SplineAreaStackedSeries2D.LineTension Property

Gets or sets the line tension to be used when drawing splines of the SplineAreaStackedSeries2D.

Namespace: DevExpress.Xpf.Charts

Assembly: DevExpress.Xpf.Charts.v23.2.dll

NuGet Package: DevExpress.Wpf.Charts

Declaration

C#

public double LineTension { get; set; }

VB.NET

Public Property LineTension As Double

Property Value

Type	Description
Double	A double value specifying the line tension.

Remarks

Use the LineTension property to specify the “smoothness” of a spline curve. Note that if the LineTension property is set to 0, the SplineAreaStackedSeries2D is drawn in the same way as the AreaStackedSeries2D.

Example

The following example demonstrates how to create a 2D Stacked Spline Area chart. To do this, it is necessary to assign the ChartControl.Diagram property to XYDiagram2D, and then add three SplineAreaStackedSeries2D objects with points to the diagram’s Diagram.Series collection.

Also, this example shows how to specify AreaStackedSeries2D.Transparency and SplineAreaStackedSeries2D.LineTension properties and add a legend to a chart.

MainWindow.xaml

<Window
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
        x:Class="StackedSplineAreaChart.MainWindow"
        Title="Stacked Spline Area Chart" Height="600" Width="800">
    <Grid>
        <dxc:ChartControl>
            <dxc:ChartControl.Diagram>
                <dxc:XYDiagram2D>
                    <dxc:XYDiagram2D.Series>
                        <dxc:SplineAreaStackedSeries2D DisplayName="1998" LineTension="0.8"
                                                       Transparency="0.4">
                            <dxc:SplineAreaStackedSeries2D.Points>
                                <dxc:SeriesPoint Argument="Illinois" Value="423.721" />
                                <dxc:SeriesPoint Argument="Indiana" Value="178.719" />
                                <dxc:SeriesPoint Argument="Michigan" Value="308.845" />
                                <dxc:SeriesPoint Argument="Ohio" Value="348.555" />
                                <dxc:SeriesPoint Argument="Wisconsin" Value="160.274" />
                            </dxc:SplineAreaStackedSeries2D.Points>
                            <dxc:SplineAreaStackedSeries2D.Label>
                                <dxc:SeriesLabel Visible="True"  dxc:MarkerSeries2D.Angle="40" />
                            </dxc:SplineAreaStackedSeries2D.Label>
                        </dxc:SplineAreaStackedSeries2D>
                        <dxc:SplineAreaStackedSeries2D DisplayName="2001" LineTension="0.8"
                                                       Transparency="0.4">
                            <dxc:SplineAreaStackedSeries2D.Points>
                                <dxc:SeriesPoint Argument="Illinois" Value="476.851" />
                                <dxc:SeriesPoint Argument="Indiana" Value="195.769" />
                                <dxc:SeriesPoint Argument="Michigan" Value="335.793" />
                                <dxc:SeriesPoint Argument="Ohio" Value="374.771" />
                                <dxc:SeriesPoint Argument="Wisconsin" Value="182.373" />
                            </dxc:SplineAreaStackedSeries2D.Points>
                            <dxc:SplineAreaStackedSeries2D.Label>
                                <dxc:SeriesLabel Visible="True" dxc:MarkerSeries2D.Angle="40" />
                            </dxc:SplineAreaStackedSeries2D.Label>
                        </dxc:SplineAreaStackedSeries2D>
                        <dxc:SplineAreaStackedSeries2D DisplayName="2004" LineTension="0.8"
                                                       Transparency="0.4">
                            <dxc:SplineAreaStackedSeries2D.Points>
                                <dxc:SeriesPoint Argument="Illinois" Value="528.904" />
                                <dxc:SeriesPoint Argument="Indiana" Value="227.271" />
                                <dxc:SeriesPoint Argument="Michigan" Value="372.576" />
                                <dxc:SeriesPoint Argument="Ohio" Value="418.258" />
                                <dxc:SeriesPoint Argument="Wisconsin" Value="211.727" />
                            </dxc:SplineAreaStackedSeries2D.Points>
                            <dxc:SplineAreaStackedSeries2D.Label>
                                <dxc:SeriesLabel Visible="True" dxc:MarkerSeries2D.Angle="40" />
                            </dxc:SplineAreaStackedSeries2D.Label>
                        </dxc:SplineAreaStackedSeries2D>
                    </dxc:XYDiagram2D.Series>
                    <dxc:XYDiagram2D.AxisX>
                        <dxc:AxisX2D>
                            <dxc:AxisX2D.WholeRange>
                                <dxc:Range SideMarginsValue="0" />
                            </dxc:AxisX2D.WholeRange>
                        </dxc:AxisX2D>
                    </dxc:XYDiagram2D.AxisX>
                    <dxc:XYDiagram2D.AxisY>
                        <dxc:AxisY2D>
                            <dxc:AxisY2D.Title>
                                <dxc:AxisTitle Content="Millions of Dollars" />
                            </dxc:AxisY2D.Title>
                        </dxc:AxisY2D>
                    </dxc:XYDiagram2D.AxisY>
                </dxc:XYDiagram2D>
            </dxc:ChartControl.Diagram>
            <dxc:ChartControl.Legend>
                <dxc:Legend HorizontalPosition="Right" />
            </dxc:ChartControl.Legend>
            <dxc:ChartControl.Titles>
                <dxc:Title Dock="Top" HorizontalAlignment="Center">Great Lakes Gross State Product
                </dxc:Title>
            </dxc:ChartControl.Titles>
        </dxc:ChartControl>
    </Grid>
</Window>