I don't want to filter out hits on the expansion indicators, I just don't want double-clicking the expansion indicators to qualify the same as double-clicking the node text or node image. 

For example:  Right now, if a node is selected, and the user clicks any expansion indicator twice, quickly, the double-click event fires and my code runs as if they clicked a node.  This is very confusing for a user.

Can we please get a NodeDoubleClick event?  Seems logical to me that double-clicking a node is going to be the most common UI action for a treeview control...

Yes, they are. You could do something like this if you want to "filter out" hits on the expansion indicator:

void treeControl_MouseDown(object sender, MouseEventArgs e)
{
    UltraTree treeControl = sender as UltraTree;
    UIElement controlElement = treeControl.UIElement;
    UIElement elementAtPoint = controlElement != null ? controlElement.ElementFromPoint( e.Location ) : null;
    NodeSelectableAreaUIElement nodeElement = null;

    while ( elementAtPoint != null )
    {
        nodeElement = elementAtPoint as NodeSelectableAreaUIElement;
        if ( nodeElement != null )
            break;

        elementAtPoint = elementAtPoint.Parent;
    }

    if ( nodeElement != null )
    {
        UltraTreeNode node = nodeElement.Node;
    }
}

this code works for the most part.  doesn't take into consideration the expansion indicators.  if a node is selected, then you double click an expansion indicator, node will not be null, and my double-click event code will run...

I tried this as an alternative, and did the same thing:

UltraTreeNode aNode = this.HierarchyDataSetTree.GetNodeFromPoint(new Point(margs.X, margs.Y));

Yes, that did the trick!

I wasn't aware of the LastElementEntered property.

Thank you very much.
Jørn.

Hi Joesn,

     In that case, you are probably using the ActiveNode to get the node that was double-clicked. But that's not really a good idea, since the user could double-click on empty space in the tree or on an expansion indicator and you probably don't want to trigger at this point. 

    What I would do in DoubleClick is something like this:

    UltraTreeNode node = this.ultraTree1.UIElement.LastElementEntered.GetContext(typeof(UltraTreeNode)) as UltraTreeNode;

    if (node != null)

        // Do something

    This way you only respond if the last element the mouse entered is inside a node.