How to get the position of a VisualElement?

How do I get the position of a VisualElement? I'm trying to get the position of elements in my OnFocus function and everything just returns 0s and NaNs?

 

post code

 

Trying to find the bounds of a group of VisualElements.

Code (CSharp):

1.  
2. float[] bounds = { float.MaxValue, float.MinValue, float.MaxValue, float.MinValue };
3. List<GraphElement> elements = graphElements.ToList();
4. for (int i = 0; i < elements.Count; i++)
5. {
6.     Rect elementRect = elements[i].GetPosition(); // elements[i].contentRect? elements[i].? elements[i].layout? elements[i].worldBound?
7.                    
8.     Debug.Log(elementRect.x.ToString() + " " + elementRect.y.ToString());
9.     float[] elementBounds = { elementRect.x, elementRect.x + elementRect.width, elementRect.y, elementRect.y + elementRect.height };
10.     if (elementBounds[0] < bounds[0])
11.         bounds[0] = elementBounds[0];
12.     if (elementBounds[1] > bounds[1])
13.         bounds[1] = elementBounds[1];
14.     if (elementBounds[2] < bounds[2])
15.         bounds[2] = elementBounds[2];
16.     if (elementBounds[3] > bounds[3])
17.         bounds[3] = elementBounds[3];
18.  }

 

Revisited this just now. Put a button in my UI and used it to check the state of the elements after OnFocus. It showed that VisualElements don't have any positional information until after OnFocus completes. Which is wildly inconvenient. Some more searching and I found this solution from damian:

myElement.scheduler.Execute(() => { // some work });

Which delays the function until after its info is ready. Then your initialization can take into consideration the positions of other elements.

 

could you explain this in a bit more detail? im running into the exact issue of getting either 0s or NaN as outputs and im really needing to be able to get the positions

 

I'm sure someone more qualified could explain the details better, but I believe that the UI Toolkit's Layout Engine requires one frame to calculate all the elements' positions whenever a change to the layout is made (like when the element is first created.)