Best method to find controls under a dropped usercontrol

Question

I'm trying to implement a drag-drop function to a usercontrol.

I've managed to get this working properly with the use of google, however, when dropping a control I wish to find every similar type controls that might be or might not be under it.

My current way would be check every control and see if it's under the dropped control. But I wonder if there is a better way, like a find control function which can check for controls within a given range?

I might be meaning walk through the logical tree if I were to know what the logical tree is. But it is as I said in my post. Iwant to find controls which are at the same coordinates of the application where I drop my control without having to check every single control. — Theun Arbeider, Jan 13 '12 at 15:26

score 1 · Accepted Answer · answered Jan 14 '12 at 22:27

you could use this function: http://msdn.microsoft.com/en-us/library/system.windows.media.visualtreehelper.findelementsinhostcoordinates%28v=vs.95%29.aspx

void xy_MouseMove(object sender, MouseEventArgs e)
    {
        if (m_IsDraging)
        {
            var res = VisualTreeHelper.FindElementsInHostCoordinates(e.GetPosition(null), elemenetWhichChildrenYouWantToCheck);
            //... check res for drop elements and react
        }
    }

Or you can just use this function only in MouseLeftButtonUp event

score 0 · Answer 2 · edited May 23 '17 at 10:24

0

Well..

First, the Logical Tree is the tree of sub-controls a control is made of.
Second, check this post

edited May 23 '17 at 10:24

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answered Jan 13 '12 at 15:53

NestorArturo

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Best method to find controls under a dropped usercontrol

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