Undo changes not related to rebind sample extension.

Author: ekcoh

Packages/com.unity.inputsystem/InputSystem/Plugins/OnScreen/OnScreenControl.cs

@@ -203,8 +203,7 @@ protected void SendValueToControl<TValue>(TValue value)
             ////FIXME: this gives us a one-frame lag (use InputState.Change instead?)
             m_InputEventPtr.internalTime = InputRuntime.s_Instance.currentTime;
             control.WriteValueIntoEvent(value, m_InputEventPtr);
-            //InputSystem.QueueEvent(m_InputEventPtr);
-            InputState.Change(m_Control.m_Device, m_InputEventPtr);
+            InputSystem.QueueEvent(m_InputEventPtr);
         }
 
         protected void SentDefaultValueToControl()
@@ -347,4 +346,24 @@ internal string GetWarningMessage()
             return $"{GetType()} needs to be attached as a child to a UI Canvas and have a RectTransform component to function properly.";
         }
     }
+
+    internal static class UGUIOnScreenControlUtils
+    {
+        public static RectTransform GetCanvasRectTransform(Transform transform)
+        {
+            var parentTransform = transform.parent;
+            return parentTransform != null ? transform.parent.GetComponentInParent<RectTransform>() : null;
+        }
+    }
+
+#if UNITY_EDITOR
+    internal static class UGUIOnScreenControlEditorUtils
+    {
+        public static void ShowWarningIfNotPartOfCanvasHierarchy(OnScreenControl target)
+        {
+            if (UGUIOnScreenControlUtils.GetCanvasRectTransform(target.transform) == null)
+                UnityEditor.EditorGUILayout.HelpBox(target.GetWarningMessage(), UnityEditor.MessageType.Warning);
+        }
+    }
+#endif
 }