WPF 双击 TreeviewItem 子节点
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原文地址: http://stackoverflow.com/questions/4295897/
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WPF Double Click TreeviewItem Child Node
提问by tcables
I have a treeview Item as such in a treeview that will have a list bound to it:
我在树视图中有一个树视图项，它将绑定一个列表：
<TreeViewItem Name="tviOffline" Foreground="Red" FontWeight="Bold"
Header="Offline">
<TreeViewItem.ItemTemplate>
<DataTemplate DataType="{x:Type local:Buddy}">
<StackPanel>
<TextBlock Text="{Binding Nick}" FontSize="10" Foreground="#8CFFD528" />
</StackPanel>
</DataTemplate>
</TreeViewItem.ItemTemplate>
</TreeViewItem>
I cannot figure out how to get each of its childs to have a double click event.
我不知道如何让它的每个孩子都有一个双击事件。
any help is appreciated. thanks much.
任何帮助表示赞赏。非常感谢。
回答by Aurelien Ribon
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<EventSetter Event="MouseDoubleClick" Handler="OnItemMouseDoubleClick" />
...
回答by Robin Davies
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<EventSetter Event="MouseDoubleClick" Handler="OnItemMouseDoubleClick" />
...
And THEN, the handler has to be written as follows in order to prevent the double-click from firing on successive parent TreeViewItems:
然后，必须按如下方式编写处理程序，以防止双击在连续的父 TreeViewItems 上触发：
private void OnItemMouseDoubleClick(object sender, MouseButtonEventArgs args)
{
if (sender is TreeViewItem)
{
if (!((TreeViewItem)sender).IsSelected)
{
return;
}
}
.... do stuff.
}
Thanks to Aurelien Ribon for getting 90% of the way there. The double-click problem seems to be well-known in other postings on Stack Exchange. Just consolidating both solutions into one answer.
感谢 Aurelien Ribon 完成了 90% 的工作。双击问题在 Stack Exchange 上的其他帖子中似乎是众所周知的。只需将两种解决方案合并为一个答案即可。
回答by ezolotko
This is the only way I managed to get it to work for all the cases:
这是我设法让它适用于所有情况的唯一方法：
void MyTreeView_PreviewMouseDoubleClick(object sender, MouseButtonEventArgs e)
{
var clickedItem = TryGetClickedItem(myTreeView, e);
if (clickedItem == null)
return;
e.Handled = true; // to cancel expanded/collapsed toggle
DoStuff(clickedItem);
}
TreeViewItem TryGetClickedItem(TreeView treeView, MouseButtonEventArgs e)
{
var hit = e.OriginalSource as DependencyObject;
while (hit != null && !(hit is TreeViewItem))
hit = VisualTreeHelper.GetParent(hit);
return hit as TreeViewItem;
}
