Stylus.PreviewStylusInAirMove Stylus.PreviewStylusInAirMove Stylus.PreviewStylusInAirMove Attached Event

定義

手寫筆在平板電腦的範圍內 (但未碰觸) 移動時發生。Occurs if the stylus moves while it is within range of (but not touching) the tablet.

see AddPreviewStylusInAirMoveHandler, and RemovePreviewStylusInAirMoveHandler
see AddPreviewStylusInAirMoveHandler, and RemovePreviewStylusInAirMoveHandler
see AddPreviewStylusInAirMoveHandler, and RemovePreviewStylusInAirMoveHandler

範例

下列範例示範如何判斷手寫筆所放置的元素。The following example demonstrates how to determine which element the stylus is positioned over. 這個範例假設有一個TextBox呼叫textBox1, 而且該PreviewStylusInAirMove事件已連接到事件處理常式。This example assumes that there is a TextBox called textBox1, and that the PreviewStylusInAirMove event is connected to the event handler.

void Window1_PreviewStylusInAirMove(object sender, StylusEventArgs e)
{
    textbox1.AppendText(Stylus.DirectlyOver.ToString() + "\n");
}
Private Sub Window1_PreviewStylusInAirMove(ByVal sender As Object, _
    ByVal e As StylusEventArgs) Handles Me.PreviewStylusInAirMove

    Dim element As Object
    element = CType(Stylus.DirectlyOver, Object)
    textbox1.AppendText(element.ToString() & vbLf)

End Sub

備註

這是附加事件。This is an attached event. WPFWPF將附加事件實作為路由事件。implements attached events as routed events. 附加事件基本上是一種XAMLXAML語言概念, 用來參考在不會定義事件的物件上處理的事件。An attached event is, fundamentally, a XAMLXAML language concept used to reference events that are handled on objects that do not, themselves, define events. WPFWPF進一步擴充附加事件的功能, 讓它能夠跨越路由。further expands an attached event's capabilities, allowing it to traverse a route. 附加事件在程式碼中沒有直接處理語法;若要在程式碼中附加路由事件的處理常式, 請使用指定的 Add * 處理常式方法。Attached events do not have a direct handling syntax in code; to attach handlers for a routed event in code, use a designated Add*Handler method. 如需詳細資訊, 請參閱附加事件總覽For details, see Attached Events Overview.

路由事件資訊Routed Event Information

識別碼欄位Identifier field PreviewStylusInAirMoveEvent
路由策略Routing strategy 建立Tunneling
Delegate - 委派Delegate StylusEventHandler

適用於

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