Stylus.StylusButtonDown 附加事件

定義

使用者按下手寫筆上其中一個按鈕時發生。Occurs when the user presses one of the buttons on the stylus.

see AddStylusButtonDownHandler, and RemoveStylusButtonDownHandler
see AddStylusButtonDownHandler, and RemoveStylusButtonDownHandler
see AddStylusButtonDownHandler, and RemoveStylusButtonDownHandler

範例

下列範例示範當使用者按下手寫筆上的 [圓筒] 按鈕時, 如何顯示快捷方式功能表。The following example demonstrates how to show a shortcut menu when the user presses the barrel button on a stylus. 這個範例假設有一個TextBox呼叫textBox1的和ContextMenutextBoxContextMenu為的, 而且該StylusButtonDown事件已連接到事件處理常式。This example assumes that there is a TextBox called textBox1, and a ContextMenu called textBoxContextMenu, and that the StylusButtonDown event is connected to the event handler.

// Show or hide a shortcut menu when the user clicks the barrel button.
void textbox1_StylusButtonDown(object sender, StylusButtonEventArgs e)
{
    if (e.StylusButton.Guid != StylusPointProperties.BarrelButton.Id)
    {
        return;
    }

    if (textbox1.ContextMenu == null)
    {
        textbox1.ContextMenu = textBoxContextMenu;
    }
    else
    {
        textbox1.ContextMenu = null;
    }
}
' Show or hide a shortcut menu when the user clicks the barrel button.
Private Sub textbox1_StylusButtonDown(ByVal sender As Object, ByVal e As StylusButtonEventArgs) _
    Handles textbox1.StylusButtonDown

    If e.StylusButton.Guid <> StylusPointProperties.BarrelButton.Id Then
        Return
    End If

    If textbox1.ContextMenu Is Nothing Then
        textbox1.ContextMenu = textBoxContextMenu
    Else
        textbox1.ContextMenu = Nothing
    End If

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 StylusButtonDownEvent
路由策略Routing strategy 路由Bubbling
Delegate - 委派Delegate StylusButtonEventHandler

適用於

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