5.20203.748
wijmo.chart Class PieDataLabel Wijmo API Class

PieDataLabel Class

The point data label for FlexPie.

Heirarchy

Properties

border

border: boolean

Gets or sets a value indicating whether the data labels have borders.

connectingLine

connectingLine: boolean

Gets or sets a value indicating whether to draw lines that connect labels to the data points.

content

content: any

Gets or sets the content of data labels.

The content can be specified as a string or as a function that takes HitTestInfo object as a parameter.

When the label content is a string, it can contain any of the following parameters:

  • seriesName: Name of the series that contains the data point (FlexChart only).
  • pointIndex: Index of the data point.
  • value: Value of the data point.
  • x: x-value of the data point (FlexChart only).
  • y: y-value of the data point (FlexChart only).
  • name: Name of the data point.
  • propertyName: any property of data object.

The parameter must be enclosed in curly brackets, for example 'x={x}, y={y}'.

In the following example, we show the y value of the data point in the labels.

 // Create a chart and show y data in labels positioned above the data point.
 var chart = new FlexChart('#theChart');
 chart.initialize({
     itemsSource: data,
     bindingX: 'country',
     series: [
         { name: 'Sales', binding: 'sales' },
         { name: 'Expenses', binding: 'expenses' },
         { name: 'Downloads', binding: 'downloads' }],
 });
 chart.dataLabel.position = "Top";
 chart.dataLabel.content = "{country} {seriesName}:{y}";

The next example shows how to set data label content using a function.

 // Set the data label content
 chart.dataLabel.content = function (ht) {
   return ht.name + ":" + ht.value.toFixed();
 }

offset

offset: number

Gets or sets the offset from label to the data point.

position

Gets or sets the position of the data labels.

Methods

onRendering

Events

rendering

Occurs before the data label is rendered.