ChartDirector 6.0 (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.