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

ISCINearestPointProvider

@protocol ISCINearestPointProvider <ISCIAttachable>

Defines the interface with method for search of nearest point.

See

-[ISCIRenderableSeries hitTest:at:].

See

-[ISCIRenderableSeries hitTest:at:withHitTestRadius:].

See

-[ISCIRenderableSeries verticalSliceHitTest:at:].




-setNearestPoint2D:x:y:hitTestRadius:

Performs search of nearest point in 2D.

Declaration

Objective-C

- (void)setNearestPoint2D:(nonnull SCIHitTestInfo *)hitTestResult
                        x:(float)x
                        y:(float)y
            hitTestRadius:(float)hitTestRadius;

Swift

func setNearestPoint2D(_ hitTestResult: SCIHitTestInfo, x: Float, y: Float, hitTestRadius: Float)

Parameters

`hitTestResult`	The `hit-test` info to update.
`x`	The `x coordinate` of `hit-test` in pixels.
`y`	The `y coordinate` of `hit-test` in pixels.
`hitTestRadius`	The `hit-test` radius in pixels.




-setNearestHorizontalPointResult:x:y:

Performs search of nearest point in x direction only.

Declaration

Objective-C

- (void)setNearestHorizontalPointResult:(nonnull SCIHitTestInfo *)hitTestResult
                                      x:(float)x
                                      y:(float)y;

Swift

func setNearestHorizontalPointResult(_ hitTestResult: SCIHitTestInfo, x: Float, y: Float)

Parameters

`hitTestResult`	The hit test info to update.
`x`	The `x coordinate` of `hit-test` in pixels.
`y`	The `y coordinate` of `hit-test` in pixel.