examples/graph2d/19_labels.html

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  <title>Graph2d | Basic Example</title>

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<h2>Graph2d | Label Example</h2>
<div style="width:700px; font-size:14px; text-align: justify;">
  This example shows the how to add a label to each point in Graph2d. Each item can have a label object which contains the content and CSS class.In addition, xOffset and yOffset will adjust the location of the label relative to the point being labelled. 

  
  <br /><br />
  
</div>
<br />
<div id="visualization"></div>

<script type="text/javascript">

  var container = document.getElementById('visualization');
  var label1 = {
    content: "Label 1 (with offset)",
    xOffset: 20,
    yOffset: 20
  }

  var label2 = {
    content: "Label 2",
    className: "red"
  }
  
  var label3 = {
    content: "Label 3"
  }
  var items = [
    {group: 1, x: '2014-06-11', y: 10, label: label1},
    {group: 1, x: '2014-06-12', y: 25, label: label2},
    {group: 1, x: '2014-06-13', y: 30},
    {group: 1, x: '2014-06-14', y: 10},
    {group: 1, x: '2014-06-15', y: 15, label: label3},
    {group: 1, x: '2014-06-16', y: 30},
    
    {group: 2, x: '2014-06-17', y: 10, label:label1},
    {group: 2, x: '2014-06-18', y: 25, label:label2},
    {group: 2, x: '2014-06-19', y: 30},
    {group: 2, x: '2014-06-20', y: 10},
    {group: 2, x: '2014-06-21', y: 15, label: label3},
    {group: 2, x: '2014-06-22', y: 30},
    
    {group: 3, x: '2014-06-23', y: 10, label:label1},
    {group: 3, x: '2014-06-24', y: 25, label:label2},
    {group: 3, x: '2014-06-25', y: 30},
    {group: 3, x: '2014-06-26', y: 10},
    {group: 3, x: '2014-06-27', y: 15, label: label3},
    {group: 3, x: '2014-06-28', y: 30}
  ];

  var groups = new vis.DataSet();
  groups.add(
    {
      id: 1,
      content: "Only draw items with labels. Make the data point bigger and a square.",
      options: {
        drawPoints: function group1Renderer(item, group, grap2d) {
		  if (item.label == null) {
            return false;
          }
          return {
            style: 'square',
            size: 15
          };
      	}
      }
    }
  );
  
  groups.add(
    {
      id: 2,
      content: "Draw according to the Graph2d callback, but make it every datapoint square one.",
      options: {
          drawPoints: {
            style: 'square'
          }
      }
    }
  );
  
  groups.add(
    {
      id: 3,
      content: "I want to render datapoints with no labels. Screw the graph2d options. Except the style/size should be according to the graph2d option.",
      options: {
          drawPoints: function(item, group, grap2d) {
            return item.label == null;
          }
      }
    }
  );
  
  var dataset = new vis.DataSet(items);
  var options = {
    start: '2014-06-10',
    end: '2014-06-29',
    style: 'bar',
    drawPoints: {
      onRender: function(item, group, grap2d) {
        return item.label != null;
      },
      style: 'circle'
    }
    
  };
  
  var graph2d = new vis.Graph2d(container, dataset, groups, options);
  
</script>
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