Package org.zkoss.zul.event

## Interface ChartAreaListener

-     public interface ChartAreaListener

  Identifies area inside a chart that can be customized.
  Author:
    henrichen
  See Also:
    `Chart`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `void` | `onRender​(Area area, java.lang.Object data)` | Called when the chart is being cut into areas.

- - ### Method Detail

    - #### onRender

          void onRender​(Area area,
                        java.lang.Object data)
                 throws java.lang.Exception

      Called when the chart is being cut into areas. When this method is called, the area has been initiated with its default value already. Each time the chart is repainted, the area is new created.
      Parameters:
        `area` - the area that cutting a chart. Note: when this method is called, the area has been initiated with its default value already.
        `data` - generic data used to pass data from `ChartEngine`.
      Throws:
        `java.lang.Exception`