处理RoutedEvent继续冒泡树 [英] Handled RoutedEvent continues to bubble up tree

问题描述

我正在开发一个 TreeView控件为基础的控制和我双击事件不断冒泡我的树型视图节点。

I'm developing a TreeView based control and my double click event continues to bubble up my TreeViewItem nodes.

我们的目标是让树型视图展开或当它被双击崩溃。

The goal is to have the TreeViewItem expand or collapse when it is double clicked.

我有一个适用的 MouseDoubleClick 事件每个事件处理程序的样式树型视图。

I have a style that applies an event handler for the MouseDoubleClick event to each TreeViewItem.

下面是处理该事件。

private void TreeViewItemDoubleClicked( object sender, RoutedEventArgs e )
{
    // Get the specific tree view item that was double clicked
    TreeViewItem treeViewItem = sender as TreeViewItem;

    // not null?
    if( null != treeViewItem )
    {
         // Switch expanded state
         if( true == treeViewItem.IsExpanded )
         {
             treeViewItem.IsExpanded = false;
         }
         else
         {
             treeViewItem.IsExpanded = true;
         }

         // Set event handled
         e.Handled = true; // [1]
    }
}

这为顶工作正常水平树型视图然而，当一个孩子被双击，事件冒泡树造成整支崩溃。为什么事件继续泡沫？由于注意到 [1] 我设置为已处理该事件。

This works fine for the top level TreeViewItem however when a child is double clicked, the event bubbles up the tree causing the entire branch to collapse. Why is the event continuing to bubble? As noted a [1] I'm setting the event as handled.

推荐答案

讨厌回答我的问题，但这里是我最终来到了使用该解决方案。

Hate answering my own questions but here is the solution that I ultimately came to use.

跨指定的MouseDoubleClick提高，以适应每个数源的后树型视图的分支（从小孩到根），无论如果事件处理利用我从这个问题的答案：

After coming across a few sources that specified that the MouseDoubleClick is raised for each TreeViewItem in the branch ( from child up to the root ) regardless if the event is handled I utilized the answer from this question:

的http://stackoverflow.com/questions/2941762/wpf-treeview-get-treeviewitem-in-previewmousedown-event

获得，这是鼠标事件下的树型视图。如果当前发送者等于鼠标事件的的TreeViewItem根据需要我展开/折叠。否则，我只是忽略事件，什么也不做。

to get the TreeViewItem that was under the mouse event. If the current sender is equal to the TreeViewItem of the mouse event I expand/collapse as required. Otherwise, I just ignore the event and do nothing.

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