ChartDirector Ver 4.1 (C++ Edition)
CChartViewer.needUpdateChart
Usage
bool needUpdateChart();
Description
Determines if the current CVN_ViewPortChanged message requires chart update.
The message handler for a CVN_ViewPortChanged message can use this method to determine if chart update is necessary.
This method is only valid during handling of the CVN_ViewPortChanged message. Its behaviour is undefined at other times.
Arguments
None
Return Value
A boolean value that indicates if the CVN_ViewPortChanged message requires chart update.
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