Configuration

This section describes properties that configure the contents, behavior and appearance of the Chart widget.

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. Axis titles
  5. Axis labels
  6. Point 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

See Also

adjustOnZoom

Specifies whether to adjust the value axis's visualRange when the argument axis is being zoomed or panned.

Type:

Boolean

Default Value: true

When a user zooms or pans the argument axis, the range of displayed series values changes accordingly. To display this entire range without unused space on the value axis, the value axis's visual range gets widened or narrowed.

Set this option to false if the visual range should be constant and equal to the series values' maximum range.

View Demo

See Also

animation

Specifies animation options.

Type:

Object

|

Boolean

The widget animate its elements at the beginning of its lifetime and when the data source changes.

argumentAxis

Configures the argument axis.

Type:

Object

DevExtreme HTML5 Charts Axis Axes

The argumentAxis object, which is described here, configures the argument axis individually. To specify common settings for all axes in a chart, use the commonAxisSettings object. Axis-specific settings override common settings.

barGroupPadding

Controls the padding and consequently the width of a group of bars with the same argument using relative units. Ignored if the barGroupWidth option is set.

Type:

Number

Default Value: 0.3
This member is exposed by the following entities:

This option accepts a value from 0 to 1 that specifies the correlation between the empty space on a bar group's sides and the group's width: 0 - the bar group occupies the whole allocated space; 1 - virtually hides the bar group creating a lot of empty space.

See Also

barGroupWidth

Specifies a fixed width for groups of bars with the same argument, measured in pixels. Takes precedence over the barGroupPadding option.

Type:

Number

Default Value: undefined
This member is exposed by the following entities:

barWidth

Deprecated

Use the barPadding option instead.

Controls the width of bars in the widget. Applies only to bar-like series and when the equalBarWidth option is true.

Type:

Number

This option accepts values from 0 to 1 excluding 0. The assigned value specifies the correlation between a bar and the empty space around it. A value close to 0 makes the bar very thin leaving a lot of space, and 1, conversely, makes the bar very thick leaving no space.

NOTE
When adapting to the small screen or container size, the widget may ignore this option.

commonAxisSettings

Defines common settings for both the argument and value axis in a chart.

Type:

Object

DevExtreme HTML5 Charts Axis Axes

The commonAxisSettings object, which is described here, specifies common settings for all axes in a chart. To configure a particular axis, use the argumentAxis or valueAxis object. Axis-specific settings override common settings.

commonPaneSettings

Defines common settings for all panes in a chart.

Type:

Object

A pane is a chart area containing series. If there are many series an a chart, they can be distributed between multiple panes.

DevExtreme HTML5 Charts GridLines

The commonPaneSettings object, which is described here, specifies common settings for all panes in the chart. To specify options of an individual pane, use the objects of the panes array. Individual settings override common settings.

commonSeriesSettings

Specifies settings common for all series in the chart.

Type:

Object

There are three ways to configure a series.

  • The commonSeriesSettings object
    Specifies settings for all series in a chart.

  • The commonSeriesSettings.%seriesType% (area, line, etc.) object
    Specifies settings for all series of the seriesType.

  • An object in the series array
    Specifies settings for an individual series.

NOTE
You can use these objects together, but note that individual settings override type-specific settings, which in their turn, override common settings.

containerBackgroundColor

Colors the background of the chart container.

Type:

String

Default Value: '#FFFFFF'

If the background of your page has a color different from white, assign this color to the containerBackgroundColor option to ensure that the widget will blend smoothly into your page. Certain widget elements, such as series points in the hovered state, will use this color when coordinating with the page.

See Also

crosshair

Configures the crosshair feature.

Type:

Object

Crosshair is a pointer represented by two mutually-crossing lines stretched over the entire chart plot. The crosshair helps a user identify the values of the series points precisely. When enabled, the crosshair follows the cursor and snaps to the nearest series point.

DevExtreme HTML5 Charts Crosshair

To enable the crosshair, set the crosshair.enabled option to true. Assign true to the crosshair.label.visible option as well to make the crosshair labels visible.

Settings specified in the crosshair object apply to both the crosshair lines. If you specify the same settings within the horizontalLine or verticalLine object, they will apply to the particular crosshair line only. Note that individual settings override common ones.

View Demo

customizeLabel

Customizes the appearance of an individual point label.

Type:

Function

Function parameters:
pointInfo:

Object

Information on the series point.

Return Value:

Point Label

The label's configuration.

All point labels in a chart are identical by default, but you can specify a unique appearance for individual labels using the customizeLabel function. This function should return an object with options that will be changed for a certain label. See the label object for information about all options available for changing.

The customizeLabel function accepts an object providing information about the series point that the label belongs to. This object contains the following fields.

Field Description
argument The argument of the series point.
value The value of the series point.
tag The tag of the series point.
series The series that includes the series point.
index The index of the series point in the points array.

In the range bar and range area series, the value field is replaced by the following fields.

Field Description
rangeValue1 The first value of the series point.
rangeValue2 The second value of the series point.

In the financial series (candlestick and stock), the value field is replaced by the following fields.

Field Description
openValue The open value of the series point.
closeValue The close value of the series point.
lowValue The low value of the series point.
highValue The high value of the series point.
reductionValue The reduction value of the series point.
NOTE
All fields listed in this description are also exposed by the this object.

View Demo

customizePoint

Customizes the appearance of an individual series point.

Type:

Function

Function parameters:
pointInfo:

Object

Information on the series point.

Return Value:

Point Configuration

The point's configuration.

By default, all series points in a chart are identical, but you can specify a unique appearance for individual points using the customizePoint function. This function should return an object with options that will be changed for a certain point. See the point object for information about all options available for changing.

NOTE
The hoverMode and selectionMode options cannot be changed using the customizePoint function, because they do not have anything to do with the appearance of series points.

The customizePoint function accepts an object providing information about the series point. This object contains the following fields.

Field Description
argument The argument of the series point.
value The value of the series point.
tag The tag of the series point.
seriesName The name of the series that includes the series point.
index The index of the series point in the points array.

In the range bar and range area series, the value field is replaced by the following fields.

Field Description
rangeValue1 The first value of the series point.
rangeValue2 The second value of the series point.

In the financial series (candlestick and stock), the value field is replaced by the following fields.

Field Description
openValue The open value of the series point.
closeValue The close value of the series point.
lowValue The low value of the series point.
highValue The high value of the series point.
reductionValue The reduction value of the series point.
NOTE
As an alternative to the function’s parameter you can use the this keyword.

View Demo

dataPrepareSettings

Processes data before visualizing it.

Type:

Object

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. See demo.

  • URL
    The URL of a JSON file or service that returns JSON data. See demo.

  • 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. See demo.

    NOTE
    Turn the DataSource's pagination off to prevent data from partitioning.
NOTE
Data field names should not contain the following characters: ., ,, :, [, and ]. Their presence may cause issues in the widget's operation.
See Also

defaultPane

Specifies which pane should be used by default.

Type:

String

Default Value: undefined
Cannot be used in themes.

This option accepts the name of a pane from the panes array. The default pane displays all series with unspecified pane property. If defaultPane is undefined, the last pane in the panes array becomes the default.

disabled

Specifies whether the widget responds to the user interaction.

Type:

Boolean

Default Value: false
Cannot be used in themes.

elementAttr

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

Type:

Object

Default Value: {}
jQuery
$(function(){
    $("#chartContainer").dxChart({
        // ...
        elementAttr: {
            id: "elementId",
            class: "class-name"
        }
    });
});
Angular
HTML
TypeScript
<dx-chart ...
    [elementAttr]="{ id: 'elementId', class: 'class-name' }">
</dx-chart>
import { DxChartModule } from "devextreme-angular";
// ...
export class AppComponent {
    // ...
}
@NgModule({
    imports: [
        // ...
        DxChartModule
    ],
    // ...
})
ASP.NET MVC Control
Razor C#
Razor VB
@(Html.DevExtreme().Chart()
    .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().Chart() _
    .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" }
    })
)

equalBarWidth

Deprecated

Use the ignoreEmptyPoints option instead.

Specifies whether all bars should have equal width, even if some values are missing from a series. Applies only to bar-like series.

Type:

Boolean

If a value in a series equals to zero or is undefined, the bar visualizing this value will not be displayed on the chart making an empty space. If you need to fill this space by extending the neighbouring bars, set the equalBarWidth option to false.

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
Safari on Mac OS does 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

legend

Specifies the options of a chart's legend.

Type:

Object

The Chart widget can include a legend - an explanatory component that helps you identify a series. Each series is represented by an item on a Legend. An item marker identifies the series color. An item label displays the series title. To set the required position for a legend and its items, to customize the font settings for item labels, and to specify the size of item markers, use the properties of the legend configuration object. To learn more on the legend and its options, refer to the Legend topic.

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

maxBubbleSize

Specifies a coefficient determining the diameter of the largest bubble.

Type:

Number

Default Value: 0.2
This member is exposed by the following entities:

When defining a bubble series, you are required to specify a size field. The largest size value will be represented on the chart by the largest bubble. Its visual diameter will be calculated by the following formula.

d = maxBubbleSize * min(height, width)

Normally, the height and width from this formula equal the size of the widget container. However, when several panes are used in the widget, the height and width equal the pane size.

minBubbleSize

Specifies the diameter of the smallest bubble measured in pixels.

Type:

Number

Default Value: 12
This member is exposed by the following entities:

When defining a bubble series, you are required to specify a size field. The smallest size value will be represented on the chart by the smallest bubble. To set its visual diameter, specify the minBubbleSize option.

negativesAsZeroes

Forces the widget to treat negative values as zeroes. Applies to stacked-like series only.

Oftentimes, series data contains negative values. Visualizing such data using stacked-like series may lead to unexpected results. To prevent situations of this kind, assign true to the negativesAsZeroes option, and the widget will count all negative values as zeroes.

onArgumentAxisClick

A function that is executed when a label on the argument axis is clicked or tapped.

Type:

Function

|

String

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

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.

argument:

Date

|

Number

|

String

The clicked label's value.

Default Value: null
Cannot be used in themes.

onDisposing

A function that is executed before the widget is disposed of.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onDone

A function that is executed when all series are ready.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null
Cannot be used in themes.

onDrawn

A function that is executed when the widget's rendering has finished.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null
Cannot be used in themes.

onExported

A function that is executed after the widget is exported.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onExporting

A function that is executed before the widget is exported.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

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 function that is executed before a file with exported widget is saved to the user's local storage.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

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

onIncidentOccurred

A function that is executed when an error or warning occurs.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

target: any

Information on the occurred incident.

Default Value: null

The widget notifies you of errors and warnings by passing messages to the browser console. Each message contains the incident's ID, a brief description, and a link to the Errors and Warnings section where further information about this incident can be found.

The onIncidentOccurred function allows you to handle errors and warnings the way you require. The object passed to it contains the target field. This field provides information about the occurred incident and contains the following properties:

  • id
    The incident's ID. The full list of IDs can be found in the Errors and Warnings section.
  • type
    The incident's type: "error" or "warning".
  • args
    The argument of the incident's message. Depends on the incident. For example, it may be the name of the data source field that was specified incorrectly, or the name of the option that was not set properly.
  • text
    The text passed to the browser's console. Includes the args content, if there is any.
  • widget
    The name of the widget that produced the error or warning.
  • version
    The used DevExtreme version.

onInitialized

A function that is executed only once, after the widget is initialized.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

Default Value: null

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

onLegendClick

A function that is executed when a legend item is clicked or tapped.

Type:

Function

|

String

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

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.

target:

Series

The series that corresponds to the clicked legend item; described in the Series section.

Default Value: null
Cannot be used in themes.
NOTE

The onSeriesClick function is executed after this function. The following code shows how to prevent this:

jQuery
JavaScript
$(function () {
    $("#chartContainer").dxChart({
        // ...
        onLegendClick: function (e) {
            e.event.cancel = true;
        }
    });
});
Angular
TypeScript
HTML
import { DxChartModule } from "devextreme-angular";
// ...
export class AppComponent {
    chart_onLegendClick (e) {
        e.event.cancel = true;
    }
}
@NgModule({
    imports: [
        // ...
        DxChartModule
    ],
    // ...
})
<dx-chart ...
    (onLegendClick)="chart_onLegendClick($event)">
</dx-chart>

View Demo

onOptionChanged

A function that is executed after a widget option is changed.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

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. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

Default Value: null

onPointClick

A function that is executed when a series point is clicked or tapped.

Type:

Function

|

String

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

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.

target:

Point

The clicked series point; described in the Point section.

Default Value: null
Cannot be used in themes.
NOTE

The onSeriesClick function is executed after this function. The following code shows how to prevent this:

jQuery
JavaScript
$(function () {
    $("#chartContainer").dxChart({
        // ...
        onPointClick: function (e) {
            e.event.cancel = true;
        }
    });
});
Angular
TypeScript
HTML
import { DxChartModule } from "devextreme-angular";
// ...
export class AppComponent {
    chart_onPointClick (e) {
        e.event.cancel = true;
    }
}
@NgModule({
    imports: [
        // ...
        DxChartModule
    ],
    // ...
})
<dx-chart ...
    (onPointClick)="chart_onPointClick($event)">
</dx-chart>

Bar Chart Demo

onPointHoverChanged

A function that is executed after the pointer enters or leaves a series point.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Object

The widget's container.

target:

Point

The series point whose hover state has been changed; described in the Point section.

Cannot be used in themes.

To identify whether the pointer has entered or left the series point, call the point's isHovered() method.

onPointSelectionChanged

A function that is executed when a series point is selected or selection is canceled.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Object

The widget's instance.

element:

Object

The widget's container.

target:

Point

The series point whose selection state has been changed; described in the Point section.

Cannot be used in themes.

To identify whether the selection has been applied or canceled, call the point's isSelected() method.

onSeriesClick

A function that is executed when a series is clicked or tapped.

Type:

Function

|

String

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

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.

target:

Series

The clicked series.

Default Value: null
Cannot be used in themes.
NOTE
This function is also executed when a series point or legend item is clicked or tapped. You can cancel the execution in the onPointClick and onLegendClick functions.

View Demo

onSeriesHoverChanged

A function that is executed after the pointer enters or leaves a series.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

target:

Series

The series whose hover state has been changed.

Default Value: null
Cannot be used in themes.

To identify whether the pointer has entered or left the series, call the series' isHovered() method.

onSeriesSelectionChanged

A function that is executed when a series is selected or selection is canceled.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

target:

Series

The series whose selection state has been changed.

Default Value: null
Cannot be used in themes.

To identify whether the selection has been applied or canceled, call the series' isSelected() method.

onTooltipHidden

A function that is executed when a tooltip becomes hidden.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

target:

Point

The series point whose tooltip is hidden; described in the Point section.

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

onTooltipShown

A function that is executed when a tooltip appears.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

target:

Point

The series point whose tooltip is shown; described in the Point section.

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

onZoomEnd

A function that is executed when zooming or panning ends.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

rangeStart:

Date

|

Number

The argument axis' start value after zooming or panning. Deprecated in favor of the range field.

rangeEnd:

Date

|

Number

The argument axis' end value after zooming or panning. Deprecated in favor of the range field.

axis:

Chart Axis

The zoomed/panned axis.

range:

Object

The visual range when zooming or panning ends.

previousRange:

Object

The visual range when zooming or panning starts.

cancel:

Boolean

Allows you to cancel zooming or panning.

Default Value: null
Cannot be used in themes.

onZoomStart

A function that is executed when zooming or panning begins.

Type:

Function

Function parameters:
e:

Object

Information about the event.

Object structure:
component:

Chart

The widget's instance.

element:

Element (jQuery or HTML)

The widget's container. It is an HTML Element or a jQuery Element when you use jQuery.

model:

Object

The model data. Available only if you use Knockout.

axis:

Chart Axis

The zoomed/panned axis.

range:

Object

The visual range when zooming or panning starts.

cancel:

Boolean

Allows you to cancel zooming or panning.

Default Value: null
Cannot be used in themes.

palette

Sets the palette to be used for colorizing series and their elements.

Type:

Array<String>

|

String

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

This option accepts either the name of a predefined palette or an array of colors. The array can include the following colors:

Use the VizPalette enum to specify this option when the widget is used as an ASP.NET MVC Control. This enum accepts the following values: Default, SoftPastel, HarmonyLight, Pastel, Bright, Soft, Ocean, Vintage, Violet, Carmine, DarkMoon, SoftBlue, DarkViolet, and GreenMist.

See Also

paletteExtensionMode

Specifies what to do with colors in the palette when their number is less than the number of series (in the Chart widget) or points in a series (in the PieChart widget).

Type:

String

Default Value: 'blend'
Accepted Values: 'alternate' | 'blend' | 'extrapolate'

The following variants are available:

  • "blend"
    Create a blend of two neighboring colors and insert it between these colors in the palette.

  • "alternate"
    Repeat the full set of palette colors, alternating their normal, lightened, and darkened shades in that order.

  • "extrapolate"
    Repeat the full set of palette colors, changing their shade gradually from dark to light.

Use the VizPaletteExtensionMode enum to specify this option when the widget is used as an ASP.NET MVC Control. This enum accepts the following values: Blend, Alternate, and Extrapolate.

panes

Declares a collection of panes.

Type:

Object

|

Array<Object>

Cannot be used in themes.

A pane is a chart area containing series. If there are many series an a chart, they can be distributed between multiple panes.

DevExtreme HTML5 Charts Panes

Each object in the panes array configures a single pane. If you have several panes, we recommend you to name each pane in order to be able to refer to them afterwards.

View Demo

See Also
  • commonPaneSettings - specifies common settings for all panes in a chart.
  • series.pane - binds a series to a pane.
  • defaultPane - specifies which pane must be used by default.

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

pointSelectionMode

Specifies whether a single point or multiple points can be selected in the chart.

Type:

String

Default Value: 'single'
Accepted Values: 'multiple' | 'single'

To set the points to highlight along with the selected point, set the series.point.selectionMode option.

To learn how to select a point, refer to the Selection Handling topic.

Use the ChartElementSelectionMode enum to specify this option when the widget is used as an ASP.NET MVC Control. This enum accepts the following values: Single and Multiple.

Multiple Point Selection Demo API - Select a Point Demo

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.

resolveLabelOverlapping

Specifies how the chart must behave when series point labels overlap.

Type:

String

Default Value: 'none'
Accepted Values: 'hide' | 'none' | 'stack'

Series point labels display series point values. If your chart contains several series with a large number of points in each, point labels may overlap. In this case, specify how the chart must resolve overlapping using the resolveLabelOverlapping option. To hide certain labels, set this option to 'hide'. Labels to be hidden will be determined automatically. If labels that overlap belong to series points that have the same argument, you can arrange these labels in a stack. For this purpose, set the resolveLabelOverlapping option to 'stack'.

Use the ChartResolveLabelOverlapping enum to specify this option when the widget is used as an ASP.NET MVC Control. This enum accepts the following values: None, Hide, and Stack.

rotated

Swaps the axes around making the value axis horizontal and the argument axis vertical.

Type:

Boolean

Default Value: false
See Also
  • commonAxisSettings.inverted - inverts the axes.

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
});

scrollBar

Specifies the settings of the scroll bar.

Type:

Object

The scroll bar allows a user to pan the chart. To use it, you need to enable zooming and panning in your chart.

By default, the scroll bar is hidden. To make it visible, set the visible field of the scrollBar object to true. Using other fields of this object you can adjust the scroll bar appearance settings, including color, width and opacity.

View Demo

scrollingMode

Deprecated

Use the zoomAndPan option instead.

Enables scrolling in your chart.

Type:

String

Default Value: 'none'
Accepted Values: 'all' | 'mouse' | 'none' | 'touch'

This option allows you to control the scrolling capability in your chart. By default, this capability is off. To make scrolling available on touch-enabled devices only, assign 'touch' to the scrollingMode option. In that case, a user will be able to scroll the chart using the flick gesture. If your chart is not supposed to be viewed on touch-enabled devices, but you still need scrolling to be enabled, assign 'mouse' to the scrollingMode option. In that case, a user will be able to scroll the chart by dragging. To enable scrolling for all devices, assign 'all' to the scrollingMode option.

Scrolling may also be performed using the scroll bar. To make it visible assign true to the visible option of the scrollBar object.

NOTE
In many cases, scrolling is useless without zooming, and vice versa. Hence, when enabling the scrolling capability in your chart, consider enabling the zooming capability as well.

Use the ChartPointerType enum to specify this option when the widget is used as an ASP.NET MVC Control. This enum accepts the following values: Mouse, Touch, All, and None.

View Demo

See Also
  • zoomStart - an event that fires when scrolling or zooming begins.
  • zoomEnd - an event that fires when scrolling or zooming ends.

series

Specifies options for Chart widget series.

Default Value: undefined
Cannot be used in themes.

A series represents a grouping of related data points. The most important characteristic of a series is its type, which determines a particular visual representation of data. You can find more details on each series type in the corresponding topics in the Series help section.

To define a single series, assign an object defining the series to the series configuration object. In the series' object, specify the series type, data source fields, the appearance of the series points and other options.

To show several series, specify series as an array of objects defining series. If you need to set similar values to properties of several series, use the commonSeriesSettings configuration object. It exposes the properties that can be specified for all series at once and for all series of a particular type at once. Note that the values specified for a series individually (in the series array) override the values that are specified for all series (in the commonSeriesSettings object).

NOTE
This option is necessary. If you do not need to specify any of the options within the series object (e.g., when you have specified them within the commonSeriesSettings object), assign at least an empty object to the series field.

seriesSelectionMode

Specifies whether a single series or multiple series can be selected in the chart.

Type:

String

Default Value: 'single'
Accepted Values: 'multiple' | 'single'

To set the series elements to highlight when a series is selected, set the series selectionMode option.

To learn how to select a point, refer to the Selection Handling topic.

Use the ChartElementSelectionMode enum to specify this option when the widget is used as an ASP.NET MVC Control. This enum accepts the following values: Single and Multiple.

View Demo

seriesTemplate

Defines options for the series template.

Type:

Object

Default Value: undefined
Cannot be used in themes.

In most cases, you can organize the array that is assigned to the chart's dataSource option in the following way.

[
    {arg: arg1Value, series1Value: val11, series2Value: val12, ...}
    {arg: arg2Value, series1Value: val21, series2Value: val22, ...}
    ...
    {arg: argNValue, series1Value: valN1, series2Value: valN2, ...}
]

Each object that is included in the array represents an argument value and the values of all series for this argument.

However, there are some scenarios in which you do not know exactly how many series will be added. In these cases, you will not be able to define the data source in the manner detailed above. Instead, define it in the following way.

[
    {seriesName: series1, arg: arg11Value, val: value11 }
    {seriesName: series1, arg: arg12Value, val: value12 }
    ...
    {seriesName: seriesM, arg: argM1Value, val: valueM1 }
    {seriesName: seriesM, arg: argM2Value, val: valueM2 }
    ...
]

If you define a data source in this manner, set the argument and value fields using the argumentField and valueField properties of the commonSeriesSettings configuration object (for all series at once). Then, define a template for the series using the seriesTemplate configuration object. Within this object, set the data source field that specifies the series name to the nameField option.

If you need to specify individual values for options of a particular series, assign a callback function to the customizeSeries option of the seriesTemplate object.

View Demo

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.

synchronizeMultiAxes

Indicates whether or not to synchronize value axes when they are displayed on a single pane.

Type:

Boolean

Default Value: true

When synchronized, the ticks (or grid lines) of all the value axes in a pane are located on the same line.

theme

Sets the name of the theme the widget uses.

Type:

String

Default Value: 'generic.light'
Accepted Values: 'generic.dark' | 'generic.light' | 'generic.contrast' | 'ios7.default' | 'generic.carmine' | 'generic.darkmoon' | 'generic.darkviolet' | 'generic.greenmist' | 'generic.softblue' | 'material.blue.light' | 'material.lime.light' | 'material.orange.light' | 'material.purple.light' | 'material.teal.light'

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: 'android5.light', 'win8.white', 'win8.black', 'win8.light', 'win8.dark', 'win10.white', 'win10.black', 'win10.light', 'win10.dark'. In new applications, use themes listed in the accepted values.

Use the VizTheme enum to specify this option when the widget is used as an ASP.NET MVC Control. This enum accepts the following values: GenericLight, GenericDark, GenericContrast, GenericCarmine, GenericDarkMoon, GenericSoftBlue, GenericDarkViolet, GenericGreenMist, IOS7Default, MaterialBlueLight, MaterialLimeLight, MaterialOrangeLight, MaterialPurpleLight, MaterialTealLight.

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.

Type:

Object

A tooltip is a miniature rectangle displaying values of a series point. A tooltip appears when the end-user hovers the cursor over a series point. You can enable/disable tooltips, change their appearance and format their text using fields of the tooltip configuration object.

useAggregation

Deprecated

Use the enabled option instead.

Specifies whether or not to filter the series points depending on their quantity.

Type:

Boolean

By default, a chart displays all series points. But there may be situations when displaying all the series points may affect chart performance. In this case, it is better to aggregate the series points rather than display all of them. For this purpose, set the useAggregation option to true. The aggregation is based on the median filter algorithm.

valueAxis

Configures the value axis.

Type:

Object

|

Array<Object>

DevExtreme HTML5 Charts Axis Axes

The valueAxis object, which is described here, configures the value axis individually. To specify common settings for all axes in a chart, use the commonAxisSettings object. Axis-specific settings override common settings.

View Demo

zoomAndPan

Configures zooming and panning.

Type:

Object

You can enable zooming and panning for the argument and value axes independently. Set the argumentAxis and valueAxis options to enable zooming, panning, or both for a specific axis.

Users can use the mouse and touch gestures to zoom and pan. The following table illustrates user interaction:

Device Zooming Gestures Panning Gestures
Touch-enabled Spread and pinch Vertical or horizontal drag
Mouse-equipped Mouse Wheel for the argument axis;
Shift + Mouse Wheel for the value axis
Vertical or horizontal drag

You can use the allowTouchGestures or allowMouseWheel option to disable touch or mouse support.

Users can also use the mouse to zoom the chart by selecting an area with the drag gesture. Refer the dragToZoom option for more information.

Zooming and panning are related to the visual/whole range concept. Refer to the Visual and Whole Ranges article for more information.

View Demo

See Also

zoomingMode

Deprecated

Use the zoomAndPan option instead.

Enables zooming in your chart.

Type:

String

Default Value: 'none'
Accepted Values: 'all' | 'mouse' | 'none' | 'touch'

This option allows you to control the zooming capability in your chart. By default, this capability is off. To make zooming available on touch-enabled devices only, assign 'touch' to the zoomingMode option. In that case, a user will be able to zoom in/out of the chart using the spread/pinch gesture. If your chart is not supposed to be viewed on touch-enabled devices, but you still need zooming to be enabled, assign 'mouse' to the zoomingMode option. In this case, a user will be able to zoom the chart by rolling the mouse wheel. To enable zooming for all devices, assign 'all' to the zoomingMode option.

NOTE
In many cases, zooming is useless without scrolling, and vice versa. Hence, when enabling the zooming capability in your chart, consider enabling the scrolling capability as well.

Use the ChartPointerType enum to specify this option when the widget is used as an ASP.NET MVC Control. This enum accepts the following values: Mouse, Touch, All, and None.

View Demo

See Also