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

ISCIResizingGrip

@protocol ISCIResizingGrip <NSObject>

Defines the protocol for Resizing Grip which is used to resize ISCIAnnotation instance.


                        
                        
                        -onDrawGripAt:inCGContext:

Draw this resizing grip at specified point.

Declaration

Objective-C

- (void)onDrawGripAt:(CGPoint)point inCGContext:(nonnull CGContextRef)context;

Swift

func onDraw(at point: CGPoint, in context: CGContext)

Parameters

`point`	The coordinates of point to draw in pixels.
`context`	The `CGContext` to draw resizing grip on.


                        
                        
                        -isHitAtPoint:andDrawnPoint:

Checks whether this reising grip is hit.

Declaration

Objective-C

- (BOOL)isHitAtPoint:(CGPoint)hitPoint andDrawnPoint:(CGPoint)drawnPoint;

Swift

func isHit(at hitPoint: CGPoint, andDrawnPoint drawnPoint: CGPoint) -> Bool

Parameters

`hitPoint`	The hit test point in pixels.
`drawnPoint`	The point where resizing grip was drawn.

Return Value

YES - if hit test point is within resizing grip, otherwise NO;


                        
                        
                        -onDrawCustomGripAt:imgGrip:isHorizontal:drawRect:

Draw this resizing custom grip at specified point.

Declaration

Objective-C

- (void)onDrawCustomGripAt:(CGContextRef _Nonnull)context
                   imgGrip:(UIImage *_Nonnull)imgGrip
              isHorizontal:(BOOL)isHorizontal
                  drawRect:(CGRect)drawRect;

Swift

func onDrawCustomGrip(at context: CGContext, imgGrip: UIImage, isHorizontal: Bool, draw drawRect: CGRect)

Parameters

`context`	The `CGContext` to draw resizing grip on.
`imgGrip`	The custom `UIImage` to draw.
`isHorizontal`	BOOL flag to determine chart is horizontal or vertical
`drawRect`	The `CGRect` to draw grip.


                        
                        
                        -customGripIsHitAtPoint:andDrawnFrame:

Checks whether this reising grip is hit.

Declaration

Objective-C

- (BOOL)customGripIsHitAtPoint:(CGPoint)hitPoint
                 andDrawnFrame:(CGRect)drawnFrame;

Swift

func customGripIsHit(at hitPoint: CGPoint, andDrawnFrame drawnFrame: CGRect) -> Bool

Parameters

`hitPoint`	The hit test point in pixels.
`drawnFrame`	The frame where resizing grip was drawn.

Return Value

YES - if hit test point is within resizing grip, otherwise NO;


                        
                        
                        -onDrawGripHelper:pointX1:pointX2:size:isHorizontal:

Draws the grip helper when the window gap is too small for standard grips.

Declaration

Objective-C

- (void)onDrawGripHelper:(CGContextRef _Nonnull)context
                 pointX1:(CGFloat)pointX1
                 pointX2:(CGFloat)pointX2
                    size:(CGSize)size
            isHorizontal:(BOOL)isHorizontal;

Swift

func onDrawHelper(_ context: CGContext, pointX1: CGFloat, pointX2: CGFloat, size: CGSize, isHorizontal: Bool)

Parameters

`context`	The `CGContext` to draw resizing grip on.
`pointX1`	The X1 coordinate of point to draw in pixels.
`pointX2`	The X2 coordinate of point to draw in pixels.
`size`	The size of the helper grip to draw in pixels.
`isHorizontal`	BOOL flag to determine chart is horizontal or vertical