Context2d (GWT Javadoc)

java.lang.Object
- com.google.gwt.core.client.JavaScriptObject
- - com.google.gwt.canvas.dom.client.Context2d

All Implemented Interfaces:

Context
```
public class Context2d
extends JavaScriptObject
implements Context
```
Rendering interface used to draw on a CanvasElement.

See Also:
W3C HTML 5 Specification

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`static class`	`Context2d.Composite` Enum for composite style.
`static class`	`Context2d.LineCap` Enum for line-cap style.
`static class`	`Context2d.LineJoin` Enum for line-join style.
`static class`	`Context2d.Repetition` Enum for the repetition values.
`static class`	`Context2d.TextAlign` Enum for text align style.
`static class`	`Context2d.TextBaseline` Enum for text baseline style.

Field Summary

Fields
Modifier and Type Field and Description

static java.lang.String CONTEXT_ID
Specifies the context id property used in creating a Context.

Fields
Modifier and Type	Field and Description
`static java.lang.String`	`CONTEXT_ID` Specifies the context id property used in creating a Context.

Constructor Summary

Constructors
Modifier Constructor and Description

protected Context2d()

Constructors
Modifier	Constructor and Description
`protected`	`Context2d()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`arc(double x, double y, double radius, double startAngle, double endAngle)` Draws an arc.
`void`	`arc(double x, double y, double radius, double startAngle, double endAngle, boolean anticlockwise)` Draws an arc.
`void`	`arcTo(double x1, double y1, double x2, double y2, double radius)` Adds an arc to the current subpath, connecting it to the current point with a line segment.
`void`	`beginPath()` Begins a new path.
`void`	`bezierCurveTo(double cp1x, double cp1y, double cp2x, double cp2y, double x, double y)` Draws a cubic Bézier curve from the current point to the point (x, y), with control points (cp1x, cp1y) and (cp2x, cp2y).
`void`	`clearRect(double x, double y, double w, double h)` Clears a rectangle.
`void`	`clip()` Creates a new clipping region from the current path.
`void`	`closePath()` Closes the current path.
`ImageData`	`createImageData(ImageData imagedata)` Creates an image data object of the same size as the given object.
`ImageData`	`createImageData(int w, int h)` Creates an image data object of the given size.
`CanvasGradient`	`createLinearGradient(double x0, double y0, double x1, double y1)` Creates a linear gradient.
`CanvasPattern`	`createPattern(CanvasElement image, Context2d.Repetition repetition)` Creates a pattern from another canvas.
`CanvasPattern`	`createPattern(CanvasElement image, java.lang.String repetition)` Creates a pattern from another canvas.
`CanvasPattern`	`createPattern(ImageElement image, Context2d.Repetition repetition)` Creates a pattern from an image.
`CanvasPattern`	`createPattern(ImageElement image, java.lang.String repetition)` Creates a pattern from an image.
`CanvasGradient`	`createRadialGradient(double x0, double y0, double r0, double x1, double y1, double r1)` Creates a radial gradient.
`void`	`drawImage(CanvasElement image, double dx, double dy)` Draws an image.
`void`	`drawImage(CanvasElement image, double dx, double dy, double dw, double dh)` Draws a scaled image.
`void`	`drawImage(CanvasElement image, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh)` Draws a scaled subset of an image.
`void`	`drawImage(ImageElement image, double dx, double dy)` Draws an image.
`void`	`drawImage(ImageElement image, double dx, double dy, double dw, double dh)` Draws a scaled image.
`void`	`drawImage(ImageElement image, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh)` Draws a scaled subset of an image.
`void`	`drawImage(VideoElement image, double dx, double dy)` Draws a video's current frame.
`void`	`drawImage(VideoElement image, double dx, double dy, double dw, double dh)` Draws a scaled video's current frame.
`void`	`drawImage(VideoElement image, double sx, double sy, double sw, double sh, double dx, double dy, double dw, double dh)` Draws a scaled subset of a video's current frame.
`void`	`fill()` Fills the current path.
`void`	`fillRect(double x, double y, double w, double h)` Fills a rectangle.
`void`	`fillText(java.lang.String text, double x, double y)` Draws filled text.
`void`	`fillText(java.lang.String text, double x, double y, double maxWidth)` Draws filled text squeezed into the given max width.
`CanvasElement`	`getCanvas()` Gets this context's canvas.
`FillStrokeStyle`	`getFillStyle()` Returns the context's fillStyle.
`java.lang.String`	`getFont()` Gets this context's font.
`double`	`getGlobalAlpha()` Gets the global alpha value.
`java.lang.String`	`getGlobalCompositeOperation()` Gets the global composite operation.
`ImageData`	`getImageData(double sx, double sy, double sw, double sh)` Returns an image data object for the screen area denoted by sx, sy, sw and sh.
`java.lang.String`	`getLineCap()` Gets the current line-cap style.
`java.lang.String`	`getLineJoin()` Gets the current line-join style.
`double`	`getLineWidth()` Gets the current line-width.
`double`	`getMiterLimit()` Gets the current miter-limit.
`double`	`getShadowBlur()` Gets the current shadow-blur.
`java.lang.String`	`getShadowColor()` Gets the current shadow color.
`double`	`getShadowOffsetX()` Gets the current x-shadow-offset.
`double`	`getShadowOffsetY()` Gets the current y-shadow-offset.
`FillStrokeStyle`	`getStrokeStyle()` Returns the context's strokeStyle.
`java.lang.String`	`getTextAlign()` Gets the current text align.
`java.lang.String`	`getTextBaseline()` Gets the current text baseline.
`boolean`	`isPointInPath(double x, double y)` Returns true if the given point is in the current path.
`void`	`lineTo(double x, double y)` Adds a line from the current point to the point (x, y) to the current path.
`TextMetrics`	`measureText(java.lang.String text)` Returns the metrics for the given text.
`void`	`moveTo(double x, double y)` Terminates the current path and sets the current path position to the point (x, y).
`void`	`putImageData(ImageData imagedata, double x, double y)` Draws the given image data at the given screen position.
`void`	`quadraticCurveTo(double cpx, double cpy, double x, double y)` Draws a quadratic Bézier curve from the current point to the point (x, y), with control point (cpx, cpy).
`void`	`rect(double x, double y, double w, double h)` Creates a new rectangular path.
`void`	`restore()` Restores the context's state.
`void`	`rotate(double angle)` Applies rotation to the current transform.
`void`	`save()` Saves the context's state.
`void`	`scale(double x, double y)` Applies scale to the current transform.
`void`	`setFillStyle(FillStrokeStyle fillStyle)` Sets the context's fillStyle.
`void`	`setFillStyle(java.lang.String fillStyleColor)` Convenience method to set the context's fillStyle to a `CssColor`, specified in String form.
`void`	`setFont(java.lang.String f)` Sets the font.
`void`	`setGlobalAlpha(double alpha)` Sets the global alpha value.
`void`	`setGlobalCompositeOperation(Context2d.Composite composite)` Sets the global composite operation.
`void`	`setGlobalCompositeOperation(java.lang.String globalCompositeOperation)` Sets the global composite operation.
`void`	`setLineCap(Context2d.LineCap lineCap)` Sets the line-cap style.
`void`	`setLineCap(java.lang.String lineCap)` Sets the line-cap style.
`void`	`setLineJoin(Context2d.LineJoin lineJoin)` Sets the line-join style.
`void`	`setLineJoin(java.lang.String lineJoin)` Sets the line-join style.
`void`	`setLineWidth(double lineWidth)` Sets the line-width.
`void`	`setMiterLimit(double miterLimit)` Sets the miter-limit.
`void`	`setShadowBlur(double shadowBlur)` Sets the shadow-blur.
`void`	`setShadowColor(java.lang.String shadowColor)` Sets the shadow-color.
`void`	`setShadowOffsetX(double shadowOffsetX)` Sets the x-shadow-offset.
`void`	`setShadowOffsetY(double shadowOffsetY)` Sets the y-shadow-offset.
`void`	`setStrokeStyle(FillStrokeStyle strokeStyle)` Sets the context's stroke style.
`void`	`setStrokeStyle(java.lang.String strokeStyleColor)` Convenience method to set the context's strokeStyle to a `CssColor`.
`void`	`setTextAlign(Context2d.TextAlign align)` Sets the text alignment.
`void`	`setTextAlign(java.lang.String align)` Sets the text alignment.
`void`	`setTextBaseline(Context2d.TextBaseline baseline)` Sets the text baseline.
`void`	`setTextBaseline(java.lang.String baseline)` Sets the text baseline.
`void`	`setTransform(double m11, double m12, double m21, double m22, double dx, double dy)` Sets the 2D transformation matrix.
`void`	`stroke()` Draws the current path with the current stroke style.
`void`	`strokeRect(double x, double y, double w, double h)` Draws the outline of a rectangle with the current stroke style.
`void`	`strokeText(java.lang.String text, double x, double y)` Draws the text outline.
`void`	`strokeText(java.lang.String text, double x, double y, double maxWidth)` Draws the text outline, squeezing the text into the given max width by compressing the font.
`void`	`transform(double m11, double m12, double m21, double m22, double dx, double dy)` Multiplies the current transform by the given matrix.
`void`	`translate(double x, double y)` Applies a translation to the current transform.

Methods inherited from class com.google.gwt.core.client.JavaScriptObject
cast, createArray, createArray, createFunction, createObject, equals, hashCode, toSource, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - CONTEXT_ID
```
public static final java.lang.String CONTEXT_ID
```
    Specifies the context id property used in creating a Context.
    
    See Also:
    Constant Field Values
- Constructor Detail
  - Context2d
```
protected Context2d()
```
- Method Detail
  - arc
```
public final void arc(double x,
       double y,
       double radius,
       double startAngle,
       double endAngle)
```
    Draws an arc. If a current subpath exists, a line segment is added from the current point to the starting point of the arc. If endAngle - startAngle is equal to or greater than 2 * Math.Pi, the arc is the whole circumference of the circle.
    
    Parameters:
    x - the x coordinate of the center of the arc
    y - the y coordinate of the center of the arc
    radius - the radius of the arc
    startAngle - the start angle, measured in radians clockwise from the positive x-axis
    endAngle - the end angle, measured in radians clockwise from the positive x-axis
  - arc
```
public final void arc(double x,
       double y,
       double radius,
       double startAngle,
       double endAngle,
       boolean anticlockwise)
```
    Draws an arc. If a current subpath exists, a line segment is added from the current point to the starting point of the arc. If anticlockwise is false and endAngle - startAngle is equal to or greater than 2 * Math.PI, or if anticlockwise is true and startAngle - endAngle is equal to or greater than 2 * Math.PI, then the arc is the whole circumference of the circle.
    
    Parameters:
    x - the x coordinate of the center of the arc
    y - the y coordinate of the center of the arc
    radius - the radius of the arc
    startAngle - the start angle, measured in radians clockwise from the positive x-axis
    endAngle - the end angle, measured in radians clockwise from the positive x-axis
    anticlockwise - if true, the arc is drawn in an anticlockwise direction
  - arcTo
```
public final void arcTo(double x1,
         double y1,
         double x2,
         double y2,
         double radius)
```
    Adds an arc to the current subpath, connecting it to the current point with a line segment.
    
    Parameters:
    x1 - the x coordinate of the starting point of the arc
    y1 - the y coordinate of the starting point of the arc
    x2 - the x coordinate of the ending point of the arc
    y2 - the y coordinate of the ending point of the arc
    radius - the radius of a circle containing the arc
  - beginPath
```
public final void beginPath()
```
    Begins a new path.
  - bezierCurveTo
```
public final void bezierCurveTo(double cp1x,
                 double cp1y,
                 double cp2x,
                 double cp2y,
                 double x,
                 double y)
```
    Draws a cubic Bézier curve from the current point to the point (x, y), with control points (cp1x, cp1y) and (cp2x, cp2y).
    
    Parameters:
    cp1x - the x coordinate of the first control point
    cp1y - the y coordinate of the first control point
    cp2x - the x coordinate of the second control point
    cp2y - the y coordinate of the second control point
    x - the x coordinate of the end point
    y - the y coordinate of the end point
  - clearRect
```
public final void clearRect(double x,
             double y,
             double w,
             double h)
```
    Clears a rectangle.
    
    Parameters:
    x - the x coordinate of the rectangle's upper-left corner
    y - the y coordinate of the rectangle's upper-left corner
    w - the width of the rectangle
    h - the height of the rectangle
  - clip
```
public final void clip()
```
    Creates a new clipping region from the current path.
  - closePath
```
public final void closePath()
```
    Closes the current path.
  - createImageData
```
public final ImageData createImageData(ImageData imagedata)
```
    Creates an image data object of the same size as the given object.
    
    Parameters:
    imagedata - an ImageData object
    
    Returns:
    a new ImageData object
  - createImageData
```
public final ImageData createImageData(int w,
                        int h)
```
    Creates an image data object of the given size.
    
    Parameters:
    w - the width of the image
    h - the height of the image
    
    Returns:
    an ImageData object
  - createLinearGradient
```
public final CanvasGradient createLinearGradient(double x0,
                                  double y0,
                                  double x1,
                                  double y1)
```
    Creates a linear gradient.
    
    Parameters:
    x0 - the x coordinate of the starting point of the gradient
    y0 - the y coordinate of the starting point of the gradient
    x1 - the x coordinate of the ending point of the gradient
    y1 - the y coordinate of the ending point of the gradient
    
    Returns:
    a CanvasGradient object
  - createPattern
```
public final CanvasPattern createPattern(CanvasElement image,
                          Context2d.Repetition repetition)
```
    Creates a pattern from another canvas.
    
    Parameters:
    image - an CanvasElement object
    repetition - a Context2d.Repetition object
    
    Returns:
    a CanvasPattern object
  - createPattern
```
public final CanvasPattern createPattern(CanvasElement image,
                          java.lang.String repetition)
```
    Creates a pattern from another canvas.
    
    Parameters:
    image - an CanvasElement object
    repetition - the repetition type as a String
    
    Returns:
    a CanvasPattern object
  - createPattern
```
public final CanvasPattern createPattern(ImageElement image,
                          Context2d.Repetition repetition)
```
    Creates a pattern from an image.
    
    Parameters:
    image - an ImageElement object
    repetition - a Context2d.Repetition object
    
    Returns:
    a CanvasPattern object
  - createPattern
```
public final CanvasPattern createPattern(ImageElement image,
                          java.lang.String repetition)
```
    Creates a pattern from an image.
    
    Parameters:
    image - an ImageElement object
    repetition - the repetition type as a String
    
    Returns:
    a CanvasPattern object
  - createRadialGradient
```
public final CanvasGradient createRadialGradient(double x0,
                                  double y0,
                                  double r0,
                                  double x1,
                                  double y1,
                                  double r1)
```
    Creates a radial gradient.
    
    Parameters:
    x0 - the x coordinate of the center of the start circle of the gradient
    y0 - the y coordinate of the center of the start circle of the gradient
    r0 - the radius of the start circle of the gradient
    x1 - the x coordinate of the center of the end circle of the gradient
    y1 - the y coordinate of the center of the end circle of the gradient
    r1 - the radius of the end circle of the gradient
    
    Returns:
    a CanvasGradient object
  - drawImage
```
public final void drawImage(CanvasElement image,
             double dx,
             double dy)
```
    Draws an image.
    
    Parameters:
    image - an CanvasElement object
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
  - drawImage
```
public final void drawImage(CanvasElement image,
             double dx,
             double dy,
             double dw,
             double dh)
```
    Draws a scaled image.
    
    Parameters:
    image - an CanvasElement object
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
    dw - the width of the destination rectangle
    dh - the height of the destination rectangle
  - drawImage
```
public final void drawImage(CanvasElement image,
             double sx,
             double sy,
             double sw,
             double sh,
             double dx,
             double dy,
             double dw,
             double dh)
```
    Draws a scaled subset of an image.
    
    Parameters:
    image - an CanvasElement object
    sx - the x coordinate of the upper-left corner of the source rectangle
    sy - the y coordinate of the upper-left corner of the source rectangle
    sw - the width of the source rectangle
    sh - the width of the source rectangle
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
    dw - the width of the destination rectangle
    dh - the height of the destination rectangle
  - drawImage
```
public final void drawImage(ImageElement image,
             double dx,
             double dy)
```
    Draws an image.
    
    Parameters:
    image - an ImageElement object
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
  - drawImage
```
public final void drawImage(ImageElement image,
             double dx,
             double dy,
             double dw,
             double dh)
```
    Draws a scaled image.
    
    Parameters:
    image - an ImageElement object
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
    dw - the width of the destination rectangle
    dh - the height of the destination rectangle
  - drawImage
```
public final void drawImage(ImageElement image,
             double sx,
             double sy,
             double sw,
             double sh,
             double dx,
             double dy,
             double dw,
             double dh)
```
    Draws a scaled subset of an image.
    
    Parameters:
    image - an ImageElement object
    sx - the x coordinate of the upper-left corner of the source rectangle
    sy - the y coordinate of the upper-left corner of the source rectangle
    sw - the width of the source rectangle
    sh - the width of the source rectangle
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
    dw - the width of the destination rectangle
    dh - the height of the destination rectangle
  - drawImage
```
public final void drawImage(VideoElement image,
             double dx,
             double dy)
```
    Draws a video's current frame.
    
    Parameters:
    image - a VideoElement object
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
  - drawImage
```
public final void drawImage(VideoElement image,
             double dx,
             double dy,
             double dw,
             double dh)
```
    Draws a scaled video's current frame.
    
    Parameters:
    image - a VideoElement object
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
    dw - the width of the destination rectangle
    dh - the height of the destination rectangle
  - drawImage
```
public final void drawImage(VideoElement image,
             double sx,
             double sy,
             double sw,
             double sh,
             double dx,
             double dy,
             double dw,
             double dh)
```
    Draws a scaled subset of a video's current frame.
    
    Parameters:
    image - a VideoElement object
    sx - the x coordinate of the upper-left corner of the source rectangle
    sy - the y coordinate of the upper-left corner of the source rectangle
    sw - the width of the source rectangle
    sh - the width of the source rectangle
    dx - the x coordinate of the upper-left corner of the destination rectangle
    dy - the y coordinate of the upper-left corner of the destination rectangle
    dw - the width of the destination rectangle
    dh - the height of the destination rectangle
  - fill
```
public final void fill()
```
    Fills the current path.
  - fillRect
```
public final void fillRect(double x,
            double y,
            double w,
            double h)
```
    Fills a rectangle.
    
    Parameters:
    x - the x coordinate of the rectangle's upper-left corner
    y - the y coordinate of the rectangle's upper-left corner
    w - the width of the rectangle
    h - the height of the rectangle
  - fillText
```
public final void fillText(java.lang.String text,
            double x,
            double y)
```
    Draws filled text.
    
    Parameters:
    text - the text as a String
    x - the x coordinate of the text position
    y - the y coordinate of the text position
  - fillText
```
public final void fillText(java.lang.String text,
            double x,
            double y,
            double maxWidth)
```
    Draws filled text squeezed into the given max width.
    
    Parameters:
    text - the text as a String
    x - the x coordinate of the text position
    y - the y coordinate of the text position
    maxWidth - the maximum width for the text
  - getCanvas
```
public final CanvasElement getCanvas()
```
    Gets this context's canvas.
    
    Returns:
    a CanvasElement object
  - getFillStyle
```
public final FillStrokeStyle getFillStyle()
```
    Returns the context's fillStyle. In dev mode, the returned object will be wrapped in a JavaScript array.
    
    Returns:
    a FillStrokeStyle object
    See Also:
    setFillStyle(FillStrokeStyle), setFillStyle(String), CssColor
  - getFont
```
public final java.lang.String getFont()
```
    Gets this context's font.
    
    Returns:
    the font name as a String
    See Also:
    setFont(String)
  - getGlobalAlpha
```
public final double getGlobalAlpha()
```
    Gets the global alpha value.
    
    Returns:
    the global alpha value as a double
    See Also:
    setGlobalAlpha(double)
  - getGlobalCompositeOperation
```
public final java.lang.String getGlobalCompositeOperation()
```
    Gets the global composite operation.
    
    Returns:
    the global composite operation as a String
    See Also:
    setGlobalCompositeOperation(Composite), setGlobalCompositeOperation(String)
  - getImageData
```
public final ImageData getImageData(double sx,
                     double sy,
                     double sw,
                     double sh)
```
    Returns an image data object for the screen area denoted by sx, sy, sw and sh.
    
    Parameters:
    sx - the x coordinate of the upper-left corner of the desired area
    sy - the y coordinate of the upper-left corner of the desired area
    sw - the width of the desired area
    sh - the height of the desired area
    
    Returns:
    an ImageData object containing screen pixel data
  - getLineCap
```
public final java.lang.String getLineCap()
```
    Gets the current line-cap style.
    
    Returns:
    the line cap style as a String
    See Also:
    setLineCap(LineCap), setLineCap(String)
  - getLineJoin
```
public final java.lang.String getLineJoin()
```
    Gets the current line-join style.
    
    Returns:
    the line join style as a String
    See Also:
    setLineJoin(LineJoin), setLineJoin(String)
  - getLineWidth
```
public final double getLineWidth()
```
    Gets the current line-width.
    
    Returns:
    the line width as a double
    See Also:
    setLineWidth(double)
  - getMiterLimit
```
public final double getMiterLimit()
```
    Gets the current miter-limit.
    
    Returns:
    the miter limit as a double
    See Also:
    setMiterLimit(double)
  - getShadowBlur
```
public final double getShadowBlur()
```
    Gets the current shadow-blur.
    
    Returns:
    the shadow blur amount as a double
    See Also:
    setShadowBlur(double)
  - getShadowColor
```
public final java.lang.String getShadowColor()
```
    Gets the current shadow color.
    
    Returns:
    the shadow color as a String
    See Also:
    setShadowColor(String)
  - getShadowOffsetX
```
public final double getShadowOffsetX()
```
    Gets the current x-shadow-offset.
    
    Returns:
    the shadow x offset as a double
    See Also:
    setShadowOffsetX(double), getShadowOffsetY()
  - getShadowOffsetY
```
public final double getShadowOffsetY()
```
    Gets the current y-shadow-offset.
    
    Returns:
    the shadow y offset as a double
    See Also:
    setShadowOffsetY(double), getShadowOffsetX()
  - getStrokeStyle
```
public final FillStrokeStyle getStrokeStyle()
```
    Returns the context's strokeStyle. In dev mode, the returned object will be wrapped in a JavaScript array.
    
    Returns:
    the stroke style as a FillStrokeStyle object
    See Also:
    setStrokeStyle(FillStrokeStyle), setStrokeStyle(String), CssColor
  - getTextAlign
```
public final java.lang.String getTextAlign()
```
    Gets the current text align.
    
    Returns:
    the text align as a String
    See Also:
    setTextAlign(TextAlign), setTextAlign(String)
  - getTextBaseline
```
public final java.lang.String getTextBaseline()
```
    Gets the current text baseline.
    
    Returns:
    the text baseline as a String
    See Also:
    setTextBaseline(TextBaseline), setTextBaseline(String)
  - isPointInPath
```
public final boolean isPointInPath(double x,
                    double y)
```
    Returns true if the given point is in the current path.
    
    Parameters:
    x - the x coordinate of the point to test.
    y - the y coordinate of the point to test.
    
    Returns:
    true if the given point is in the current path.
  - lineTo
```
public final void lineTo(double x,
          double y)
```
    Adds a line from the current point to the point (x, y) to the current path.
    
    Parameters:
    x - the x coordinate of the line endpoint
    y - the y coordinate of the line endpoint
  - measureText
```
public final TextMetrics measureText(java.lang.String text)
```
    Returns the metrics for the given text.
    
    Parameters:
    text - the text to measure, as a String
    
    Returns:
    a TextMetrics object
  - moveTo
```
public final void moveTo(double x,
          double y)
```
    Terminates the current path and sets the current path position to the point (x, y).
    
    Parameters:
    x - the x coordinate of the new position
    y - the y coordinate of the new position
  - putImageData
```
public final void putImageData(ImageData imagedata,
                double x,
                double y)
```
    Draws the given image data at the given screen position.
    
    Parameters:
    imagedata - an ImageData instance to be written to the screen
    x - the x coordinate of the upper-left corner at which to draw
    y - the y coordinate of the upper-left corner at which to draw
  - quadraticCurveTo
```
public final void quadraticCurveTo(double cpx,
                    double cpy,
                    double x,
                    double y)
```
    Draws a quadratic Bézier curve from the current point to the point (x, y), with control point (cpx, cpy).
    
    Parameters:
    cpx - the x coordinate of the control point
    cpy - the y coordinate of the control point
    x - the x coordinate of the end point
    y - the y coordinate of the end point
  - rect
```
public final void rect(double x,
        double y,
        double w,
        double h)
```
    Creates a new rectangular path.
    
    Parameters:
    x - the x coordinate of the rectangle's upper-left corner
    y - the y coordinate of the rectangle's upper-left corner
    w - the width of the rectangle
    h - the height of the rectangle
  - restore
```
public final void restore()
```
    Restores the context's state.
  - rotate
```
public final void rotate(double angle)
```
    Applies rotation to the current transform.
    
    Parameters:
    angle - the clockwise rotation angle, in radians
  - save
```
public final void save()
```
    Saves the context's state.
  - scale
```
public final void scale(double x,
         double y)
```
    Applies scale to the current transform.
    
    Parameters:
    x - the scale factor along the x-axis
    y - the scale factor along the y-axis
  - setFillStyle
```
public final void setFillStyle(FillStrokeStyle fillStyle)
```
    Sets the context's fillStyle.
    
    Parameters:
    fillStyle - the fill style to set.
    See Also:
    getFillStyle(), CssColor
  - setFillStyle
```
public final void setFillStyle(java.lang.String fillStyleColor)
```
    Convenience method to set the context's fillStyle to a CssColor, specified in String form.
    
    Parameters:
    fillStyleColor - the color as a String
    See Also:
    getFillStyle()
  - setFont
```
public final void setFont(java.lang.String f)
```
    Sets the font.
    
    Parameters:
    f - the font name as a String
    See Also:
    getFont()
  - setGlobalAlpha
```
public final void setGlobalAlpha(double alpha)
```
    Sets the global alpha value.
    
    Parameters:
    alpha - the global alpha value as a double
    See Also:
    getGlobalAlpha()
  - setGlobalCompositeOperation
```
public final void setGlobalCompositeOperation(Context2d.Composite composite)
```
    Sets the global composite operation.
    
    Parameters:
    composite - a Context2d.Composite value
    See Also:
    getGlobalCompositeOperation()
  - setGlobalCompositeOperation
```
public final void setGlobalCompositeOperation(java.lang.String globalCompositeOperation)
```
    Sets the global composite operation.
    
    Parameters:
    globalCompositeOperation - the operation as a String
    See Also:
    getGlobalCompositeOperation()
  - setLineCap
```
public final void setLineCap(Context2d.LineCap lineCap)
```
    Sets the line-cap style.
    
    Parameters:
    lineCap - the line cap style as a Context2d.LineCap value
    See Also:
    getLineCap()
  - setLineCap
```
public final void setLineCap(java.lang.String lineCap)
```
    Sets the line-cap style.
    
    Parameters:
    lineCap - the line cap style as a String
    See Also:
    getLineCap()
  - setLineJoin
```
public final void setLineJoin(Context2d.LineJoin lineJoin)
```
    Sets the line-join style.
    
    Parameters:
    lineJoin - the line join style as a Context2d.LineJoin value
    See Also:
    getLineJoin()
  - setLineJoin
```
public final void setLineJoin(java.lang.String lineJoin)
```
    Sets the line-join style.
    
    Parameters:
    lineJoin - the ling join style as a String
    See Also:
    getLineJoin()
  - setLineWidth
```
public final void setLineWidth(double lineWidth)
```
    Sets the line-width.
    
    Parameters:
    lineWidth - the line width as a double
    See Also:
    getMiterLimit(), getLineWidth()
  - setMiterLimit
```
public final void setMiterLimit(double miterLimit)
```
    Sets the miter-limit.
    
    Parameters:
    miterLimit - the miter limit as a double
    See Also:
    getMiterLimit()
  - setShadowBlur
```
public final void setShadowBlur(double shadowBlur)
```
    Sets the shadow-blur.
    
    Parameters:
    shadowBlur - the amount of blur as a double
    See Also:
    getShadowBlur()
  - setShadowColor
```
public final void setShadowColor(java.lang.String shadowColor)
```
    Sets the shadow-color.
    
    Parameters:
    shadowColor - the shadow color as a String
    See Also:
    getShadowColor()
  - setShadowOffsetX
```
public final void setShadowOffsetX(double shadowOffsetX)
```
    Sets the x-shadow-offset.
    
    Parameters:
    shadowOffsetX - the x shadow offset
    See Also:
    getShadowOffsetX(), getShadowOffsetY()
  - setShadowOffsetY
```
public final void setShadowOffsetY(double shadowOffsetY)
```
    Sets the y-shadow-offset.
    
    Parameters:
    shadowOffsetY - the y shadow offset
    See Also:
    getShadowOffsetX(), getShadowOffsetY()
  - setStrokeStyle
```
public final void setStrokeStyle(FillStrokeStyle strokeStyle)
```
    Sets the context's stroke style.
    
    Parameters:
    strokeStyle - the stroke style to set
    See Also:
    getStrokeStyle(), CssColor
  - setStrokeStyle
```
public final void setStrokeStyle(java.lang.String strokeStyleColor)
```
    Convenience method to set the context's strokeStyle to a CssColor.
    
    Parameters:
    strokeStyleColor - the stroke color as a String
    See Also:
    getStrokeStyle()
  - setTextAlign
```
public final void setTextAlign(java.lang.String align)
```
    Sets the text alignment.
    
    Parameters:
    align - the alignment setting as a String
    See Also:
    getTextAlign()
  - setTextAlign
```
public final void setTextAlign(Context2d.TextAlign align)
```
    Sets the text alignment.
    
    Parameters:
    align - the alignment setting as a Context2d.TextAlign value
    See Also:
    getTextAlign()
  - setTextBaseline
```
public final void setTextBaseline(java.lang.String baseline)
```
    Sets the text baseline.
    
    Parameters:
    baseline - the baseline setting as a String
    See Also:
    getTextBaseline()
  - setTextBaseline
```
public final void setTextBaseline(Context2d.TextBaseline baseline)
```
    Sets the text baseline.
    
    Parameters:
    baseline - a the baseline setting as a Context2d.TextBaseline value
    See Also:
    getTextBaseline()
  - setTransform
```
public final void setTransform(double m11,
                double m12,
                double m21,
                double m22,
                double dx,
                double dy)
```
    Sets the 2D transformation matrix.
    
    Parameters:
    m11 - the value at position (1, 1) of the matrix
    m12 - the value at position (1, 2) of the matrix
    m21 - the value at position (2, 1) of the matrix
    m22 - the value at position (2, 2) of the matrix
    dx - the x translation value
    dy - the y translation value
  - stroke
```
public final void stroke()
```
    Draws the current path with the current stroke style.
  - strokeRect
```
public final void strokeRect(double x,
              double y,
              double w,
              double h)
```
    Draws the outline of a rectangle with the current stroke style.
    
    Parameters:
    x - the x coordinate of the rectangle's upper-left corner
    y - the y coordinate of the rectangle's upper-left corner
    w - the width of the rectangle
    h - the height of the rectangle
  - strokeText
```
public final void strokeText(java.lang.String text,
              double x,
              double y)
```
    Draws the text outline.
    
    Parameters:
    text - the text as a String
    x - the x coordinate of the text position
    y - the y coordinate of the text position
  - strokeText
```
public final void strokeText(java.lang.String text,
              double x,
              double y,
              double maxWidth)
```
    Draws the text outline, squeezing the text into the given max width by compressing the font.
    
    Parameters:
    text - the text as a String
    x - the x coordinate of the text position
    y - the y coordinate of the text position
    maxWidth - the maximum width for the text
  - transform
```
public final void transform(double m11,
             double m12,
             double m21,
             double m22,
             double dx,
             double dy)
```
    Multiplies the current transform by the given matrix.
    
    Parameters:
    m11 - the value at position (1, 1) of the matrix
    m12 - the value at position (1, 2) of the matrix
    m21 - the value at position (2, 1) of the matrix
    m22 - the value at position (2, 2) of the matrix
    dx - the x translation value
    dy - the y translation value
  - translate
```
public final void translate(double x,
             double y)
```
    Applies a translation to the current transform.
    
    Parameters:
    x - the amount of translation along the x-axis
    y - the amount of translation along the y-axis

Class Context2d

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class com.google.gwt.core.client.JavaScriptObject

Methods inherited from class java.lang.Object

Field Detail

CONTEXT_ID

Constructor Detail

Context2d

Method Detail

arc

arc

arcTo

beginPath

bezierCurveTo

clearRect

clip

closePath

createImageData

createImageData

createLinearGradient

createPattern

createPattern

createPattern

createPattern

createRadialGradient

drawImage

drawImage

drawImage

drawImage

drawImage

drawImage

drawImage

drawImage

drawImage

fill

fillRect

fillText

fillText

getCanvas

getFillStyle

getFont

getGlobalAlpha

getGlobalCompositeOperation

getImageData

getLineCap

getLineJoin

getLineWidth

getMiterLimit

getShadowBlur

getShadowColor

getShadowOffsetX

getShadowOffsetY

getStrokeStyle

getTextAlign

getTextBaseline

isPointInPath

lineTo

measureText

moveTo

putImageData

quadraticCurveTo

rect

restore

rotate

save

scale

setFillStyle

setFillStyle

setFont

setGlobalAlpha

setGlobalCompositeOperation

setGlobalCompositeOperation

setLineCap

setLineCap

setLineJoin

setLineJoin

setLineWidth