Proprietà InkCollectorNewInAirPacketsEventArgs.PacketCount

Articolo
10/29/2008

Aggiornamento: novembre 2007

Ottiene il numero di pacchetti in-air ricevuti.

Spazio dei nomi: Microsoft.Ink
Assembly: Microsoft.Ink (in Microsoft.Ink.dll)

Sintassi

'Dichiarazione
Public ReadOnly Property PacketCount As Integer
'Utilizzo
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

Valore proprietà

Tipo: System.Int32
Numero di pacchetti in-air ricevuti.

Note

I pacchetti in-air vengono ricevuti quando un oggetto Cursor immette l'intervallo di rilevamento fisico (prossimità) del contesto della tavoletta.

Esempi

In questo esempio, un'istanza InkCollectorNewInAirPacketsEventHandler ottiene i valori X e Y dell'ultimo pacchetto passato tramite l'oggetto InkCollectorNewInAirPacketsEventArgs. I valori X e Y si trovano sempre nelle prime due posizioni dei dati del pacchetto.

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];

}

Piattaforme

Windows Vista

.NET Framework e .NET Compact Framework non supportano tutte le versioni di ciascuna piattaforma. Per un elenco delle versioni supportate, vedere Requisiti di sistema di .NET Framework.