Color mapping

27 Feb 20185 minutes to read

You can customize the colors of leaf nodes of the pivot tree map by using the color mapping support.

Color mapping is categorized into two different types as follows:

• Normal
• Range

You can color all the leaf nodes with different colors by setting the color value of the rangeColorMapping property.

Normal color mapping

You can customize the nodes based on number of leaf items using different color ranges. You can also define the color value range by using from and to properties.

The following code sample explains how to customize the pivot tree map appearance using normal mode (i.e., differentiate color based on the number of leaf items in each header).

HTML

<template>
  <div>
    <ej-pivot-tree-map id="pivotTreeMapColor" e-data-source.bind="pivotData" e-on-render-success.trigger="renderFieldList($event)">
    </ej-pivot-tree-map>
  </div>
  <!--Tooltip labels can be localized here-->
  <script id="tooltipTemplate" type="application/jsrender">
    <div style="background:White; color:black; font-size:12px; font-weight:normal; border: 1px solid #4D4D4D; white-space: nowrap;border-radius: 2px; margin-right: 25px; min-width: 110px;padding-right: 5px; padding-left: 5px; padding-bottom: 2px ;width: auto; height: auto;">
      <div>Measure(s) : </div><div>Row : </div><div>Column : </div><div>Value : </div>
    </div>
  </script>
  </template>

JS

export class BasicUse {
    renderFieldList(args) {
    let treemapTarget = $('#pivotTreeMapColorTreeMapContainer').data('ejTreeMap');
    treemapTarget.model.colorValuePath = '';
    treemapTarget.model.enableGradient = false;
    treemapTarget.model.showLegend = false;
    treemapTarget.model.legendSettings.leftLabel = '';
    treemapTarget.model.legendSettings.rightLabel = '';
    treemapTarget.model.rangeColorMapping = [];
    treemapTarget.model.colorValuePath = 'Index';
    treemapTarget.model.rangeColorMapping.push(
      { color: '#9de24f', from: '0', to: '0' },
      { color: '#a2e2fe', from: '1', to: '1' },
      { color: '#ffff66', from: '2', to: '2' },
      { color: '#FF0040', from: '3', to: '3' },
      { color: '#f6b53f', from: '4', to: '4' },
      { color: '#6FAAB0', from: '5', to: '5' },
      { color: '#C4C24A', from: '6', to: '6' }
    );
    treemapTarget.refresh();
  }
}

Range color mapping

You can customize the nodes based on its value and color ranges by using range color. You can also define the color value range by using from and to properties.

The following code sample explains how to customize the pivot tree map appearance by using range mode (i.e., differentiate color for leaf items based on values).

JS

renderFieldList(args) {
         treemapTarget = $('#PivotTreeMap1TreeMapContainer').data("ejTreeMap");
         treemapTarget.model.colorValuePath = "";
         treemapTarget.model.enableGradient = false;
         treemapTarget.model.showLegend = false;
         treemapTarget.model.legendSettings.leftLabel = "";
         treemapTarget.model.legendSettings.rightLabel = "";
         treemapTarget.model.rangeColorMapping = [];
	     treemapTarget.model.colorValuePath = "Value";
         treemapTarget.model.rangeColorMapping.push(
         { color: "#a2e2fe", from: "0", to: "10" },
         { color: "#9de24f", from: "11", to: "250" },
         { color: "#ffff66", from: "251", to: "1000" },
         { color: "#C4C24A", from: "1001", to: "3000" },
         { color: "#f6b53f", from: "3001", to: "5000" },
         { color: "#6FAAB0", from: "5001", to: "10000" },
         { color: "#FF0040", from: "10001", to: "20000" }
         )
	treemapTarget.refresh();
   }