How do I set a VisualElement's content container in C# code?

Unity Engine
,
1

I’m creating a VisualElement that instantiates all of it’s child VisualElements in the C# code (it doesn’t have a UXML file). I know I can set the content container in UXML, but how do I do that in C#? There is a “contentContainer” property on the VisualElement, but it is read only.

2

visualElement.contentContainer is getter only, not quite sure what you mean by setting content container

3

Override the contentContainer property to point to a child element.
Then use hierarchy.Add() to attach the content container (and any other elements) to the parent.

class MyElement : VisualElement
{
  public new class UxmlFactory : UxmlFactory<MyElement> { }

  public override VisualElement contentContainer => _container;
  private VisualElement _container;

  public MyElement()
  {
    _container = new VisualElement();
    _container.name = "content-container";
    hierarchy.Add(_container);
  }
}
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