tooltip

Configures tooltips.

Type:

Object

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

View Demo

Show Example:
jQuery

In this example, several options of tooltips are changed. Hover over any bar to see its tooltip.


                                    

                                    

arrowLength

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

Type:

Number

Default Value: 10

Show Example:
jQuery

In this example, tooltips have a 5-pixel arrow.


                                    

                                    

border

Configures a tooltip's border.

Type:

Object

Show Example:
jQuery

In this example, several options of the tooltip's border are changed.


                                    

                                    

color

Colors all tooltips.

Type:

String

Default Value: '#ffffff'

This option supports the following colors:

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

Show Example:
jQuery

In this example, tooltips are painted in 'powderblue' using the color option.


                                    

                                    

container

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

Type:

String

|

DOM Node

|

jQuery

Default Value: undefined

customizeTooltip

Allows you to change tooltip appearance.

Type:

function

Function parameters:
scaleValue:

Object

Information on the bar value.

Object structure:
value:

Number

The raw value.

valueText:

String

The formatted value converted to a string.

index:

Number

A zero-based index of the hovered bar. The closer this bar is to the gauge's center, the greater its index.

Return Value:

Object

The tooltip's text or markup and color.

Default Value: undefined

This option should be assigned a function returning a specific object. The following fields can be specified in this object.

  • color
    Specifies the color of a tooltip.

  • text
    Specifies the text displayed by a tooltip.

  • html
    Specifies the HTML markup displayed by a tooltip.

    NOTE
    If you are going to use external resources (for example, images) in the markup, specify the size of the area they will occupy beforehand.
  • fontColor
    Specifies the color of the text displayed by a tooltip.

  • borderColor
    Specifies the color of the tooltip border.

When implementing a callback function for this option, you can use the value indicated by a bar. This value can be accessed using the object passed as the function's parameter or the this object.

To review text customization in greater detail, refer to the Customize Text topic.

Show Example:
jQuery

In this example, if a tooltip represents a value greater than 0, it is painted in 'beige'.


                                    

                                    

enabled

Enables tooltips.

Type:

Boolean

Default Value: false

Show Example:
jQuery

Use the check box under the gauge to enable/disable tooltips. Hover over a bar to see the changes.


                                    

                                    

font

Specifies tooltips' font options.

Type:

Object

Show Example:
jQuery

In this example, the font of the tooltip's text is changed.


                                    

                                    

format

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

Type:

Format

Default Value: undefined

See the format section for details on accepted values.

See Also
Show Example:
jQuery

In this example, a tooltip displays a bar value in the 'fixedPoint' format with a precision of 2. Hover over any bar to see its tooltip.


                                    

                                    

opacity

Specifies tooltips' transparency.

Type:

Number

Default Value: undefined

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

Show Example:
jQuery

In this example, tooltips are displayed with a 0.45 opacity.


                                    

                                    

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

precision

Deprecated

Use the tooltip.format.precision option instead.

Specifies the precision of formatted values in a tooltip.

Type:

Number

Default Value: undefined

shadow

Configures a tooltip's shadow.

Type:

Object

zIndex

Specifies a tooltip's z-index.

Type:

Number

Default Value: undefined

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