Spread WinForms 18
Spread Windows Forms 18 Product Documentation / Developer's Guide / Chart Control / Creating Charts / Creating Plot Types / Creating a Polar Plot
Creating a Polar Plot

You can create a polar plot chart using code or the designer. The following image shows a Polar Plot type chart.

ポーラチャートの例

For details on the API, see the PolarPlotArea class. The following classes are also available when creating Polar plot type charts:

In addition, value axes such as ruler lines, memory, and scale labels are set using the following classes.

Using Code

  1. Create a PolarPointSeries object that represents the data series for the circle chart and add the data.
  2. Use the PolarPlotArea class to create the plot area.
  3. Add the series to the plot area.
  4. Create a label and legend for the chart.
  5. Create a ChartModel object and add the plot area, label, and legend to the model.
  6. Create a chart and add the chart model to it.

Example

The following example demonstrates creating a polar point series chart.

C#
Copy Code 
FarPoint.Win.Chart.PolarPointSeries series0 = new FarPoint.Win.Chart.PolarPointSeries();
series0.SeriesName = "Series 0";
series0.XValues.Add(0.0);
series0.XValues.Add(45.0);
series0.XValues.Add(90.0);
series0.XValues.Add(180.0);
series0.XValues.Add(270.0);
series0.YValues.Add(1.0);
series0.YValues.Add(2.0);
series0.YValues.Add(3.0);
series0.YValues.Add(4.0);
series0.YValues.Add(5.0);
FarPoint.Win.Chart.PolarPointSeries series1 = new FarPoint.Win.Chart.PolarPointSeries();
series1.SeriesName = "Series 1";
series1.XValues.Add(0.0);
series1.XValues.Add(45.0);
series1.XValues.Add(90.0);
series1.XValues.Add(180.0);
series1.XValues.Add(270.0);
series1.YValues.Add(2.0);
series1.YValues.Add(3.0);
series1.YValues.Add(4.0);
series1.YValues.Add(5.0);
series1.YValues.Add(6.0);
FarPoint.Win.Chart.PolarPlotArea plotArea = new FarPoint.Win.Chart.PolarPlotArea();
plotArea.Location = new PointF(0.2f, 0.2f);
plotArea.Size = new SizeF(0.6f, 0.6f);
plotArea.Series.Add(series0);
plotArea.Series.Add(series1);
FarPoint.Win.Chart.LabelArea label = new FarPoint.Win.Chart.LabelArea();
label.Text = "Polar Point Chart";
label.Location = new PointF(0.5f, 0.02f);
label.AlignmentX = 0.5f;
label.AlignmentY = 0.0f;
FarPoint.Win.Chart.LegendArea legend = new FarPoint.Win.Chart.LegendArea();
legend.Location = new PointF(0.98f, 0.5f);
legend.AlignmentX = 1.0f;
legend.AlignmentY = 0.5f;
FarPoint.Win.Chart.ChartModel model = new FarPoint.Win.Chart.ChartModel();
model.LabelAreas.Add(label);
model.LegendAreas.Add(legend);
model.PlotAreas.Add(plotArea);
chart2DControl1.Model = model;
Visual Basic
Copy Code 
Dim series0 As New FarPoint.Win.Chart.PolarPointSeries()
series0.SeriesName = "Series 0"
series0.XValues.Add(0.0)
series0.XValues.Add(45.0)
series0.XValues.Add(90.0)
series0.XValues.Add(180.0)
series0.XValues.Add(270.0)
series0.YValues.Add(1.0)
series0.YValues.Add(2.0)
series0.YValues.Add(3.0)
series0.YValues.Add(4.0)
series0.YValues.Add(5.0)
Dim series1 As New FarPoint.Win.Chart.PolarPointSeries()
series1.SeriesName = "Series 1"
series1.XValues.Add(0.0)
series1.XValues.Add(45.0)
series1.XValues.Add(90.0)
series1.XValues.Add(180.0)
series1.XValues.Add(270.0)
series1.YValues.Add(2.0)
series1.YValues.Add(3.0)
series1.YValues.Add(4.0)
series1.YValues.Add(5.0)
series1.YValues.Add(6.0)
Dim plotArea As New FarPoint.Win.Chart.PolarPlotArea()
plotArea.Location = New PointF(0.2F, 0.2F)
plotArea.Size = New SizeF(0.6F, 0.6F)
plotArea.Series.Add(series0)
plotArea.Series.Add(series1)
Dim label As New FarPoint.Win.Chart.LabelArea()
label.Text = "Polar Point Chart"
label.Location = New PointF(0.5F, 0.02F)
label.AlignmentX = 0.5F
label.AlignmentY = 0F
Dim legend As New FarPoint.Win.Chart.LegendArea()
legend.Location = New PointF(0.98F, 0.5F)
legend.AlignmentX = 1.0F
legend.AlignmentY = 0.5F
Dim model As New FarPoint.Win.Chart.ChartModel()
model.LabelAreas.Add(label)
model.LegendAreas.Add(legend)
model.PlotAreas.Add(plotArea)
chart2DControl1.Model = model

Using the Chart designer

  1. Run Chart Designer.
  2. Select the target Chart Model from the tree menu on the left.
  3. Open the Plot Area Collection Editor from PlotAreas in the Other section of the property list on the right.
  4. Click the drop-down button to the right of the Add button.
  5. Select and add the PolarPlotArea and set each property as required.
For information on starting Chart Designer, refer to Chart Designer in the SPREAD Designer Guide.