Anchor Panels

Anchor panels attach to docking panels position or content and are the base of the annotation support in Nevron Chart for .NET. All anchor panels derive directly or indirectly from the NAnchorPanel class.This class extends the NContentPanel class by adding the Anchor property accepting objects derived from the abstract NAnchor class. This allows you to separate the anchor panel from the content it's attached to.

Anchors

The following table lists the built-in anchors of the control:

Anchor Type	Description
NPanelAnchor	Allows you to attach to a specific location within a panel. For example 10 pixels away from the top of the legend.
NModelPointAnchor	Allows you to attach to a specific model coordinate in NChart panels.
NScalePointAnchor	Allows you to attach to a specific scale coordinate (defined by the current axis scaling).
NAxisAnchor	Allows you to attach to a specific axis value in scale coordinates.
NDataPointAnchor	Allows you to attach to a specific data point.
NPieDataPointAnchor	Allows you to attach to a specific data point of a pie chart.
NLegendDataItemAnchor	Allows you to attach to a specific legend data item.

The following code creates a rectangular callout panel and attaches is to the second data point of a bar series.

C#	Copy Code
NCartesianChart chart = (NCartesianChart)chartControl.Charts[0]; NBarSeries bar = (NBarSeries)chart.Series.Add(SeriesType.Bar); bar.Values.Add(10); bar.Values.Add(20); bar.Values.Add(30); NRectangularCallout rectangularCallout = new NRectangularCallout(); rectangularCallout.ArrowLength = new NLength(30, NRelativeUnit.ParentPercentage); rectangularCallout.FillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.FromArgb(125, Color.White), Color.FromArgb(125, Color.CadetBlue)); rectangularCallout.UseAutomaticSize = true; rectangularCallout.Orientation = 120; rectangularCallout.Anchor = new NDataPointAnchor(bar, 1, ContentAlignment.MiddleCenter, StringAlignment.Center); rectangularCallout.Text = "Rectangular callout attached \r\nto the second bar"; chartControl.Panels.Add(rectangularCallout); chartControl.Refresh();

Copy Code

NCartesianChart chart = (NCartesianChart)chartControl.Charts[0];
NBarSeries bar = (NBarSeries)chart.Series.Add(SeriesType.Bar);

bar.Values.Add(10);
bar.Values.Add(20);
bar.Values.Add(30);

NRectangularCallout rectangularCallout = new NRectangularCallout();
rectangularCallout.ArrowLength = new NLength(30, NRelativeUnit.ParentPercentage);
rectangularCallout.FillStyle = new NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.FromArgb(125, Color.White), Color.FromArgb(125, Color.CadetBlue));
rectangularCallout.UseAutomaticSize = true;
rectangularCallout.Orientation = 120;
rectangularCallout.Anchor = new NDataPointAnchor(bar, 1, ContentAlignment.MiddleCenter, StringAlignment.Center);
rectangularCallout.Text = "Rectangular callout attached \r\nto the second bar";
chartControl.Panels.Add(rectangularCallout);

chartControl.Refresh();

Visual Basic	Copy Code
Dim chart As NCartesianChart = chartControl.Charts(0) Dim bar As NBarSeries = chart.Series.Add(SeriesType.Bar) bar.Values.Add(10) bar.Values.Add(20) bar.Values.Add(30) Dim rectangularCallout As New NRectangularCallout rectangularCallout.ArrowLength = New NLength(30, NRelativeUnit.ParentPercentage) rectangularCallout.FillStyle = New NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.FromArgb(125, Color.White), Color.FromArgb(125, Color.CadetBlue)) rectangularCallout.UseAutomaticSize = True rectangularCallout.Orientation = 120 rectangularCallout.Anchor = New NDataPointAnchor(bar, 1, ContentAlignment.MiddleCenter, StringAlignment.Center) rectangularCallout.Text = "Rectangular callout attached " + Environment.NewLine + "to the second bar" chartControl.Panels.Add(rectangularCallout) chartControl.Refresh()

Visual Basic

Copy Code

Dim chart As NCartesianChart = chartControl.Charts(0)
Dim bar As NBarSeries = chart.Series.Add(SeriesType.Bar)

bar.Values.Add(10)
bar.Values.Add(20)
bar.Values.Add(30)

Dim rectangularCallout As New NRectangularCallout
rectangularCallout.ArrowLength = New NLength(30, NRelativeUnit.ParentPercentage)
rectangularCallout.FillStyle = New NGradientFillStyle(GradientStyle.Horizontal, GradientVariant.Variant1, Color.FromArgb(125, Color.White), Color.FromArgb(125, Color.CadetBlue))
rectangularCallout.UseAutomaticSize = True
rectangularCallout.Orientation = 120
rectangularCallout.Anchor = New NDataPointAnchor(bar, 1, ContentAlignment.MiddleCenter, StringAlignment.Center)
rectangularCallout.Text = "Rectangular callout attached " + Environment.NewLine + "to the second bar"
chartControl.Panels.Add(rectangularCallout)

chartControl.Refresh()

Related Examples

Windows Forms: Panels\Annotations\General

Windows Forms: Panels\Annotations\Anchor Panels - Mini Charts

Web Forms: Panels\Annotations\General

Web Forms: Panels\Annotations\Anchor Panels - Mini Charts