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Re: Restrict drag&drop to one level [message #26115 is a reply to message #26101]

Thu, 01 April 2010 23:59

dolik.rce
Messages: 1789
Registered: August 2008
Location: Czech Republic

Ultimate Contributor

It works almost perfect. I was missing the IsAvailableInternal<> function, that helps a lot Smile

But few problems still remain:

First, as I am using MultiSelect(), the level restriction fails when multiple levels are in selection. I solved this by adding following function as WhenSel callback:

void CheckSel(){
		Vector<int> sel=tree.GetSel();
		int last=sel.GetCount()-1;
		if (last<1) return;
		if (GetLevel(sel[0])!=GetLevel(sel[last]))
			tree.SelectOne(sel[last],false);
	}

It is not perfect solution, but works reasonably with minimal effort.

Another problem is, that if you drag data item to root (or anywhere below the tree), it disappears on drop. I think it is because it just slips through the restriction rules without triggering any of them, but I couldn't find how to prevent that. Confused

Any ideas?

Best regards,
Honza

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