具有触摸惯性的WPF列表框拉下整个窗口 [英] WPF Listbox with touch inertia pulls down entire window

问题描述

我有一个为触摸显示器构建的全屏 WPF 应用程序，并且我在主屏幕上有一些 Listbox.

I have a full screen WPF application built for a touch monitor, and I have some Listboxs on the main screen.

当我轻弹列表框"时，它滚动正常，但是当它到达列表末尾时，整个应用程序从屏幕顶部拉下，我可以停止这种行为吗不知何故?

When I flick the 'Listbox' it scrolls fine, but when it gets to the end of the list, the entire application gets pulled down from the top of the screen, can I stop this behavior somehow?

还有其他人看过吗?

推荐答案

是的，ListBox 的默认行为(或者更确切地说，默认 ListBox 模板中的 ScrollViewer)是奇怪 - 当我第一次看到它，我想这一定是一个恶作剧.事实上，很难找到任何关于它的文档 - 但它被简要提及 这里:

Yes, that default behaviour of the ListBox (or rather, the ScrollViewer inside the default ListBox template) is weird - when I first came across it, I thought it must be a practical joke. In fact, it's really hard to find any documentation about it - but it is briefly mentioned here:

ManipulationBoundaryFeedback 事件使应用程序或组件能够在对象碰到边界时提供视觉反馈.例如，Window 类处理 ManipulationBoundaryFeedback 事件以使窗口在遇到其边缘时略微移动.

The ManipulationBoundaryFeedback event enables applications or components to provide visual feedback when an object hits a boundary. For example, the Window class handles the ManipulationBoundaryFeedback event to cause the window to slightly move when its edge is encountered.

因此，一种解决方法是处理 ListBox 上的 ManipulationBoundaryFeedback，并将 Handled 设置为 true:

So, a way around it is to handle ManipulationBoundaryFeedback on the ListBox, and set Handled to true:

<ListBox ManipulationBoundaryFeedback="OnManipulationBoundaryFeedback">            
  // ...
</ListBox>

代码隐藏:

private void OnManipulationBoundaryFeedback(object sender, ManipulationBoundaryFeedbackEventArgs e)
{
    e.Handled  = true;
}

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