Applies to
Declaration
function GetPoint(Point, Serie: integer; var X, Y: TReal): Boolean; public
Description
Returns true if point coordinates successfully calculated. If axis/serie expressions are used, you MUST define OnGetPoint handler with appropriate calculations, else this function just returns coordinates RData[XColumn], RData[YColumn] assuming that container holds TRealData items. For functional series, all calculations also must be performed in OnGetPoint. Again, you need this handler to plot data types other than TRealData ============ NOTICE: we MUST define X, Y parameters types in TGetPointEvent as extended, because otherwise Delphi designer reports error in DataWnd.pas (wrong event handler parameter list). Probably "extended" type remembered in DFM instead of TReal!!! So we cannot use TReal in published properties. Since our TReal MAY be double, we need a workaround...