iOS & macOS Charting Documentation - SciChart iOS & macOS Charts SDK v4.x

ISCIPolyLineAnnotation

@protocol ISCIPolyLineAnnotation <ISCITradingAnnotation>

Defines the interface for a polygon annotation. Extends ISCITradingAnnotation with a pixel-coordinate base point update method.


                        
                        
                        -updateBasePointAtIndex:xCoordinate:yCoordinate:

Updates the position of the point at the given index using raw pixel coordinates. The implementation is responsible for converting pixels back to data values.

Declaration

Objective-C

- (void)updateBasePointAtIndex:(NSInteger)index
                   xCoordinate:(CGFloat)xCoord
                   yCoordinate:(CGFloat)yCoord;

Swift

func updateBasePoint(at index: Int, xCoordinate xCoord: CGFloat, yCoordinate yCoord: CGFloat)

Parameters

`index`	The index of the point to update.
`xCoord`	The new x position in pixel (screen) coordinates.
`yCoord`	The new y position in pixel (screen) coordinates.