ASP.NET Core MVC Controls | ComponentOne
In This Topic
    IRenderEngine Interface
    In This Topic
    File
    wijmo.chart.js
    Module
    wijmo.chart

    Represents a rendering engine that performs the basic drawing routines.

    Properties

    Methods

    Properties

    cssPriority

    Gets or sets the value that indicates css priority. By default, it's true and the specified css class has a priority over current engine's properties like fill or stroke.

    Type
    boolean

    element

    Gets the rendered element.

    Type
    Element

    fill

    Gets or sets the color used to fill the element.

    Type
    string

    fontFamily

    Gets or sets the font family for the text output.

    Type
    string

    fontSize

    Gets or sets the font size for the text output.

    Type
    string

    stroke

    Gets or sets the color used to outline the element.

    Type
    string

    strokeWidth

    Gets or sets the thickness of the outline.

    Type
    number

    textFill

    Gets or sets the text color.

    Type
    string

    Methods

    addClipRect

    addClipRect(clipRect: Rect, id: string): void
    

    Adds a clipping rectangle to the context.

    Parameters
    • clipRect: Rect

      The clipping rectangle.

    • id: string

      The ID of the clipping rectangle.

    Returns
    void

    beginRender

    beginRender(): void
    

    Clears the viewport and starts the rendering cycle.

    Returns
    void

    drawDonutSegment

    drawDonutSegment(cx: number, cy: number, radius: number, innerRadius: number, startAngle: number, sweepAngle: number, className?: string, style?: any, clipPath?: string): void
    

    Draws a doughnut segment.

    Parameters
    • cx: number

      X coordinate of the segment center.

    • cy: number

      Y coordinate of the segment center.

    • radius: number

      Outer radius of the segment.

    • innerRadius: number

      Inner radius of the segment.

    • startAngle: number

      Start angle of the segment, in degrees.

    • sweepAngle: number

      Sweep angle of the segment, in degrees clockwise.

    • className: string
    Optional

    Class name to be applied to the element.

    Style object to be applied to the element.

    Id of the path to use as a clipping path.

    Returns
    void

    drawEllipse

    drawEllipse(cx: number, cy: number, rx: number, ry: number, className?: string, style?: any): void
    

    Draws an ellipse.

    Parameters
    • cx: number

      X coordinate of the ellipse's center.

    • cy: number

      Y coordinate of the ellipse's center.

    • rx: number

      X radius (half of the ellipse's width).

    • ry: number

      Y radius (half of the ellipse's height).

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    Returns
    void

    drawImage

    drawImage(href: string, x: number, y: number, w: number, h: number): void
    

    Draws an image.

    Parameters
    • href: string

      Url of the image to draw.

    • x: number

      Left coordinate of the image's bounding rectangle.

    • y: number

      Bottom coordinate of the image's bounding rectangle.

    • w: number

      Image width.

    • h: number

      Image height.

    Returns
    void

    drawLine

    drawLine(x1: number, y1: number, x2: number, y2: number, className?: string, style?: any): void
    

    Draws a line.

    Parameters
    • x1: number

      X coordinate of the first point.

    • y1: number

      Y coordinate of the first point.

    • x2: number

      X coordinate of the second point.

    • y2: number

      Y coordinate of the second point.

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    Returns
    void

    drawLines

    drawLines(xs: number[], ys: number[], className?: string, style?: any, clipPath?: string, num?: number): void
    

    Draws a series of lines.

    Parameters
    • xs: number[]

      Array of X coordinates.

    • ys: number[]

      Array of Y coordinates.

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    • clipPath: string Optional

      Id of the path to use as a clipping path.

    • num: number Optional
    Returns
    void

    drawPieSegment

    drawPieSegment(cx: number, cy: number, radius: number, startAngle: number, sweepAngle: number, className?: string, style?: any, clipPath?: string): void
    

    Draws a pie segment.

    Parameters
    • cx: number

      X coordinate of the segment center.

    • cy: number

      Y coordinate of the segment center.

    • radius: number

      Radius of the segment.

    • startAngle: number

      Start angle of the segment, in degrees.

    • sweepAngle: number

      Sweep angle of the segment, in degrees clockwise.

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    • clipPath: string Optional

      Id of the path to use as a clipping path.

    Returns
    void

    drawPolygon

    drawPolygon(xs: number[], ys: number[], className?: string, style?: any, clipPath?: string): void
    

    Draws a polygon.

    Parameters
    • xs: number[]

      Array of X coordinates.

    • ys: number[]

      Array of Y coordinates.

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    • clipPath: string Optional

      Id of the path to use as a clipping path.

    Returns
    void

    drawRect

    drawRect(x: number, y: number, w: number, h: number, className?: string, style?: any, clipPath?: string): void
    

    Draws a rectangle.

    Parameters
    • x: number

      Left of the rectangle.

    • y: number

      Bottom of the rectangle.

    • w: number

      Width of the rectangle.

    • h: number

      Height of the rectangle.

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    • clipPath: string Optional

      Id of the path to use as a clipping path.

    Returns
    void

    drawSplines

    drawSplines(xs: number[], ys: number[], className?: string, style?: any, clipPath?: string, num?: number): void
    

    Draws a series of splines (smooth path).

    Parameters
    • xs: number[]

      Array of X coordinates.

    • ys: number[]

      Array of Y coordinates.

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    • clipPath: string Optional

      Id of the path to use as a clipping path.

    • num: number Optional
    Returns
    void

    drawString

    drawString(s: string, pt: Point, className?: string, style?: any): void
    

    Draws a string.

    Parameters
    • s: string

      String to be drawn.

    • pt: Point

      Reference point for the string.

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    Returns
    void

    drawStringRotated

    drawStringRotated(s: string, pt: Point, center: Point, angle: number, className?: string, style?: any): void
    

    Draws a rotated string.

    Parameters
    • s: string

      String to be drawn.

    • pt: Point

      Reference point for rendering the string.

    • center: Point

      Reference point for rotating the string.

    • angle: number

      Rotation angle, in degrees, clockwise.

    • className: string Optional

      Class name to be applied to the element.

    • style: any Optional

      Style object to be applied to the element.

    Returns
    void

    endGroup

    endGroup(): void
    

    Ends a group.

    Returns
    void

    endRender

    endRender(): void
    

    Finishes the rendering cycle.

    Returns
    void

    measureString

    measureString(s: string, className?: string, groupName?: string, style?: any): Size
    

    Measures a string.

    Parameters
    • s: string

      String to be measured.

    • className: string Optional

      Class name to use when measuring the string.

    • groupName: string Optional

      Name of the group to use when measuring the string.

    • style: any Optional

      Style object to use when measuring the string.

    Returns
    Size

    setViewportSize

    setViewportSize(w: number, h: number): void
    

    Sets the size of the viewport.

    Parameters
    Returns
    void

    startGroup

    startGroup(className?: string, clipPath?: string, createTransform?: boolean): void
    

    Starts a group.

    Parameters
    • className: string Optional

      Class name to apply to the new group.

    • clipPath: string Optional

      Id of the path to use as a clipping path.

    • createTransform: boolean Optional

      Whether to create a new transform for the group.

    Returns
    void