Angular PolarChart API

The PolarChart is a widget that visualizes data in a polar coordinate system.

import { DxPolarChartModule } from "devextreme-angular"

The PolarChart widget visualizes data in a polar coordinate system. In this system, each point on a plane is determined by the distance from the center (the point's value) and the angle from a fixed direction (the point's argument). To understand how a chart is displayed in a polar coordinate system, imagine how it would be displayed in a rectangular coordinate system and then round off the argument axis in your mind.

DevExtreme HTML5 Charts DataVisualization DevExtreme HTML5 Charts PolarChart RadarChart DataVisualization

DevExtreme widgets are integrated with many popular libraries and frameworks. See the Installation section (for JavaScript libraries) or the Prerequisites and Installation section (for ASP.NET MVC framework) to find details on setting up DevExtreme with a particular library or framework.

The following code shows how to create the PolarChart widget using every supported library and framework. For more details on working with widgets in these libraries and frameworks, see the Widget Basics topic for jQuery, Angular, AngularJS, Knockout or ASP.NET MVC.

jQuery

JavaScript

HTML

var temperature = [
    { month: "January", day: 6, night: 2 },
    { month: "February", day: 7, night: 2 },
    { month: "March", day: 10, night: 3 },
    { month: "April", day: 14, night: 5 },
    { month: "May", day: 18, night: 8 },
    { month: "June", day: 21, night: 11 },
    { month: "July", day: 22, night: 13 },
    { month: "August", day: 22, night: 13 },
    { month: "September", day: 19, night: 11 },
    { month: "October", day: 15, night: 8 },
    { month: "November", day: 10, night: 5 },
    { month: "December", day: 7, night: 3 }
];
$(function() {
    $("#polarChart").dxPolarChart({
        dataSource: temperature,
        commonSeriesSettings: {     
            argumentField: "month",
            type: "scatter"
        },
        series: [
            { valueField: "day", name: "Day" }, 
            { valueField: "night", name: "Night" }
        ]
    });
});

<div id="polarChart"></div>

Angular

HTML

TypeScript

<dx-polar-chart [dataSource]="temperature">
    <dxo-common-series-settings
        argumentField="month"
        type="scatter">
    </dxo-common-series-settings>
    <dxi-series
        valueField="day"
        name="Day">
    </dxi-series>
    <dxi-series
        valueField="night"
        name="Night">
    </dxi-series>
</dx-polar-chart>

import { DxPolarChartModule } from 'devextreme-angular';
// ...
export class AppComponent {
    temperature = [
        { month: "January", day: 6, night: 2 },
        { month: "February", day: 7, night: 2 },
        { month: "March", day: 10, night: 3 }
    ];
}
@NgModule({
    imports: [
        // ...
        DxPolarChartModule
    ],
    // ...
})

AngularJS

HTML

JavaScript

<div ng-controller="DemoController">
    <div dx-polar-chart="{
        dataSource: temperature,
        commonSeriesSettings: {     
            argumentField: 'month',
            type: 'scatter'
        },
        series: [
            { valueField: 'day', name: 'Day' }, 
            { valueField: 'night', name: 'Night' }
        ]
    }"></div>
</div>

angular.module('DemoApp', ['dx'])
    .controller("DemoController", function ($scope) {
        $scope.temperature = [
            { month: "January", day: 6, night: 2 },
            { month: "February", day: 7, night: 2 },
            { month: "March", day: 10, night: 3 }
        ];
    });

Knockout

HTML

JavaScript

<div data-bind="dxPolarChart: {
    dataSource: temperature,
    commonSeriesSettings: {     
        argumentField: 'month',
        type: 'scatter'
    },
    series: [
        { valueField: 'day', name: 'Day' }, 
        { valueField: 'night', name: 'Night' }
    ]
}"></div>

var viewModel = {
    temperature: [
        { month: "January", day: 6, night: 2 },
        { month: "February", day: 7, night: 2 },
        { month: "March", day: 10, night: 3 }
    ]
};
ko.applyBindings(viewModel);

ASP.NET MVC Controls

Razor C#

Razor VB

@(Html.DevExtreme().PolarChart()
    .ID("polarChart")
    .DataSource(new[] {
        new { Month = "January", Day = 6, Night = 2 },
        new { Month = "February", Day = 7, Night = 2 },
        new { Month = "March", Day = 10, Night = 3 }
    })
    .CommonSeriesSettings(c => c
        .ArgumentField("Month")
        .Type(PolarChartSeriesType.Scatter)
    )
    .Series(series => {
        series.Add().ValueField("Day");
        series.Add().ValueField("Night");
    })
)

@(Html.DevExtreme().PolarChart() _
    .ID("polarChart") _
    .DataSource({
        New With { .Month = "January", .Day = 6, .Night = 2 },
        New With { .Month = "February", .Day = 7, .Night = 2 },
        New With { .Month = "March", .Day = 10, .Night = 3 }
    }) _
    .CommonSeriesSettings(Sub(c)
        c.ArgumentField("Month") _
            .Type(PolarChartSeriesType.Scatter)
    End Sub) _
    .Series(Sub(series)
        series.Add().ValueField("Day")
        series.Add().ValueField("Night")
    End Sub)
)

View Demo Watch Video

Configuration

An object defining configuration options for the PolarChart widget.

Name	Description
adaptiveLayout	Specifies adaptive layout options.
animation	Specifies animation options.
argumentAxis	Specifies argument axis options for the PolarChart widget.
barWidth	Specifies a common bar width as a percentage from 0 to 1.
commonAxisSettings	An object defining the configuration options that are common for all axes of the PolarChart widget.
commonSeriesSettings	An object defining the configuration options that are common for all series of the PolarChart widget.
containerBackgroundColor	Specifies the color of the parent page element.
customizeLabel	Customizes the appearance of an individual point label.
customizePoint	Customizes the appearance of an individual series point.
dataPrepareSettings	An object providing options for managing data from a data source.
dataSource	Specifies the widget's data origin.
elementAttr	Specifies the attributes to be attached to the widget's root element.
equalBarWidth	Specifies whether or not all bars in a series must have the same angle, or may have different angles if any points in other series are missing.
export	Configures the exporting and printing features.
legend	Specifies the options of a chart's legend.
loadingIndicator	Configures the loading indicator.
margin	Generates space around the widget.
negativesAsZeroes	Forces the widget to treat negative values as zeroes. Applies to stacked-like series only.
onArgumentAxisClick	A handler for the argumentAxisClick event.
onDisposing	A handler for the disposing event. Executed when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
onDone	A function that is executed when all series are ready.
onDrawn	A function that is executed when the widget's rendering has finished.
onExported	A handler for the exported event. Executed after data from the widget is exported.
onExporting	A handler for the exporting event. Executed before data from the widget is exported.
onFileSaving	A handler for the fileSaving event. Executed before a file with exported data is saved on the user's local storage.
onIncidentOccurred	A handler for the incidentOccurred event. Executed when an error or warning appears in the widget.
onInitialized	A handler for the initialized event. Executed only once, after the widget is initialized.
onLegendClick	A handler for the legendClick event.
onOptionChanged	A handler for the optionChanged event. Executed after an option of the widget is changed.
onPointClick	A handler for the pointClick event.
onPointHoverChanged	A handler for the pointHoverChanged event.
onPointSelectionChanged	A handler for the pointSelectionChanged event.
onSeriesClick	A handler for the seriesClick event.
onSeriesHoverChanged	A handler for the seriesHoverChanged event.
onSeriesSelectionChanged	A handler for the seriesSelectionChanged event.
onTooltipHidden	A handler for the tooltipHidden event.
onTooltipShown	A handler for the tooltipShown event.
palette	Sets the name of the palette to be used in the chart. Alternatively, an array of colors can be set as a custom palette to be used within this chart.
pathModified	Notifies the widget that it is embedded into an HTML page that uses a tag modifying the path.
pointSelectionMode	Specifies whether a single point or multiple points can be selected in the chart.
redrawOnResize	Specifies whether to redraw the widget when the size of the parent browser window changes or a mobile device rotates.
resolveLabelOverlapping	Specifies how the chart must behave when series point labels overlap.
rtlEnabled	Switches the widget to a right-to-left representation.
series	Specifies options for PolarChart widget series.
seriesSelectionMode	Specifies whether a single series or multiple series can be selected in the chart.
seriesTemplate	Defines options for the series template.
size	Specifies the widget's size in pixels.
theme	Sets the name of the theme the widget uses.
title	Configures the widget's title.
tooltip	Configures tooltips.
useSpiderWeb	Indicates whether or not to display a "spider web".
valueAxis	Specifies value axis options for the PolarChart widget.

Methods

This section describes the methods that can be used in code to manipulate the Chart widget.

Name	Description
beginUpdate()	Prevents the widget from refreshing until the endUpdate() method is called.
clearSelection()	Deselects the chart's selected series. The series is displayed in an initial style.
dispose()	Disposes of all the resources allocated to the PolarChart instance.
element()	Gets the root widget element.
endUpdate()	Refreshes the widget after a call of the beginUpdate() method.
exportTo(fileName, format)	Exports the widget.
getAllSeries()	Gets all the series.
getDataSource()	Gets the DataSource instance.
getInstance(element)	Gets the instance of a widget found using its DOM node.
getSeriesByName(seriesName)	Gets a series with a specific name.
getSeriesByPos(seriesIndex)	Gets a series with a specific index.
getSize()	Gets the current widget size.
hideLoadingIndicator()	Hides the loading indicator.
hideTooltip()	Hides all widget tooltips.
instance()	Gets the widget's instance. Use it to access other methods of the widget.
off(eventName)	Detaches all event handlers from a single event.
off(eventName, eventHandler)	Detaches a particular event handler from a single event.
on(eventName, eventHandler)	Subscribes to an event.
on(events)	Subscribes to events.
option()	Gets all widget options.
option(optionName)	Gets the value of a single option.
option(optionName, optionValue)	Updates the value of a single option.
option(options)	Updates the values of several options.
print()	Opens the browser's print window.
render()	Redraws the widget.
render(renderOptions)	Redraws the widget.
showLoadingIndicator()	Shows the loading indicator.
svg()	Gets the widget's SVG markup.

Events

This section describes events fired by this widget.

Name	Description
argumentAxisClick	Fires when a user clicks a label on the argument axis.
disposing	Raised when the widget is removed from the DOM using the remove(), empty(), or html() jQuery methods only.
done	Raised when all series are ready.
drawn	Raised when the widget's rendering has finished.
exported	Raised after data from the widget is exported.
exporting	Raised before data from the widget is exported.
fileSaving	Raised before a file with exported data is saved on the user's local storage.
incidentOccurred	Raised when an error or warning appears in the widget.
initialized	Raised only once, after the widget is initialized.
legendClick	Fires when an item on the chart legend is clicked.
optionChanged	Raised after a widget option is changed.
pointClick	Fires when a user clicks a series point.
pointHoverChanged	Fires when the hover state of a series point has been changed.
pointSelectionChanged	Fires when the selection state of a series point has been changed.
seriesClick	Fires when a user clicks a series.
seriesHoverChanged	Fires when the hover state of a series has been changed.
seriesSelectionChanged	Fires when the selection state of a series has been changed.
tooltipHidden	Fires when a point's tooltip becomes hidden.
tooltipShown	Fires when a point's tooltip appears.

Series Types

This section lists objects that define options used to configure series of specific types.

Name	Description
AreaSeries	An object defining a series of the area type.
BarSeries	An object defining a series of the bar type.
LineSeries	An object defining a series of the line type.
ScatterSeries	An object defining a series of the scatter type.
StackedBarSeries	An object defining a series of the stackedBar type.

Type:

Object

Chart Elements

This section describes chart elements.

Angular PolarChart API

jQuery

Angular

AngularJS

Knockout

ASP.NET MVC Controls

See Also

Configuration

Methods

Events

See Also

Series Types

Chart Elements