This example creates a cross product object.

Visual Basic

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'''<!--This example creates a cross product object.--> Private Sub AnnCrossProductObject_AnnCrossProductObject(ByVal container As AnnContainer)    Dim crossProduct As AnnCrossProductObject = New AnnCrossProductObject()    crossProduct.Stroke = Brushes.Red    crossProduct.StrokeThickness = 1.0    crossProduct.FontFamily = New FontFamily("Arial")    crossProduct.FontSize = 10.0    crossProduct.FirstStartPoint = New System.Windows.Point(DirectCast(New LengthConverter().ConvertFrom("5in"), Double), DirectCast(New LengthConverter().ConvertFrom("5in"), Double))    crossProduct.FirstEndPoint = New System.Windows.Point(DirectCast(New LengthConverter().ConvertFrom("10in"), Double), DirectCast(New LengthConverter().ConvertFrom("10in"), Double))    ' make this cross product symmetrical    crossProduct.UpdateSecondPoints()    ' update the intersection point    crossProduct.UpdateIntersectionPoint()    crossProduct.MeasurementUnit = AnnUnit.Inch    crossProduct.TickMarksLength = DirectCast(New LengthConverter().ConvertFrom("0.25in"), Double)    crossProduct.ShowTickMarks = True    crossProduct.GaugeLength = DirectCast(New LengthConverter().ConvertFrom("1.0in"), Double)    crossProduct.ShowGauge = True    crossProduct.ShowLength = True    crossProduct.Precision = 2    container.Children.Add(crossProduct)    ' show the intersection point    MessageBox.Show(String.Format("Intersection point is at: {0}", crossProduct.IntersectionPoint)) End Sub

C#

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private void AnnCrossProductObject_AnnCrossProductObject(AnnContainer container)  {     AnnCrossProductObject crossProduct = new AnnCrossProductObject();     crossProduct.Stroke = Brushes.Red;     crossProduct.StrokeThickness = 1.0;     crossProduct.FontFamily = new FontFamily("Arial");     crossProduct.FontSize = 10.0;     crossProduct.FirstStartPoint = new Point((double)new LengthConverter().ConvertFrom("5in"), (double)new LengthConverter().ConvertFrom("5in"));     crossProduct.FirstEndPoint = new Point((double)new LengthConverter().ConvertFrom("10in"), (double)new LengthConverter().ConvertFrom("10in"));     // make this cross product symmetrical     crossProduct.UpdateSecondPoints();     // update the intersection point     crossProduct.UpdateIntersectionPoint();     crossProduct.MeasurementUnit = AnnUnit.Inch;     crossProduct.TickMarksLength = (double)new LengthConverter().ConvertFrom("0.25in");     crossProduct.ShowTickMarks = true;     crossProduct.GaugeLength = (double)new LengthConverter().ConvertFrom("1.0in");     crossProduct.ShowGauge = true;     crossProduct.ShowLength = true;     crossProduct.Precision = 2;     container.Children.Add(crossProduct);       // show the intersection point     MessageBox.Show(String.Format("Intersection point is at: {0}", crossProduct.IntersectionPoint));  }

XAML

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<Window x:Class="WPFSamples.AnnCrossProductObject" Title="Leadtools.Windows.Annotations" Height="600" Width="800" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Leadtools_Windows_Annotations="clr-namespace:Leadtools.Windows.Annotations;assembly=Leadtools.Windows.Annotations">    <Leadtools_Windows_Annotations:AnnCrossProductObject FirstStartPoint="5in,5in" FirstEndPoint="10in,5in" SecondStartPoint="7.5in,2.5in" SecondEndPoint="7.5in,7.5in" IntersectionPoint="7.5in,5in" MeasurementUnit="Inch" TickMarksLength="0.25in" ShowTickMarks="True" GaugeLength="1.0in" ShowGauge="True" ShowLength="True" Precision="0" Stroke="Red" StrokeThickness="1.0" FontFamily="Arial" FontSize="10.0" />  </Window>

The cross-product annotation object consists of two rulers intersecting at right angles. The intersection point of a cross product object updates dynamically and can be obtained through the IntersectionPoint property.

For more information about the crossproduct annotation object refer to AnnCrossProductObject for WPF. For more information about the automated crossproduct annotation object, refer to WPF Annotation Objects - Automated Features.

System.Object
   System.Windows.Threading.DispatcherObject
      System.Windows.DependencyObject
         System.Windows.Media.Visual
            System.Windows.UIElement
               System.Windows.FrameworkElement
                  Leadtools.Windows.Annotations.AnnObjectBase
                     Leadtools.Windows.Annotations.AnnCrossProductObject

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Vista, and Windows Server 2003 family

Reference