IPenDatasource

All Known Subinterfaces:

IHistogramDatasource

All Known Implementing Classes:

AbstractCalculatedPenDatasource, AbstractFunctionPenDatasource, ConstantPenDatasource, HistogramQuery, LinearRegressionPenDatasource, MovingAveragePenDatasource, MultiplyPenDatasource, PenSQLQuery, RunningSumPenDatasource, SpcPenDatasource, SumDiffPenDatasource, TagDensityHistogramSource, TagHistoryPenDatasource
```
public interface IPenDatasource
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addPen(PenData penData)`	Adds a pen to this datasource.
`Dataset`	`getDataset()`	The underlying dataset that drives this datasource
`int`	`getNumDatapoints()`	Return the number of datapoints currently loaded in this source
`void`	`initRefs(java.util.Map<java.lang.String,PenData> allPens)`	Gives the datasource a chance to install references to other pens
`boolean`	`isZoomTracking()`	True if this datasource should be restarted when the zoom level changes.
`void`	`shutdown()`	Shuts this datasoure down, if it has re-occurring activity.
`void`	`startup(PMIEasyChart chart)`	Start this datasouce up.

- Method Detail
  - addPen
```
void addPen(PenData penData)
```
    Adds a pen to this datasource. All pens will be added before startup() is called for the first time.
  - initRefs
```
void initRefs(java.util.Map<java.lang.String,PenData> allPens)
```
    Gives the datasource a chance to install references to other pens
  - startup
```
void startup(PMIEasyChart chart)
```
    Start this datasouce up. This should certainly mean that the data gets generated at least once, and possibly more based upon the chart's polling settings. May be called again after shutdown().
  - shutdown
```
void shutdown()
```
    Shuts this datasoure down, if it has re-occurring activity.
  - getNumDatapoints
```
int getNumDatapoints()
```
    Return the number of datapoints currently loaded in this source
  - getDataset
```
Dataset getDataset()
```
    The underlying dataset that drives this datasource
  - isZoomTracking
```
boolean isZoomTracking()
```
    True if this datasource should be restarted when the zoom level changes.