TreeMapLevels

The levels of TreeMap can be categorized into two types as,

  • FlatLevel
  • Hierarchical Level

Following customization options are available to customize the treemap level as per your requirements.

  • To specify the background color for the group, you can use groupBackground property.

  • To specify the border color for the group, you can use groupBorderColor property.

  • To maintain the border thickness for the group, you can use groupBorderThickness property.

  • You can specify the gaps between groups using groupGap property.

  • You can specify the padding using groupPadding property.

  • For specifying the header height, you can use headerHeight property.

  • You can customize the header template using headerTemplate property.

  • To specify the label position, you can use labelPosition property.

  • To specify the label template for treemap, you can use labelTemplate property.

  • You can specify the label visibility using labelVisibilityMode property.

  • You can control the label visibility using showLabels property.

  • For controlling text overflow, you can use textOverflow property.

Flat Level

GroupPath

You can use groupPath property for every flat level of the TreeMap control. It is a path to a field on the source object that serves as the “Group” for the level specified. You can group the data based on the groupPath in the TreeMap control. When the groupPath is not specified, then the items are not grouped and the data is displayed in the order specified in the dataSource.

GroupGap

You can use groupGap property to separate the items from every flat level and to differentiate the levels mentioned in the TreeMap control.

  • javascript
  • /// <reference path="../tsfiles/jquery.d.ts"></reference>
    /// <reference path="../tsfiles/ej.web.all.d.ts"></reference>
    
    module treeMapcomponent {
    
            $(function () {
    
               var treeMapSample = new ej.datavisualization.TreeMap($("#treeMap"), {
                    dataSource: population_data,
                    colorValuePath: "Growth",
                    weightValuePath: "Population",
                    levels: [
                         { groupPath: "Continent", groupGap: 5}              
                    ]
    
                });
            });
    
    }

    Try it: FlatLevel

    Hierarchical Level

    TreeMap Hierarchical level is used to define levels for hierarchical data collection that contains tree-structured data.

  • javascript
  • $(function ($) {
    
               var treeMapSample = new ej.datavisualization.TreeMap($("#treeMap"), {
                    dataSource: population_data,
                    weightValuePath: "Population",
                });
            });
    
            var population_data =  [
                {Asia:[
                {Region: "Southern Asia", Growth: 1.32, Population: 1749046000 },
                {Region: "Eastern Asia", Growth: 0.57, Population: 1620807000 },
                {Region: "South-Eastern Asia", Growth: 1.20, Population: 618793000 },
                {Region: "Western Asia", Growth: 1.98, Population: 245707000 },
                {Region: "Central Asia", Growth: 1.43, Population: 64370000 }
                ] } ,
                {America:[
                {Region: "South America", Growth: 1.06, Population: 406740000 },
                {Region: "Northern America", Growth: 0.85, Population: 355361000 },
                {Region: "Central America", Growth: 1.40, Population: 167387000 },
                ]},
                {Africa:[
                {Region: "Eastern Africa", Growth: 2.89, Population: 373202000 },
                {Region: "Western Africa", Growth: 2.78, Population: 331255000 },
                {Region: "Northern Africa", Growth: 1.70, Population: 210002000 },
                {Region: "Middle Africa", Growth: 2.79, Population: 135750000 },
                {Region: "Southern Africa", Growth: 0.91, Population: 60425000 }
                ]}
            ];

    Click here to view our online demo sample with Hierarchical levels.