Maintain Pan and Zoom State on Rebind

Normally, the Kendo UI Chart resets the axis range after the data source fetches new data. If users pan or zoom the Chart, they will see the initial viewport after the new data is loaded.

The example below demonstrates how to store and load the axis range. Changes are detected in the drag and zoom events. The axis range is restored in the databound event.

Example

    <button id="rebind">Rebind Chart</button>
    <div id="chart"></div>
    <script>
      // Sample data
      var data = [];
      for (var i = 0; i < 100; i++) {
        var val = Math.round(Math.random() * 10);
        data.push({
          category: "C" + i,
          value: val
        });
      }

      function createChart() {
        var axisMin = 0;
        var axisMax = 10;

        function updateRange(e) {
          var axis = e.sender.getAxis('axis')
          var range = axis.range()
          axisMin = range.min;
          axisMax = range.max;
        }

        function restoreRange(e) {
          e.sender.options.categoryAxis.min = axisMin;
          e.sender.options.categoryAxis.max = axisMax;
        }

        $("#chart").kendoChart({
          renderAs: "canvas",
          dataSource: {
            data: data
          },
          categoryAxis: {
            name: "axis",
            min: axisMin,
            max: axisMax,
            labels: {
              rotation: "auto"
            }
          },
          series: [{
            type: "column",
            field: "value",
            categoryField: "category"
          }],
          pannable: {
            lock: "y"
          },
          zoomable: {
            mousewheel: {
              lock: "y"
            },
            selection: {
              lock: "y"
            }
          },
          zoom: updateRange,
          drag: updateRange,
          dataBound: restoreRange
        });
      }

      $("#rebind").click(function() {
        $("#chart").data("kendoChart").dataSource.read();
      });

      $(document).ready(createChart);
    </script>

See Also

• Chart JavaScript API Reference
• Drawing API
• How to Aggregate Data in Pie Charts
• How to Draw on Scatter Plots Surface
• How to Expand Clickable Area of Points
• How to Fit PDF Exported Chart to Page
• How to Handle Right Click in Charts
• How to Place Text in the Center of Donut Charts
• How to Set Different Marker Types for Grouped Line Charts
• How to Use Linear Gradient As Background in Bars

For more runnable examples on Kendo UI Charts, browse the How To documentation folder.