Stylus.PreviewStylusUp 附加事件

定义

当用户将触笔从平板电脑上提起时发生。Occurs when the user lifts the stylus from the tablet.

see AddPreviewStylusUpHandler, and RemovePreviewStylusUpHandler
see AddPreviewStylusUpHandler, and RemovePreviewStylusUpHandler
see AddPreviewStylusUpHandler, and RemovePreviewStylusUpHandler

示例

下面的示例演示了当用户将触笔从平板电脑上提起时, 如何确定触笔的位置。The following example demonstrates how to determine the position of the stylus when the user lifts it from the tablet. 此示例假定存在一个TextBoxtextBox1为的, PreviewStylusUp该事件已连接到事件处理程序。This example assumes that there is a TextBox called textBox1 and that the PreviewStylusUp event is connected to the event handlers.

void textbox1_PreviewStylusUp(object sender, StylusEventArgs e)
{
    Point pos = e.GetPosition(textbox1);
    textbox1.AppendText("X: " + pos.X + " Y: " + pos.Y + "\n");
}
Private Sub textbox1_PreviewStylusUp(ByVal sender As Object, _
    ByVal e As StylusEventArgs) Handles textbox1.PreviewStylusUp

    Dim pos As Point = e.GetPosition(textbox1)
    textbox1.AppendText("X: " & pos.X & " Y: " & pos.Y & vbLf)

End Sub

注解

这是一个附加事件。This is an attached event. WPFWPF将附加事件作为路由事件实现。implements attached events as routed events. 附加事件本质上是一种XAMLXAML语言概念, 它用于引用处理的事件, 这些事件本身不是定义事件。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进一步扩展了附加事件的功能, 从而允许它遍历路由。further expands an attached event's capabilities, allowing it to traverse a route. 附加事件在代码中没有直接处理语法;若要在代码中附加路由事件的处理程序, 请使用指定的 Add * 处理程序方法。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. 有关详细信息, 请参阅附加事件概述For details, see Attached Events Overview.

路由事件信息Routed Event Information

标识符字段Identifier field PreviewStylusUpEvent
路由策略Routing strategy 建立Tunneling
委托Delegate StylusEventHandler

适用于

另请参阅