Angular Sankey API

The Sankey is a widget that visualizes the flow magnitude between value sets. The values being connected are called nodes; the connections - links. The higher the flow magnitude, the wider the link is.

import { DxSankeyModule } from "devextreme-angular"

Type: DxSankeyTypes.default

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 Sankey 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 data = [
    { source: "Brazil", target: "Portugal", weight: 5 },
    { source: "Brazil", target: "Spain", weight: 1 },
    { source: "Brazil", target: "England", weight: 1 },
    { source: "Canada", target: "Portugal", weight: 1 },
    { source: "Canada", target: "England", weight: 1 },
    { source: "Mexico", target: "Portugal", weight: 1 },
    { source: "Mexico", target: "Spain", weight: 5 }
];

$(function() {
    $("#sankey").dxSankey({
        dataSource: data
    });
});

<div id="sankey"></div>

Angular

HTML

TypeScript

<dx-sankey
    [dataSource]="data">
</dx-sankey>

import { DxSankeyModule } from "devextreme-angular";
// ...
export class AppComponent {
    data: Array<{ source: string, target: string, weight: number }> = [
        { source: "Brazil", target: "Portugal", weight: 5 },
        { source: "Brazil", target: "Spain", weight: 1 },
        { source: "Brazil", target: "England", weight: 1 },
        { source: "Canada", target: "Portugal", weight: 1 },
        { source: "Canada", target: "England", weight: 1 },
        { source: "Mexico", target: "Portugal", weight: 1 },
        { source: "Mexico", target: "Spain", weight: 5 }
    ];
}
@NgModule({
    imports: [
        // ...
        DxSankeyModule
    ],
    // ...
})

AngularJS

HTML

JavaScript

<div ng-controller="DemoController">
    <div dx-sankey="{
        dataSource: data
    }"></div>
</div>

angular.module("DemoApp", ["dx"])
    .controller("DemoController", function ($scope) {
        $scope.data = [
            { source: "Brazil", target: "Portugal", weight: 5 },
            { source: "Brazil", target: "Spain", weight: 1 },
            { source: "Brazil", target: "England", weight: 1 },
            { source: "Canada", target: "Portugal", weight: 1 },
            { source: "Canada", target: "England", weight: 1 },
            { source: "Mexico", target: "Portugal", weight: 1 },
            { source: "Mexico", target: "Spain", weight: 5 }
        ];
    });

Knockout

HTML

JavaScript

<div data-bind="dxSankey: {
    dataSource: data
}"></div>

var viewModel = {
    data: [
        { source: "Brazil", target: "Portugal", weight: 5 },
        { source: "Brazil", target: "Spain", weight: 1 },
        { source: "Brazil", target: "England", weight: 1 },
        { source: "Canada", target: "Portugal", weight: 1 },
        { source: "Canada", target: "England", weight: 1 },
        { source: "Mexico", target: "Portugal", weight: 1 },
        { source: "Mexico", target: "Spain", weight: 5 }
    ]
};

ko.applyBindings(viewModel);

ASP.NET MVC Controls

Razor C#

Razor VB

@(Html.DevExtreme().Sankey()
    .ID("Sankey")
    .DataSource(new object[] {
        new { source = "Brazil", target = "Portugal", weight = 5 },
        new { source = "Brazil", target = "Spain", weight = 1 },
        new { source = "Brazil", target = "England", weight = 1 },
        new { source = "Canada", target = "Portugal", weight = 1 },
        new { source = "Canada", target = "England", weight = 1 },
        new { source = "Mexico", target = "Portugal", weight = 1 },
        new { source = "Mexico", target = "Spain", weight = 5 }
    })
)

@(Html.DevExtreme().Sankey() _
    .ID("Sankey") _
    .DataSource({
        New With { .source = "Brazil", .target = "Portugal", .weight = 5 },
        New With { .source = "Brazil", .target = "Spain", .weight = 1 },
        New With { .source = "Brazil", .target = "England", .weight = 1 },
        New With { .source = "Canada", .target = "Portugal", .weight = 1 },
        New With { .source = "Canada", .target = "England", .weight = 1 },
        New With { .source = "Mexico", .target = "Portugal", .weight = 1 },
        New With { .source = "Mexico", .target = "Spain", .weight = 5 }
    })
)

View Demo

Configuration

This section describes options that configure the Sankey widget's contents, behavior and appearance.

Name	Description
adaptiveLayout	Specifies adaptive layout options.
alignment	Aligns node columns vertically.
dataSource	Binds the widget to data.
disabled	Specifies whether the widget responds to the user interaction.
elementAttr	Specifies the attributes to be attached to the widget's root element.
export	Configures the exporting and printing features.
hoverEnabled	Specifies whether nodes and links change their style when they are hovered over or pressed.
label	Configures sankey nodes' labels.
link	Configures sankey links' appearance.
loadingIndicator	Configures the loading indicator.
margin	Generates space around the widget.
node	Configures sankey nodes' appearance.
onDisposing	A function that is executed before the widget is disposed of.
onDrawn	A function that is executed when the widget's rendering has finished.
onExported	A function that is executed after the widget is exported.
onExporting	A function that is executed before the widget is exported.
onFileSaving	A function that is executed before a file with exported widget is saved to the user's local storage.
onIncidentOccurred	A function that is executed when an error or warning occurs.
onInitialized	A function used in JavaScript frameworks to save the widget instance.
onLinkClick	A function that is executed when a sankey link is clicked or tapped.
onLinkHoverChanged	A function that is executed after the pointer enters or leaves a sankey link.
onNodeClick	A function that is executed when a sankey node is clicked or tapped.
onNodeHoverChanged	A function that is executed after the pointer enters or leaves a sankey node.
onOptionChanged	A function that is executed after a widget option is changed.
palette	Sets the palette to be used to colorize sankey nodes.
paletteExtensionMode	Specifies how to extend the palette when it contains less colors than the number of sankey nodes.
pathModified	Notifies the widget that it is embedded into an HTML page that uses a tag modifying the path.
redrawOnResize	Specifies whether to redraw the widget when the size of the parent browser window changes or a mobile device rotates.
rtlEnabled	Switches the widget to a right-to-left representation.
size	Specifies the widget's size in pixels.
sortData	Specifies nodes' sorting order in their columns.
sourceField	Specifies which data source field provides links' source nodes.
targetField	Specifies which data source field provides links' target nodes.
theme	Sets the name of the theme the widget uses.
title	Configures the widget's title.
tooltip	Configures tooltips - small pop-up rectangles that display information about a data-visualizing widget element being pressed or hovered over with the mouse pointer.
weightField	Specifies which data source field provides links' weights.

Methods

This section describes the methods that control the Sankey widget.

Name	Description
beginUpdate()	Prevents the widget from refreshing until the endUpdate() method is called.
dispose()	Disposes of all the resources allocated to the Sankey instance.
element()	Gets the root widget element.
endUpdate()	Refreshes the widget after a call of the beginUpdate() method.
exportTo(fileName, format)	Exports the widget.
getAllLinks()	Gets all sankey links.
getAllNodes()	Gets all sankey nodes.
getDataSource()	Gets the DataSource instance.
getInstance(element)	Gets the instance of a widget found using its DOM node.
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.
showLoadingIndicator()	Shows the loading indicator.
svg()	Gets the widget's SVG markup.

Events

This section describes events that the Sankey widget raises.

Name	Description
disposing	Raised before the widget is disposed of.
drawn	Raised when the widget's rendering has finished.
exported	Raised after the widget is exported.
exporting	Raised before the widget is exported.
fileSaving	Raised before a file with exported widget is saved to the user's local storage.
incidentOccurred	Raised when an error or warning occurs.
initialized	Raised only once, after the widget is initialized.
linkClick	Raised when a sankey link is clicked or tapped.
linkHoverChanged	Raised after the pointer enters or leaves a sankey link.
nodeClick	Raised when a sankey node is clicked or tapped.
nodeHoverChanged	Raised after the pointer enters or leaves a sankey node.
optionChanged	Raised after a widget option is changed.

Node

A sankey node's structure.

You can use the getAllNodes() method and event handlers to access nodes, for example, onNodeClick.

Link

A sankey link's structure.

You can access links using the getAllLinks() method and within some event handlers, for example, onLinkClick.

Angular Sankey API

jQuery

Angular

AngularJS

Knockout

ASP.NET MVC Controls

See Also

Configuration

See Also

Methods

See Also

Events

See Also

Node

Link