Hi

We have some code that we are porting to a UserControl that makes use of the Viewport3D object.  With the code in it's original state, the view port and it's content works as expected.  When the new UserControl (which is a direct copy of the code, just separated from other parts of the app) is put onto a DiagramCanvas as a node, mouse clicks do not reach the Viewport3D (clicks to other object work as expected, such as buttons / scrollbars etc).  Due to the nture of the project I can't post reproduction code, but is there anything you folks can think of that may effect it?

Many thanks


Paul

Hi Stoyan

Yes, I'd agree with that, but even clicking on one of the 3d object yeilds no click event when inside the node - is this what you would expect?

This is our test project:
https://mindfusion.eu/_samples/Viewport3DTest.zip

It just calls Debug.Write from the MouseDown handler.

Technically this just shows that the event bubbles correctly. You can handle it directly from the viewport if you wish: set the Viewport's Name attribute in the xaml, expose it as a property of the user control:

public Viewport3D Viewport
{
     get { return viewport; }
}

and change the uc.MouseDown += ... line to

uc.Viewport.MouseDown += (s, e) => { Debug.WriteLine(e.Source.GetType().ToString()); };

This displays "System.Windows.Controls.Viewport3D" in our test app.

I hope that helps,
Stoyan