WinUI 3 TreeView - How to set selected node on right click

Question

I am trying to show a MenuFlyout on a WinUI 3 TreeView when the user right clicks on a node, and allow them to choose an action that applies to the node. Single node selection is in effect, and the node is not automatically selected on a right click.

After searching, I came across this answer, but it doesn't work with WinUI 3, because the WinUI 3 TreeView control does not have a GetNodeAt method, I don't see how to get a TreeViewNode from a point.

Any suggestions? Thanks.

Answer 1

You can use PointerPressed event.
A quick test with a TreeView from WinUI3 Gallery and a simple MenuFlyout from the TreeViewNode text, to be improved :

    private void Tv1_PointerPressed(object sender, PointerRoutedEventArgs e)  
    {  
        var properties = e.GetCurrentPoint((UIElement)sender).Properties;  
        if (properties.IsRightButtonPressed)  
        {  
            var dc = ((FrameworkElement)e.OriginalSource).DataContext;  
            MenuFlyout mf = new MenuFlyout();  
            MenuFlyoutItem mfi = new MenuFlyoutItem();  
            mfi.Text = ((TreeViewNode)dc).Content.ToString();  
            mf.Items.Add(mfi);  
            Microsoft.UI.Input.PointerPoint pp = e.GetCurrentPoint((UIElement)sender);  
            Point ptElement = new Point(pp.Position.X, pp.Position.Y);  
            mf.ShowAt((FrameworkElement)sender, ptElement);    
        }  
    }