Stylus.PreviewStylusInRange 附加事件

see AddPreviewStylusInRangeHandler, and RemovePreviewStylusInRangeHandler

see AddPreviewStylusInRangeHandler, and RemovePreviewStylusInRangeHandler

see AddPreviewStylusInRangeHandler, and RemovePreviewStylusInRangeHandler

示例

下面的示例演示如何确定触笔是否反转。The following example demonstrates how to determine whether the stylus is inverted. 此示例假定存在一个名为 TextBox 的 textBox1 ，该事件已 PreviewStylusInRange 连接到事件处理程序。This example assumes that there is a TextBox called textBox1 and that the PreviewStylusInRange event is connected to the event handlers.

void textbox1_PreviewStylusInRange(object sender, StylusEventArgs e)
{
    if (e.StylusDevice.Inverted)
    {
        textbox1.AppendText("Pen is inverted\n");
    }
    else
    {
        textbox1.AppendText("Pen is not inverted\n");
    }
}

Private Sub textbox1_PreviewStylusInRange(ByVal sender As Object, _
    ByVal e As StylusEventArgs) Handles textbox1.PreviewStylusInRange

    If e.StylusDevice.Inverted Then
        textbox1.AppendText("Pen is inverted" & vbLf)
    Else
        textbox1.AppendText("Pen is not inverted" & vbLf)
    End If

End Sub

注解

这是一个附加事件。This is an attached event. WPF 将附加事件作为路由事件实现。WPF implements attached events as routed events. 附加事件本质上是一种 XAML 语言概念，用于引用在不具有自身定义事件的对象上处理的事件。An attached event is, fundamentally, a XAML language concept used to reference events that are handled on objects that do not, themselves, define events. WPF 进一步扩展了附加事件的功能，从而允许它遍历路由。WPF 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	PreviewStylusInRangeEvent
路由策略Routing strategy	隧道Tunneling
委托Delegate	StylusEventHandler

适用于

另请参阅

• PreviewStylusInRange