Package org.zkoss.zul.impl

## Interface ChartEngine

- All Known Implementing Classes:
    `JFreeChartEngine`

      public interface ChartEngine

  Chart engine is an engine that do the real chart rendering. This interface defines the chart engine for components like `Chart` use to get the value of each data and the size of the chart data.
  Author:
    henrichen
  See Also:
    `Chart`, `ChartModel`, `ChartAreaListener`

- - ### Method Summary

    All Methods Instance Methods Abstract Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `byte[]` | `drawChart​(java.lang.Object data)` | Draw the chart and render into image format as an byte array.

- - ### Method Detail

    - #### drawChart

          byte[] drawChart​(java.lang.Object data)

      Draw the chart and render into image format as an byte array.
      Parameters:
        `data` - the data used in drawing a chart; depends on implementation.