com.myscript.iink.graphics

Interface ICanvas

public interface ICanvas

The ICanvas interface receives drawing commands.

Method Summary

Modifier and Type	Method and Description
IPath	createPath() Creates a new general path.
void	drawLine(float x1, float y1, float x2, float y2) Requests drawing of a line segment.
void	drawObject(java.lang.String url, java.lang.String mimeType, float x, float y, float width, float height) Requests drawing of an object.
void	drawPath(IPath path) Requests drawing of a path.
void	drawRectangle(float x, float y, float width, float height) Requests drawing of a rectangle.
void	drawText(java.lang.String label, float x, float y, float xmin, float ymin, float xmax, float ymax) Requests drawing of text.
void	endGroup(java.lang.String id) Indicates that the drawing of a group of items ends.
void	endItem(java.lang.String id) Indicates that the drawing of an item ends.
Transform	getTransform() Retrieves the current transform.
void	setFillColor(Color fillColor) Sets the fill color.
void	setFillRule(FillRule fillRule) Sets the fill rule.
void	setFontProperties(java.lang.String family, float lineHeight, float size, java.lang.String style, java.lang.String variant, int weight) Sets the font properties.
void	setStrokeColor(Color strokeColor) Sets the stroke color.
void	setStrokeDashArray(float[] strokeDashArray) Sets the pattern of dashes and gaps used to stroke paths.
void	setStrokeDashOffset(float strokeDashOffset) Sets the distance into the dash pattern to start the dash.
void	setStrokeLineCap(LineCap strokeLineCap) Sets the stroke line cap.
void	setStrokeLineJoin(LineJoin strokeLineJoin) Sets the stroke line join.
void	setStrokeMiterLimit(float strokeMiterLimit) Sets the stroke miter limit.
void	setStrokeWidth(float strokeWith) Sets the stroke width.
void	setTransform(Transform transform) Sets the transform.
void	startGroup(java.lang.String id, float x, float y, float width, float height, boolean clipContent) Indicates that the drawing of a group of items starts.
void	startItem(java.lang.String id) Indicates that the drawing of an item starts.

Method Detail

setTransform

void setTransform(Transform transform)

Sets the transform.

Parameters:

transform - the transform.

getTransform

Transform getTransform()

Retrieves the current transform.

Returns:

the transform.

setStrokeColor

void setStrokeColor(Color strokeColor)

Sets the stroke color.

Parameters:

strokeColor - the stroke color.

setStrokeWidth

void setStrokeWidth(float strokeWith)

Sets the stroke width.

Parameters:

strokeWith - the stroke width.

setStrokeLineCap

void setStrokeLineCap(LineCap strokeLineCap)

Sets the stroke line cap.

Parameters:

strokeLineCap - the stroke line cap.

setStrokeLineJoin

void setStrokeLineJoin(LineJoin strokeLineJoin)

Sets the stroke line join.

Parameters:

strokeLineJoin - the stroke line join.

setStrokeMiterLimit

void setStrokeMiterLimit(float strokeMiterLimit)

Sets the stroke miter limit.

Parameters:

strokeMiterLimit - the stroke miter limit.

setStrokeDashArray

void setStrokeDashArray(float[] strokeDashArray)

Sets the pattern of dashes and gaps used to stroke paths.

Parameters:

strokeDashArray - the vector describing the dashes pattern.

setStrokeDashOffset

void setStrokeDashOffset(float strokeDashOffset)

Sets the distance into the dash pattern to start the dash.

Parameters:

strokeDashOffset - the dash offset.

setFillColor

void setFillColor(Color fillColor)

Sets the fill color.

Parameters:

fillColor - the fill color.

setFillRule

void setFillRule(FillRule fillRule)

Sets the fill rule.

Parameters:

fillRule - the fill rule.

setFontProperties

void setFontProperties(java.lang.String family,
                       float lineHeight,
                       float size,
                       java.lang.String style,
                       java.lang.String variant,
                       int weight)

Sets the font properties.

Parameters:

family - the font family.

lineHeight - the font line height.

size - the font size.

style - the font style.

variant - the font variant.

weight - the font weight.

startGroup

void startGroup(java.lang.String id,
                float x,
                float y,
                float width,
                float height,
                boolean clipContent)

Indicates that the drawing of a group of items starts.

Parameters:

id - the identifier of the group.

x - the x coordinate of the top left point of the group box.

y - the y coordinate of the top left point of the group box.

width - the width of the group box.

height - the height of the group box.

clipContent - `true` if the canvas should use the group box as the clipping region until corresponding endGroup(String), otherwise `false`.

endGroup

void endGroup(java.lang.String id)

Indicates that the drawing of a group of items ends.

Parameters:

id - the identifier of the group.

startItem

void startItem(java.lang.String id)

Indicates that the drawing of an item starts.

Parameters:

id - the identifier of the group.

endItem

void endItem(java.lang.String id)

Indicates that the drawing of an item ends.

Parameters:

id - the identifier of the group.

createPath

IPath createPath()

Creates a new general path. The renderer will then send commands to this path, and it will be used in the call to drawPath(IPath).

Note: the drawPath(IPath) method may be called with a path that was created by another instance of canvas, because the renderer maintains a cache of the paths that hold the visual representation of ink strokes.

Returns:

the newly created general path.

drawPath

void drawPath(IPath path)

Requests drawing of a path.

Parameters:

path - the path to draw.

drawRectangle

void drawRectangle(float x,
                   float y,
                   float width,
                   float height)

Requests drawing of a rectangle.

Parameters:

x - the x coordinate of the top left point.

y - the y coordinate of the top left point.

width - the width.

height - the height.

drawLine

void drawLine(float x1,
              float y1,
              float x2,
              float y2)

Requests drawing of a line segment.

Parameters:

x1 - the x coordinate of the first point.

y1 - the y coordinate of the first point.

x2 - the x coordinate of the last point.

y2 - the y coordinate of the last point.

drawObject

void drawObject(java.lang.String url,
                java.lang.String mimeType,
                float x,
                float y,
                float width,
                float height)

Requests drawing of an object.

Note: the object should be transformed (translation and uniform scale) so that it fits centered in the specified viewport rectangle.

Parameters:

url - the URL of the object.

mimeType - the Mime type associated with the object.

x - the x coordinate of the top left point of the viewport rectangle.

y - the y coordinate of the top left point of the viewport rectangle.

width - the width of the viewport rectangle.

height - the height of the viewport rectangle.

drawText

void drawText(java.lang.String label,
              float x,
              float y,
              float xmin,
              float ymin,
              float xmax,
              float ymax)

Requests drawing of text.

Note: the extent of the rendered text as given by xmin, ymin, xmax, and ymax is informative and should not be used for the actual rendering.

Parameters:

label - the label of the text to draw.

x - the x coordinate of the position from where to draw the text.

y - the y coordinate of the position from where to draw the text.

xmin - minimal x coordinate of the rendered text.

ymin - minimal y coordinate of the rendered text.

xmax - maximal x coordinate of the rendered text.

ymax - maximal y coordinate of the rendered text.