feat: WindowElement.SetClosable()

Assets/Example/Runtime/RosettaUIExample.cs

@@ -34,7 +34,7 @@ private Element CreateElement()
         {
             return UI.Window(
                 ExampleTypes.Select(type => UI.WindowLauncher(null, false, false, false, type))
-            );
+            ).SetClosable(false);
         }
 
         void Update()

Packages/RosettaUI.UIToolkit/Runtime/Builder/ElementGroups/UIToolkitBuilderElementGroup_Window.cs

@@ -12,11 +12,13 @@ private bool Bind_Window(Element element, VisualElement visualElement)
             if (element is not WindowElement windowElement || visualElement is not Window window) return false;
 
             var titleBarLeft = window.TitleBarContainerLeft.Children().FirstOrDefault();
-            var bound = titleBarLeft != null && Bind(windowElement.Header, titleBarLeft);
-            if (!bound)
+            var successBind = titleBarLeft != null && Bind(windowElement.Header, titleBarLeft);
+            if (!successBind)
             {
                 window.TitleBarContainerLeft.Add(Build(windowElement.Header));
             }
+
+            window.Closable = windowElement.Closable;
 
             window.onShow += OnShow;
             window.onHide += OnHide;

Packages/RosettaUI/Runtime/Elements/ElementGroup/WindowElement.cs

@@ -0,0 +1,40 @@
+using System.Collections.Generic;
+using RosettaUI.Reactive;
+using UnityEngine;
+using UnityEngine.Assertions;
+
+namespace RosettaUI
+{
+    public class WindowElement : OpenCloseBaseElement
+    {
+        public readonly ReactiveProperty<Vector2?> positionRx = new();
+
+        private bool _closable = true;
+
+        public Vector2? Position
+        {
+            set => positionRx.Value = value;
+        }
+
+        public bool Closable
+        {
+            get => _closable;
+            set
+            {
+                if (_closable == value) return;
+                if (HasBuilt)
+                {
+                    Debug.LogWarning($"{nameof(WindowElement)}.{nameof(Closable)} is not applied after {nameof(RosettaUIRoot)}.{nameof(RosettaUIRoot.Build)}().");
+                }
+
+                _closable = value;
+            }
+        }
+
+        public override ReactiveProperty<bool> IsOpenRx => enableRx;
+
+        public WindowElement(Element header, IEnumerable<Element> contents) : base(header, contents)
+        {
+        }
+    }
+}

Packages/RosettaUI/Runtime/Elements/Utilities/ElementExtensionsMethodChain.cs

@@ -127,6 +127,12 @@ public static T Open<T>(this T element, bool recursive = false) where T : Elemen
         public static T Close<T>(this T element, bool recursive = false) where T : Element
             => element.SetOpenFlag(false);
 
+        public static WindowElement SetClosable(this WindowElement windowElement, bool closable)
+        {
+            windowElement.Closable = closable;
+            return windowElement;
+        }
+
         public static WindowElement SetPosition(this WindowElement windowElement, Vector2? position)
         {
             windowElement.Position = position;