Axes in Windows Forms Smith Chart (SfSmithChart)

17 Feb 20258 minutes to read

Smith chart supports the following two axes for plotting:

  • Horizontal axis
  • Radial axis

Horizontal axis

Horizontal axis scale is used to plot the normalized resistance values on impedance Smith chart and normalized conductance values on admittance Smith chart.

The following topics explain the customization of horizontal axis.

Major gridlines customization

Visibility

Major gridlines visibility can be customized using the MajorGridlinesVisible property.

sfSmithChart1.HorizontalAxis.MajorGridlinesVisible = false;
sfSmithChart1.HorizontalAxis.MajorGridlinesVisible = False

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Style

Major gridlines style can be customized using the properties MajorGridlinesDashStyle, MajorGridlinesColor, MajorGridlinesWidth as you see in the below code snippet.

sfSmithChart1.HorizontalAxis.Style.MajorGridlinesDashStyle = System.Drawing.Drawing2D.DashStyle.Dash;

sfSmithChart1.HorizontalAxis.Style.MajorGridlinesColor = Color.Red;

sfSmithChart1.HorizontalAxis.Style.MajorGridlinesWidth = 1;
sfSmithChart1.HorizontalAxis.Style.MajorGridlinesDashStyle = System.Drawing.Drawing2D.DashStyle.Dash

sfSmithChart1.HorizontalAxis.Style.MajorGridlinesColor = Color.Red

sfSmithChart1.HorizontalAxis.Style.MajorGridlinesWidth = 1

Axes_images2

Minor gridlines customization

Visibility

By default, the minor gridlines are not added to axis. The visibility of the minor gridlines can be controlled by using the MinorGridlinesVisible property.

sfSmithChart1.HorizontalAxis.MinorGridlinesVisible = true;
sfSmithChart1.HorizontalAxis.MinorGridlinesVisible = True

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Style

Minor gridlines style can be customized by using the MinorGridlinesDashStyle, MinorGridlinesColor, MinorGridlinesWidth and MinorGridlinesCount properties as shown in the following code snippet.

sfSmithChart1.HorizontalAxis.MinorGridlinesVisible = true;

sfSmithChart1.HorizontalAxis.Style.MinorGridlinesDashStyle = System.Drawing.Drawing2D.DashStyle.Dash;

sfSmithChart1.HorizontalAxis.Style.MinorGridlinesColor = Color.Red;

sfSmithChart1.HorizontalAxis.Style.MinorGridlinesWidth = 1;

sfSmithChart1.HorizontalAxis.MinorGridlinesCount = 10;
sfSmithChart1.HorizontalAxis.MinorGridlinesVisible = True

sfSmithChart1.HorizontalAxis.Style.MinorGridlinesDashStyle = System.Drawing.Drawing2D.DashStyle.Dash

sfSmithChart1.HorizontalAxis.Style.MinorGridlinesColor = Color.Red

sfSmithChart1.HorizontalAxis.Style.MinorGridlinesWidth = 1

sfSmithChart1.HorizontalAxis.MinorGridlinesCount = 10

Axes_images13

Axis line

To customize the visibility and appearance of an axis line, use the AxisLineVisible, AxisLineDashStyle and AxisLineColor properties.

The following code snippet represents the axis line color customization.

sfSmithChart1.HorizontalAxis.Style.AxisLineColor = Color.Red;
sfSmithChart1.HorizontalAxis.Style.AxisLineColor = Color.Red

Axes_images4

Label Placement

The LabelPlacement property is used to position the axis label either inside or outside of the chart plotting area. By default, the labels are placed outside.

sfSmithChart1.HorizontalAxis.LabelPlacement = LabelPlacement.Inside;
sfSmithChart1.HorizontalAxis.LabelPlacement = LabelPlacement.Inside

Axes_images5

Label intersect action

When the axis labels overlap with each other based on the chart dimensions and label size, you can avoid the overlapping by using the LabelIntersectAction property. The default value of the LabelIntersectAction property is Hide.

sfSmithChart1.HorizontalAxis.LabelIntersectAction = LabelIntersectActions.Hide;
sfSmithChart1.HorizontalAxis.LabelIntersectAction = LabelIntersectActions.Hide

Axes_images6

Radial Axis

Radial axis scale is used to plot the normalized reactance values in impedance Smith chart and normalized susceptance values in admittance Smith chart.

Major gridlines customization

Visibility

Major gridlines visibility can be customized using the MajorGridlinesVisible property.

sfSmithChart1.RadialAxis.MajorGridlinesVisible = false;
sfSmithChart1.RadialAxis.MajorGridlinesVisible = False

Axes_images7

Style

Major gridlines style can be customized using the MajorGridlinesDashStyle, MajorGridlinesColor, MajorGridlinesWidth properties as shown in the following code snippet.

sfSmithChart1.RadialAxis.Style.MajorGridlinesDashStyle = System.Drawing.Drawing2D.DashStyle.Dash;

sfSmithChart1.RadialAxis.Style.MajorGridlinesColor = Color.Red;

sfSmithChart1.RadialAxis.Style.MajorGridlinesWidth = 1;
sfSmithChart1.RadialAxis.Style.MajorGridlinesDashStyle = System.Drawing.Drawing2D.DashStyle.Dash

sfSmithChart1.RadialAxis.Style.MajorGridlinesColor = Color.Red

sfSmithChart1.RadialAxis.Style.MajorGridlinesWidth = 1

Axes_images14

Minor gridlines customization

Visibility

Minor grid lines visibility can be customized using the MinorGridlinesVisible property .

sfSmithChart1.RadialAxis.MinorGridlinesVisible = true;
sfSmithChart1.RadialAxis.MinorGridlinesVisible = True

Axes_images8

Style

Minor gridlines style can be customized using the MinorGridlinesDashStyle, MinorGridlinesColor, MinorGridlinesWidth and MinorGridlinesCount properties as shown in the following code snippet.

sfSmithChart1.RadialAxis.MinorGridlinesVisible = true;

sfSmithChart1.RadialAxis.Style.MinorGridlinesColor = Color.PaleVioletRed;

sfSmithChart1.RadialAxis.Style.MinorGridlinesDashStyle = System.Drawing.Drawing2D.DashStyle.Dash;

sfSmithChart1.RadialAxis.Style.MinorGridlinesWidth = 1;

sfSmithChart1.RadialAxis.MinorGridlinesCount = 10;
sfSmithChart1.RadialAxis.MinorGridlinesVisible = True

sfSmithChart1.RadialAxis.Style.MinorGridlinesColor = Color.PaleVioletRed

sfSmithChart1.RadialAxis.Style.MinorGridlinesDashStyle = System.Drawing.Drawing2D.DashStyle.Dash

sfSmithChart1.RadialAxis.Style.MinorGridlinesWidth = 1

sfSmithChart1.RadialAxis.MinorGridlinesCount = 10

Axes_images15

Axis line

To customize the visibility and appearance of an axis line, use the AxisLineVisible, AxisLineDashStyle, AxisLineColor properties.

The following code snippet represents the axis line color customization.

sfSmithChart1.RadialAxis.Style.AxisLineColor = Color.Red;
sfSmithChart1.RadialAxis.Style.AxisLineColor = Color.Red

Axes_images9

Label Placement

The LabelPlacement property is used to position the axis label either inside or outside of the chart plotting area. By default, the labels are placed outside.

sfSmithChart1.RadialAxis.LabelPlacement = LabelPlacement.Inside;
sfSmithChart1.RadialAxis.LabelPlacement = LabelPlacement.Inside

Axes_images10

Label intersect action

When the axis labels overlap with each other based on the chart dimensions and label size, you can avoid overlapping by using the LabelIntersectAction property. The default value of the LabelIntersectAction property is Hide.

sfSmithChart1.RadialAxis.LabelIntersectAction = LabelIntersectActions.Hide;
sfSmithChart1.RadialAxis.LabelIntersectAction = LabelIntersectActions.Hide

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Events

LabelCreated : Occurs when the axis labels are created.

Supports for both the axes.

sfSmithChart1.RadialAxis.LabelCreated += RadialAxis_LabelCreated;

private void RadialAxis_LabelCreated(object sender, EventArgs e)

{

var axisLabel = e as ChartAxisLabelEventArgs;

if (axisLabel.Label.Text == "1")

axisLabel.Label.Text = "One";

}
Private sfSmithChart1.RadialAxis.LabelCreated += RadialAxis_LabelCreated

Private Sub RadialAxis_LabelCreated(ByVal sender As Object, ByVal e As EventArgs)

Dim axisLabel = TryCast(e, ChartAxisLabelEventArgs)

If axisLabel.Label.Text = "1" Then

axisLabel.Label.Text = "One"

End If

End Sub

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