // size of item
    rowHeight: 45, // size of item
    maxRows: 11, // max number of items vertically
    gutterWidth: { // width of gutter, needs to match getSortData names
      year: 0,
      scale: 60,
      program: 40,
      status: 60,
      title: 0
    }
  },
  // 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">

    <h3>Sort</h3>

    <ul id="sort-by" class="option-set clearfix" data-option-key="sortBy">
      <li><a href="#sortBy=year" data-option-value="year" class="selected" data>Chronological</a></li>
      <li><a href="#sortBy=title" data-option-value="title">Alphabetical</a></li>
      <li><a href="#sortBy=program" data-option-value="program">Programmatic</a></li>
      <li><a href="#sortBy=scale" data-option-value="scale">Scale</a></li>
      <li><a href="#sortBy=status"  data-option-value="status">Status</a></li>
    </ul>

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

<div id="container" class="big-graph clearfix">
  
</div> <!-- #container -->


<script src="../{{ site.jquery_js }}"></script>
<script src="../{{ site.isotope_js }}"></script>
<script src="../js/make-big-graph-projects.js"></script> 
<script>

  // categoryRows custom layout mode
  $.extend( $.Isotope.prototype, {

    _bigGraphReset : function() {
      this.bigGraph = {
        x : 0,
        y : 0,
        height : 0,
        column: 0,
        row: 0,
        gutter: 0,
        currentCategory : null
      };
    },

    _bigGraphLayout : function( $elems ) {
      var instance = this,
          containerWidth = this.element.width(),
          bigGraphOpts = this.options.bigGraph,
          sortBy = this.options.sortBy,
          elemsGroup = {},
          props = this.bigGraph;

      // group item elements into categories based on their sorting data
      $elems.each( function() {
        var category = $.data( this, 'isotope-sort-data' )[ sortBy ];
        elemsGroup[ category ] = elemsGroup[ category ] || [];
        elemsGroup[ category ].push( this );
      });
  
      var group, groupName, groupMaxRows, groupLen,
          gutterWidth = bigGraphOpts.gutterWidth[ sortBy ],
          x, y;
      // for each group...
      for ( groupName in elemsGroup ) {
        group = elemsGroup[ groupName ];
        groupLen = group.length;
        // make groups look nice, by limiting rows, makes for blockier blocks
        groupMaxRows = groupLen / Math.ceil( groupLen / bigGraphOpts.maxRows );

        $.each( group, function( i, elem ) {
          x = props.column * bigGraphOpts.columnWidth + props.gutter * gutterWidth;
          y = (bigGraphOpts.maxRows - props.row - 1) * bigGraphOpts.rowHeight;
          instance._pushPosition( $(elem), x, y );
          
          if ( props.row >= groupMaxRows - 1 ) {
            // start a new column
            props.row = 0;
            props.column++;
          } else {
            props.row++;
          }
        });
        // start a new group
        if ( props.row > 0 ) {
          props.row = 0;
          props.column++;
        }
        props.gutter++;
      }
      props.gutter--;
      props.width = props.column * bigGraphOpts.columnWidth + props.gutter * gutterWidth;
    },

    _bigGraphGetContainerSize : function () {
      bigGraphOpts = this.options.bigGraph;
      this.bigGraph.column++;
      return {
        width: this.bigGraph.width,
        height: bigGraphOpts.maxRows * bigGraphOpts.rowHeight
      };
    },

    _bigGraphResizeChanged : function() {
      return false;
    }

  });


  $(function(){
    
    // -------- dynamically create items ---------------- //
    
    var i = 120,
        projects = [];
    
    while (i--) {
      projects.push( makeBigGraphProject() );
    }

    var $container = $('#container');
    
    $container.append( $( projects.join('') ) );
    
    // -------- isotope ---------------- //
    
    $container.isotope({
      itemSelector: '.project',
      layoutMode: 'bigGraph',
      bigGraph: {
        columnWidth: 45, // size of item
        rowHeight: 45, // size of item
        maxRows: 11, // max number of items vertically
        gutterWidth: { // width of gutter, needs to match getSortData names
          year: 0,
          scale: 0,
          program: 35,
          status: 80,
          title: 0
        }
      },
      sortBy: 'year',
      getSortData: {
        year: function( $elem ) {
          return $elem.attr('data-year');
        },
        scale: function( $elem ) {
          return $elem.attr('data-scale');
        },
        program: function( $elem ) {
          return $elem.attr('data-program');
        },
        status: function( $elem ) {
          return $elem.attr('data-status');
        },
        title: function( $elem ) {
          var chara = $elem.find('p').text()[0];
          return isNaN( parseInt( chara ) ) ? chara : '0';
        }
      }
    });
      
    {% include option-set-buttons.js %}

    
  });
</script>