ChartDirector 6.0 (C++ Edition)

CChartViewer.needUpdateImageMap


Usage

bool needUpdateImageMap();

Description

Determines if the current CVN_ViewPortChanged message requires image map update.

The message handler for a CVN_ViewPortChanged message can use this method to determine if image map 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 image map update.