четвъртък, 16 януари 2014 г.

JavaScript Chart Empty Points

In this blog entry, we look at the ShieldUI empty point feature. 
The Shield UI charting component has full support for empty, or null points. Null points are commonly declared in the underlying datasource as follows:
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dataSeries: [
     {
         collectionAlias: "Weekly Report",
         seriesType: 'area',
         data: [233, 123, 345, 34, null, 56, 23]
     }
]
One can choose how this null value from the underlying datasource is interpreted. The value can either be skipped, resulting in a gap in the graph. Or, the two adjacent points can be joined together, creating the visual effect as though there is a valid data entry. This is handled by enabling the drawNullValues property.

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