CGContext (cmioslayer 3.4.0 API)

java.lang.Object
- crossmobile.ios.foundation.CFType
- - crossmobile.ios.coregraphics.CGContext

Direct Known Subclasses:

CGBitmapContext
```
public class CGContext
extends CFType
```
CGContext class defines an object that represents the graphics context of the application. It contains related parameters and methods for drawing objects of the application such as color filling, adding shadows and stroke lines.

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`void`	`addArc(double x, double y, double radius, double startAngle, double endAngle, int clockwise)` Adds an arc to the current path of this graphics context.
`void`	`addArcToPoint(double x1, double y1, double x2, double y2, double radius)` Adds an arc to the current path of this graphics context.
`void`	`addCurveToPoint(double cp1x, double cp1y, double cp2x, double cp2y, double x, double y)` Adds a cubic Bézier curve to the specified subpath of this graphics context.
`void`	`addLines(CGPoint... points)` Adds the specified, by the given points line, to the current path of this graphics context.
`void`	`addLineToPoint(double x, double y)` Adds a straight line segment between the specified points of this graphics context.
`void`	`addPath(CGPath path)` Add a new path to current path
`void`	`addQuadCurveToPoint(double cpx, double cpy, double x, double y)` Adds a quadratic Bézier curve to the specified path of this graphics context.
`void`	`addRect(CGRect rect)` Adds the specified rectangular path to the current path of this graphics context.
`void`	`addRects(CGRect... rects)` Adds the specified rectangular paths to the current path of this graphics context.
`void`	`beginPath()` Creates a new path in this graphics context.
`void`	`clip()` Clip graphics context using current path.
`void`	`clipToRect(CGRect frame)` Sets as clipping path the intersection of the current clipping path with the specified rectangle in this graphics context.
`void`	`closePath()` Closes and completes the current path.
`void`	`concatCTM(CGAffineTransform transform)` Changes user's coordinate system according to the specified transformation matrix.
`void`	`drawImage(CGRect rect, CGImage image)` Draws the specified image within the given rectangle of this graphics context.
`void`	`drawLinearGradient(CGGradient gradient, CGPoint startPoint, CGPoint endPoint, int CGGradientDrawingOptions)` Draws linear gradient for the specified area of this graphics context.
`void`	`drawPath(int CGPathDrawingMode)` Draws the current path using the specified drawing mode.
`void`	`drawRadialGradient(CGGradient gradient, CGPoint startCenter, double startRadius, CGPoint endCenter, double endRadius, int CGGradientDrawingOptions)` Draws a radial gradient for the specified area of defined by the given circles this graphics context.
`void`	`fillEllipseInRect(CGRect rect)` Paints the ellipse of the specified rectangular for this graphics context.
`void`	`fillPath()` Fills with color the current path using non-zero winding rule.
`void`	`fillRect(CGRect rect)` Paints the specified rectangular using the current preferred fill color of this graphics context.
`CGRect`	`getClipBoundingBox()` Returns the bounding box that encloses all the points of the current clipping path of this graphics context.
`CGAffineTransform`	`getCTM()` Retrieves the current transformation matrix of this graphics context.
`CGPoint`	`getTextPosition()` Returns the position at which the text should be drawn for this graphics context.
`void`	`moveToPoint(double x, double y)` Begins a new subpath at the specified point of this graphics context.
`void`	`restoreGState()` Restores the previous graphic state of this graphics context.
`void`	`rotateCTM(double theta)` Rotates user's coordinate system for this graphics context.
`void`	`saveGState()` Saves the current graphic state of this graphics context to the graphic state stack.
`void`	`scaleCTM(double sx, double sy)` Changes current scale of user's coordinate system of this graphics context.
`void`	`selectFont(String fontname, double size, int CGTextEncoding)` Deprecated.
`void`	`setAlpha(double alpha)` Sets the opacity for drawing in this graphics context.
`void`	`setFillColor(double[] components)` Sets the fill color of this graphics context defined by the specified components.
`void`	`setFillColorSpace(CGColorSpace colorSpace)` Sets the CGColorSpace fill color of this graphics context.
`void`	`setFillColorWithColor(CGColor color)` Sets CGColor fill color of this graphics context.
`void`	`setFont(CGFont font)` Sets the font to use for this graphics context.
`void`	`setFontSize(double size)` Set font size for this graphics context.
`void`	`setLineCap(int CGLineCap)` Sets the style of the ending points of lines of this graphics context.
`void`	`setLineJoin(int CGLineJoin)` Sets the style of joining stroked lines when they shape an angle of this graphics context.
`void`	`setLineWidth(double width)` Sets the width of stroked lines of this graphics context.
`void`	`setRGBFillColor(double red, double green, double blue, double alpha)` Sets the RGBA values for fill color of this graphics context.
`void`	`setRGBStrokeColor(double red, double green, double blue, double alpha)` Sets the RGBA values for the color of stroke lines of this graphics context.
`void`	`setShadowWithColor(CGSize offset, double blur, CGColor color)` Draws shadow with color for this graphics context.
`void`	`setShouldAntialias(boolean shouldAntialias)` Sets a Boolean that defines anti-aliasing status of this graphics context.
`void`	`setStrokeColor(double[] components)` Sets the stroke color of this graphics context defined by the specified components.
`void`	`setStrokeColorSpace(CGColorSpace colorSpace)` Sets the CGColorSpace stroke color of this graphics context.
`void`	`setStrokeColorWithColor(CGColor color)` Sets the stroke color of this graphics context.
`void`	`setTextDrawingMode(int CGTextDrawingMode)` Set drawing mode for this graphics context.
`void`	`setTextMatrix(CGAffineTransform t)` Apply the provided affine transformation to the text
`void`	`setTextPosition(double x, double y)` Sets location of at which the text should be drawn for this graphics context.
`void`	`showText(String text)` Displays the given String at the current text position of the text matrix.
`void`	`showTextAtPoint(double x, double y, String text)` Displays the given String at the specified position of this graphics context.
`void`	`strokeEllipseInRect(CGRect rect)` Strokes the ellipse of the specified rectangular for this graphics context.
`void`	`strokeLineSegments(CGPoint... points)` Strokes the line specified by the given points of this graphics context.
`void`	`strokePath()` Paints a line within the current path.
`void`	`strokeRect(CGRect rect)` Paints the specified rectangular using the current stroke color.
`void`	`translateCTM(double tx, double ty)` Changes user's origin within this graphics context.

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - concatCTM
```
public void concatCTM(CGAffineTransform transform)
```
    Changes user's coordinate system according to the specified transformation matrix.
    
    Parameters:
    
    transform - The transformation matrix.
    
    See Also:
    
    CGAffineTransform
  - getCTM
```
public CGAffineTransform getCTM()
```
    Retrieves the current transformation matrix of this graphics context.
    
    Returns:
    
    The current transformation matrix of this graphics context.
  - rotateCTM
```
public void rotateCTM(double theta)
```
    Rotates user's coordinate system for this graphics context.
    
    Parameters:
    
    theta - The rotation angle in radians.
  - scaleCTM
```
public void scaleCTM(double sx,
                     double sy)
```
    Changes current scale of user's coordinate system of this graphics context.
    
    Parameters:
    
    sx - The scale factor of the x axis.
    
    sy - The scale factor of the y axis.
  - translateCTM
```
public void translateCTM(double tx,
                         double ty)
```
    Changes user's origin within this graphics context.
    
    Parameters:
    
    tx - The x-value of the origin.
    
    ty - The y-value of the origin.
  - saveGState
```
public void saveGState()
```
    Saves the current graphic state of this graphics context to the graphic state stack.
  - restoreGState
```
public void restoreGState()
```
    Restores the previous graphic state of this graphics context.
  - setAlpha
```
public void setAlpha(double alpha)
```
    Sets the opacity for drawing in this graphics context.
    
    Parameters:
    
    alpha - The opacity of this graphic context.
  - drawImage
```
public void drawImage(CGRect rect,
                      CGImage image)
```
    Draws the specified image within the given rectangle of this graphics context.
    
    Parameters:
    
    rect - The rectangle within which the image is drawn.
    
    image - The image to be drawn.
  - setStrokeColor
```
public void setStrokeColor(double[] components)
```
    Sets the stroke color of this graphics context defined by the specified components.
    
    Parameters:
    
    components - The components that specify the stroke color of this graphics context.
  - setStrokeColorWithColor
```
public void setStrokeColorWithColor(CGColor color)
```
    Sets the stroke color of this graphics context.
    
    Parameters:
    
    color - The stroke color of this graphics context.
  - setStrokeColorSpace
```
public void setStrokeColorSpace(CGColorSpace colorSpace)
```
    Sets the CGColorSpace stroke color of this graphics context.
    
    Parameters:
    
    colorSpace - The CGColorSpace stroke color of this graphics context.
    
    See Also:
    
    CGColorSpace
  - setFillColor
```
public void setFillColor(double[] components)
```
    Sets the fill color of this graphics context defined by the specified components.
    
    Parameters:
    
    components - The components that specify the fill color of this graphics context.
  - setFillColorWithColor
```
public void setFillColorWithColor(CGColor color)
```
    Sets CGColor fill color of this graphics context.
    
    Parameters:
    
    color - The new color of the graphics context
    
    See Also:
    
    CGColor
  - setFillColorSpace
```
public void setFillColorSpace(CGColorSpace colorSpace)
```
    Sets the CGColorSpace fill color of this graphics context.
    
    Parameters:
    
    colorSpace - The CGColorSpace fill color.
    
    See Also:
    
    CGColorSpace
  - setRGBFillColor
```
public void setRGBFillColor(double red,
                            double green,
                            double blue,
                            double alpha)
```
    Sets the RGBA values for fill color of this graphics context.
    
    Parameters:
    
    red - The red value of the RGBA.
    
    green - The green value of the RGBA.
    
    blue - The blue value of the RGBA.
    
    alpha - The alpha value of the RGBA.
  - setRGBStrokeColor
```
public void setRGBStrokeColor(double red,
                              double green,
                              double blue,
                              double alpha)
```
    Sets the RGBA values for the color of stroke lines of this graphics context.
    
    Parameters:
    
    red - The red value of the RGBA.
    
    green - The green value of the RGBA.
    
    blue - The blue value of the RGBA.
    
    alpha - The alpha value of the RGBA.
  - setLineWidth
```
public void setLineWidth(double width)
```
    Sets the width of stroked lines of this graphics context.
    
    Parameters:
    
    width - The width of stroked lines.
  - setLineJoin
```
public void setLineJoin(int CGLineJoin)
```
    Sets the style of joining stroked lines when they shape an angle of this graphics context.
    
    Parameters:
    
    CGLineJoin - The style of joining stroked lines when they shape an angle.
    
    See Also:
    
    CGLineJoin
  - setLineCap
```
public void setLineCap(int CGLineCap)
```
    Sets the style of the ending points of lines of this graphics context.
    
    Parameters:
    
    CGLineCap - The style of ending points.
    
    See Also:
    
    CGLineCap
  - strokeRect
```
public void strokeRect(CGRect rect)
```
    Paints the specified rectangular using the current stroke color.
    
    Parameters:
    
    rect - The rectangular area to be painted.
  - fillRect
```
public void fillRect(CGRect rect)
```
    Paints the specified rectangular using the current preferred fill color of this graphics context.
    
    Parameters:
    
    rect - The rectangular area to be painted.
  - strokeEllipseInRect
```
public void strokeEllipseInRect(CGRect rect)
```
    Strokes the ellipse of the specified rectangular for this graphics context.
    
    Parameters:
    
    rect - The rectangular that specifies the ellipse.
  - fillEllipseInRect
```
public void fillEllipseInRect(CGRect rect)
```
    Paints the ellipse of the specified rectangular for this graphics context.
    
    Parameters:
    
    rect - The rectangular that specifies the ellipse.
  - strokeLineSegments
```
public void strokeLineSegments(CGPoint... points)
```
    Strokes the line specified by the given points of this graphics context.
    
    Parameters:
    
    points - The points that specify the line that should be stroke.
  - clipToRect
```
public void clipToRect(CGRect frame)
```
    Sets as clipping path the intersection of the current clipping path with the specified rectangle in this graphics context.
    
    Parameters:
    
    frame - The rectangle that changes the clipping path.
  - clip
```
public void clip()
```
    Clip graphics context using current path. The path will be closed if it is still open.
  - getClipBoundingBox
```
public CGRect getClipBoundingBox()
```
    Returns the bounding box that encloses all the points of the current clipping path of this graphics context.
    
    Returns:
    
    The bounding box of the current clipping path.
  - setFont
```
public void setFont(CGFont font)
```
    Sets the font to use for this graphics context.
    
    Parameters:
    
    font - The preferred font.
  - setFontSize
```
public void setFontSize(double size)
```
    Set font size for this graphics context.
    
    Parameters:
    
    size - The preferred font size.
  - selectFont
```
@Deprecated
public void selectFont(String fontname,
                                   double size,
                                   int CGTextEncoding)
```
    Deprecated.
    
    Sets the font and font size to use for this graphics context.
    
    Parameters:
    
    fontname - The preferred font.
    
    size - The size of the font.
    
    CGTextEncoding - The preferred text encoding.
    
    See Also:
    
    CGTextEncoding
  - setTextMatrix
```
public void setTextMatrix(CGAffineTransform t)
```
    Apply the provided affine transformation to the text
    
    Parameters:
    
    t - The affine transformation
  - showText
```
public void showText(String text)
```
    Displays the given String at the current text position of the text matrix.
    
    Parameters:
    
    text - The String to display.
  - showTextAtPoint
```
public void showTextAtPoint(double x,
                            double y,
                            String text)
```
    Displays the given String at the specified position of this graphics context.
    
    Parameters:
    
    x - The x-value of this position.
    
    y - The y-value of this position.
    
    text - The String to display.
  - getTextPosition
```
public CGPoint getTextPosition()
```
    Returns the position at which the text should be drawn for this graphics context.
    
    Returns:
    
    The position at which the text should be drawn for this graphics context.
  - setTextPosition
```
public void setTextPosition(double x,
                            double y)
```
    Sets location of at which the text should be drawn for this graphics context.
    
    Parameters:
    
    x - Horizontal location of text
    
    y - Vertical location of text
  - setTextDrawingMode
```
public void setTextDrawingMode(int CGTextDrawingMode)
```
    Set drawing mode for this graphics context.
    
    Parameters:
    
    CGTextDrawingMode - The drawing mode of this graphics context.
    
    See Also:
    
    CGTextDrawingMode
  - beginPath
```
public void beginPath()
```
    Creates a new path in this graphics context.
  - moveToPoint
```
public void moveToPoint(double x,
                        double y)
```
    Begins a new subpath at the specified point of this graphics context.
    
    Parameters:
    
    x - The x-value of the point.
    
    y - The y-value of the point.
  - addLineToPoint
```
public void addLineToPoint(double x,
                           double y)
```
    Adds a straight line segment between the specified points of this graphics context.
    
    Parameters:
    
    x - The x-value for the end of the line segment.
    
    y - The y-value for the end of the line segment.
  - addArc
```
public void addArc(double x,
                   double y,
                   double radius,
                   double startAngle,
                   double endAngle,
                   int clockwise)
```
    Adds an arc to the current path of this graphics context.
    
    Parameters:
    
    x - The x-value of the center of the arc.
    
    y - The y-value of the center of the arc.
    
    radius - The radius of the arc.
    
    startAngle - The starting angle of the arc expressed in radians.
    
    endAngle - The ending angle of the arc expressed in radians.
    
    clockwise - Specify 1 to create a clockwise arc or 0 to create a counterclockwise arc. Whether the arc is added clockwise or counterclockwise.
  - addArcToPoint
```
public void addArcToPoint(double x1,
                          double y1,
                          double x2,
                          double y2,
                          double radius)
```
    Adds an arc to the current path of this graphics context.
    
    Parameters:
    
    x1 - The x-value of the first tangent line.
    
    y1 - The y-value of the first tangent line.
    
    x2 - The y-value of the first tangent line.
    
    y2 - The x-value of the second tangent line.
    
    radius - The radius of the arc.
  - addCurveToPoint
```
public void addCurveToPoint(double cp1x,
                            double cp1y,
                            double cp2x,
                            double cp2y,
                            double x,
                            double y)
```
    Adds a cubic Bézier curve to the specified subpath of this graphics context.
    
    Parameters:
    
    cp1x - The x-value of first control point of the curve.
    
    cp1y - The y-value of first control point of the curve.
    
    cp2x - The x-value of the second control point of the curve.
    
    cp2y - The y-value of the second control point of the curve.
    
    x - The x end point of the curve.
    
    y - The y end point of the curve.
  - addQuadCurveToPoint
```
public void addQuadCurveToPoint(double cpx,
                                double cpy,
                                double x,
                                double y)
```
    Adds a quadratic Bézier curve to the specified path of this graphics context.
    
    Parameters:
    
    cpx - The y control point of the curve.
    
    cpy - The y control point of the curve.
    
    x - The x end point of the curve.
    
    y - The y end point of the curve.
  - addRect
```
public void addRect(CGRect rect)
```
    Adds the specified rectangular path to the current path of this graphics context.
    
    Parameters:
    
    rect - The rectangular path to add to the current path.
  - addRects
```
public void addRects(CGRect... rects)
```
    Adds the specified rectangular paths to the current path of this graphics context.
    
    Parameters:
    
    rects - The rectangular paths.
  - addLines
```
public void addLines(CGPoint... points)
```
    Adds the specified, by the given points line, to the current path of this graphics context.
    
    Parameters:
    
    points - The points of the line.
  - closePath
```
public void closePath()
```
    Closes and completes the current path.
  - drawPath
```
public void drawPath(int CGPathDrawingMode)
```
    Draws the current path using the specified drawing mode.
    
    Parameters:
    
    CGPathDrawingMode - A path drawing mode for the path.
    
    See Also:
    
    CGPathDrawingMode
  - fillPath
```
public void fillPath()
```
    Fills with color the current path using non-zero winding rule.
  - strokePath
```
public void strokePath()
```
    Paints a line within the current path.
  - addPath
```
public void addPath(CGPath path)
```
    Add a new path to current path
    
    Parameters:
    
    path - The path to add
  - drawLinearGradient
```
public void drawLinearGradient(CGGradient gradient,
                               CGPoint startPoint,
                               CGPoint endPoint,
                               int CGGradientDrawingOptions)
```
    Draws linear gradient for the specified area of this graphics context.
    
    Parameters:
    
    gradient - The CGGradient object.
    
    startPoint - Starting point's coordinates.
    
    endPoint - Ending point's coordinates.
    
    CGGradientDrawingOptions - The drawing locations of the gradients.
    
    See Also:
    
    CGGradientDrawingOptions
  - drawRadialGradient
```
public void drawRadialGradient(CGGradient gradient,
                               CGPoint startCenter,
                               double startRadius,
                               CGPoint endCenter,
                               double endRadius,
                               int CGGradientDrawingOptions)
```
    Draws a radial gradient for the specified area of defined by the given circles this graphics context.
    
    Parameters:
    
    gradient - The CGGradient object.
    
    startCenter - Starting circle's coordinates.
    
    startRadius - Starting circle's radius.
    
    endCenter - Ending circle's coordinates.
    
    endRadius - Ending circle's radius.
    
    CGGradientDrawingOptions - The drawing locations of the gradients.
    
    See Also:
    
    CGGradientDrawingOptions
  - setShadowWithColor
```
public void setShadowWithColor(CGSize offset,
                               double blur,
                               CGColor color)
```
    Draws shadow with color for this graphics context.
    
    Parameters:
    
    offset - The translation of the shadow offset.
    
    blur - The amount of blur.
    
    color - The color of the shadow.
  - setShouldAntialias
```
public void setShouldAntialias(boolean shouldAntialias)
```
    Sets a Boolean that defines anti-aliasing status of this graphics context.
    
    Parameters:
    
    shouldAntialias - TRUE to enable anti-aliasing which is the default.

Class CGContext

Method Summary

Methods inherited from class java.lang.Object

Method Detail

concatCTM

getCTM

rotateCTM

scaleCTM

translateCTM

saveGState

restoreGState

setAlpha

drawImage

setStrokeColor

setStrokeColorWithColor

setStrokeColorSpace

setFillColor

setFillColorWithColor

setFillColorSpace

setRGBFillColor

setRGBStrokeColor

setLineWidth

setLineJoin

setLineCap

strokeRect

fillRect

strokeEllipseInRect

fillEllipseInRect

strokeLineSegments

clipToRect

clip

getClipBoundingBox

setFont

setFontSize

selectFont

setTextMatrix

showText

showTextAtPoint

getTextPosition

setTextPosition

setTextDrawingMode

beginPath

moveToPoint

addLineToPoint

addArc

addArcToPoint

addCurveToPoint

addQuadCurveToPoint

addRect

addRects

addLines

closePath

drawPath

fillPath

strokePath

addPath

drawLinearGradient

drawRadialGradient

setShadowWithColor

setShouldAntialias