StylusPoint Structure
Assembly: PresentationCore (in presentationcore.dll)
XML Namespace: http://schemas.microsoft.com/winfx/2006/xaml/presentation
A StylusPoint collects data when a user inputs ink using the digitizer. Because the information that a digitizer reports differs depending on the manufacture, the properties within a StylusPoint can vary. To determine whether a property is in the StylusPoint, call the HasProperty method. The Description property contains a StylusPointDescription that specifies which properties are in the StylusPoint. All StylusPoint objects contain properties that specify the (x, y) coordinates and pressure.
The following example gets the property names and values for each StylusPoint in a StylusPointCollection. This example assumes that there is a TextBlock called packetOutput.
Private Sub WriteStylusPointValues(ByVal points As StylusPointCollection) Dim pointsDescription As StylusPointDescription = points.Description Dim properties As ReadOnlyCollection(Of StylusPointPropertyInfo) = _ pointsDescription.GetStylusPointProperties() ' Write the name and and value of each property in ' every stylus point. Dim packetWriter As New StringWriter() packetWriter.WriteLine("{0} stylus points", points.Count.ToString()) For Each stylusPoint As StylusPoint In points packetWriter.WriteLine("Stylus Point info") packetWriter.WriteLine("X: {0}", stylusPoint.X.ToString()) packetWriter.WriteLine("Y: {0}", stylusPoint.Y.ToString()) packetWriter.WriteLine("Pressure: {0}", stylusPoint.PressureFactor.ToString()) ' Get the property name and value for each StylusPoint. ' Note that this loop reports the X, Y, and pressure values differantly than ' getting their values above. For i As Integer = 0 To pointsDescription.PropertyCount - 1 Dim currentProperty As StylusPointProperty = properties(i) ' GetStylusPointPropertyName is defined below and returns the ' name of the property. packetWriter.Write("{0}: ", GetStylusPointPropertyName(currentProperty)) packetWriter.WriteLine(stylusPoint.GetPropertyValue(currentProperty).ToString()) Next i packetWriter.WriteLine() Next stylusPoint packetOutput.Text = packetWriter.ToString() End Sub 'WriteStylusPointValues ... ' Use reflection to get the name of currentProperty. Private Function GetStylusPointPropertyName(ByVal currentProperty As StylusPointProperty) As String Dim guid As Guid = currentProperty.Id ' Iterate through the StylusPointProperties to find the StylusPointProperty ' that matches currentProperty, then return the name. Dim theFieldInfo As FieldInfo For Each theFieldInfo In GetType(StylusPointProperties).GetFields() Dim pointProperty As StylusPointProperty = _ CType(theFieldInfo.GetValue(currentProperty), StylusPointProperty) If pointProperty.Id = guid Then Return theFieldInfo.Name End If Next theFieldInfo Return "Not found" End Function 'GetStylusPointPropertyName
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.