Context2d (GWT Javadoc)

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com.google.gwt.canvas.dom.client
Class Context2d

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
extends JavaScriptObject
implements Context

Rendering interface used to draw on a CanvasElement.

See Also:: W3C HTML 5 Specification

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

Constructor Summary
`protected`	`Context2d()`

Method Summary
`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

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com.google.gwt.canvas.dom.client Class Context2d

CONTEXT_ID

Context2d

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

setMiterLimit

setShadowBlur

setShadowColor

setShadowOffsetX

setShadowOffsetY

setStrokeStyle

setStrokeStyle

setTextAlign

setTextAlign

com.google.gwt.canvas.dom.client
Class Context2d