Class Transformer

Transformer class that contains all matrices and is responsible for transforming values into pixels on the screen and backwards.

Hierarchy (View Summary)

Constructors

constructor

Properties

mMatrixOffset mMatrixValueToPx mPixelToValueMatrixBuffer mValuePointsForGenerateTransformedValues mValuePointsForGenerateTransformedValuesBubble mValuePointsForGenerateTransformedValuesCandle mValuePointsForGenerateTransformedValuesScatter mViewPortHandler

Methods

generateTransformedValues generateTransformedValuesBubble generateTransformedValuesCandle generateTransformedValuesScatter getOffsetMatrix getPixelForValues getPixelToValueMatrix getValueMatrix getValuesByTouchPoint getValueToPixelMatrix mapPoints pathValuesToPixel pathValueToPixel pixelsToValue pointValuesToPixel prepareMatrixOffset prepareMatrixValuePx rectToPixelPhase rectToPixelPhaseHorizontal rectValuesToPixel rectValueToPixel rectValueToPixelHorizontal

Constructors

constructor

Properties

ProtectedmMatrixOffset

mMatrixOffset: Matrix

matrix for handling the different offsets of the chart

ProtectedmMatrixValueToPx

mMatrixValueToPx: Matrix

matrix to map the values to the screen pixels

ProtectedmPixelToValueMatrixBuffer

mPixelToValueMatrixBuffer: Matrix

ProtectedmValuePointsForGenerateTransformedValues

mValuePointsForGenerateTransformedValues: TypedArray

ProtectedmValuePointsForGenerateTransformedValuesBubble

mValuePointsForGenerateTransformedValuesBubble: TypedArray

ProtectedmValuePointsForGenerateTransformedValuesCandle

mValuePointsForGenerateTransformedValuesCandle: TypedArray

ProtectedmValuePointsForGenerateTransformedValuesScatter

mValuePointsForGenerateTransformedValuesScatter: TypedArray

ProtectedmViewPortHandler

mViewPortHandler: ViewPortHandler

Methods

generateTransformedValues

  • generateTransformedValues(
        dataSet: IDataSet<Entry>,
        phaseX: any,
        phaseY: any,
        from: any,
        to: any,
    ): { count: number; points: number[] | TypedArray }

  • Transforms an List of Entry into a let array containing the x and y values transformed with all matrices for the BUBBLECHART.

    Parameters

    Returns { count: number; points: number[] | TypedArray }

generateTransformedValuesBubble

  • generateTransformedValuesBubble(
        dataSet: BubbleDataSet,
        phaseY: any,
        from: any,
        to: any,
    ): { count: number; points: number[] | TypedArray }

  • Transforms an List of Entry into a float array containing the x and y values transformed with all matrices for the BUBBLECHART.

    Parameters

    Returns { count: number; points: number[] | TypedArray }

generateTransformedValuesCandle

  • generateTransformedValuesCandle(
        dataSet: CandleDataSet,
        phaseX: any,
        phaseY: any,
        from: any,
        to: any,
    ): { count: number; points: number[] | TypedArray }

  • Transforms an List of Entry into a let array containing the x and y values transformed with all matrices for the CANDLESTICKCHART.

    Parameters

    Returns { count: number; points: number[] | TypedArray }

generateTransformedValuesScatter

  • generateTransformedValuesScatter(
        dataSet: IDataSet<Entry>,
        phaseX: any,
        phaseY: any,
        from: any,
        to: any,
    ): { count: number; points: number[] | TypedArray }

  • Transforms an List of Entry into a let array containing the x and y values transformed with all matrices for the SCATTERCHART.

    Parameters

    Returns { count: number; points: number[] | TypedArray }

getOffsetMatrix

  • getOffsetMatrix(): Matrix

  • Returns Matrix

getPixelForValues

  • getPixelForValues(x: any, y: any): { x: number; y: number }

  • Returns a recyclable MPPointD instance. Returns the x and y coordinates (pixels) for a given x and y value in the chart.

    Parameters

    • x: any
    • y: any

    Returns { x: number; y: number }

getPixelToValueMatrix

  • getPixelToValueMatrix(): Matrix

  • Returns Matrix

getValueMatrix

  • getValueMatrix(): Matrix

  • Returns Matrix

getValuesByTouchPoint

  • getValuesByTouchPoint(x: any, y: any, outputPoint?: any): any

  • Returns a recyclable MPPointD instance. returns the x and y values in the chart at the given touch point (encapsulated in a MPPointD). This method transforms pixel coordinates to coordinates / values in the chart. This is the opposite method to getPixelForValues(...).

    Parameters

    • x: any
    • y: any
    • OptionaloutputPoint: any

    Returns any

getValueToPixelMatrix

  • getValueToPixelMatrix(): Matrix

  • Returns Matrix

mapPoints

  • mapPoints(matrix: Matrix, pts: number[] | TypedArray): void

  • Parameters

    • matrix: Matrix
    • pts: number[] | TypedArray

    Returns void

pathValuesToPixel

  • pathValuesToPixel(paths: Path[]): void

  • Transforms multiple paths will all matrices.

    Parameters

    • paths: Path[]

    Returns void

pathValueToPixel

  • pathValueToPixel(path: Path): void

  • transform a path with all the given matrices VERY IMPORTANT: keep order to value-touch-offset

    Parameters

    • path: Path

    Returns void

pixelsToValue

  • pixelsToValue(pixels: any): void

  • Transforms the given array of touch positions (pixels) (x, y, x, y, ...) into values on the chart.

    Parameters

    • pixels: any

    Returns void

pointValuesToPixel

  • pointValuesToPixel(pts: number[] | TypedArray): void

  • Transform an array of points with all matrices. VERY IMPORTANT: Keep matrix order "value-touch-offset" when transforming.

    Parameters

    • pts: number[] | TypedArray

    Returns void

prepareMatrixOffset

  • prepareMatrixOffset(inverted: any): void

  • Prepares the matrix that contains all offsets.

    Parameters

    • inverted: any

    Returns void

prepareMatrixValuePx

  • prepareMatrixValuePx(
        xChartMin: any,
        deltaX: any,
        deltaY: any,
        yChartMin: any,
    ): void

  • Prepares the matrix that transforms values to pixels. Calculates the scale factors from the charts size and offsets.

    Parameters

    • xChartMin: any
    • deltaX: any
    • deltaY: any
    • yChartMin: any

    Returns void

rectToPixelPhase

  • rectToPixelPhase(r: Rect, phaseY: any): void

  • Transform a rectangle with all matrices with potential animation phases.

    Parameters

    • r: Rect
    • phaseY: any

    Returns void

rectToPixelPhaseHorizontal

  • rectToPixelPhaseHorizontal(r: Rect, phaseY: any): void

  • Parameters

    • r: Rect
    • phaseY: any

    Returns void

rectValuesToPixel

  • rectValuesToPixel(rects: Rect[]): void

  • transforms multiple rects with all matrices

    Parameters

    • rects: Rect[]

    Returns void

rectValueToPixel

  • rectValueToPixel(r: any): void

  • Transform a rectangle with all matrices.

    Parameters

    • r: any

    Returns void

rectValueToPixelHorizontal

  • rectValueToPixelHorizontal(r: Rect, phaseY?: any): void

  • Transform a rectangle with all matrices with potential animation phases.

    Parameters

    • r: Rect
    • OptionalphaseY: any

    Returns void

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