Class TabStave

Element implements a generic base class for VexFlow, with implementations of general functions and properties that can be inherited by all VexFlow elements.

The Element handles style and font properties for the Element and any child elements, along with working with the Registry to create unique ids.

The text is a series of unicode characters (including SMuFL codes). The textFont property contains information required to style the text (i.e., font family, size, weight, and style). This font family is a comma separated list of fonts. The method measureText calculates the textMetrics, boundingBox, height and width of the text. The method renderText(...) will render the text using the provided context and coordinates, taking xShift and yShift into account.

Hierarchy

Constructors

Properties

Accessors

Methods

Constructors

Properties

options: Required<StaveOptions>

Accessors

  • get font(): string
  • Returns the CSS compatible font string for the text font.

    Returns string

  • set font(f): void
  • Provide a CSS compatible font string (e.g., 'bold 16px Arial') that will be applied to text (not glyphs).

    Parameters

    • f: string

    Returns void

  • get fontInfo(): Required<FontInfo>
  • Return a copy of the current FontInfo object.

    Returns Required<FontInfo>

  • set fontInfo(fontInfo): void
  • Set the current FontInfo object.

    Parameters

    Returns void

  • get fontSize(): string
  • Returns string

    a CSS font-size string (e.g., '18pt', '12px', '1em').

  • set fontSize(size): void
  • The size is 1) a string of the form '10pt' or '16px', compatible with the CSS font-size property. or 2) a number, which is interpreted as a point size (i.e. 12 == '12pt').

    Parameters

    • size: string | number

    Returns void

  • get fontSizeInPixels(): number
  • Returns number

    the font size in px.

  • get fontSizeInPoints(): number
  • Returns number

    the font size in pt.

  • get fontStyle(): string
  • Returns string

    a CSS font-style string (e.g., 'italic').

  • set fontStyle(style): void
  • Set the font style.

    Parameters

    • style: string

    Returns void

  • get fontWeight(): string
  • Returns string

    a CSS font-weight string (e.g., 'bold'). As in CSS, font-weight is always returned as a string, even if it was set as a number.

  • set fontWeight(weight): void
  • Set the font weight.

    Parameters

    • weight: string | number

    Returns void

  • get height(): number
  • Returns number

  • set height(height): void
  • Parameters

    • height: number

    Returns void

  • get text(): string
  • Returns string

  • set text(text): void
  • Parameters

    • text: string

    Returns void

  • get textMetrics(): TextMetrics
  • Returns TextMetrics

  • get width(): number
  • Returns number

  • set width(width): void
  • Parameters

    • width: number

    Returns void

  • get CATEGORY(): string
  • Returns string

  • get defaultPadding(): number
  • Returns number

  • get rightPadding(): number
  • Returns number

Methods

  • Adds a child Element to the Element, which lets it inherit the same style as the parent when setGroupStyle() is called.

    Examples of children are noteheads and stems. Modifiers such as Accidentals are generally not set as children.

    Note that StaveNote calls setGroupStyle() when setStyle() is called.

    Parameters

    Returns TabStave

  • Add a class label (An element can have multiple class labels).

    Parameters

    • className: string

    Returns TabStave

  • Add a clef to the stave.

    Example:

    stave.addClef('treble')

    Parameters

    • clef: string

      clef (treble|bass|...) see Clef.types

    • Optional size: string
    • Optional annotation: string
    • Optional position: number

    Returns TabStave

  • Parameters

    • clef: string
    • Optional size: string
    • Optional annotation: string

    Returns TabStave

  • Add a key signature to the stave.

    Example: stave.addKeySignature('Db');

    Parameters

    • keySpec: string

      new key specification [A-G][b|#]?

    • Optional cancelKeySpec: string
    • Optional position: number

    Returns TabStave

  • Add a time signature to the stave

    Example:

    stave.addTimeSignature('4/4');

    Parameters

    • timeSpec: string

      time signature specification (C\||C|\d/\d)

    • Optional customPadding: number
    • Optional position: number

    Returns TabStave

  • Draw the element and all its sub-elements (ie.: Modifiers in a Stave) with the element's style (see getStyle() and setStyle())

    Returns void

  • Return an attribute, such as 'id', 'type' or 'class'.

    Parameters

    • name: string

    Returns any

  • Returns undefined | string

  • Get the css string describing this Element's text font. e.g., 'bold 10pt Arial'.

    Returns string

  • Returns string

    a CSS font-size string (e.g., '18pt', '12px', '1em'). See Element.fontSizeInPixels or Element.fontSizeInPoints if you need to get a number for calculation purposes.

  • Get the text height.

    Returns number

  • Parameters

    • y: number

    Returns number

  • Return the measure number of this Stave.

    Returns number

  • Gets the pixels to shift from the beginning of the stave following the modifier at the provided index

    Parameters

    • index: number = 0

      The index from which to determine the shift

    Returns number

    The amount of pixels shifted

  • Parameters

    • Optional position: number
    • Optional category: string

    Returns StaveModifier[]

    array of StaveModifiers that match the provided position and category.

  • Return associated SVGElement.

    Parameters

    • suffix: string = ''

    Returns undefined | SVGElement

  • Get element text.

    Returns string

  • Get the text metrics.

    Returns TextMetrics

  • Get element width.

    Returns number

  • Get the X coordinate.

    Returns number

  • Get shift element xShift.

    Returns number

  • Get the Y coordinate.

    Returns number

  • Parameters

    • line: number = 0

    Returns number

  • Parameters

    • line: number

    Returns number

    the y for the center of a staff line

  • Parameters

    • line: number

    Returns number

  • Parameters

    • line: number = 0

    Returns number

  • Get shift element yShift.

    Returns number

  • Check if it has a class label (An element can have multiple class labels).

    Parameters

    • className: string

    Returns boolean

  • Return the rendered status.

    Returns boolean

  • Measure the text using the textFont.

    Returns TextMetrics

  • Remove a class label (An element can have multiple class labels).

    Parameters

    • className: string

    Returns TabStave

  • Render the element text.

    Parameters

    Returns void

  • Set an attribute such as 'id', 'class', or 'type'.

    Parameters

    • name: string
    • value: undefined | string

    Returns TabStave

  • Parameters

    • clefSpec: string
    • Optional size: string
    • Optional annotation: string
    • Optional position: number

    Returns TabStave

  • Configure properties of the lines in the Stave

    Parameters

    • lineNumber: number

      The index of the line to configure.

    • lineConfig: StaveLineConfig

      An configuration object for the specified line.

    Returns TabStave

    Throws

    RuntimeError "StaveConfigError" When the specified line number is out of range of the number of lines specified in the constructor.

  • Set the staff line configuration array for all of the lines at once.

    Parameters

    • linesConfiguration: StaveLineConfig[]

      An array of line configuration objects. These objects are of the same format as the single one passed in to setLineConfiguration(). The caller can set null for any line config entry if it is desired that the default be used

    Returns TabStave

    Throws

    RuntimeError "StaveConfigError" When the lines_configuration array does not have exactly the same number of elements as the numLines configuration object set in the constructor.

  • Parameters

    • clefSpec: string
    • Optional size: string
    • Optional annotation: string

    Returns TabStave

  • Set the element's text font family, size, weight, style (e.g., Arial, 10pt, bold, italic).

    This attribute does not determine the font used for musical Glyphs like treble clefs.

    Parameters

    • Optional font: string | FontInfo

      is 1) a FontInfo object or 2) a string formatted as CSS font shorthand (e.g., 'bold 10pt Arial') or 3) a string representing the font family (at least one of size, weight, or style must also be provided).

    • Optional size: string | number

      a string specifying the font size and unit (e.g., '16pt'), or a number (the unit is assumed to be 'pt').

    • Optional weight: string | number

      is a string (e.g., 'bold', 'normal') or a number (100, 200, ... 900).

    • Optional style: string

      is a string (e.g., 'italic', 'normal'). If no arguments are provided, then the font is set to the default font. Each Element subclass may specify its own default by overriding the static TEXT_FONT property.

    Returns TabStave

  • Change the font size, while keeping everything else the same.

    Parameters

    • Optional size: string | number

    Returns TabStave

  • Parameters

    • keySpec: string
    • Optional cancelKeySpec: string
    • Optional position: number

    Returns TabStave

  • Parameters

    • x: number
    • y: number

    Returns void

  • Parameters

    • x: number

    Returns void

  • Parameters

    • y: number

    Returns void

  • Parameters

    • section: string
    • y: number
    • xOffset: number = 0
    • Optional fontSize: number
    • drawRect: boolean = true

    Returns TabStave

  • Parameters

    • text: string
    • position: number
    • options: {
          justification?: number;
          shiftX?: number;
          shiftY?: number;
      } = {}
      • Optional justification?: number
      • Optional shiftX?: number
      • Optional shiftY?: number

    Returns TabStave

  • Set the element style used to render.

    Example:

    element.setStyle({ fillStyle: 'red', strokeStyle: 'red' });
    element.draw();

    Note: If the element draws additional sub-elements (ie.: Modifiers in a Stave), the style can be applied to all of them by means of the context:

    element.setStyle({ fillStyle: 'red', strokeStyle: 'red' });
    element.getContext().setFillStyle('red');
    element.getContext().setStrokeStyle('red');
    element.draw();

    or using drawWithStyle:

    element.setStyle({ fillStyle: 'red', strokeStyle: 'red' });
    element.drawWithStyle();

    Parameters

    Returns TabStave

  • Parameters

    • timeSpec: string
    • Optional customPadding: number
    • Optional position: number

    Returns TabStave

  • Set shift element right xShift pixels. Negative values shift left.

    Parameters

    • xShift: number

    Returns TabStave

  • Shift element down yShift pixels. Negative values shift up.

    Parameters

    • yShift: number

    Returns TabStave

  • Use the modifier's getCategory() as a key for the order array. The retrieved value is used to sort modifiers from left to right (0 to to 3).

    Parameters

    Returns void

  • Parameters

    • spacing: number

    Returns number

  • Returns undefined | HTMLCanvasElement | OffscreenCanvas

  • Measure the text using the FontInfo related with key.

    Parameters

    • text: string
    • key: string = ''

    Returns number

  • Parameters

    • canvas: HTMLCanvasElement | OffscreenCanvas

    Returns void