WPF: How to walk up the Visual Tree to find a Model3DGroup a clicked 3d-model is in?
I'm displaying a few 3D-models as Model3DGroups. They are surrounded by Viewport3D which catches MouseDown-events.
I want to determine which Model3DGroup (they all have names) was clicked. I'm starting with this:
Point location = e.GetPosition(karte.ZAM3DViewport3D);
HitTestResult hitResult = VisualTreeHelper.HitTest(karte.ZAM3DViewport3D, location);
if (hitResult != null )
{
Debug.WriteLine("BREAKPOINT");
// Hit the visual.
}
After hitting the breakpoint set at the WriteLine-command I'm looking at the local-view to find the right variable but can't find it. Can you help me out whi开发者_JS百科ch path I need to take to find the group, the modelvisual3d belongs to?
Here is a screenshot of the tree:
I did it by surrounding the Model3DGroup with a ModelUIElement3D.
<ModelUIElement3D MouseDown="ModelUIElement3D_MouseDown" x:Name="LogoMouseDown">
the MouseDown-function handles it this way:
private void ModelUIElement3D_MouseDown(object sender, MouseButtonEventArgs e)
{
if (sender == trololo)
{
RaiseModelClickEvent("auditorium");
}
else if (sender == LogoMouseDown)
{
RaiseModelClickEvent("logo");
}
}
You could use Linq to Visual Tree as it doesn't matter whether the named element you are looking for is Model3DGroup. It is just another Dependency Object (if I understand your question).
Check result's type and then LinqToVT to go up, retrieving it's XAML predecessor:
hitResult.VisualHit.GetType() == typeof(ModelVisual3D)
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