Feedback EditorWindow position not correct in CreateGUI

Using Unity 2021.3.5. Bit frustrating that in the method:

CreateGUI

the windows position is not up-to-date.

This makes it more complex than necessary to create split views, where the fixedPaneStartDimension is derived from the windows size.

example:

Code (CSharp):

1.  
2. class MyWindow : EditorWindow {
3.  
4.     void CreateGUI() {
5.  
6.         Debug.Log("Create GUI position width:" + position.width); //320
7.  
8.         var splitView = new TwoPaneSplitView(0, Mathf.Round(position.width * 0.7f), TwoPaneSplitViewOrientation.Horizontal);
9.  
10.         var v1 = new VisualElement();
11.         var v2 = new VisualElement();
12.  
13.         splitView.Add(v1);
14.         splitView.Add(v2);
15.  
16.         rootVisualElement.Add(splitView);
17.  
18.         void InitSplitViewSize(GeometryChangedEvent evt) {
19.  
20.             Debug.Log("After Geometry Changed position width: " + position.width); //1000
21.  
22.             splitView.fixedPaneInitialDimension = Mathf.Round(position.width * 0.7f);
23.             splitView.UnregisterCallback<GeometryChangedEvent>(InitSplitViewSize);
24.         }
25.  
26.         splitView.RegisterCallback<GeometryChangedEvent>(InitSplitViewSize);
27.     }
28. }
29.  

Is this expected?

 

Looks like the

CreateGUI

method is called too quickly.

Code (CSharp):

1. private static void Open() {
2.  
3.     Debug.Log("Open");
4.  
5.     MyWindow window = GetWindow<MyWindow>("MyWindow");
6.  
7.     Debug.Log("After Create: " + window.position.width); //1000
8.  
9.     window.minSize = new Vector2(300, 200);
10.  
11.     Debug.Log("After Set MinSize: " + window.position.width); //1000
12. }

outputs:

1. Open
2. Create GUI position width: 320
3. After Create: 1000
4. After Set Min Size: 1000
5. After Geometry Changed position width: 1000

Also worth noting, this only happens on the initial show of the window.
If the window is already open, CreateGUI gets the correct position up front