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:: com :: sun :: star :: chart ::

interface XChartData
Description
manages the data of the chart.
See also
XChartDocument
Developers Guide
Charts - Data Access

Methods' Summary
addChartDataChangeEventListener allows a component supporting the XChartDataChangeEventListener interface to register as listener. The component will be notified with a ChartDataChangeEvent every time the chart's data changes.

 
removeChartDataChangeEventListener removes a previously registered listener.  
getNotANumber  
isNotANumber checks whether the value given is equal to the indicator value for a missing value.  
Methods' Details
addChartDataChangeEventListener
void
addChartDataChangeEventListener( [in] XChartDataChangeEventListener  aListener );

Description
allows a component supporting the XChartDataChangeEventListener interface to register as listener. The component will be notified with a ChartDataChangeEvent every time the chart's data changes.

Parameter aListener
the component that is to be added as listener
See also
XChartDataChangeEventListener, ChartDataChangeEvent
removeChartDataChangeEventListener
void
removeChartDataChangeEventListener( [in] XChartDataChangeEventListener  aListener );

Description
removes a previously registered listener.
Parameter aListener
the component that is to be removed
getNotANumber
double
getNotANumber();

Returns
the value which is to be used as an indicator for a missing value in the data.

In IEEE arithmetic format it is one of the NaN values, so there are no conflicts with existing numeric values.

isNotANumber
boolean
isNotANumber( [in] double  nNumber );

Description
checks whether the value given is equal to the indicator value for a missing value.

In IEEE arithmetic format it is one of the NaN values, so there are no conflicts with existing numeric values.

Always use this method to check, if a value is not a number. If you compare the value returned by XChartData::getNotANumber to another double value using the = operator, you may not get the desired result!

Returns
true if the number given is interpreted by the chart as a missing value.
Parameter nNumber
the number that you want to check for validity.
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