SplineAreaSeries2D.LineTension Property

Gets or sets the line tension to be used when drawing splines of the SplineAreaSeries2D.

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 SplineAreaSeries2D is drawn in the same way as the AreaSeries2D.

Example

The following example demonstrates how to create a 2D Spline Area chart. To do this, it is necessary to assign the ChartControl.Diagram property to XYDiagram2D, and then add two SplineAreaSeries2D objects with points to the diagram’s Diagram.Series collection.

Also, this example shows how to specify AreaSeries2D.Transparency and SplineAreaSeries2D.LineTension properties and add a title 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="SplineAreaChart.MainWindow"
        Title="SplineAreaChart" Height="600" Width="700">
    <Grid>
        <dxc:ChartControl>
            <dxc:ChartControl.Diagram>
                <dxc:XYDiagram2D>
                    <dxc:XYDiagram2D.Series>
                        <dxc:SplineAreaSeries2D  DisplayName="2005"  LineTension="0.8"
                                                 Transparency="0.4"  MarkerSize="20"
                                                 MarkerVisible="True">
                            <dxc:SplineAreaSeries2D.Label>
                                <dxc:SeriesLabel Visible="True" ConnectorVisible="False"/>
                            </dxc:SplineAreaSeries2D.Label>
                            <dxc:SplineAreaSeries2D.Points>
                                <dxc:SeriesPoint Argument="ExxonMobil" Value="362.53" />
                                <dxc:SeriesPoint Argument="General Electric" Value="348.45" />
                                <dxc:SeriesPoint Argument="Microsoft" Value="279.02" />
                                <dxc:SeriesPoint Argument="Citigroup" Value="230.93" />
                                <dxc:SeriesPoint Argument="Royal Dutch Shell plc" Value="203.52" />
                                <dxc:SeriesPoint Argument="Procter &amp; Gamble" Value="197.12" />
                            </dxc:SplineAreaSeries2D.Points>
                        </dxc:SplineAreaSeries2D>
                        <dxc:SplineAreaSeries2D DisplayName="2004" LineTension="0.8"
                                                Transparency="0.4" MarkerSize="20"
                                                MarkerVisible="True">
                            <dxc:SplineAreaSeries2D.Label>
                                <dxc:SeriesLabel  Visible="True" ConnectorVisible="False"/>
                            </dxc:SplineAreaSeries2D.Label>
                            <dxc:SplineAreaSeries2D.Points>
                                <dxc:SeriesPoint Argument="ExxonMobil" Value="277.02" />
                                <dxc:SeriesPoint Argument="General Electric" Value="328.54" />
                                <dxc:SeriesPoint Argument="Microsoft" Value="297.02" />
                                <dxc:SeriesPoint Argument="Citigroup" Value="255.3" />
                                <dxc:SeriesPoint Argument="Royal Dutch Shell plc" Value="173.54" />
                                <dxc:SeriesPoint Argument="Procter &amp; Gamble" Value="131.89" />
                            </dxc:SplineAreaSeries2D.Points>
                        </dxc:SplineAreaSeries2D>
                    </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="Market value (billion US$)" />
                            </dxc:AxisY2D.Title>
                        </dxc:AxisY2D>
                    </dxc:XYDiagram2D.AxisY>
                </dxc:XYDiagram2D>
            </dxc:ChartControl.Diagram>
            <dxc:ChartControl.Titles>
                <dxc:Title Dock="Top" HorizontalAlignment="Center">Corporations with Highest Market Value</dxc:Title>
            </dxc:ChartControl.Titles>
        </dxc:ChartControl>
    </Grid>
</Window>