c# WinForms Detect real visibility of TreeView

Question

I have a WinForms TreeView and a tree, built from custom node objects which inherits TreeNode the problem is that these nodes can be displayed in only one tree at the time. Now I have multiple controls with a TreeView that should display these nodes. How can I indicate that the treeView is displayed? I can catch the VisibleChanged event but I don't know how to detect if the TreeView is really visible (The visible property does not change!).

I know that one solution can be to wrap my data in TreeNode objects and not using inheritance from TreeNode. But I hope there is a faster solution.

Answer 1

How do you decide which treeview gets to display the items?

Generally, I don't think that's a good design at all. Better use an FeedTreeNode(MyObject o) and a suitable updater.