This week's book giveaway is in the Other Languages forum. We're giving away four copies of Functional Reactive Programming and have Stephen Blackheath and Anthony Jones on-line! See this thread for details.
Now i want to hide many nodes at the same time according to some conditions(for example: Date, after a mouse click action on a calendar, some nodes in this tree should be hided), but not hiding just only one node and only after user selection. How can i do that? I thought, that i can't do that without "tree selection", But I hope i was wrong, there must be some solutions.