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

ISCIStrokePaint

@protocol ISCIStrokePaint <NSObject>

Defines a protocol which provides a way to draw lines, rects, ellipses or CGPathRef on CGContextRef.


                        
                        
                        -drawRect:withContext:

Paints a rectangle stroke on passed in CGContextRef.

Declaration

Objective-C

- (void)drawRect:(CGRect)rect withContext:(nonnull CGContextRef)context;

Swift

func draw(_ rect: CGRect, with context: CGContext)

Parameters

`rect`	The rectangle, specified in user space coordinates.
`context`	The graphics context to draw on.


                        
                        
                        -drawEllipseWithContext:inRect:

Paints an ellipse stroke that fits inside the specified rectangle in passed in.

Declaration

Objective-C

- (void)drawEllipseWithContext:(nonnull CGContextRef)context
                        inRect:(CGRect)rect;

Swift

func drawEllipse(with context: CGContext, in rect: CGRect)

Parameters

`context`	The graphics context to draw on.
`rect`	The rectangle that defines the area for the ellipse to fit in.


                        
                        
                        -drawPath:withContext:inRect:

Paints a CGPathRef stroke on passed in CGContextRef.

Declaration

Objective-C

- (void)drawPath:(nonnull CGPathRef)path
     withContext:(nonnull CGContextRef)context
          inRect:(CGRect)rect;

Swift

func draw(_ path: CGPath, with context: CGContext, in rect: CGRect)

Parameters

`path`	The `CGPathRef` instange to be drawn on the `context`
`context`	The graphics context to draw on.
`rect`	A rectangle defining the portion of the view to draw in.


                        
                        
                        -drawLines:count:withContext:inRect:

Paints lines strokes on passed in CGContextRef.

Note

Four points per line is used, e.g.: first line - [x0, y0, x1, y1]; second line - [x2, y2, x3, y3];

Declaration

Objective-C

- (void)drawLines:(nonnull const CGFloat *)coordinates
            count:(int)count
      withContext:(nonnull CGContextRef)context
           inRect:(CGRect)rect;

Swift

func drawLines(_ coordinates: UnsafePointer<CGFloat>, count: Int32, with context: CGContext, in rect: CGRect)

Parameters

`coordinates`	Array of points to draw `[x0, y0, x1, y1, x2, y2 ...]`.
`count`	The amount of points to draw.
`context`	The graphics context to draw on.
`rect`	A rectangle defining the portion of the view to draw in.