ContentElement.OnPreviewTouchDown(TouchEventArgs) 方法

定義

提供 PreviewTouchDown 路由事件的類別處理,而這個事件會在觸控按下此項目時發生。Provides class handling for the PreviewTouchDown routed event that occurs when a touch presses this element.

protected public:
 virtual void OnPreviewTouchDown(System::Windows::Input::TouchEventArgs ^ e);
protected internal virtual void OnPreviewTouchDown (System.Windows.Input.TouchEventArgs e);
abstract member OnPreviewTouchDown : System.Windows.Input.TouchEventArgs -> unit
override this.OnPreviewTouchDown : System.Windows.Input.TouchEventArgs -> unit
Protected Friend Overridable Sub OnPreviewTouchDown (e As TouchEventArgs)

參數

e
TouchEventArgs

TouchEventArgs,其中包含事件資料。A TouchEventArgs that contains the event data.

備註

OnPreviewTouchDown 方法沒有預設的實值。The OnPreviewTouchDown method has no default implementation. 覆寫衍生類別中的 OnPreviewTouchDown,以處理 PreviewTouchDown 事件。Override OnPreviewTouchDown in a derived class to handle the PreviewTouchDown event. 請務必呼叫基類 ' OnPreviewTouchDown 方法,讓基類接收事件。Be sure to call the base class' OnPreviewTouchDown method so that base classes receive the event.

適用於