Configuration

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

See Also

adaptiveLayout

Specifies adaptive layout options.

Type:

Object

When adapting to small container size, the widget may hide its accessory elements, thus saving space for more valuable ones. The elements are being hidden in the following sequence.

  1. Title
  2. Export menu icon
  3. Legend
  4. Item labels (can be saved by setting the adaptiveLayout.keepLabels option to true)

To specify the widget's size small enough for the layout to begin adapting, use the height and width options of the adaptiveLayout object.

View Demo on JSFiddle

algorithm

Specifies the algorithm for building the funnel.

Type:

String

Default Value: 'dynamicSlope'
Accepted Values: 'dynamicSlope' | 'dynamicHeight'

Two algorithms are available:

  • "dynamicSlope"

    The each funnel item's form depends on the ratio between the current and the next item's value.

  • "dynamicHeight"

    The height of each funnel item is proportional to the item's value. This algorithm produces a pyramid which is upturned by default. You can return it to normal by assigning true to the inverted option. You can also transform the pyramid's peak into a funnel's neck using the neckHeight and neckWidth options.

See Also

argumentField

Specifies which data source field provides arguments for funnel items. The argument identifies a funnel item and represents it on the legend.

Type:

String

Default Value: 'arg'

colorField

Specifies which data source field provides colors for funnel items. If this field is absent, the palette provides the colors.

Type:

String

Default Value: 'color'

The colors must have one of the following formats:

See Also

dataSource

Specifies the widget's data origin.

Cannot be used in themes.

This option accepts one of the following:

  • Array of objects
    A simple JavaScript array containing a collection of plain objects.

  • URL
    A URL to JSON data or a service returning data in JSON format.

  • DataSource or its configuration object
    A DataSource is an object that provides an API for data processing. Learn more about it from the Data Layer and DataSource Examples guides.

    NOTE
    Turn the DataSource's pagination off to prevent data from partitioning.
See Also

elementAttr

Specifies the attributes to be attached to the widget's root element.

Type:

Object

Default Value: {}

You can configure this option in an ASP.NET MVC Control as follows:

Razor C#
Razor VB
@(Html.DevExtreme().WidgetName()
    .ElementAttr("class", "class-name")
    // ===== or =====
    .ElementAttr(new {
        @id = "elementId",
        @class = "class-name"
    })
    // ===== or =====
    .ElementAttr(new Dictionary<string, object>() {
        { "id", "elementId" },
        { "class", "class-name" }
    })

)
@(Html.DevExtreme().WidgetName() _
    .ElementAttr("class", "class-name")
    ' ===== or =====
    .ElementAttr(New With {
        .id = "elementId",
        .class = "class-name"
    })
    ' ===== or =====
    .ElementAttr(New Dictionary(Of String, Object) From {
        { "id", "elementId" },
        { "class", "class-name" }
    })
)

export

Configures the exporting and printing features.

Type:

Object

These features allow a user to export your widget into a document or print it. When exporting is enabled, the "Exporting/Printing" button appears in the widget. A click on it invokes a drop-down menu that lists exporting and printing commands. The following formats are supported for exporting into: PNG, PDF, JPEG, SVG and GIF.

NOTE
IE9 and Safari on Mac OS do not implement an API for saving files. Therefore, exporting in these browsers requires setting up a server-side proxy. For details, refer to the proxyUrl option description.
See Also

Watch Video

hoverEnabled

Specifies whether funnel items change their style when a user pauses on them.

Type:

Boolean

Default Value: true
See Also

inverted

Turns the funnel upside down.

Type:

Boolean

Default Value: false

item

Configures funnel items' appearance.

Type:

Object

label

Configures funnel item labels.

Type:

Object

legend

Configures the legend.

Type:

Object

The legend is a component that helps a user identify funnel items. The legend contains several items, one per funnel item, each consisting of a colored marker and text showing the funnel item's argument.

DevExtreme HTML5 Javacript Funnel Legend

You can make the legend visible by setting the legend.visible option to true.

loadingIndicator

Configures the loading indicator.

Type:

Object

When the widget visualizes local data, loading is instant. But when the widget is bound to a remote data source, loading may takes a considerable amount of time. To keep the viewer's attention, the widget can display a loading indicator.

DevExtreme HTML5 Charts LoadingIndicator

To activate the loading indicator, assign true to the loadingIndicator.show option. Once data is loaded, the loading indicator will be hidden automatically.

See Also

margin

Generates space around the widget.

Type:

Object

WidgetMargin DevExtreme ChartJS

neckHeight

Specifies the ratio between the height of the neck and that of the whole funnel. Accepts values from 0 to 1. Applies only if the algorithm is "dynamicHeight".

Type:

Number

Default Value: 0

neckWidth

Specifies the ratio between the width of the neck and that of the whole funnel. Accepts values from 0 to 1. Applies only if the algorithm is "dynamicHeight".

Type:

Number

Default Value: 0

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.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onDrawn

A handler for the drawn event. Executed when the widget has finished drawing itself.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null
Cannot be used in themes.

onExported

A handler for the exported event. Executed after data from the widget is exported.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onExporting

A handler for the exporting event. Executed before data from the widget is exported.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

fileName:

String

The name of the file to which the widget is about to be exported.

cancel:

Boolean

Allows you to prevent exporting.

format:

String

The resulting file format. One of PNG, PDF, JPEG, SVG and GIF.

Default Value: null

onFileSaving

A handler for the fileSaving event. Executed before a file with exported data is saved on the user's local storage.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

fileName:

String

The name of the file to be saved.

format:

String

The format of the file to be saved.
Possible Values: 'PNG' | 'PDF' | 'JPEG' | 'SVG' | 'GIF'

data:

BLOB

Exported data as a BLOB.

cancel:

Boolean

Allows you to prevent file saving.

Default Value: null

onHoverChanged

A handler for the hoverChanged event. Executed after a funnel item's hover state is changed in the UI or programmatically.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

The Item object.

Default Value: null
Cannot be used in themes.

onIncidentOccurred

A handler for the incidentOccurred event. Executed when an error or warning appears in the widget.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

target: any

Information on the occurred incident.

Default Value: null

When an error or warning appears, the widget notifies you by passing a message to the browser console. This message contains the ID of the incident, a brief description, and a link to the Errors and Warnings section where further information about this incident can be found. However, you can handle errors and warnings in the way that you require. To do this, implement a callback function performing the required actions and assign it to the onIncidentOccurred option. Within this function, you can use information about the incident that occurred. This information can be accessed from the target field of the object passed to the callback function as a parameter. This information includes the following.

  • id
    Contains the ID of the incident. The full list of IDs can be found in the Errors and Warnings section.
  • type
    Contains the type of the incident. This field equals "error" for errors or "warning" for warnings.
  • args
    Contains the argument of the incident's message. The content of this field varies greatly, depending on the incident. For example, it may contain the name of the data source field that was not specified correctly, or the name of the option that was not set properly.
  • text
    Contains the text passed to the browser console. This text includes the content of the args field, if there are any.
  • widget
    Contains the name of the widget that produced the error or warning.
  • version
    Contains the currently used version of the DevExtreme library.

onInitialized

A handler for the initialized event. Executed only once, after the widget is initialized.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

Default Value: null

You cannot access widget elements in this handler because it is executed before they are ready. Use the onDrawn handler instead.

onItemClick

A handler for the itemClick event. Executed when a user clicks a funnel item.

Type:

function

|

String

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

jQueryEvent:

jQuery.Event

The jQuery event that caused the handler execution. Deprecated in favor of the event field.

event:

Event (jQuery or dxEvent)

The event that caused the handler execution. It is a dxEvent or a jQuery.Event when you use jQuery.

The Item object.

Default Value: null
Cannot be used in themes.

The onItemClick event handler is often used to implement item selection as shown in the following code:

jQuery
JavaScript
$(function () {
    $("#funnelContainer").dxFunnel({
        // ...
        onItemClick: function (e) {
            e.item.select(!e.item.isSelected())
        }
    });
});
Angular
HTML
TypeScript
<dx-funnel ...
    (onItemClick)="selectItem($event)">
</dx-funnel>
import { DxFunnelModule } from 'devextreme-angular';
// ...
export class AppComponent {
    selectItem (e) {
        e.item.select(!e.item.isSelected())
    }
}
@NgModule({
    imports: [
        // ...
        DxFunnelModule
    ],
    // ...
})
See Also

onLegendClick

A handler for the legendClick event. Executed when a user clicks a legend item.

Type:

function

|

String

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

jQueryEvent:

jQuery.Event

The jQuery event that caused the handler execution. Deprecated in favor of the event field.

event:

Event (jQuery or dxEvent)

The event that caused the handler execution. It is a dxEvent or a jQuery.Event when you use jQuery.

The Item object.

Default Value: null
Cannot be used in themes.
See Also

onOptionChanged

A handler for the optionChanged event. Executed after an option of the widget is changed.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

name:

String

The option's short name.

fullName:

String

The option's full name.

value: any

The option's new value.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onSelectionChanged

A handler for the selectionChanged event. Executed after a funnel item's selection state is changed in the UI or programmatically.

Type:

function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container.

model:

Object

The model data. Available only if you use Knockout.

The Item object.

Default Value: null
Cannot be used in themes.

See onItemClick to learn how to implement selection.

See Also

palette

Sets the palette to be used for colorizing funnel items.

Type:

Array<String>

|

String

Default Value: 'Default'
Accepted Values: 'Default' | 'Soft Pastel' | 'Harmony Light' | 'Pastel' | 'Bright' | 'Soft' | 'Ocean' | 'Vintage' | 'Violet' | 'Carmine' | 'Dark Moon' | 'Soft Blue' | 'Dark Violet' | 'Green Mist'

This option accepts either the name of a predefined palette or an array of colors in one of the following formats.

If the funnel has more items than the palette has colors, the colors are repeated with slight modification.

When using the widget as an ASP.NET MVC Control, you can specify this option using the VizPalette enum. This enum accepts the following values: Default, SoftPastel, HarmonyLight, Pastel, Bright, Soft, Ocean, Vintage, Violet, Carmine, DarkMoon, SoftBlue, DarkViolet and GreenMist.

pathModified

Notifies the widget that it is embedded into an HTML page that uses a tag modifying the path.

Type:

Boolean

Default Value: false
Cannot be used in themes.

If you place the widget on a page that uses a tag modifying the path (<base>, <iframe>, etc.), some of the widget elements may get mixed up or disappear. To solve this problem, set the pathModified option to true.

See Also

redrawOnResize

Specifies whether to redraw the widget when the size of the parent browser window changes or a mobile device rotates.

Type:

Boolean

Default Value: true
Cannot be used in themes.

When this option is set to true, the widget will be redrawn automatically in case the size of its parent window changes.

NOTE
To redraw the widget after the size of its container has changed, call the render() method of the widget's instance.

rtlEnabled

Switches the widget to a right-to-left representation.

Type:

Boolean

Default Value: false
Cannot be used in themes.

When this option is set to true, the widget text flows from right to left, and the layout of elements is reversed. To switch the entire application/site to the right-to-left representation, assign true to the rtlEnabled field of the object passed to the DevExpress.config(config) method.

JavaScript
DevExpress.config({
    rtlEnabled: true
});

selectionMode

Specifies whether a single or multiple funnel items can be in the selected state at a time. Assigning "none" disables the selection feature.

Type:

String

Default Value: 'single'
Accepted Values: 'single' | 'multiple' | 'none'

See onItemClick to learn how to implement selection.

size

Specifies the widget's size in pixels.

Type:

Object

Default Value: undefined

The widget occupies its container's entire area by default. Use the size object to specify the widget's size if it should be different from that of its container. Assign 0 to size object's height and width options to hide the widget.

sortData

Specifies whether to sort funnel items.

Type:

Boolean

Default Value: true

true puts bigger values on the top, smaller on the bottom; false keeps the order specified in the data source.

See Also

theme

Sets the name of the theme the widget uses.

Type:

String

Default Value: 'generic.light'
Accepted Values: 'generic.light' | 'generic.dark' | 'generic.contrast' | 'generic.carmine' | 'generic.darkmoon' | 'generic.softblue' | 'generic.darkviolet' | 'generic.greenmist' | 'android5.light' | 'ios7.default'

A theme is a widget configuration that gives the widget a distinctive appearance. Use can use one of the predefined themes or create a custom one. Changing the option values in the widget's configuration object overrides the theme's corresponding values.

NOTE
The following themes were deprecated or renamed: 'desktop', 'desktop-dark', 'android', 'android-holo-light', 'ios', 'win8', 'win8-white', 'win8.white', 'win8.black'. In new applications, use themes listed in the accepted values.

When using the widget as an ASP.NET MVC Control, specify this option using the VizTheme enum. This enum accepts the following values: GenericLight, GenericDark, GenericContrast, GenericCarmine, GenericDarkMoon, GenericSoftBlue, GenericDarkViolet, GenericGreenMist, Android5Light, IOS7Default, Win10Black and Win10White.

title

Configures the widget's title.

Type:

Object

|

String

The widget's title is a short text that usually indicates what is visualized. If you need to specify the title's text only, assign it directly to the title option. Otherwise, set this option to an object with the text and other fields specified.

The title can be accompanied by a subtitle elaborating on the visualized subject using the title.subtitle object.

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.

Type:

Object

valueField

Specifies which data source field provides values for funnel items. The value defines a funnel item's area.

Type:

String

Default Value: 'val'