displaying a canvas at two positions simultaneously

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In C#, using WPF components, Is it possible to display a canvas (whose contents change at run time based on user input) at two positions on the screen? or in two windows? So basically, whatever happens in the canvas positioned at one place happens in the canvas positioned in the other place.

Posted 18-May-12 3:30am

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Sergey Alexandrovich Kryukov 18-May-12 11:02am

Why won't you just try it? I would expect it failed. I know for sure that an attempt to make a reference to UIElement a child of two different instances of canvas throws exception; I would expect same thing for a single reference of a canvas added to two different parents. WPF tracks such things.
A weird request though. If you have only one canvas, why showing it in two different places? It would be confusing to say the least. I bet you can device better design.
--SA

[no name] 18-May-12 14:41pm

well it can't be contained by 2 paretns, but you might want to render same thing 2 times (like the windows 7 preview for example :) )

Sergey Alexandrovich Kryukov 28-May-12 19:16pm

Yes, I understand these two things are different. And yes, if you have the same picture rendered in different scale, or different pan, etc., it would make sense, I would agree.
Thank you for this important note.
--SA

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Shmuel Zang · Answer 1 · 2012-05-18T05:43:00

Solution 1

You can use a VisualBrush, for that purpose.

You can add a Rectangle and, set its Fill with a VisualBrush that contains your Canvas as its Visual.

Posted 18-May-12 5:43am

Shmuel Zang

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fct2004 19-May-12 14:59pm

This sounds like it might have a chance of working. I know you can't place the actual Canvas at multiple locations at once, because the visual tree will only allow it to have one parent. Yet, two images (not Images) of the Canvas and its contents, sounds like it might work. You might have a bit of trouble interacting with it on a GUI level.