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PolarRenderer

Class

Coordinates drawing and hit testing for polar and radar chart areas.

Definition

Namespace:Telerik.WinControls.UI

Assembly:Telerik.WinControls.ChartView.dll

Syntax:

public class PolarRenderer : ChartRenderer, IChartRenderer

Inheritance: objectChartRendererPolarRenderer

Derived Classes: PolarD2DRenderer

Implements: IChartRenderer

Inherited Members ChartRenderer.MeasureText(string, object)ChartRenderer.MeasureRotatedLabels(string, object, double)ChartRenderer.Invalidate(object)ChartRenderer.GetDistanceBetweenPoints(PointF, PointF)ChartRenderer.ToRectangleF(RadRect)ChartRenderer.ToRectangle(RadRect)ChartRenderer.ToSizeF(RadSize)ChartRenderer.ToSize(RadSize)ChartRenderer.ToPoint(RadPoint)ChartRenderer.ToPointF(RadPoint)ChartRenderer.SurfaceChartRenderer.Graphics...

Constructors

PolarRenderer(PolarArea)

Creates a renderer for the specified polar area.

public PolarRenderer(PolarArea area)

Parameters:areaPolarArea

The polar area whose grid, series, annotations, and axes are rendered.

Properties

Area

PolarArea

Gets the polar area rendered by this instance.

public PolarArea Area { get; }

DrawParts

List<IDrawPart>

Gets the draw parts used to render the polar area.

protected List<IDrawPart> DrawParts { get; }

View

PolarArea

Gets the polar area rendered by this instance.

public PolarArea View { get; }

Methods

Draw(object)

May request layout for visible, unarranged series before drawing the area's draw parts.

public override void Draw(object context)

Parameters:contextobject

The drawing context supplied by the chart renderer.

Overrides: ChartRenderer.Draw(object)

GetPaintRectangle(PointF[])

Calculates the axis-aligned rectangle enclosing the specified points.

public virtual RectangleF GetPaintRectangle(PointF[] points)

Parameters:pointsPointF[]

The points whose bounds are calculated.

Returns:

RectangleF

The smallest axis-aligned rectangle that contains the points.

HitTest(int, int)

Returns the data point hit by the specified location, checking draw parts from front to back.

public override DataPoint HitTest(int x, int y)

Parameters:xint

The horizontal coordinate to test.

yint

The vertical coordinate to test.

Returns:

DataPoint

The hit data point, or null when no draw part contains the location.

Overrides: ChartRenderer.HitTest(int, int)

Initialize()

Rebuilds the draw-part sequence for the grid, annotations, series, labels, and axes.

protected override void Initialize()

Overrides: ChartRenderer.Initialize()