WPF双击TreeviewItem子节点

Question

我在树视图中有一个树视图项,它将有一个绑定到它的列表:

        <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>

我无法弄清楚如何让每个孩子都有双击事件.

任何帮助表示赞赏.非常感谢.

Answer 1

<TreeView.ItemContainerStyle>
    <Style TargetType="{x:Type TreeViewItem}">
        <EventSetter Event="MouseDoubleClick" Handler="OnItemMouseDoubleClick" />
        ...

Answer 2

<TreeView.ItemContainerStyle>
    <Style TargetType="{x:Type TreeViewItem}">
        <EventSetter Event="MouseDoubleClick" Handler="OnItemMouseDoubleClick" />
        ...

然后,处理程序必须按如下方式编写,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.

    }

感谢Aurelien Ribon获得90%的奖励.双击问题似乎在Stack Exchange上的其他帖子中众所周知.只需将两个解决方案整合到一个答案中.

Answer 3

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;
    }