Working with RightImages on TreeNode

Hi Rick,

The image element doesn't have any context to allow you to get back to the collection.

So you have a couple of option. You could get the image from the element and then compare it to the images you are using and see if it matches. This assumes that you are using a single instance of the image for all of the nodes.

Another option would be to examine the Rect of the image element within it's parent and compare it to the other elements inside the same parent. Presumably, there is a NodeTextUIElement inside the parent. If the image element's rect is to the right of the NodeTextUIElement, you know you are dealing with an image in the RightImages collection. And if it's to the left, you know you are dealing with the LeftImages collection.

If you only have one image left and one image right, I'd probably recommend the latter approach.



        private void ultraTree1_MouseClick(object sender, MouseEventArgs e)
        {
            UltraTree tree = (UltraTree)sender;
            UIElement element = tree.UIElement.LastElementEntered;
            ImageUIElement imageUIElement = element as ImageUIElement;
            if (null != imageUIElement)
            {
                NodeSelectableAreaUIElement parent = element.Parent as NodeSelectableAreaUIElement;
                if (null != parent)
                {
                    NodeTextUIElement nodeTextUIElement = parent.GetDescendant(typeof(NodeTextUIElement)) as NodeTextUIElement;
                    if (null != nodeTextUIElement)
                    {
                        if (imageUIElement.Rect.Left > nodeTextUIElement.Rect.Left)
                            Debug.WriteLine("ImageRight");
                        else
                            Debug.WriteLine("ImageLeft");
                    }
                }
            }
        }