InkCollectorNewInAirPacketsEventArgs.PacketCount-Eigenschaft

Artikel
11/26/2008

Ruft die Anzahl der empfangenen In-Air-Pakete ab.

Namespace: Microsoft.Ink
Assembly: Microsoft.Ink (in Microsoft.Ink.dll)

Syntax

'Declaration
Public ReadOnly Property PacketCount As Integer
'Usage
Dim instance As InkCollectorNewInAirPacketsEventArgs
Dim value As Integer

value = instance.PacketCount

public int PacketCount { get; }

public:
property int PacketCount {
    int get ();
}

/** @property */
public int get_PacketCount()

public function get PacketCount () : int

Eigenschaftenwert

Typ: System.Int32
Die Anzahl der empfangenen In-Air-Pakete.

Hinweise

In-Air-Pakete werden empfangen, wenn ein Cursor-Objekt in den physischen Erfassungsbereich (die Nähe) des Tablettkontexts eintritt.

Beispiele

In diesem Beispiel ruft eine InkCollectorNewInAirPacketsEventHandler-Instanz den X-Wert und den Y-Wert des letzten über das InkCollectorNewInAirPacketsEventArgs-Objekt übergebenen Pakets ab. Der X-Wert und der Y-Wert befinden sich immer an den ersten zwei Positionen der Paketdaten.

Private Sub mInkObject_NewInAirPackets2(ByVal sender As Object, ByVal e As InkCollectorNewInAirPacketsEventArgs)
    Dim DescriptorsPerPacket As Integer = 0
    ' determine how many descriptors there are per packet
    ' you could also obtain this value using:
    '   e.PacketData.Length / e.PacketCount
    ' but if you need to know which particular properties
    ' are supported (beyond X and Y which are always placed first)
    ' you will need to query e.Cursor.Tablet.IsPacketPropertySupported()
    For Each G As Guid In mInkObject.DesiredPacketDescription
        If (e.Cursor.Tablet.IsPacketPropertySupported(G)) Then
            DescriptorsPerPacket += 1
        End If
    Next

    Dim LastX As Integer = e.PacketData(DescriptorsPerPacket * (e.PacketCount - 1))
    Dim LastY As Integer = e.PacketData((DescriptorsPerPacket * (e.PacketCount - 1)) + 1)
End Sub

private void mInkObject_NewInAirPackets2(object sender, InkCollectorNewInAirPacketsEventArgs e)
{
    int DescriptorsPerPacket = 0;
    // determine how many descriptors there are per packet
    // you could also obtain this value using:
    //   e.PacketData.Length / e.PacketCount
    // but if you need to know which particular properties
    // are supported (beyond X and Y which are always placed first)
    // you will need to query e.Cursor.Tablet.IsPacketPropertySupported()

    foreach (Guid G in mInkObject.DesiredPacketDescription)
    {
        if (e.Cursor.Tablet.IsPacketPropertySupported(G))
        {
            DescriptorsPerPacket++;
        }
    }

    int LastX = e.PacketData[DescriptorsPerPacket * (e.PacketCount - 1)];
    int LastY = e.PacketData[(DescriptorsPerPacket * (e.PacketCount - 1)) + 1];

}

Plattformen

Windows Vista

.NET Framework und .NET Compact Framework unterstützen nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen für .NET Framework.