StepAreaSeries

An object defining a series of the stepArea type.

Type: Object

StepAreaSeriesType ChartJS

For details on the stepArea series type, refer to the Step Area topic.

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argumentField

Specifies the data source field that provides arguments for series points.

Type: String
Default Value: 'arg'
Cannot be used in themes.

When defining series using the series configuration object, set the argumentField property to the corresponding field from the data source for each series individually. If the field that supplies arguments for data points is called in a similar way for several series, there is no need to set the field name for each series individually. Instead, set the field name for the argumentField property of the commonSeriesSettings configuration object at once.

axis

Specifies the name of the value axis that will be used to display the series.

Type: String
Default Value: undefined

This property is required when you implement a dxChart widget with multiple value axes. Set names for the value axes using their name property and assign these names to the series' axis property.

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border

Specifies border options for point labels.

Type: Object

Use this object to make the borders of point labels visible/invisible and set up border options such as color and width.

color

Specifies a series color.

Type: String
Default Value: undefined

Color is used to distinguish one chart series from another. However, there can be cases when it is more appropriate to display all chart series in one color. In this case, set the color property of the commonSeriesSettings configuration object. If required, you can override this property's common value in individual series objects.

hoverMode

Specifies the series elements to highlight when a series is hovered over.

Type: String
Default Value: 'nearestPoint'
Accepted Values: 'nearestPoint'|'includePoints' | 'excludePoints' | 'none'

The following values are available:

  • nearestPoint
    Changes the appearance of the hovered series together with the series point that is nearest to the current cursor location.
  • includePoints
    Changes the appearance of the hovered series together with all series points.
  • excludePoints
    Changes the appearance of the hovered series. The appearance of the series points is not changed.
  • none
    The appearance of the hovered series is not changed.

To set custom options for the 'hover' style (which is applied when a series is hovered over), use the hoverStyle configuration object. Define this object for an individual series (see series | hoverStyle), for all series of a particular type (see commonSeriesSettings | area/line/... | hoverStyle), or all series in the chart (see commonSeriesSettings | hoverStyle). In addition, you can set a custom hover style for the points of a series in a line, scatter or area chart. To do this, use the hoverStyle configuration object. Define this object for an individual series (series | point | hoverStyle), for all series of a particular type (commonSeriesSettings | area/line/... | point | hoverStyle), or all series in the Chart (see commonSeriesSettings | point | hoverStyle).

hoverStyle

An object defining configuration options for a hovered series.

Type: Object

To set a custom 'hover' style for all series at once, use the hoverStyle object within the commonSeriesSettings configuration object.

If you have several series of one type, you can set hover style options to the values specific to this type using the corresponding object (area, line or another) within the commonSeriesSettings configuration object. The values that are set within series-type-specific configuration objects override the corresponding common values.

In case you have to set a hover style option for an individual series, use the hoverStyle object within the series object of the series array. The values that are set individually override corresponding common values.

ignoreEmptyPoints

Specifies whether a chart ignores null data points or not.

Type: Boolean
Default Value: false

By default, if a data source has data points with a null argument or value, a chart may draw series with unnecessary gaps between points. To prevent this behavior from occurring, set the ignoreEmptyPoints option to true.

label

An object defining the label configuration options.

Type: Object

Each series point can be accompanied by a text label that represents data related to the point. These are called series point labels. Use the label object's properties to set label options for all chart series at once.

Specify the label object's properties within the commonSeriesSettings configuration object to set label options for all chart series at once.

If you have several series of a single type, you can set label options to the values specific to this series type using the corresponding object (area, line, etc.) within the commonSeriesSettings configuration object. The values that are set within series-type-specific configuration objects override the corresponding common values.

If you need to set a label option for an individual series, use the label object within the series object of the series array. The values that are set individually override the corresponding common values.

maxLabelCount

Specifies how many points are acceptable to be in a series to display all labels for these points. Otherwise, the labels will not be displayed.

Type: Number
Default Value: undefined

When there are several series in a chart and series with a large number of points, the point labels may overlap each other and make a chart difficult to read. In this instance, it is better to display the point labels depending on their quantity. To specify the maximum amount of the labels to be displayed, set the required number to the maxLabelCount field. If the number of the points on a series exceeded the number assigned to the maxLabelCount field, the point labels for this series will not be displayed.

opacity

Specifies opacity for a series.

Type: Number
Default Value: 0.5

pane

Specifies the pane that will be used to display a series.

Type: String
Default Value: 'default'

point

An object defining configuration options for points in line-, scatter- and area-like series.

Type: Object

To specify point options for all line-, scatter- and area-like series at once, use the properties of the point object defined within the commonSeriesSettings configuration object.

If you have several series of a single type, you can set point options to the values specific to this series type using the corresponding object (area, line, etc.) within the commonSeriesSettings configuration object. The values that are set within series-type-specific configuration objects override their corresponding common values.

If you need to set a point option for an individual series, use the point object within the series object of the series array. The values that are set individually override their corresponding common values.

selectionMode

Specifies the series elements to highlight when the series is selected.

Type: String
Default Value: 'includePoints'
Accepted Values: 'includePoints' | 'excludePoints' | 'none'

The dxChart widget comes with an API that allows you to select a series or a particular point in code. Use the selectionMode property to specify which series elements to select when the series is selected:

  • includePoints
    Changes the appearance of the selected series along with all series points.
  • excludePoints
    Changes the appearance of the selected series. The appearance of the series points is not changed.
  • none
    The appearance of the selected series is not changed.

To set custom options for the 'selected' style (which is applied when a series is selected), use the selectionStyle configuration object. Define this object for an individual series (see series | selectionStyle), for all series of a particular type (see commonSeriesSettings | area/line/... | selectionStyle), or all series in the chart (see commonSeriesSettings | selectionStyle). In addition, you can set a custom selection style for points in a line, scatter or area series. To do this, use the selectionStyle configuration object. Define this object for an individual series (series | point | selectionStyle), for all series of a particular type (commonSeriesSettings | area/line/... | point | selectionStyle), or all series in the Chart (see commonSeriesSettings | point | selectionStyle).

selectionStyle

An object defining configuration options for a selected series.

Type: Object

The dxChart widget comes with API members that allow you to select a series in code. To set a custom 'selected' style for all series at once, use the selectionStyle object within the commonSeriesSettings configuration object.

If you have several series of one type, you can set selection style options to the values specific to this type using the corresponding object (area, line or another) within the commonSeriesSettings configuration object. The values that are set within series-type-specific configuration objects override the corresponding common values.

In case you have to set a selection style option for an individual series, use the selectionStyle object within the series object of the series array. The values that are set individually override corresponding common values.

showInLegend

Specifies whether or not to show the series in the chart's legend.

Type: Boolean
Default Value: true

tagField

Specifies the name of the data source field that provides data about a point.

Type: String
Default Value: 'tag'
Cannot be used in themes.

When setting a common data source via the dataSource property, you can pass information about a point. For this purpose, add a separate field to the data source in addition to the argument and value fields. To set the specified data to the point instance, set the series' tagField property to the name of the field with the information. In this instance, when clicking a point in the chart, you can access the data associated with this point using the point's instance.

When defining series using the series configuration object, set the tagField property to the corresponding field from the data source for each series individually. If the field that supplies data about points is called similarly in several series, there is no need to set its name for each series individually. Instead, set it for the tagField property of the commonSeriesSettings configuration object.

You can also associate data with a series instance. To learn how to do this, refer to the description of the tag property of the series configuration object.

valueErrorBar

Configures error bars.

Type: Object

Error bars are used on charts to indicate an error or an uncertainty in a reported measurement. They give a general idea of how precise a measurement is.

In dxChart, an error bar is a vertical bar with two marks at its edges. An error bar accompanies a series point. Error bars can be generated either from concrete or calculated values. To generate one error bar, two values, high and low, are needed. If the data source of your chart provides concrete high and low values, assign the required data source fields to the highValueField and lowValueField options.

Alternatively, you can calculate the high and low error bar values automatically. For this purpose, choose one of error bar types and specify the value to be used in calculation.

NOTE
Error bars are available for axes of a numeric type only.

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valueField

Specifies the data source field that provides values for series points.

Type: String
Default Value: 'val'
Cannot be used in themes.

When defining series using the series configuration object, set the valueField property for each series individually to the corresponding field from the data source. In case you use series templates, specify the valueField property of the commonSeriesSettings configuration object.

The valueField property is considered for the series whose data points are set by an argument and one corresponding value. However, there are series whose data points are set by an argument and two corresponding values (e.g., range series). To set data fields for these types of series, use the rangeValue1Field and rangeValue2Field properties of the series configuration object. In addition, there are financial series, which have four values per argument. To set data fields for these types of series, use the openValueField, highValueField, lowValueField and closeValueField properties of the series configuration object.

visible

Specifies the visibility of a series.

Type: Boolean
Default Value: true

When this option is set to false for a series, the series appears invisible. If you require all the series to appear so, assign the same value to the visible option within the commonSeriesSettings configuration object.

In addition, you can show/hide series at runtime. For this purpose, use the show() or hide() method of a particular series respectively.

NOTE
When the series is invisible, the marker of its legend item is faded.