JavaScript/jQuery PolarChart - tooltip

Type:

Tooltip

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.

argumentFormat

Formats the point argument before it is displayed in the tooltip. To format the point value, use the format property.

Type:

Format

Default Value: undefined

NOTE
DevExtreme UI components provide a wide choice of predefined formats. If you are, however, going to use custom formats, link the Globalize library to your project. Learn how to do this from topics in the Installation section.
See Also
  • format - provides a comprehensive overview of formatting capabilities.
  • Value Formatting - shows how to apply formatting to various UI component elements.

arrowLength

Specifies the length of a tooltip's arrow in pixels.

Type:

Number

Default Value: 10

border

Configures a tooltip's border.

Type:

Object

color

Colors all tooltips.

Type:

String

Default Value: '#ffffff'

This property supports the following colors:

This property sets one color for all tooltips. You can specify a particular tooltip's color in the tooltip.customizeTooltip function.

container

Specifies the container in which to draw tooltips. The default container is the HTML DOM <body> element.

Type:

String

|

HTMLElement | jQuery

Default Value: undefined

contentTemplate

Specifies a custom template for a tooltip.

Type:

template

Template Data:

Object

Information on the series point being pressed or hovered over.

Default Name: undefined

You can access the following pointInfo object fields:

Field name Description
originalValue The value of the represented point as it is set in the data source.
value The value of the represented point. Differs from the originalValue when the axis value type is specified explicitly. In this instance, the value field contains a value of the specified type.
valueText The value of the point being hovered over with applied formatting if the format property is specified
originalArgument The argument value of the represented point as it is set in the data source.
argument The argument value of the represented point. Differs from the originalArgument when the axis argument type differs from the argument type in the data source. In this instance, argument has a similar type as the argument axis.
argumentText The argument value of the represented point with applied formatting if the argumentFormat property is specified.
seriesName The series name of the point being hovered over.
point Information on the point being hovered over. For more information about the field and the point object's methods, refer to the Point topic.
points An array of points with the same argument as the point being hovered over. This field is accessible when the shared property of the tooltip is set to true.

cornerRadius

Makes all the tooltip's corners rounded.

Type:

Number

Default Value: 0, 4 (Material)

The following table demonstrates how the corner's curvature depends on the cornerRadius value:

cornerRadius Result
cornerRadius: 0 DevExtreme Chart: tooltip with cornerRadius set to 0
cornerRadius: 15 DevExtreme Chart: tooltip with cornerRadius set to 15
cornerRadius: 35 DevExtreme Chart: tooltip with cornerRadius set to 35

customizeTooltip

Allows you to change tooltip appearance.

Type:

Function

Function parameters:
pointInfo:

Object

Information on the series point being pressed or hovered over with the mouse pointer.

Return Value:

Object

The tooltip's text or markup and appearance settings.

Default Value: undefined
Cannot be used in themes.

This property should be assigned a function that returns an object with the following fields:

Field name Description
text The tooltip's text.
html The HTML markup displayed in a tooltip.
The PolarChart evaluates the markup. Make sure that it does not contain malicious code. Refer to the following help topic for more information: Potentially Vulnerable API - customizeTooltip.
To use external resources (for example, images) in the markup, specify the size of the area they occupy beforehand.
color The tooltip's color.
fontColor The color of the tooltip's text.
borderColor The color of the tooltip's border.

This function's parameter has the following fields:

Field name Description
originalValue The value of the represented point as it is set in the data source.
value The value of the represented point. Differs from the originalValue when the axis value type is specified explicitly. In this instance, the value field contains a value of the specified type.
valueText The value of the point being hovered over with applied formatting if the format property is specified
originalArgument The argument value of the represented point as it is set in the data source.
argument The argument value of the represented point. Differs from the originalArgument when the axis argument type differs from the argument type in the data source. In this instance, argument has a similar type as the argument axis.
argumentText The argument value of the represented point with applied formatting if the argumentFormat property is specified.
seriesName The series name of the point being hovered over.
point Information on the point being hovered over. To learn more about the field and methods of the point object, refer to the Point topic.
points An array of points with the same argument as the point being hovered over. This field is accessible when the shared property of the tooltip is set to true.
NOTE
As an alternative to the function’s parameter you can use the this keyword.
See Also

enabled

Enables tooltips.

Type:

Boolean

Default Value: false

font

Specifies tooltips' font properties.

Type:

Object

format

Formats a value before it is displayed it in a tooltip.

Type:

Format

Default Value: undefined

See the format section for information on accepted values.

See Also

interactive

Allows users to interact with the tooltip content.

Type:

Boolean

Default Value: false

opacity

Specifies tooltips' transparency.

Type:

Number

Default Value: undefined

This property accepts a value from 0 to 1, where 0 makes tooltips completely transparent, and 1 makes them opaque.

paddingLeftRight

Generates an empty space, measured in pixels, between a tooltip's left/right border and its text.

Type:

Number

Default Value: 18

DevExtreme HTML5 JavaScript Funnel Tooltips Left-Right Padding

paddingTopBottom

Generates an empty space, measured in pixels, between a tooltip's top/bottom border and its text.

Type:

Number

Default Value: 15

DevExtreme HTML5 JavaScript Funnel Tooltips Top-Bottom Padding

shadow

Configures a tooltip's shadow.

Type:

Object

shared

Specifies whether the tooltip is shared across all series points with the same argument.

Type:

Boolean

Default Value: false

This property can have one of the following values:

tooltip.shared Description
false The tooltip only displays information about a series point that is hovered over with the mouse pointer.
true The tooltip displays information about all series points with the same argument as the point that is hovered over. If this point is included in a stack, the tooltip only displays information about points in this stack and points that do not belong to any stack (if there are any).

View Demo

See Also

zIndex

Specifies a tooltip's z-index.

Type:

Number

Default Value: undefined

If the UI component's container has the CSS z-index property specified, and tooltips are displayed incorrectly, configure their z-index using this property.