[GUI] Fix for warning and missing close icon under Unity 2023

Author: Eideren

Plugins/Editor/Resources/GUI/WinBtnClose.png

@@ -151,7 +151,7 @@ static void OnEditModeSelectionSceneGUI()
 					buttonArea.y = 2;
 					buttonArea.height = 13;
 					buttonArea.width = 13;
-					if (GUI.Button(buttonArea, GUIContent.none, "WinBtnClose"))
+					if (GUI.Button(buttonArea, GUIContent.none, CSG_GUIStyleUtility.winBtnClose))
 						EditModeToolWindowSceneGUI.GetWindow();
 					TooltipUtility.SetToolTip(CSG_GUIStyleUtility.PopOutTooltip, buttonArea); 
 

Plugins/Editor/Resources/GUI/WinBtnClose.png.meta

@@ -60,7 +60,7 @@ public static void OnSceneGUI(Rect windowRect, EditModeClip tool)
 						buttonArea.y += 2;
 						buttonArea.height = 13;
 						buttonArea.width = 13;
-						if (GUI.Button(buttonArea, GUIContent.none, "WinBtnClose"))
+						if (GUI.Button(buttonArea, GUIContent.none, CSG_GUIStyleUtility.winBtnClose))
 							EditModeToolWindowSceneGUI.GetWindow();
 						TooltipUtility.SetToolTip(CSG_GUIStyleUtility.PopOutTooltip, buttonArea);
 

Plugins/Editor/Scripts/View/GUI/EditModeGUI/EditModeSelection.GUI.cs

@@ -47,7 +47,7 @@ public static void OnSceneGUI(Rect windowRect, EditModeMeshEdit tool)
 						buttonArea.y += 2;
 						buttonArea.height = 13;
 						buttonArea.width = 13;
-						if (GUI.Button(buttonArea, GUIContent.none, "WinBtnClose"))
+						if (GUI.Button(buttonArea, GUIContent.none, CSG_GUIStyleUtility.winBtnClose))
 							EditModeToolWindowSceneGUI.GetWindow();
 						TooltipUtility.SetToolTip(CSG_GUIStyleUtility.PopOutTooltip, buttonArea);
 

Plugins/Editor/Scripts/View/GUI/EditModeGUI/EditModes/EditMode.Clip.GUI.cs

@@ -48,7 +48,7 @@ public static bool OnSceneGUI(Rect windowRect, EditModeGenerate tool)
 						buttonArea.y += 2;
 						buttonArea.height = 13;
 						buttonArea.width = 13;
-						if (GUI.Button(buttonArea, GUIContent.none, "WinBtnClose"))
+						if (GUI.Button(buttonArea, GUIContent.none, CSG_GUIStyleUtility.winBtnClose))
 							EditModeToolWindowSceneGUI.GetWindow();
 						TooltipUtility.SetToolTip(CSG_GUIStyleUtility.PopOutTooltip, buttonArea);
 

Plugins/Editor/Scripts/View/GUI/EditModeGUI/EditModes/EditMode.Edit.GUI.cs

@@ -48,7 +48,7 @@ public static void OnSceneGUI(Rect windowRect, EditModePlace tool)
 						buttonArea.y += 2;
 						buttonArea.height = 13;
 						buttonArea.width = 13;
-						if (GUI.Button(buttonArea, GUIContent.none, "WinBtnClose"))
+						if (GUI.Button(buttonArea, GUIContent.none, CSG_GUIStyleUtility.winBtnClose))
 							EditModeToolWindowSceneGUI.GetWindow();
 						TooltipUtility.SetToolTip(CSG_GUIStyleUtility.PopOutTooltip, buttonArea);
 

Plugins/Editor/Scripts/View/GUI/EditModeGUI/EditModes/EditMode.Generate.GUI.cs

@@ -1083,7 +1083,7 @@ public static void OnSceneGUI(Rect windowRect, EditModeSurface tool)
 			buttonArea.y += 2;
 			buttonArea.height = 13;
 			buttonArea.width = 13;
-			if (GUI.Button(buttonArea, GUIContent.none, "WinBtnClose"))
+			if (GUI.Button(buttonArea, GUIContent.none, CSG_GUIStyleUtility.winBtnClose))
 				EditModeToolWindowSceneGUI.GetWindow();
 
 			TooltipUtility.SetToolTip(CSG_GUIStyleUtility.PopOutTooltip, buttonArea);

Plugins/Editor/Scripts/View/GUI/EditModeGUI/EditModes/EditMode.Place.GUI.cs

@@ -92,6 +92,8 @@ internal static class CSG_GUIStyleUtility
 
 		public static GUIStyle unpaddedWindow;
 
+        public static GUIStyle winBtnClose;
+
 		public static GUILayoutOption[] ContentEmpty = new GUILayoutOption[0];
 
 
@@ -364,6 +366,21 @@ public static void InitStyles()
 
 			selectionRectStyle = GetStyle("selectionRect");
 
+			winBtnClose = new GUIStyle(GUI.skin.verticalScrollbarUpButton);
+			winBtnClose.normal.background = Resources.Load<Texture2D>("GUI/WinBtnClose");
+			winBtnClose.onActive.background =
+			winBtnClose.onFocused.background =
+			winBtnClose.onNormal.background =
+			winBtnClose.onHover.background =
+			winBtnClose.hover.background =
+			winBtnClose.focused.background =
+			winBtnClose.active.background = null;
+			winBtnClose.fixedHeight = 16f;
+			winBtnClose.fixedWidth = 16f;
+			winBtnClose.overflow.bottom = 0;
+			winBtnClose.overflow.top = 0;
+			winBtnClose.overflow.right = 0;
+			winBtnClose.overflow.left = 0;
 
 			var redToolbarDropDown = GetStyle("toolbarDropDown");