com.unity.uiwidgets/Tests/Editor/EditableTextWiget.cs

using Unity.UIWidgets.editor;
using Unity.UIWidgets.painting;
using Unity.UIWidgets.widgets;
using UnityEditor;
using UnityEngine;
using Color = Unity.UIWidgets.ui.Color;
namespace UIWidgets.Tests
{
    public class EditableTextWiget: EditorWindow
    {
        private WindowAdapter windowAdapter;

        private PaintingBinding paintingBinding;

        private Widget root;

        private Widget image;

        [MenuItem("UIWidgetsTests/EditableTextWidget")]
        public static void renderWidgets() {
            EditorWindow.GetWindow(typeof(EditableTextWiget));
        }

        private string txt = "Hello\n" +
                             "This is useful when you need to check if a certain key has been pressed - possibly with modifiers. The syntax for the key string\n" +
                             "asfsd \n" +
                             "P1:\n" +
                             "This is useful when you need to check if a certain key has been pressed - possibly with modifiers.The syntax for the key st\n" +
                             "\n" +
                             "\n" +
                             "\n" +
                             "\n" +
                             " sfsafd";
        EditableTextWiget() {
        }

        void OnGUI() {
            this.windowAdapter.OnGUI();
        }

        private void Update() {
            this.windowAdapter.Update();
        }

        private void OnEnable() {
            this.paintingBinding = new PaintingBinding(null);
            paintingBinding.initInstances();
            this.windowAdapter = new EditorWindowAdapter(this);
            this.windowAdapter.OnEnable();
            this.root = new Container(
                width: 200,
                height: 200,
                margin: EdgeInsets.all(30.0),
                padding: EdgeInsets.all(15.0),
                color: Color.fromARGB(255, 244, 190, 85),
                child: new EditableText(
                    maxLines: 100, 
                    controller: new TextEditingController(txt),
                    focusNode: new FocusNode(), 
                    style: new TextStyle(),
                    selectionColor: Color.fromARGB(255, 255, 0, 0),
                    cursorColor: Color.fromARGB(255, 0, 0, 0)
                )
            );
            this.windowAdapter.attachRootWidget(root);
            this.titleContent = new GUIContent("EditableTextWidget");
        }
        
        void OnDisable() {
            this.windowAdapter.OnDisable();
            this.windowAdapter = null;
        }
    }
}