TextField ignore keyboard Up/Down Arrow key

TextFields process keys at core level. Same process as IMGUI TextFields. But you could potentially register for key events in your instance, listen to Up and Down keys and skip them, then stop propagation of the event:

Code (CSharp):

1. {
2.    ...
3.    TextField myTextField = ...;
4.     VisualElement myTextInput = myTextField.Q("unity-text-input");
5.     myTextInput.RegisterCallback<KeyDownEvent>(OnKeyDown);
6. }
7.  
8. private void OnKeyDown(KeyDownEvent e)
9. {
10.     if (e.keyCode == KeyCode.DownArrow || e.keyCode == KeyCode.UpArrow)
11.         e.StopPropagation(); // might need e.StopImmediatePropagation() if StopPropagation does not fit your needs
12. }

Let me know if that doesn't work.

 

Hmm. Deriving from TextField and overriding ExecuteDefaultActionAtTarget() may do the trick:

Code (CSharp):

1. public class MyTextField : TextField
2. {
3.     public override void ExecuteDefaultActionAtTarget(EventBase evt)
4.     {
5.         if (evt.eventTypeId == KeyDownEvent.TypeId()&&
6.             (e.keyCode == KeyCode.DownArrow ||
7.              e.keyCode == KeyCode.UpArrow))
8.         {
9.             e.PreventDefault();
10.             return;
11.         }
12.         base.ExecuteDefaultActionAtTarget(evt);
13.     }
14. }

 

Ok, last resort, Go back to the first solution I suggested (OnKeyDown on the TextInput), but add e.PreventDefault() before you exit:

Code (CSharp):

1. private void OnKeyDown(KeyDownEvent e)
2. {
3.     if (e.keyCode == KeyCode.DownArrow || e.keyCode == KeyCode.UpArrow) {
4.         e.PreventDefault();
5.         e.StopImmediatePropagation();
6. }

Fingers crossed.

 

Glad to hear it worked -- actually PreventDefault alone works in this specific case (w/ TextField) because all key event handling is done in the TextField's ExecuteDefaultActionAtTarget. Best practice in the future you would probably want to stop propagation as well you never know who is also actively listening to events.