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A scroll chart is a scrollable chart which, instead of accommodating all data in the constrained space, uses the scrollbar to scroll to a specific data point. KoolChart supports the scroll function in the column chart, bar chart, line chart, area chart and combination chart.

The <ScrollableAxisRenderer> element tag is used to create a scrollable axis, which can be defined as a child node of the <verticalAxisRenderers> ( or <horizontalAxisRenderers> ) element tag.

The <CategoryLinearAxis> element tag must be defined to use the scroll function, and <CategoryAxis> does not support the scroll function.

This sample chart is to show how to create a combination chart with the horizontal scrollbar.

...
<Combination2DChart ... >
  ...
  <Column2DSet type="clustered" />  
    <series>
      <Column2DSeries yField="Data1" ... />
      <Column2DSeries yField="Data2" ... />
      <Column2DSeries yField="Data3" ... />
    </series>
  </Column2DSet>
  <Line2DSeries yField="Data1" ... />
  ...
  <horizontalAxis>
    <CategoryLinearAxis id="hAxis" categoryField="City"/>	
  </horizontalAxis>
  
  <horizontalAxisRenderers>
    <ScrollableAxisRenderer axis="{hAxis}" visibleItemSize="5"/>
  </horizontalAxisRenderers>
  ...
</Combination2DChart>
...

<CategoryLinearAxis>

categoryField The categoryField attribute determines which field in the Data Object will be used as the value of the category axis.

<ScrollableAxisRenderer>

axis The axis attribute determines which axis will be drawn. The valid value is the ID of <horizontalAxis> or <verticalAxis>.
visibleItemSize The visibleItemSize attribute determines how many items will be displayed in the chart.

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