JavaScript/jQuery Sparkline - tooltip

A tooltip is a miniature rectangle displaying widget data. The tooltip appears when the end-user hovers the cursor over the widget. You can enable/disable the tooltip, change its appearance and format its text using fields of the tooltip configuration object.

This option supports the following colors:

• Hexadecimal colors
• RGB colors
• RGBA colors
• Predefined/cross-browser color names
• Predefined SVG colors

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

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

cornerRadius	Result
cornerRadius: 0
cornerRadius: 15
cornerRadius: 35

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 access different types of values indicated by a sparkline. For this purpose, use the following fields of the this object.

• originalFirstValue
  Contains the first value of a sparkline as it is specified in a data source.
• firstValue
  Contains the first value of a sparkline with applied formatting if the format option is specified.
• originalLastValue
  Contains the last value of a sparkline as it is specified in a data source.
• lastValue
  Contains the last value of a sparkline with applied formatting if the format option is specified.
• originalMinValue
  Contains the minimum value of a sparkline as it is specified in a data source.
• minValue
  Contains the minimum value of a sparkline with applied formatting if the format option is specified.
• originalMaxValue
  Contains the maximum value of a sparkline as it is specified in a data source.
• maxValue
  Contains the maximum value of a sparkline with applied formatting if the format option is specified.

The following fields are available for a sparkline of the 'winloss' type only.

• originalThresholdValue
  Contains the threshold value of a winloss sparkline as it is assigned to the winlossThreshold option.
• thresholdValue
  Contains the threshold value of a winloss sparkline with applied formatting if the format option is specified.

To access the fields above, you can use the function's parameter as well as the this object.

To get general information on data formatting, refer to the Data Formatting topic.

See the format section for details on accepted values.

See Also

• Data Formatting

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

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