DefaultViewportManager

StockSharp.Xaml.Charting

The DefaultViewportManager performs a naive calculation for X and Y Axis VisibleRange. On each render of the parent UltrachartSurface, either autorange to fit the data (depending on the Axis.AutoRange property value), or return the original axis range (no change)

Inherits: ViewportManagerBase

Methods

OnCalculateNewXRange

protected override IRange OnCalculateNewXRange(IAxis xAxis)

result = defaultViewportManager.OnCalculateNewXRange(xAxis)

Overridden by derived types, called when the parent UltrachartSurface requests the XAxis VisibleRange. The Range returned by this method will be applied to the chart on render

xAxis: The XAxis

Returns: The new VisibleRange for the XAxis

OnCalculateNewYRange

protected override IRange OnCalculateNewYRange(IAxis yAxis, RenderPassInfo renderPassInfo)

result = defaultViewportManager.OnCalculateNewYRange(yAxis, renderPassInfo)

Overridden by derived types, called when the parent UltrachartSurface requests a YAxis VisibleRange. The Range returned by this method will be applied to the chart on render

yAxis: The YAxis
renderPassInfo

Returns: The new VisibleRange for the YAxis

OnParentSurfaceRendered

public override void OnParentSurfaceRendered(IUltrachartSurface ultraChartSurface)

defaultViewportManager.OnParentSurfaceRendered(ultraChartSurface)

Called when the IUltrachartSurface is rendered.

ultraChartSurface: The UltrachartSurface instance

OnVisibleRangeChanged

public override void OnVisibleRangeChanged(IAxis axis)

defaultViewportManager.OnVisibleRangeChanged(axis)

Called when the VisibleRange changes for an axis. Override in derived types to get a notification of this occurring

axis: The IAxisinstance