Ext.chart.series.Pie

Creates a Pie Chart. A Pie Chart is a useful visualization technique to display quantitative information for different categories that also have a meaning as a whole. As with all other series, the Pie Series must be appended in the *series* Chart array configuration. See the Chart documentation for more information. A typical configuration object for the pie series could be:

series: [{
        type: 'pie',
        field: 'data1',
        showInLegend: true,
        highlight: {
          segment: {
            margin: 20
          }
        },
        label: {
            field: 'name',
            display: 'rotate',
            contrast: true,
            font: '18px "Lucida Grande"'
        }
    }]

In this configuration we set `pie` as the type for the series, set an object with specific style properties for highlighting options (triggered when hovering elements). We also set true to `showInLegend` so all the pie slices can be represented by a legend item. We set `data1` as the value of the field to determine the angle span for each pie slice. We also set a label configuration object where we set the field name of the store field to be renderer as text for the label. The labels will also be displayed rotated. We set `contrast` to `true` to flip the color of the label if it is to similar to the background color. Finally, we set the font family and size through the `font` parameter.