AbstractSingleIndicatorSeries class abstract

Base class of indicator series with a single indicator.

Handles reusing result of previous indicator of the series. The decision to whether it can use the result of the old series calculated values is made inside didUpdate method.

Inheritance

• Object
• Series
• DataSeries<Tick>
• AbstractSingleIndicatorSeries

Implementers

• AwesomeOscillatorSeries
• CCISeries
• MASeries
• ParabolicSARSeries
• ROCSeries
• RSISeries
• SingleIndicatorSeries
• WilliamsRSeries

Constructors

AbstractSingleIndicatorSeries(Indicator<Tick> inputIndicator, String id, {IndicatorOptions? options, DataSeriesStyle? style, int offset = 0, HorizontalBarrierStyle? lastTickIndicatorStyle, String? axisGroup})

Initializes

Properties

axisGroup → String?

Which axis this series scales against.

final, inherited

entries ↔ List<Tick>?

The list of this class that will be painted on the canvas.

getter/setter pair, inherited

hashCode → int

The hash code for this object.

no setter, inherited

id ↔ String

The ID of this ChartData.

getter/setter pair, inherited

input → List<Tick>

Series input list.

final, inherited

inputIndicator → Indicator<Tick>

Input indicator to calculate this indicator value on.

final

lastTickIndicatorStyle → HorizontalBarrierStyle?

Style of a last tick indicator. null if indicator is absent.

final, inherited

maxValue → double

Max quote in a frame.

no setter, inherited

maxValueInFrame ↔ double?

Maximum value of this series in a visible range of the chart.

getter/setter pair, inherited

minValue → double

Min quote in a frame.

no setter, inherited

minValueInFrame ↔ double?

Minimum value of this series in a visible range of the chart.

getter/setter pair, inherited

offset → int

The offset of this indicator.

final

options → IndicatorOptions?

Indicator options

final

prevLastEntry ↔ IndexedEntry<Tick>?

A reference to the last element of the previous version of this DataSeries.

getter/setter pair, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

seriesPainter ↔ SeriesPainter<Series>?

Responsible for painting a frame of this series on the canvas.

getter/setter pair, inherited

style → ChartPaintingStyle?

The painting style of this Series.

final, inherited

visibleEntries → VisibleEntries<Tick>

Series visible entries

no setter, inherited

Methods

createPainter() → SeriesPainter<Series>?

Is called whenever series is created to create its seriesPainter as well.

inherited

createVirtualTick(int epoch, double quote) → Tick

Creates a virtual tick for crosshair display when cursor is outside data range. Each series type should implement this to return the appropriate tick type.

override

didUpdate(ChartData? oldData) → bool

Will be called by the chart when it was updated.

inherited

fillEntriesFromInput(covariant AbstractSingleIndicatorSeries oldSeries) → void

Fills the entries that are about to be painted based on input and oldSeries

override

getCrosshairDetailsBoxHeight() → double

Returns the height of the crosshair details box for this series type. Each series type should implement this to return the appropriate height.

override

getCrosshairDotPainter(ChartTheme theme) → CrosshairDotPainter

Returns a CrosshairDotPainter for painting a dot at the crosshair position. Each series type should implement this to return the appropriate dot painter.

override

getCrosshairHighlightPainter(Tick crosshairTick, double quoteToY(double p1), double xCenter, int granularity, double xFromEpoch(int p1), ChartTheme theme) → CrosshairHighlightPainter

Returns a CrosshairHighlightPainter for highlighting the element at the crosshair position. Each series type should implement this to return the appropriate highlight painter.

override

getCrossHairInfo(Tick crossHairTick, int pipSize, ChartTheme theme, CrosshairVariant crosshairVariant) → Widget

Each sub-class should implement and return appropriate cross-hair text based on its own requirements.

override

getEpochOf(Tick t, int index) → int

Gets the real epoch for the given t.

override

getMaxEpoch() → int?

Maximum epoch of this ChartData on the chart's X-Axis.

inherited

getMinEpoch() → int?

Minimum epoch of this ChartData on the chart's X-Axis.

inherited

getVisibleEntries(int startIndex, int endIndex) → VisibleEntries<Tick>

Creates visible entries based on startIndex and endIndex.

inherited

initialize() → void

Initializes entries from the input.

override

initializeIndicator() → CachedIndicator<Tick>

Initializes the _resultIndicator.

isOldDataAvailable(covariant AbstractSingleIndicatorSeries? oldSeries) → bool

Checks whether the old data of the series is available to use

override

maxValueOf(Tick t) → double

Maximum value in t.

override

minValueOf(Tick t) → double

Minimum value in t.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onTap(Offset localPosition) → bool

Called when this series' pane receives a tap at localPosition, in the same coordinate space as paint's size/canvas. Override to make a drawn region (e.g. a label) interactive. Returns true if the tap was handled by this series.

inherited

onUpdate(int leftEpoch, int rightEpoch) → void

Updates visible entries for this Series.

inherited

paint(Canvas canvas, Size size, EpochToX epochToX, QuoteToY quoteToY, AnimationInfo animationInfo, ChartConfig chartConfig, ChartTheme theme, ChartScaleModel chartScaleModel) → void

Paints seriesPainter's data on the canvas.

inherited

recalculateMinMax() → List<double>

Gets min and max quotes after updating visibleEntries as an array with two elements min, max.

inherited

resetLastEntryAnimation() → void

Use this to reset last tick in entries animation by setting prevLastEntry to null.

inherited

shouldRepaint(ChartData? oldDelegate) → bool

Checks if this ChartData needs to repaint with the chart widget's new frame.

inherited

toString() → String

A string representation of this object.

inherited

update(int leftEpoch, int rightEpoch) → void

Updates visible entries for this Series.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited