Class StringNumber

Modifier is an abstract interface for notational elements that modify a Note. Examples of modifiers are Accidental, Annotation, Stroke, etc.

For a Modifier instance to be positioned correctly, it must be part of a ModifierContext. All modifiers in the same context are rendered relative to one another.

Typically, all modifiers to a note are part of the same ModifierContext instance. Also, in multi-voice staves, all modifiers to notes on the same tick are part of the same ModifierContext. This ensures that multiple voices don't trample all over each other.

Hierarchy

Constructors

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
  • Modifiers category string. Every modifier has a different category. The ModifierContext uses this to determine the type and order of the modifiers.

    Returns string

  • get Position(): typeof ModifierPosition
  • Modifiers can be positioned almost anywhere, relative to a note.

    Returns typeof ModifierPosition

  • get PositionString(): Record<string, number>
  • Returns Record<string, 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 StringNumber

  • Used in draw() to check and get the attached note (StaveNote, TabNote, etc.). Also verifies that the index is valid.

    Returns Note

  • Check and get note index, which is a specific note in a chord.

    Returns number

  • Render the modifier onto the canvas.

    Returns void

  • 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

  • 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

  • Get note index, which is a specific note in a chord.

    Returns undefined | number

  • Return associated SVGElement.

    Parameters

    • suffix: string = ''

    Returns undefined | SVGElement

  • Get element text.

    Returns string

  • Get element width.

    Returns number

  • Get the X coordinate.

    Returns number

  • Get shift modifier x

    Returns number

  • Get the Y coordinate.

    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

  • Render the element text.

    Parameters

    Returns void

  • 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 StringNumber

  • Parameters

    • x: number
    • y: number

    Returns void

  • 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 StringNumber

  • Returns undefined | HTMLCanvasElement | OffscreenCanvas

  • Measure the text using the FontInfo related with key.

    Parameters

    • text: string
    • key: string = ''

    Returns number