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

interface XChartData
Base Hierarchy
::com::sun::star::uno::XInterface
 |
 +-XChartData
Description
manages the data of the chart.
See also
XChartDocument
Developers Guide
10.3.2 Charts - Working with 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
See also
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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