How to have same object at different places of the VisualTree

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For a scheduler, I want to display several times the same object (listbox) at different places in a canvas.
For example, I need to display 10 times the same listbox. For the moment, I create 10 listboxes with the same ItemSource object.
It works fine, but when I add/remove items in my ItemSource object, It can be very slow.

I've tried to put the same listbox in several ContentPresenter, but I have an error "Object has a logical child of an other parent".

So how can I have same object in different place of the VisualTree?

Thanks for response.
Philippe

Posted 26-Mar-10 7:14am

Philippe MARINUTTI

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Christian Graus · Answer 1 · 2010-03-26T10:52:00

Solution 1

Philippe MARINUTTI wrote:
I've tried to put the same listbox in several ContentPresenter, but I have an error "Object has a logical child of an other parent".

So how can I have same object in different place of the VisualTree?

The error means what it says, and it means you cannot.

Posted 26-Mar-10 10:52am

Christian Graus

KenJohnson · Answer 2 · 2010-03-27T07:46:00

I do not think you can do this but you can cheat a bit this using the visual brush. If you want an example, I use that technique in my PolyStar - WPF Polygons and Stars article.
The article works with a graphic object but in your case you could probably have one real on that you move around to be the one that is being interacted with and the rest could just be rectangles. It is a bit of work but this is a high performance solution. I hope this helps.