Merge branch 'neg-ui' into 'main'

Neg ui

See merge request negames/NegUtils!5

Editor/ComponentsAdditionalItems/CanvasScalerDefault.cs

@@ -0,0 +1,30 @@
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace NEG.Utils.Editor.ComponentsAdditionalItems
+{
+    public static class CanvasScalerDefault
+    {
+        [MenuItem("CONTEXT/CanvasScaler/Full HD horizontal", false, 2000)]
+        public static void SetFullHdHorizontal(MenuCommand command) => SetComponent(command, 1920, 1080);
+        [MenuItem("CONTEXT/CanvasScaler/Full HD vertical", false, 2000)]
+        public static void SetFullHdVertical(MenuCommand command) => SetComponent(command, 1080, 1920);
+        [MenuItem("CONTEXT/CanvasScaler/Full 2k horizontal", false, 2000)]
+        public static void Set2KHorizontal(MenuCommand command) => SetComponent(command, 2560, 1440 );
+        [MenuItem("CONTEXT/CanvasScaler/Full 2k vertical", false, 2000)]
+        public static void Set2KVertical(MenuCommand command) => SetComponent(command, 1440, 2560);
+        [MenuItem("CONTEXT/CanvasScaler/Full 4k horizontal", false, 2000)]
+        public static void Set4KHorizontal(MenuCommand command) => SetComponent(command, 3840, 2160);
+        [MenuItem("CONTEXT/CanvasScaler/Full 4k vertical", false, 2000)]
+        public static void Set4KVertical(MenuCommand command) => SetComponent(command, 2160, 3840);
+
+        private static void SetComponent(MenuCommand command, int width, int height)
+        {
+            var scaler = (CanvasScaler)command.context;
+            scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
+            scaler.matchWidthOrHeight = width > height ? 1f : 0f;
+            scaler.referenceResolution = new Vector2(width, height);
+        }
+    }
+}

Editor/ComponentsAdditionalItems/CanvasScalerDefault.cs.meta

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Editor/NEG.Utils.Editor.asmdef

@@ -0,0 +1,18 @@
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NEG.meta

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NEG/UI.meta

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+guid: bbdebf147b9a40b0bc94b6f710c7aa6b
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NEG/UI/Area.meta

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+guid: 853f6a7d0f224278afbb5457d0fb8bde
+timeCreated: 1670706939

NEG/UI/Area/IArea.cs

@@ -0,0 +1,9 @@
+using NEG.UI.WindowSlot;
+
+namespace NEG.UI.Area
+{
+    public interface IArea : ISlotsHolder, IUiElement
+    {
+        
+    }
+}

NEG/UI/Area/IArea.cs.meta

@@ -0,0 +1,3 @@
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+guid: f7cf5ef3a347e1c4b98411f4d564b988
+timeCreated: 1670690282

NEG/UI/IUiElement.cs

@@ -0,0 +1,11 @@
+namespace NEG.UI
+{
+    public interface IUiElement
+    {
+        /// <summary>
+        /// Sets only visible state of element
+        /// </summary>
+        /// <param name="setEnabled"></param>
+        void SetEnabled(bool setEnabled);
+    }
+}

NEG/UI/IUiElement.cs.meta

@@ -0,0 +1,3 @@
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+guid: 296bf6969a6347f8aea788a7bdd086af
+timeCreated: 1670693177

NEG/UI/NEG.UI.asmdef

@@ -0,0 +1,14 @@
+{
+    "name": "NEG.UI",
+    "rootNamespace": "",
+    "references": [],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

NEG/UI/NEG.UI.asmdef.meta

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+guid: 7361f1d9c43da6649923760766194746
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+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

NEG/UI/Popup.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 76fc21263637443ca8268859d4cb5378
+timeCreated: 1670707809

NEG/UI/Popup/DefaultPopupData.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+
+namespace NEG.UI.Popup
+{
+    public class DefaultPopupData : PopupData
+    {
+        private readonly IDefaultPopup defaultPopup;
+
+        private readonly string title;
+        private readonly string content;
+        private readonly List<(string, Action)> options;
+
+        public DefaultPopupData(IDefaultPopup popup, string title, string content, List<(string, Action)> options) : base(popup)
+        {
+            defaultPopup = popup;
+            this.title = title;
+            this.content = content;
+            this.options = options;
+        }
+
+        public override void Show()
+        {
+            defaultPopup.SetContent(title, content, options);
+            base.Show();
+        }
+    }
+}

NEG/UI/Popup/DefaultPopupData.cs.meta

@@ -0,0 +1,3 @@
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+guid: 372c6df9ec044cb3adc86c7776b2ef61
+timeCreated: 1672432934

NEG/UI/Popup/IDefaultPopup.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+
+namespace NEG.UI.Popup
+{
+    public interface IDefaultPopup : IPopup
+    {
+        /// <summary>
+        /// Sets content based on provided data.
+        /// </summary>
+        /// <param name="title">popup title</param>
+        /// <param name="content">popup content</param>
+        /// <param name="options">list of tuples (name, action on click), to set buttons. Do not pass here popup closing logic, implementing class should do it</param>
+        public void SetContent(string title, string content, List<(string name, Action action)> options);
+    }
+}

NEG/UI/Popup/IDefaultPopup.cs.meta

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+guid: 0a6d0871ada44d1d95bea6c8e8701769
+timeCreated: 1672153906

NEG/UI/Popup/IPopup.cs

@@ -0,0 +1,26 @@
+using JetBrains.Annotations;
+using System;
+
+namespace NEG.UI.Popup
+{
+    [PublicAPI]
+    public interface IPopup
+    {
+        /// <summary>
+        /// Event to fire when popup is closed
+        /// </summary>
+        event Action<PopupData> OnPopupClosed;
+
+        /// <summary>
+        /// Show popup
+        /// </summary>
+        /// <param name="data">data assigned to popup, used to give info that popup is closed</param>
+        public void Show(PopupData data);
+
+        /// <summary>
+        /// Close popup or mark as closed if not visible
+        /// </summary>
+        /// <param name="silent">if true hide visually, without firing callbacks to properly close</param>
+        void Close(bool silent = false);
+    }
+}

NEG/UI/Popup/IPopup.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 79767831e4324605974f3bb0bb5026fb
+timeCreated: 1670692499

NEG/UI/Popup/PopupData.cs

@@ -0,0 +1,50 @@
+using JetBrains.Annotations;
+using System;
+
+namespace NEG.UI.Popup
+{
+    [PublicAPI]
+    public class PopupData
+    {
+        /// <summary>
+        /// Event that is fired on closing popup.
+        /// </summary>
+        public event Action<PopupData> PopupClosedEvent
+        {
+            add => popup.OnPopupClosed += value;
+            remove => popup.OnPopupClosed -= value;
+        }
+
+        /// <summary>
+        /// Is this data is still valid. If set to false, popup will not show.
+        /// </summary>
+        public bool IsValid { get; protected set; }
+        
+        private readonly IPopup popup;
+
+        /// <summary>
+        /// PopupData constructor.
+        /// </summary>
+        /// <param name="popup">attached to this data, can be used by different data instances</param>
+        public PopupData(IPopup popup)
+        {
+            this.popup = popup;
+            IsValid = true;
+        }
+        
+        /// <summary>
+        /// Show popup and pass needed data.
+        /// </summary>
+        public virtual void Show() => popup.Show(this);
+        
+        /// <summary>
+        /// Hide popup. Close visuals without firing events;
+        /// </summary>
+        public virtual void Hide() => popup.Close(true);
+
+        /// <summary>
+        /// Invalidate popup, <see cref="UiManager"/> will automatically skip this popup
+        /// </summary>
+        public virtual void Invalidate() => IsValid = false;
+    }
+}

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NEG/UI/PriorityQueue.cs

@@ -0,0 +1,999 @@
+#nullable enable
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+
+namespace System.Collections.Generic
+{
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+// ported from:
+// https://github.com/dotnet/runtime/blob/main/src/libraries/System.Collections/src/System/Collections/Generic/PriorityQueue.cs
+    internal sealed class PriorityQueueDebugView<TElement, TPriority>
+    {
+        private readonly PriorityQueue<TElement, TPriority> _queue;
+        private readonly bool _sort;
+
+        public PriorityQueueDebugView(PriorityQueue<TElement, TPriority> queue)
+        {
+            ArgumentNullException.ThrowIfNull(queue);
+
+            _queue = queue;
+            _sort = true;
+        }
+
+        public PriorityQueueDebugView(PriorityQueue<TElement, TPriority>.UnorderedItemsCollection collection)
+        {
+            _queue = collection?._queue ?? throw new System.ArgumentNullException(nameof(collection));
+        }
+
+        [DebuggerBrowsable(DebuggerBrowsableState.RootHidden)]
+        public (TElement Element, TPriority Priority)[] Items
+        {
+            get
+            {
+                List<(TElement Element, TPriority Priority)> list = new(_queue.UnorderedItems);
+                if (_sort) list.Sort((i1, i2) => _queue.Comparer.Compare(i1.Priority, i2.Priority));
+
+                return list.ToArray();
+            }
+        }
+    }
+
+    [SuppressMessage("ReSharper", "InconsistentNaming")]
+    internal static class SR
+    {
+        internal const string ArgumentOutOfRange_NeedNonNegNum = "Non-negative number required.";
+        internal const string ArgumentOutOfRange_IndexMustBeLessOrEqual = "Index must be less or equal";
+        internal const string InvalidOperation_EmptyQueue = "The queue is empty.";
+        internal const string InvalidOperation_EnumFailedVersion = "Collection modified while iterating over it.";
+        internal const string Arg_NonZeroLowerBound = "Non-zero lower bound required.";
+        internal const string Arg_RankMultiDimNotSupported = "Multi-dimensional arrays not supported.";
+        internal const string Argument_InvalidArrayType = "Invalid array type.";
+        internal const string Argument_InvalidOffLen = "Invalid offset or length.";
+    }
+
+    internal static class ArgumentNullException
+    {
+        public static void ThrowIfNull(object o)
+        {
+            if (o == null)
+                throw new System.ArgumentNullException(); // hard to do it differently without C# 10's features
+        }
+    }
+
+    internal static class ArrayEx
+    {
+        internal const int MaxLength = int.MaxValue;
+    }
+
+    /// <summary>
+    ///     Internal helper functions for working with enumerables.
+    /// </summary>
+    internal static class EnumerableHelpers
+    {
+        /// <summary>Converts an enumerable to an array using the same logic as List{T}.</summary>
+        /// <param name="source">The enumerable to convert.</param>
+        /// <param name="length">The number of items stored in the resulting array, 0-indexed.</param>
+        /// <returns>
+        ///     The resulting array.  The length of the array may be greater than <paramref name="length" />,
+        ///     which is the actual number of elements in the array.
+        /// </returns>
+        internal static T[] ToArray<T>(IEnumerable<T> source, out int length)
+        {
+            if (source is ICollection<T> ic)
+            {
+                int count = ic.Count;
+                if (count != 0)
+                {
+                    // Allocate an array of the desired size, then copy the elements into it. Note that this has the same
+                    // issue regarding concurrency as other existing collections like List<T>. If the collection size
+                    // concurrently changes between the array allocation and the CopyTo, we could end up either getting an
+                    // exception from overrunning the array (if the size went up) or we could end up not filling as many
+                    // items as 'count' suggests (if the size went down).  This is only an issue for concurrent collections
+                    // that implement ICollection<T>, which as of .NET 4.6 is just ConcurrentDictionary<TKey, TValue>.
+                    var arr = new T[count];
+                    ic.CopyTo(arr, 0);
+                    length = count;
+                    return arr;
+                }
+            }
+            else
+            {
+                using (var en = source.GetEnumerator())
+                {
+                    if (en.MoveNext())
+                    {
+                        const int DefaultCapacity = 4;
+                        var arr = new T[DefaultCapacity];
+                        arr[0] = en.Current;
+                        int count = 1;
+
+                        while (en.MoveNext())
+                        {
+                            if (count == arr.Length)
+                            {
+                                // This is the same growth logic as in List<T>:
+                                // If the array is currently empty, we make it a default size.  Otherwise, we attempt to
+                                // double the size of the array.  Doubling will overflow once the size of the array reaches
+                                // 2^30, since doubling to 2^31 is 1 larger than Int32.MaxValue.  In that case, we instead
+                                // constrain the length to be Array.MaxLength (this overflow check works because of the
+                                // cast to uint).
+                                int newLength = count << 1;
+                                if ((uint)newLength > ArrayEx.MaxLength)
+                                    newLength = ArrayEx.MaxLength <= count ? count + 1 : ArrayEx.MaxLength;
+
+                                Array.Resize(ref arr, newLength);
+                            }
+
+                            arr[count++] = en.Current;
+                        }
+
+                        length = count;
+                        return arr;
+                    }
+                }
+            }
+
+            length = 0;
+            return Array.Empty<T>();
+        }
+    }
+
+    /// <summary>
+    ///     Represents a min priority queue.
+    /// </summary>
+    /// <typeparam name="TElement">Specifies the type of elements in the queue.</typeparam>
+    /// <typeparam name="TPriority">Specifies the type of priority associated with enqueued elements.</typeparam>
+    /// <remarks>
+    ///     Implements an array-backed quaternary min-heap. Each element is enqueued with an associated priority
+    ///     that determines the dequeue order: elements with the lowest priority get dequeued first.
+    /// </remarks>
+    [DebuggerDisplay("Count = {Count}")]
+    [DebuggerTypeProxy(typeof(PriorityQueueDebugView<,>))]
+    public class PriorityQueue<TElement, TPriority>
+    {
+        /// <summary>
+        ///     Specifies the arity of the d-ary heap, which here is quaternary.
+        ///     It is assumed that this value is a power of 2.
+        /// </summary>
+        private const int Arity = 4;
+
+        /// <summary>
+        ///     The binary logarithm of <see cref="Arity" />.
+        /// </summary>
+        private const int Log2Arity = 2;
+
+        /// <summary>
+        ///     Custom comparer used to order the heap.
+        /// </summary>
+        private readonly IComparer<TPriority>? _comparer;
+
+        /// <summary>
+        ///     Represents an implicit heap-ordered complete d-ary tree, stored as an array.
+        /// </summary>
+        private (TElement Element, TPriority Priority)[] _nodes;
+
+        /// <summary>
+        ///     The number of nodes in the heap.
+        /// </summary>
+        private int _size;
+
+        /// <summary>
+        ///     Lazily-initialized collection used to expose the contents of the queue.
+        /// </summary>
+        private UnorderedItemsCollection? _unorderedItems;
+
+        /// <summary>
+        ///     Version updated on mutation to help validate enumerators operate on a consistent state.
+        /// </summary>
+        private int _version;
+
+#if DEBUG
+        static PriorityQueue()
+        {
+            Debug.Assert(Log2Arity > 0 && Math.Pow(2, Log2Arity) == Arity);
+        }
+#endif
+
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="PriorityQueue{TElement, TPriority}" /> class.
+        /// </summary>
+        public PriorityQueue()
+        {
+            _nodes = Array.Empty<(TElement, TPriority)>();
+            _comparer = InitializeComparer(null);
+        }
+
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="PriorityQueue{TElement, TPriority}" /> class
+        ///     with the specified initial capacity.
+        /// </summary>
+        /// <param name="initialCapacity">Initial capacity to allocate in the underlying heap array.</param>
+        /// <exception cref="ArgumentOutOfRangeException">
+        ///     The specified <paramref name="initialCapacity" /> was negative.
+        /// </exception>
+        public PriorityQueue(int initialCapacity)
+            : this(initialCapacity, null)
+        {
+        }
+
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="PriorityQueue{TElement, TPriority}" /> class
+        ///     with the specified custom priority comparer.
+        /// </summary>
+        /// <param name="comparer">
+        ///     Custom comparer dictating the ordering of elements.
+        ///     Uses <see cref="Comparer{T}.Default" /> if the argument is <see langword="null" />.
+        /// </param>
+        public PriorityQueue(IComparer<TPriority>? comparer)
+        {
+            _nodes = Array.Empty<(TElement, TPriority)>();
+            _comparer = InitializeComparer(comparer);
+        }
+
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="PriorityQueue{TElement, TPriority}" /> class
+        ///     with the specified initial capacity and custom priority comparer.
+        /// </summary>
+        /// <param name="initialCapacity">Initial capacity to allocate in the underlying heap array.</param>
+        /// <param name="comparer">
+        ///     Custom comparer dictating the ordering of elements.
+        ///     Uses <see cref="Comparer{T}.Default" /> if the argument is <see langword="null" />.
+        /// </param>
+        /// <exception cref="ArgumentOutOfRangeException">
+        ///     The specified <paramref name="initialCapacity" /> was negative.
+        /// </exception>
+        public PriorityQueue(int initialCapacity, IComparer<TPriority>? comparer)
+        {
+            if (initialCapacity < 0)
+                throw new ArgumentOutOfRangeException(
+                    nameof(initialCapacity), initialCapacity, SR.ArgumentOutOfRange_NeedNonNegNum);
+
+            _nodes = new (TElement, TPriority)[initialCapacity];
+            _comparer = InitializeComparer(comparer);
+        }
+
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="PriorityQueue{TElement, TPriority}" /> class
+        ///     that is populated with the specified elements and priorities.
+        /// </summary>
+        /// <param name="items">The pairs of elements and priorities with which to populate the queue.</param>
+        /// <exception cref="ArgumentNullException">
+        ///     The specified <paramref name="items" /> argument was <see langword="null" />.
+        /// </exception>
+        /// <remarks>
+        ///     Constructs the heap using a heapify operation,
+        ///     which is generally faster than enqueuing individual elements sequentially.
+        /// </remarks>
+        public PriorityQueue(IEnumerable<(TElement Element, TPriority Priority)> items)
+            : this(items, null)
+        {
+        }
+
+        /// <summary>
+        ///     Initializes a new instance of the <see cref="PriorityQueue{TElement, TPriority}" /> class
+        ///     that is populated with the specified elements and priorities,
+        ///     and with the specified custom priority comparer.
+        /// </summary>
+        /// <param name="items">The pairs of elements and priorities with which to populate the queue.</param>
+        /// <param name="comparer">
+        ///     Custom comparer dictating the ordering of elements.
+        ///     Uses <see cref="Comparer{T}.Default" /> if the argument is <see langword="null" />.
+        /// </param>
+        /// <exception cref="ArgumentNullException">
+        ///     The specified <paramref name="items" /> argument was <see langword="null" />.
+        /// </exception>
+        /// <remarks>
+        ///     Constructs the heap using a heapify operation,
+        ///     which is generally faster than enqueuing individual elements sequentially.
+        /// </remarks>
+        public PriorityQueue(IEnumerable<(TElement Element, TPriority Priority)> items, IComparer<TPriority>? comparer)
+        {
+            ArgumentNullException.ThrowIfNull(items);
+
+            _nodes = EnumerableHelpers.ToArray(items, out _size);
+            _comparer = InitializeComparer(comparer);
+
+            if (_size > 1) Heapify();
+        }
+
+        /// <summary>
+        ///     Gets the number of elements contained in the <see cref="PriorityQueue{TElement, TPriority}" />.
+        /// </summary>
+        public int Count => _size;
+
+        /// <summary>
+        ///     Gets the priority comparer used by the <see cref="PriorityQueue{TElement, TPriority}" />.
+        /// </summary>
+        public IComparer<TPriority> Comparer => _comparer ?? Comparer<TPriority>.Default;
+
+        /// <summary>
+        ///     Gets a collection that enumerates the elements of the queue in an unordered manner.
+        /// </summary>
+        /// <remarks>
+        ///     The enumeration does not order items by priority, since that would require N * log(N) time and N space.
+        ///     Items are instead enumerated following the internal array heap layout.
+        /// </remarks>
+        public UnorderedItemsCollection UnorderedItems => _unorderedItems ??= new UnorderedItemsCollection(this);
+
+        /// <summary>
+        ///     Adds the specified element with associated priority to the <see cref="PriorityQueue{TElement, TPriority}" />.
+        /// </summary>
+        /// <param name="element">The element to add to the <see cref="PriorityQueue{TElement, TPriority}" />.</param>
+        /// <param name="priority">The priority with which to associate the new element.</param>
+        public void Enqueue(TElement element, TPriority priority)
+        {
+            // Virtually add the node at the end of the underlying array.
+            // Note that the node being enqueued does not need to be physically placed
+            // there at this point, as such an assignment would be redundant.
+
+            int currentSize = _size++;
+            _version++;
+
+            if (_nodes.Length == currentSize) Grow(currentSize + 1);
+
+            if (_comparer == null)
+                MoveUpDefaultComparer((element, priority), currentSize);
+            else
+                MoveUpCustomComparer((element, priority), currentSize);
+        }
+
+        /// <summary>
+        ///     Returns the minimal element from the <see cref="PriorityQueue{TElement, TPriority}" /> without removing it.
+        /// </summary>
+        /// <exception cref="InvalidOperationException">The <see cref="PriorityQueue{TElement, TPriority}" /> is empty.</exception>
+        /// <returns>The minimal element of the <see cref="PriorityQueue{TElement, TPriority}" />.</returns>
+        public TElement Peek()
+        {
+            if (_size == 0) throw new InvalidOperationException(SR.InvalidOperation_EmptyQueue);
+
+            return _nodes[0].Element;
+        }
+
+        /// <summary>
+        ///     Removes and returns the minimal element from the <see cref="PriorityQueue{TElement, TPriority}" />.
+        /// </summary>
+        /// <exception cref="InvalidOperationException">The queue is empty.</exception>
+        /// <returns>The minimal element of the <see cref="PriorityQueue{TElement, TPriority}" />.</returns>
+        public TElement Dequeue()
+        {
+            if (_size == 0) throw new InvalidOperationException(SR.InvalidOperation_EmptyQueue);
+
+            var element = _nodes[0].Element;
+            RemoveRootNode();
+            return element;
+        }
+
+        /// <summary>
+        ///     Removes the minimal element from the <see cref="PriorityQueue{TElement, TPriority}" />,
+        ///     and copies it to the <paramref name="element" /> parameter,
+        ///     and its associated priority to the <paramref name="priority" /> parameter.
+        /// </summary>
+        /// <param name="element">The removed element.</param>
+        /// <param name="priority">The priority associated with the removed element.</param>
+        /// <returns>
+        ///     <see langword="true" /> if the element is successfully removed;
+        ///     <see langword="false" /> if the <see cref="PriorityQueue{TElement, TPriority}" /> is empty.
+        /// </returns>
+        public bool TryDequeue([MaybeNullWhen(false)] out TElement element,
+            [MaybeNullWhen(false)] out TPriority priority)
+        {
+            if (_size != 0)
+            {
+                (element, priority) = _nodes[0];
+                RemoveRootNode();
+                return true;
+            }
+
+            element = default;
+            priority = default;
+            return false;
+        }
+
+        /// <summary>
+        ///     Returns a value that indicates whether there is a minimal element in the
+        ///     <see cref="PriorityQueue{TElement, TPriority}" />,
+        ///     and if one is present, copies it to the <paramref name="element" /> parameter,
+        ///     and its associated priority to the <paramref name="priority" /> parameter.
+        ///     The element is not removed from the <see cref="PriorityQueue{TElement, TPriority}" />.
+        /// </summary>
+        /// <param name="element">The minimal element in the queue.</param>
+        /// <param name="priority">The priority associated with the minimal element.</param>
+        /// <returns>
+        ///     <see langword="true" /> if there is a minimal element;
+        ///     <see langword="false" /> if the <see cref="PriorityQueue{TElement, TPriority}" /> is empty.
+        /// </returns>
+        public bool TryPeek([MaybeNullWhen(false)] out TElement element,
+            [MaybeNullWhen(false)] out TPriority priority)
+        {
+            if (_size != 0)
+            {
+                (element, priority) = _nodes[0];
+                return true;
+            }
+
+            element = default;
+            priority = default;
+            return false;
+        }
+
+        /// <summary>
+        ///     Adds the specified element with associated priority to the <see cref="PriorityQueue{TElement, TPriority}" />,
+        ///     and immediately removes the minimal element, returning the result.
+        /// </summary>
+        /// <param name="element">The element to add to the <see cref="PriorityQueue{TElement, TPriority}" />.</param>
+        /// <param name="priority">The priority with which to associate the new element.</param>
+        /// <returns>The minimal element removed after the enqueue operation.</returns>
+        /// <remarks>
+        ///     Implements an insert-then-extract heap operation that is generally more efficient
+        ///     than sequencing Enqueue and Dequeue operations: in the worst case scenario only one
+        ///     shift-down operation is required.
+        /// </remarks>
+        public TElement EnqueueDequeue(TElement element, TPriority priority)
+        {
+            if (_size != 0)
+            {
+                var root = _nodes[0];
+
+                if (_comparer == null)
+                {
+                    if (Comparer<TPriority>.Default.Compare(priority, root.Priority) > 0)
+                    {
+                        MoveDownDefaultComparer((element, priority), 0);
+                        _version++;
+                        return root.Element;
+                    }
+                }
+                else
+                {
+                    if (_comparer.Compare(priority, root.Priority) > 0)
+                    {
+                        MoveDownCustomComparer((element, priority), 0);
+                        _version++;
+                        return root.Element;
+                    }
+                }
+            }
+
+            return element;
+        }
+
+        /// <summary>
+        ///     Enqueues a sequence of element/priority pairs to the <see cref="PriorityQueue{TElement, TPriority}" />.
+        /// </summary>
+        /// <param name="items">The pairs of elements and priorities to add to the queue.</param>
+        /// <exception cref="ArgumentNullException">
+        ///     The specified <paramref name="items" /> argument was <see langword="null" />.
+        /// </exception>
+        public void EnqueueRange(IEnumerable<(TElement Element, TPriority Priority)> items)
+        {
+            ArgumentNullException.ThrowIfNull(items);
+
+            int count = 0;
+            var collection =
+                items as ICollection<(TElement Element, TPriority Priority)>;
+            if (collection is not null && (count = collection.Count) > _nodes.Length - _size) Grow(_size + count);
+
+            if (_size == 0)
+            {
+                // build using Heapify() if the queue is empty.
+
+                if (collection is not null)
+                {
+                    collection.CopyTo(_nodes, 0);
+                    _size = count;
+                }
+                else
+                {
+                    int i = 0;
+                    (TElement, TPriority)[] nodes = _nodes;
+                    foreach ((var element, var priority) in items)
+                    {
+                        if (nodes.Length == i)
+                        {
+                            Grow(i + 1);
+                            nodes = _nodes;
+                        }
+
+                        nodes[i++] = (element, priority);
+                    }
+
+                    _size = i;
+                }
+
+                _version++;
+
+                if (_size > 1) Heapify();
+            }
+            else
+            {
+                foreach ((var element, var priority) in items) Enqueue(element, priority);
+            }
+        }
+
+        /// <summary>
+        ///     Enqueues a sequence of elements pairs to the <see cref="PriorityQueue{TElement, TPriority}" />,
+        ///     all associated with the specified priority.
+        /// </summary>
+        /// <param name="elements">The elements to add to the queue.</param>
+        /// <param name="priority">The priority to associate with the new elements.</param>
+        /// <exception cref="ArgumentNullException">
+        ///     The specified <paramref name="elements" /> argument was <see langword="null" />.
+        /// </exception>
+        public void EnqueueRange(IEnumerable<TElement> elements, TPriority priority)
+        {
+            ArgumentNullException.ThrowIfNull(elements);
+
+            int count;
+            if (elements is ICollection<(TElement Element, TPriority Priority)> collection &&
+                (count = collection.Count) > _nodes.Length - _size)
+                Grow(_size + count);
+
+            if (_size == 0)
+            {
+                // build using Heapify() if the queue is empty.
+
+                int i = 0;
+                (TElement, TPriority)[] nodes = _nodes;
+                foreach (var element in elements)
+                {
+                    if (nodes.Length == i)
+                    {
+                        Grow(i + 1);
+                        nodes = _nodes;
+                    }
+
+                    nodes[i++] = (element, priority);
+                }
+
+                _size = i;
+                _version++;
+
+                if (i > 1) Heapify();
+            }
+            else
+            {
+                foreach (var element in elements) Enqueue(element, priority);
+            }
+        }
+
+        /// <summary>
+        ///     Removes all items from the <see cref="PriorityQueue{TElement, TPriority}" />.
+        /// </summary>
+        public void Clear()
+        {
+            if (RuntimeHelpers.IsReferenceOrContainsReferences<(TElement, TPriority)>())
+                // Clear the elements so that the gc can reclaim the references
+                Array.Clear(_nodes, 0, _size);
+
+            _size = 0;
+            _version++;
+        }
+
+        /// <summary>
+        ///     Ensures that the <see cref="PriorityQueue{TElement, TPriority}" /> can hold up to
+        ///     <paramref name="capacity" /> items without further expansion of its backing storage.
+        /// </summary>
+        /// <param name="capacity">The minimum capacity to be used.</param>
+        /// <exception cref="ArgumentOutOfRangeException">
+        ///     The specified <paramref name="capacity" /> is negative.
+        /// </exception>
+        /// <returns>The current capacity of the <see cref="PriorityQueue{TElement, TPriority}" />.</returns>
+        public int EnsureCapacity(int capacity)
+        {
+            if (capacity < 0)
+                throw new ArgumentOutOfRangeException(nameof(capacity), capacity, SR.ArgumentOutOfRange_NeedNonNegNum);
+
+            if (_nodes.Length < capacity)
+            {
+                Grow(capacity);
+                _version++;
+            }
+
+            return _nodes.Length;
+        }
+
+        /// <summary>
+        ///     Sets the capacity to the actual number of items in the <see cref="PriorityQueue{TElement, TPriority}" />,
+        ///     if that is less than 90 percent of current capacity.
+        /// </summary>
+        /// <remarks>
+        ///     This method can be used to minimize a collection's memory overhead
+        ///     if no new elements will be added to the collection.
+        /// </remarks>
+        public void TrimExcess()
+        {
+            int threshold = (int)(_nodes.Length * 0.9);
+            if (_size < threshold)
+            {
+                Array.Resize(ref _nodes, _size);
+                _version++;
+            }
+        }
+
+        /// <summary>
+        ///     Grows the priority queue to match the specified min capacity.
+        /// </summary>
+        private void Grow(int minCapacity)
+        {
+            Debug.Assert(_nodes.Length < minCapacity);
+
+            const int GrowFactor = 2;
+            const int MinimumGrow = 4;
+
+            int newcapacity = GrowFactor * _nodes.Length;
+
+            // Allow the queue to grow to maximum possible capacity (~2G elements) before encountering overflow.
+            // Note that this check works even when _nodes.Length overflowed thanks to the (uint) cast
+            if ((uint)newcapacity > ArrayEx.MaxLength) newcapacity = ArrayEx.MaxLength;
+
+            // Ensure minimum growth is respected.
+            newcapacity = Math.Max(newcapacity, _nodes.Length + MinimumGrow);
+
+            // If the computed capacity is still less than specified, set to the original argument.
+            // Capacities exceeding Array.MaxLength will be surfaced as OutOfMemoryException by Array.Resize.
+            if (newcapacity < minCapacity) newcapacity = minCapacity;
+
+            Array.Resize(ref _nodes, newcapacity);
+        }
+
+        /// <summary>
+        ///     Removes the node from the root of the heap
+        /// </summary>
+        private void RemoveRootNode()
+        {
+            int lastNodeIndex = --_size;
+            _version++;
+
+            if (lastNodeIndex > 0)
+            {
+                var lastNode = _nodes[lastNodeIndex];
+                if (_comparer == null)
+                    MoveDownDefaultComparer(lastNode, 0);
+                else
+                    MoveDownCustomComparer(lastNode, 0);
+            }
+
+            if (RuntimeHelpers.IsReferenceOrContainsReferences<(TElement, TPriority)>())
+                _nodes[lastNodeIndex] = default;
+        }
+
+        /// <summary>
+        ///     Gets the index of an element's parent.
+        /// </summary>
+        private static int GetParentIndex(int index) => (index - 1) >> Log2Arity;
+
+        /// <summary>
+        ///     Gets the index of the first child of an element.
+        /// </summary>
+        private static int GetFirstChildIndex(int index) => (index << Log2Arity) + 1;
+
+        /// <summary>
+        ///     Converts an unordered list into a heap.
+        /// </summary>
+        private void Heapify()
+        {
+            // Leaves of the tree are in fact 1-element heaps, for which there
+            // is no need to correct them. The heap property needs to be restored
+            // only for higher nodes, starting from the first node that has children.
+            // It is the parent of the very last element in the array.
+
+            var nodes = _nodes;
+            int lastParentWithChildren = GetParentIndex(_size - 1);
+
+            if (_comparer == null)
+                for (int index = lastParentWithChildren; index >= 0; --index)
+                    MoveDownDefaultComparer(nodes[index], index);
+            else
+                for (int index = lastParentWithChildren; index >= 0; --index)
+                    MoveDownCustomComparer(nodes[index], index);
+        }
+
+        /// <summary>
+        ///     Moves a node up in the tree to restore heap order.
+        /// </summary>
+        private void MoveUpDefaultComparer((TElement Element, TPriority Priority) node, int nodeIndex)
+        {
+            // Instead of swapping items all the way to the root, we will perform
+            // a similar optimization as in the insertion sort.
+
+            Debug.Assert(_comparer is null);
+            Debug.Assert(0 <= nodeIndex && nodeIndex < _size);
+
+            var nodes = _nodes;
+
+            while (nodeIndex > 0)
+            {
+                int parentIndex = GetParentIndex(nodeIndex);
+                var parent = nodes[parentIndex];
+
+                if (Comparer<TPriority>.Default.Compare(node.Priority, parent.Priority) < 0)
+                {
+                    nodes[nodeIndex] = parent;
+                    nodeIndex = parentIndex;
+                }
+                else
+                {
+                    break;
+                }
+            }
+
+            nodes[nodeIndex] = node;
+        }
+
+        /// <summary>
+        ///     Moves a node up in the tree to restore heap order.
+        /// </summary>
+        private void MoveUpCustomComparer((TElement Element, TPriority Priority) node, int nodeIndex)
+        {
+            // Instead of swapping items all the way to the root, we will perform
+            // a similar optimization as in the insertion sort.
+
+            Debug.Assert(_comparer is not null);
+            Debug.Assert(0 <= nodeIndex && nodeIndex < _size);
+
+            var comparer = _comparer;
+            var nodes = _nodes;
+
+            while (nodeIndex > 0)
+            {
+                int parentIndex = GetParentIndex(nodeIndex);
+                var parent = nodes[parentIndex];
+
+                if (comparer != null && comparer.Compare(node.Priority, parent.Priority) < 0)
+                {
+                    nodes[nodeIndex] = parent;
+                    nodeIndex = parentIndex;
+                }
+                else
+                {
+                    break;
+                }
+            }
+
+            nodes[nodeIndex] = node;
+        }
+
+        /// <summary>
+        ///     Moves a node down in the tree to restore heap order.
+        /// </summary>
+        private void MoveDownDefaultComparer((TElement Element, TPriority Priority) node, int nodeIndex)
+        {
+            // The node to move down will not actually be swapped every time.
+            // Rather, values on the affected path will be moved up, thus leaving a free spot
+            // for this value to drop in. Similar optimization as in the insertion sort.
+
+            Debug.Assert(_comparer is null);
+            Debug.Assert(0 <= nodeIndex && nodeIndex < _size);
+
+            var nodes = _nodes;
+            int size = _size;
+
+            int i;
+            while ((i = GetFirstChildIndex(nodeIndex)) < size)
+            {
+                // Find the child node with the minimal priority
+                var minChild = nodes[i];
+                int minChildIndex = i;
+
+                int childIndexUpperBound = Math.Min(i + Arity, size);
+                while (++i < childIndexUpperBound)
+                {
+                    var nextChild = nodes[i];
+                    if (Comparer<TPriority>.Default.Compare(nextChild.Priority, minChild.Priority) < 0)
+                    {
+                        minChild = nextChild;
+                        minChildIndex = i;
+                    }
+                }
+
+                // Heap property is satisfied; insert node in this location.
+                if (Comparer<TPriority>.Default.Compare(node.Priority, minChild.Priority) <= 0) break;
+
+                // Move the minimal child up by one node and
+                // continue recursively from its location.
+                nodes[nodeIndex] = minChild;
+                nodeIndex = minChildIndex;
+            }
+
+            nodes[nodeIndex] = node;
+        }
+
+        /// <summary>
+        ///     Moves a node down in the tree to restore heap order.
+        /// </summary>
+        private void MoveDownCustomComparer((TElement Element, TPriority Priority) node, int nodeIndex)
+        {
+            // The node to move down will not actually be swapped every time.
+            // Rather, values on the affected path will be moved up, thus leaving a free spot
+            // for this value to drop in. Similar optimization as in the insertion sort.
+
+            Debug.Assert(_comparer is not null);
+            Debug.Assert(0 <= nodeIndex && nodeIndex < _size);
+
+            var comparer = _comparer;
+            var nodes = _nodes;
+            int size = _size;
+
+            int i;
+            while ((i = GetFirstChildIndex(nodeIndex)) < size)
+            {
+                // Find the child node with the minimal priority
+                var minChild = nodes[i];
+                int minChildIndex = i;
+
+                int childIndexUpperBound = Math.Min(i + Arity, size);
+                while (++i < childIndexUpperBound)
+                {
+                    var nextChild = nodes[i];
+                    if (comparer != null && comparer.Compare(nextChild.Priority, minChild.Priority) < 0)
+                    {
+                        minChild = nextChild;
+                        minChildIndex = i;
+                    }
+                }
+
+                // Heap property is satisfied; insert node in this location.
+                if (comparer != null && comparer.Compare(node.Priority, minChild.Priority) <= 0) break;
+
+                // Move the minimal child up by one node and continue recursively from its location.
+                nodes[nodeIndex] = minChild;
+                nodeIndex = minChildIndex;
+            }
+
+            nodes[nodeIndex] = node;
+        }
+
+        /// <summary>
+        ///     Initializes the custom comparer to be used internally by the heap.
+        /// </summary>
+        private static IComparer<TPriority>? InitializeComparer(IComparer<TPriority>? comparer)
+        {
+            if (typeof(TPriority).IsValueType)
+            {
+                if (comparer == Comparer<TPriority>.Default)
+                    // if the user manually specifies the default comparer,
+                    // revert to using the optimized path.
+                    return null;
+
+                return comparer;
+            }
+
+            // Currently the JIT doesn't optimize direct Comparer<T>.Default.Compare
+            // calls for reference types, so we want to cache the comparer instance instead.
+            // TODO https://github.com/dotnet/runtime/issues/10050: Update if this changes in the future.
+            return comparer ?? Comparer<TPriority>.Default;
+        }
+
+        /// <summary>
+        ///     Enumerates the contents of a <see cref="PriorityQueue{TElement, TPriority}" />, without any ordering guarantees.
+        /// </summary>
+        [DebuggerDisplay("Count = {Count}")]
+        [DebuggerTypeProxy(typeof(PriorityQueueDebugView<,>))]
+        public sealed class UnorderedItemsCollection : IReadOnlyCollection<(TElement Element, TPriority Priority)>,
+            ICollection
+        {
+            internal readonly PriorityQueue<TElement, TPriority> _queue;
+
+            internal UnorderedItemsCollection(PriorityQueue<TElement, TPriority> queue)
+            {
+                _queue = queue;
+            }
+
+            object ICollection.SyncRoot => this;
+            bool ICollection.IsSynchronized => false;
+
+            void ICollection.CopyTo(Array array, int index)
+            {
+                ArgumentNullException.ThrowIfNull(array);
+
+                if (array.Rank != 1) throw new ArgumentException(SR.Arg_RankMultiDimNotSupported, nameof(array));
+
+                if (array.GetLowerBound(0) != 0) throw new ArgumentException(SR.Arg_NonZeroLowerBound, nameof(array));
+
+                if (index < 0 || index > array.Length)
+                    throw new ArgumentOutOfRangeException(nameof(index), index,
+                        SR.ArgumentOutOfRange_IndexMustBeLessOrEqual);
+
+                if (array.Length - index < _queue._size) throw new ArgumentException(SR.Argument_InvalidOffLen);
+
+                try
+                {
+                    Array.Copy(_queue._nodes, 0, array, index, _queue._size);
+                }
+                catch (ArrayTypeMismatchException)
+                {
+                    throw new ArgumentException(SR.Argument_InvalidArrayType, nameof(array));
+                }
+            }
+
+            public int Count => _queue._size;
+
+            IEnumerator<(TElement Element, TPriority Priority)> IEnumerable<(TElement Element, TPriority Priority)>.
+                GetEnumerator() => GetEnumerator();
+
+            IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
+
+            /// <summary>
+            ///     Returns an enumerator that iterates through the <see cref="UnorderedItems" />.
+            /// </summary>
+            /// <returns>An <see cref="Enumerator" /> for the <see cref="UnorderedItems" />.</returns>
+            public Enumerator GetEnumerator() => new(_queue);
+
+            /// <summary>
+            ///     Enumerates the element and priority pairs of a <see cref="PriorityQueue{TElement, TPriority}" />,
+            ///     without any ordering guarantees.
+            /// </summary>
+            public struct Enumerator : IEnumerator<(TElement Element, TPriority Priority)>
+            {
+                private readonly PriorityQueue<TElement, TPriority> _queue;
+                private readonly int _version;
+                private int _index;
+
+                internal Enumerator(PriorityQueue<TElement, TPriority> queue)
+                {
+                    _queue = queue;
+                    _index = 0;
+                    _version = queue._version;
+                    Current = default;
+                }
+
+                /// <summary>
+                ///     Releases all resources used by the <see cref="Enumerator" />.
+                /// </summary>
+                public void Dispose()
+                {
+                }
+
+                /// <summary>
+                ///     Advances the enumerator to the next element of the <see cref="UnorderedItems" />.
+                /// </summary>
+                /// <returns>
+                ///     <see langword="true" /> if the enumerator was successfully advanced to the next element;
+                ///     <see langword="false" /> if the enumerator has passed the end of the collection.
+                /// </returns>
+                public bool MoveNext()
+                {
+                    var localQueue = _queue;
+
+                    if (_version == localQueue._version && (uint)_index < (uint)localQueue._size)
+                    {
+                        Current = localQueue._nodes[_index];
+                        _index++;
+                        return true;
+                    }
+
+                    return MoveNextRare();
+                }
+
+                private bool MoveNextRare()
+                {
+                    if (_version != _queue._version)
+                        throw new InvalidOperationException(SR.InvalidOperation_EnumFailedVersion);
+
+                    _index = _queue._size + 1;
+                    Current = default;
+                    return false;
+                }
+
+                /// <summary>
+                ///     Gets the element at the current position of the enumerator.
+                /// </summary>
+                public (TElement Element, TPriority Priority) Current { get; private set; }
+
+                object IEnumerator.Current => Current;
+
+                void IEnumerator.Reset()
+                {
+                    if (_version != _queue._version)
+                        throw new InvalidOperationException(SR.InvalidOperation_EnumFailedVersion);
+
+                    _index = 0;
+                    Current = default;
+                }
+            }
+        }
+    }
+}

NEG/UI/PriorityQueue.cs.meta

@@ -0,0 +1,11 @@
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+guid: e1b6a9a70d997fd468f30caa1e760078
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

NEG/UI/UiManager.cs

@@ -0,0 +1,169 @@
+using JetBrains.Annotations;
+using NEG.UI.Area;
+using NEG.UI.Popup;
+using NEG.UI.Window;
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace NEG.UI
+{
+    [PublicAPI]
+    public abstract class UiManager
+    {
+        public static UiManager Instance { get; private set; }
+        
+        /// <summary>
+        /// Current area shown on screen.
+        /// </summary>
+        public IArea CurrentArea
+        {
+            get => currentArea;
+            set
+            {
+                currentArea?.SetEnabled(false);
+
+                currentArea = value;
+
+                currentArea?.SetEnabled(true);
+            }
+        }
+        
+        /// <summary>
+        /// Current window that is considered main (focused, lastly opened). Can be null.
+        /// </summary>
+        public IWindow CurrentMainWindow { get; protected set; }
+
+        private IArea currentArea;
+        private (PopupData data, int priority) currentShownPopup;
+        protected IDefaultPopup currentDefaultPopup;
+
+        private PriorityQueue<PopupData, int> popupsToShow = new();
+
+        //TODO: localize
+        private string localizedYes = "Yes", localizedNo = "No", localizedOk = "Ok";
+
+        protected UiManager(IArea startArea)
+        {
+            if (Instance != null)
+            {
+                Debug.LogError("Only one instance od UiManager is allowed");
+                return;
+            }
+
+            Instance = this;
+
+            CurrentArea = startArea;
+        }
+
+        /// <summary>
+        /// Show popup if there is non other currently shown. Otherwise add current popup to ordered queue and show it later. It will be closed after pressing ok button.
+        /// </summary>
+        /// <param name="title">popup title</param>
+        /// <param name="content">popup content</param>
+        /// <param name="okText">text to show on ok button, empty for localized "Ok"</param>
+        /// <param name="okPressed">additional action on ok pressed</param>
+        /// <param name="priority">priority of popup (lower number -> show first)</param>
+        /// <param name="forceShow">force show current popup only if currently shown has lower priority</param>
+        /// <returns>data for created popup, can be used to invalidate popup (will not show)</returns>
+        public PopupData ShowOkPopup(string title, string content, string okText = null, Action okPressed = null, int priority = 0, bool forceShow = false)
+        {
+            var data = new DefaultPopupData(currentDefaultPopup, title, content,
+                new List<(string, Action)>() { (okText ?? localizedOk, okPressed) });
+            ShowPopup(data, priority, forceShow);
+            return data;
+        }
+        
+        /// <summary>
+        /// Show popup if there is non other currently shown. Otherwise add current popup to ordered queue and show it later. It will be closed after pressing yes or no button.
+        /// </summary>
+        /// <param name="title">popup title</param>
+        /// <param name="content">popup content</param>
+        /// <param name="yesText">text to show on yes button, empty for localized "Yes"</param>
+        /// <param name="noText">text to show on no button, empty for localized "No"</param>
+        /// <param name="yesPressed">additional action on yes pressed</param>
+        /// <param name="noPressed">additional action on no pressed</param>
+        /// <param name="priority">priority of popup (lower number -> show first)</param>
+        /// <param name="forceShow">force show current popup only if currently shown has lower priority</param>
+        /// <returns>data for created popup, can be used to invalidate popup (will not show)</returns>
+        public PopupData ShowYesNoPopup(string title, string content, string yesText = null, string noText = null, Action yesPressed = null, Action noPressed = null, int priority = 0, bool forceShow = false)
+        {
+            var data = new DefaultPopupData(currentDefaultPopup, title, content,
+                new List<(string, Action)>() { (yesText ?? localizedYes, yesPressed), (noText ?? localizedNo, noPressed) });
+            ShowPopup(data, priority, forceShow);
+            return data;
+        }
+        
+        /// <summary>
+        /// Show popup if there is non other currently shown. Otherwise add current popup to ordered queue and show it later. It will be closed after pressing any button.
+        /// </summary>
+        /// <param name="title">popup title</param>
+        /// <param name="content">popup content</param>
+        /// <param name="actions">list of actions</param>
+        /// <param name="priority">priority of popup (lower number -> show first)</param>
+        /// <param name="forceShow">force show current popup only if currently shown has lower priority</param>
+        /// <returns>data for created popup, can be used to invalidate popup (will not show)</returns>
+        public PopupData ShowPopup(string title, string content, List<(string, Action)> actions, int priority = 0, bool forceShow = false)
+        {
+            var data = new DefaultPopupData(currentDefaultPopup, title, content, actions);
+            ShowPopup(data, priority, forceShow);
+            return data;
+        }
+        
+        /// <summary>
+        /// Show popup if there is non other currently shown. Otherwise add current popup to ordered queue and show it later.
+        /// </summary>
+        /// <param name="data">popup data object</param>
+        /// <param name="priority">priority of popup (lower number -> show first)</param>
+        /// <param name="forceShow">force show current popup only if currently shown has lower priority</param>
+        public void ShowPopup(PopupData data, int priority = 0, bool forceShow = false)
+        {
+            popupsToShow.Enqueue(data, priority);
+            UpdatePopupsState(forceShow, priority, data);
+        }
+        
+        protected void PopupClosed(PopupData data)
+        {
+            if (currentShownPopup.data != data)
+            {
+                Debug.LogError("Popup was not shown");
+                return;
+            }
+            UpdatePopupsState(false);
+        }
+        
+        protected void SetDefaultPopup(IDefaultPopup popup) => currentDefaultPopup = popup;
+
+        private void UpdatePopupsState(bool forceShow, int priority = 0, PopupData data = null)
+        {
+            if (forceShow)
+            {
+                if(currentShownPopup.priority <= priority)
+                    return;
+                
+                popupsToShow.Enqueue(currentShownPopup.data, currentShownPopup.priority);
+                ShowPopup(data, priority);
+                return;
+            }
+            
+            if(!popupsToShow.TryDequeue(out var d, out int p))
+               return;
+
+            ShowPopup(d, p);
+        }
+
+        private void ShowPopup(PopupData data, int priority)
+        {
+            if (currentShownPopup.data != null)
+            {
+                currentShownPopup.data.PopupClosedEvent -= PopupClosed;
+                currentShownPopup.data.Hide();
+            }
+            currentShownPopup = (data, priority);
+            data.Show();
+            data.PopupClosedEvent += PopupClosed;
+        }
+    }
+}
+
+

NEG/UI/UiManager.cs.meta

@@ -0,0 +1,11 @@
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+guid: c322beedd2ec8f844903c18b1ef74b15
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
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+  userData: 
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NEG/UI/UnityUi.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: a0be272f427b40848b8aeff5b04770b4
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

NEG/UI/UnityUi/Area.meta

@@ -0,0 +1,3 @@
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+guid: a99aed857b7b9e7459811b14fefdb04f
+timeCreated: 1670706939

NEG/UI/UnityUi/Area/AutoWindowOpen.cs

@@ -0,0 +1,15 @@
+using NEG.UI.UnityUi.Window;
+using NEG.UI.Window;
+using System;
+using UnityEngine;
+
+namespace NEG.UI.Area
+{
+    [Tooltip(tooltip: "Automatically open attached window on start")]
+    public class AutoWindowOpen : MonoBehaviour
+    {
+        [SerializeField] private MonoWindow window;
+        
+        private void Start() => window.Open();
+    }
+}

NEG/UI/UnityUi/Area/AutoWindowOpen.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: e439a77332dc4e3a881348c9506556c6
+timeCreated: 1673791915

NEG/UI/UnityUi/Area/MonoArea.cs

@@ -0,0 +1,41 @@
+using System.Collections.Generic;
+using UnityEngine;
+using NEG.UI.Popup;
+using NEG.UI.UnityUi.Window;
+using NEG.UI.UnityUi.WindowSlot;
+using NEG.UI.Window;
+using NEG.UI.WindowSlot;
+using System;
+
+namespace NEG.UI.Area
+{
+    public class MonoArea : MonoBehaviour, IArea
+    {
+        public IEnumerable<IWindowSlot> AvailableSlots => windowSlots;
+        public IWindowSlot DefaultWindowSlot => windowSlots[0];
+        
+        [SerializeField] private bool setAsDefaultArea;
+
+        [SerializeField] private List<MonoWindowSlot> windowSlots;
+
+        public virtual void SetEnabled(bool setEnabled) => gameObject.SetActive(setEnabled);
+
+        public virtual void OpenWindow(IWindow window, object data = null)
+        {
+            DefaultWindowSlot.AttachWindow(window);
+            window.SetData(data);
+        }
+
+        protected virtual void Awake()
+        {
+            if (setAsDefaultArea)
+                UiManager.Instance.CurrentArea = this;
+        }
+
+        protected virtual void OnDestroy()
+        {
+            if (ReferenceEquals(UiManager.Instance.CurrentArea, this))
+                UiManager.Instance.CurrentArea = null;
+        }
+    }
+}

NEG/UI/UnityUi/Area/MonoArea.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 39eb59ca1ef60934abb3f0c64169be65
+timeCreated: 1670707479

NEG/UI/UnityUi/Buttons.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: dcaa262d2bcd4b19aa25512a19830555
+timeCreated: 1670777190

NEG/UI/UnityUi/Buttons/BaseButton.cs

@@ -0,0 +1,78 @@
+using FMOD.Studio;
+using FMODUnity;
+using System;
+using UnityEngine;
+using UnityEngine.EventSystems;
+using UnityEngine.UI;
+
+namespace NEG.UI.UnityUi.Buttons
+{
+    [RequireComponent(typeof(ButtonSerializeFields))]
+    public class BaseButton : MonoBehaviour, ISelectHandler, IDeselectHandler, IPointerEnterHandler, IPointerExitHandler
+    {
+        public event Action OnButtonPressed;
+        
+        public bool Interactable { get => serializeFields.Button.interactable; set => serializeFields.Button.interactable = value; }
+        
+        [SerializeField]
+        protected ButtonSerializeFields serializeFields;
+
+        private bool isHovered;
+
+        public virtual void OnSelect(BaseEventData eventData)
+        {
+            if (serializeFields.Text)
+                serializeFields.Text.color = serializeFields.SelectedTextColor;
+        }
+
+        public void OnDeselect(BaseEventData eventData)
+        {
+            if (serializeFields.Text)
+                serializeFields.Text.color = serializeFields.DeselectedTextColor;
+        }
+
+        public void OnPointerEnter(PointerEventData eventData)
+        {
+            isHovered = true;
+            if (serializeFields.Text)
+                serializeFields.Text.color = serializeFields.SelectedTextColor;
+        }
+
+        public void OnPointerExit(PointerEventData eventData)
+        {
+            isHovered = false;
+            if (serializeFields.Text)
+                serializeFields.Text.color = serializeFields.DeselectedTextColor;
+        }
+
+        public void SetText(string text)
+        {
+            if(serializeFields == null)
+                return;
+            if(serializeFields.Text == null)
+                return;
+            serializeFields.Text.text = text;
+        }
+
+        protected virtual void Awake()
+        {
+            if(serializeFields == null)
+                serializeFields = GetComponent<ButtonSerializeFields>();
+            serializeFields.Button.onClick.AddListener(OnClicked);
+            OnDeselect(null);
+        }
+
+        private void OnValidate()
+        {
+            if(serializeFields == null)
+                serializeFields = GetComponent<ButtonSerializeFields>();
+        }
+
+        protected virtual void OnClicked()
+        {
+            OnDeselect(null);
+            isHovered = false;
+            OnButtonPressed?.Invoke();
+        }
+    }
+}

NEG/UI/UnityUi/Buttons/BaseButton.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 3a250ef2d0c34e7396a16fc5eddbdb01
+timeCreated: 1670777213

NEG/UI/UnityUi/Buttons/ButtonReaction.cs

@@ -0,0 +1,15 @@
+using System;
+using UnityEngine;
+
+namespace NEG.UI.UnityUi.Buttons
+{
+    [RequireComponent(typeof(BaseButton))]
+    public abstract class ButtonReaction : MonoBehaviour
+    {
+        private void Awake() => GetComponent<BaseButton>().OnButtonPressed += OnClicked;
+
+        private void OnDestroy() => GetComponent<BaseButton>().OnButtonPressed -= OnClicked;
+
+        protected abstract void OnClicked();
+    }
+}

NEG/UI/UnityUi/Buttons/ButtonReaction.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: a9761128a04b49c2a26eddfabe70331f
+timeCreated: 1675707257

NEG/UI/UnityUi/Buttons/ButtonSerializeFields.cs

@@ -0,0 +1,33 @@
+using FMODUnity;
+using System;
+using TMPro;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace NEG.UI.UnityUi.Buttons
+{
+    public class ButtonSerializeFields : MonoBehaviour
+    {
+        [field: SerializeField]
+        public Button Button { get; private set; }
+        [field: SerializeField]
+        public TMP_Text Text { get; private set; }
+        [field: SerializeField]
+        public Color SelectedTextColor { get; private set; }
+        [field: SerializeField]
+        public Color DeselectedTextColor { get; private set; }
+        [field: SerializeField]
+        public EventReference HoverEventRef { get; private set; }
+        [field: SerializeField]
+        public EventReference ClickEventRef { get; private set; }
+
+        private void OnValidate()
+        {
+            if(Button == null)
+                Button = GetComponent<Button>();
+            if (Text == null)
+                Text = GetComponentInChildren<TMP_Text>();
+        }
+    }
+
+}

NEG/UI/UnityUi/Buttons/ButtonSerializeFields.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 3f8c6cf4cf18463c86ec1165c61c79b2
+timeCreated: 1670777232

NEG/UI/UnityUi/Buttons/ChangeSceneButton.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace NEG.UI.UnityUi.Buttons
+{
+    [RequireComponent(typeof(BaseButton))]
+    public class ChangeSceneButton : ButtonReaction
+    {
+        [Header("Leave empty to use int value")]
+        [SerializeField] private string sceneName;
+
+        [SerializeField] private int sceneIndex;
+
+        protected override void OnClicked()
+        {
+            if (string.IsNullOrEmpty(sceneName))
+                SceneManager.LoadScene(sceneIndex);
+            else
+                SceneManager.LoadScene(sceneName);
+        }
+    }
+}

NEG/UI/UnityUi/Buttons/ChangeSceneButton.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 15537f041c9c1204ebf05a5fb7ff6a3d
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

NEG/UI/UnityUi/Buttons/CloseAllWindows.cs

@@ -0,0 +1,9 @@
+using UnityEngine;
+
+namespace NEG.UI.UnityUi.Buttons
+{
+    public class CloseAllWindows : ButtonReaction
+    {
+        protected override void OnClicked() => UiManager.Instance.CurrentArea.CloseAllWindows();
+    }
+}

NEG/UI/UnityUi/Buttons/CloseAllWindows.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 2fa43803dc014b7694d265d48c1fc680
+timeCreated: 1672767354

NEG/UI/UnityUi/Buttons/CloseWindow.cs

@@ -0,0 +1,22 @@
+using NEG.UI.UnityUi.Window;
+using NEG.UI.Window;
+using System;
+using UnityEngine;
+
+namespace NEG.UI.UnityUi.Buttons
+{
+    [RequireComponent(typeof(BaseButton))]
+    public class CloseWindow : ButtonReaction
+    {
+        [SerializeField] private MonoWindow windowToClose;
+
+        protected override void OnClicked() => windowToClose.Close();
+
+        private void OnValidate()
+        {
+            if(windowToClose != null)
+                return;
+            windowToClose = GetComponentInParent<MonoWindow>();
+        }
+    }
+}

NEG/UI/UnityUi/Buttons/CloseWindow.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 3001b971ff1e4915a29784efdf190bd6
+timeCreated: 1670807872

NEG/UI/UnityUi/Buttons/CloseWindowOnImageTouch.cs

@@ -0,0 +1,14 @@
+using NEG.UI.UnityUi.Window;
+using NEG.UI.Window;
+using UnityEngine;
+using UnityEngine.EventSystems;
+
+namespace NEG.UI.UnityUi.Buttons
+{
+    public class CloseWindowOnImageTouch : MonoBehaviour, IPointerDownHandler
+    {
+        [SerializeField] private MonoWindow windowToClose;
+        
+        public void OnPointerDown(PointerEventData eventData) => windowToClose.Close();
+    }
+}

NEG/UI/UnityUi/Buttons/CloseWindowOnImageTouch.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: dc1aab636014456da7f768a05d0f143e
+timeCreated: 1673909580

NEG/UI/UnityUi/Buttons/OpenWindow.cs

@@ -0,0 +1,19 @@
+using NEG.UI.UnityUi.Window;
+using NEG.UI.UnityUi.WindowSlot;
+using System;
+using UnityEngine;
+using NEG.UI.Window;
+using NEG.UI.WindowSlot;
+
+namespace NEG.UI.UnityUi.Buttons
+{
+    [RequireComponent(typeof(BaseButton))]
+    public class OpenWindow : ButtonReaction
+    {
+        [SerializeField] private MonoWindow window;
+        [Header("Open on default area slot if empty")]
+        [SerializeField] private MonoWindowSlot slot;
+
+        protected override void OnClicked() => window.Open(slot);
+    }
+}

NEG/UI/UnityUi/Buttons/OpenWindow.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 66a5c05f0ba84b2a9b54f3e05a21d495
+timeCreated: 1670806968

NEG/UI/UnityUi/CarouselList.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: d6bf45a37eca4dc4aa1926eb7dce5ab6
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

NEG/UI/UnityUi/CarouselList/CarouselList.cs

@@ -0,0 +1,95 @@
+using JetBrains.Annotations;
+using NEG.UI.UnityUi.Buttons;
+using System;
+using System.Collections.Generic;
+using TMPro;
+using UnityEngine;
+
+
+namespace NEG.UI.UnityUi
+{
+    [PublicAPI]
+    public class CarouselList : MonoBehaviour
+    {
+        /// <summary>
+        /// Current option
+        /// </summary>
+        public string CurrentOption { get; private set; }
+        
+        /// <summary>
+        /// Current selected option id
+        /// </summary>
+        public int CurrentOptionId { get; private set; }
+
+        [SerializeField] private BaseButton nextButton;
+        [SerializeField] private BaseButton prevButton;
+        [SerializeField] private TMP_Text currentOptionText;
+
+        private List<string> options;
+
+        /// <summary>
+        /// Sets new options list, automatically first will be selected.
+        /// </summary>
+        /// <param name="options">list of options names</param>
+        public void SetOptions(List<string> options)
+        {
+            this.options = options;
+            SelectOption(0);
+        }
+
+        public void SelectNextOption() => ChangeOption(true);
+        public void SelectPrevOption() => ChangeOption(false);
+        
+        /// <summary>
+        /// Selects option with provided id.
+        /// </summary>
+        /// <param name="option">option number</param>
+        public void SelectOption(int option)
+        {
+            if (option < 0 || option >= options.Count)
+            {
+                Debug.LogError("Invalid option number");
+                return;
+            }
+            CurrentOptionId = option;
+            CurrentOption = options[option];
+            currentOptionText.text = CurrentOption;
+        }
+
+        /// <summary>
+        /// Select option with provided value. Use with caution, better use <see cref="SelectOption(int)"/>.
+        /// </summary>
+        /// <param name="option">option value to select</param>
+        public void SelectOption(string option)
+        {
+            if (options.Count == 0)
+            {
+                Debug.LogError("Carousel List cannot be empty when selecting option");
+                return;
+            }
+
+            int index = options.IndexOf(option);
+            if (index == -1)
+            {
+                Debug.LogError($"Option {option} not found");
+                return;
+            }
+            
+            SelectOption(index);
+        }
+
+        private void Awake()
+        {
+            nextButton.OnButtonPressed += SelectNextOption;
+            prevButton.OnButtonPressed += SelectPrevOption;
+        }
+
+        private void OnDestroy()
+        {
+            nextButton.OnButtonPressed -= SelectNextOption;
+            prevButton.OnButtonPressed -= SelectPrevOption;
+        }
+
+        private void ChangeOption(bool next) => SelectOption((CurrentOptionId + (next ? 1 : -1) + options.Count) % options.Count);
+    }
+}

NEG/UI/UnityUi/CarouselList/CarouselList.cs.meta

@@ -0,0 +1,3 @@
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+guid: 9915ee4d467e47e485c4a48be295b5c2
+timeCreated: 1672834830

NEG/UI/UnityUi/MonoUiManager.cs

@@ -0,0 +1,52 @@
+using NEG.UI.Area;
+using NEG.UI.Popup;
+using NEG.UI.UnityUi.Popup;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.AddressableAssets;
+using UnityEngine.Assertions;
+using UnityEngine.SceneManagement;
+
+namespace NEG.UI.UnityUi
+{
+    /// <summary>
+    /// Implements ui using UnityUI and Unity Event System with New Input System.
+    /// <para>You have to provide prefabs with addresses:</para>
+    /// <para> - NEG/UI/PopupCanvas - prefab with canvas to create popups (will be created on every scene)</para>
+    /// <para> - NEG/UI/DefaultPopupPrefab - prefab of default popup with 2 options (has to have <see cref="MonoDefaultPopup"/> component)</para>
+    /// </summary>
+    public class MonoUiManager : UiManager
+    {
+        //TODO: use default unity selection
+        //TODO: window snaping to slots
+        
+        private readonly MonoDefaultPopup defaultPopupPrefab;
+        private readonly GameObject canvasPrefab;
+
+        public MonoUiManager(IArea startArea) : base(startArea)
+        {
+            var prefabs =
+                Addressables.LoadAssetsAsync<GameObject>(new List<string>() { "NEG/UI/PopupCanvas", "NEG/UI/DefaultPopupPrefab" }, (_) => { }, Addressables.MergeMode.Union).WaitForCompletion();
+      
+            Assert.AreEqual(prefabs.Count, 2, "No prefabs was provided. Please check MonoUiManager class documentation");
+            Assert.IsNotNull(prefabs[0].GetComponent<Canvas>());
+            Assert.IsNotNull(prefabs[1].GetComponent<MonoDefaultPopup>());
+            
+            canvasPrefab = prefabs[0];
+            defaultPopupPrefab = prefabs[1].GetComponent<MonoDefaultPopup>();
+            
+            SpawnDefaultPopup();
+
+            SceneManager.activeSceneChanged += (_, _) => SpawnDefaultPopup();
+        }
+
+        private void SpawnDefaultPopup()
+        {
+            var canvas = Object.Instantiate(canvasPrefab);
+            canvas.name = "DefaultPopupCanvas";
+            SetDefaultPopup(Object.Instantiate(defaultPopupPrefab, canvas.transform));
+            currentDefaultPopup.Close(true);
+        }
+        
+    }
+}

NEG/UI/UnityUi/MonoUiManager.cs.meta

@@ -0,0 +1,3 @@
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+timeCreated: 1672155707

NEG/UI/UnityUi/NEG.UI.UnityUi.asmdef

@@ -0,0 +1,24 @@
+{
+    "name": "NEG.UI.UnityUi",
+    "rootNamespace": "",
+    "references": [
+        "GUID:343deaaf83e0cee4ca978e7df0b80d21",
+        "GUID:7361f1d9c43da6649923760766194746",
+        "GUID:6055be8ebefd69e48b49212b09b47b2f",
+        "GUID:0c752da273b17c547ae705acf0f2adf2",
+        "GUID:9e24947de15b9834991c9d8411ea37cf",
+        "GUID:84651a3751eca9349aac36a66bba901b",
+        "GUID:23eed6c2401dca1419d1ebd180e58c5a"
+    ],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": false,
+    "precompiledReferences": [
+        ""
+    ],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

NEG/UI/UnityUi/NEG.UI.UnityUi.asmdef.meta

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+AssemblyDefinitionImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

NEG/UI/UnityUi/Popup.meta

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+guid: 31e9b0c7a4425a248841ec2f02b92157
+timeCreated: 1670707809

NEG/UI/UnityUi/Popup/MonoDefaultPopup.cs

@@ -0,0 +1,36 @@
+using NEG.UI.Popup;
+using NEG.UI.UnityUi.Buttons;
+using System;
+using System.Collections.Generic;
+using TMPro;
+using UnityEngine;
+
+namespace NEG.UI.UnityUi.Popup
+{
+    public class MonoDefaultPopup : MonoPopup, IDefaultPopup
+    {
+        [SerializeField] private TMP_Text titleText;
+        [SerializeField] private TMP_Text contentText;
+        [SerializeField] private Transform buttonsParent;
+        [SerializeField] private BaseButton buttonPrefab;
+
+        public void SetContent(string title, string content, List<(string, Action)> options)
+        {
+            foreach (Transform child in buttonsParent)
+            {
+                Destroy(child.gameObject);
+            }
+
+            titleText.text = title;
+            contentText.text = content;
+            
+            foreach ((string text, Action action) item in options)
+            {
+                var button = Instantiate(buttonPrefab, buttonsParent);
+                button.SetText(item.text);
+                button.OnButtonPressed += item.action;
+                button.OnButtonPressed += () => Close();
+            }
+        }
+    }
+}

NEG/UI/UnityUi/Popup/MonoDefaultPopup.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 831fb29e6c6d4997a7d471c646eec077
+timeCreated: 1672154589

NEG/UI/UnityUi/Popup/MonoPopup.cs

@@ -0,0 +1,30 @@
+using NEG.UI.Popup;
+using System;
+using UnityEngine;
+
+namespace NEG.UI.UnityUi.Popup
+{
+    public class MonoPopup : MonoBehaviour, IPopup
+    {
+        public event Action<PopupData> OnPopupClosed;
+        
+        protected PopupData data;
+
+        public void Show(PopupData data)
+        {
+            this.data = data;
+            gameObject.SetActive(true);
+        }
+
+        public void Close(bool silent = false)
+        {
+            gameObject.SetActive(false);
+            
+            if(silent)
+                return;
+            
+            OnPopupClosed?.Invoke(data);
+        }
+        
+    }
+}

NEG/UI/UnityUi/Popup/MonoPopup.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 5d3466b2fe771184eae1ca72c1006d0c
+timeCreated: 1670707831

NEG/UI/UnityUi/Window.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 65adacad835c2cf4b9062296be6098d2
+timeCreated: 1670707788

NEG/UI/UnityUi/Window/MonoWindow.cs

@@ -0,0 +1,59 @@
+using NEG.UI.Area;
+using NEG.UI.UnityUi.Buttons;
+using NEG.UI.UnityUi.WindowSlot;
+using NEG.UI.Window;
+using NEG.UI.WindowSlot;
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace NEG.UI.UnityUi.Window
+{
+    public class MonoWindow : MonoBehaviour, IWindow
+    {
+        public IEnumerable<IWindowSlot> AvailableSlots => windowSlots;
+        public IWindowSlot Parent { get; private set; }
+
+        public bool IsMainWindow { get; private set; }
+        
+        private IWindowSlot DefaultWindowSlot => windowSlots[0];
+        
+        [SerializeField] private List<MonoWindowSlot> windowSlots;
+        [SerializeField] private WindowController controller;
+
+        public void SetOpenedState(IWindowSlot parentSlot)
+        {
+            gameObject.SetActive(true);
+            Parent = parentSlot;
+            if (controller != null) 
+                controller.OnOpened();
+        }
+
+        public void SetData(object data)
+        {
+            if (controller != null) 
+                controller.SetData(data);
+        }
+
+        public void SetClosedState()
+        {
+            gameObject.SetActive(false);
+            Parent = null;
+            ((ISlotsHolder)this).CloseAllWindows();
+        }
+
+        private void Awake() => ((IWindow)this).SetClosedState();
+
+        private void OnValidate()
+        {
+            if (controller == null)
+                controller = GetComponent<WindowController>();
+        }
+
+        public void OpenWindow(IWindow window, object data = null)
+        {
+            DefaultWindowSlot.AttachWindow(window);
+            window.SetData(data);
+        }
+    }
+}

NEG/UI/UnityUi/Window/MonoWindow.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 85d136d6850728d4b96c26fa286ffe3c
+timeCreated: 1670709296

NEG/UI/UnityUi/Window/WindowController.cs

@@ -0,0 +1,18 @@
+using System;
+using UnityEngine;
+
+namespace NEG.UI.UnityUi.Window
+{
+    [RequireComponent(typeof(MonoWindow))]
+    //Due to prefab variants we need this
+    public abstract class WindowController : MonoBehaviour
+    {
+        protected MonoWindow window;
+        
+        public abstract void SetData(object data);
+
+        public abstract void OnOpened();
+
+        protected virtual void Awake() => window = GetComponent<MonoWindow>();
+    }
+}

NEG/UI/UnityUi/Window/WindowController.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 9e3614c1d2b94294937351b640139829
+timeCreated: 1672766736

NEG/UI/UnityUi/WindowSlot.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 47e385f6fb552d74ab4cf25ef6c76595
+timeCreated: 1670707801

NEG/UI/UnityUi/WindowSlot/MonoWindowSlot.cs

@@ -0,0 +1,20 @@
+using NEG.UI.Area;
+using NEG.UI.Window;
+using NEG.UI.WindowSlot;
+using UnityEngine;
+using TNRD;
+
+namespace NEG.UI.UnityUi.WindowSlot
+{
+    public abstract class MonoWindowSlot : MonoBehaviour, IWindowSlot
+    {
+        [field: SerializeField] public bool OpenWindowAsMain { get; private set; }
+        
+        public ISlotsHolder ParentHolder => slotsHolder.Value;
+        public abstract void AttachWindow(IWindow window);
+        public abstract void DetachWindow(IWindow window);
+        public abstract void CloseAllWindows();
+        
+        [SerializeField] private SerializableInterface<ISlotsHolder> slotsHolder;
+    }
+}

NEG/UI/UnityUi/WindowSlot/MonoWindowSlot.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: e5a19b184ce9338449ad6ba899a26cda
+timeCreated: 1670709404

NEG/UI/UnityUi/WindowSlot/SingleWindowSlot.cs

@@ -0,0 +1,26 @@
+using NEG.UI.UnityUi.WindowSlot;
+using NEG.UI.Window;
+using UnityEngine;
+
+namespace NEG.UI.WindowSlot
+{
+    public class SingleWindowSlot : MonoWindowSlot
+    {
+        public IWindow CurrentWindow
+        {
+            get => currentWindow;
+            set
+            {
+                currentWindow?.SetClosedState();
+                currentWindow = value;
+                currentWindow?.SetOpenedState(this);
+            }
+        }
+        
+        private IWindow currentWindow;
+        
+        public override void AttachWindow(IWindow window) => CurrentWindow = window;
+        public override void DetachWindow(IWindow window) => CurrentWindow = null;
+        public override void CloseAllWindows() => CurrentWindow = null;
+    }
+}

NEG/UI/UnityUi/WindowSlot/SingleWindowSlot.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 79c0738c63b2b5c40b96acd89441f78f
+timeCreated: 1670716632

NEG/UI/Window.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 8e57424db9924004a7945bcbbea7bab9
+timeCreated: 1670707788

NEG/UI/Window/IWindow.cs

@@ -0,0 +1,106 @@
+using JetBrains.Annotations;
+using NEG.UI.Area;
+using NEG.UI.WindowSlot;
+using UnityEngine;
+
+namespace NEG.UI.Window
+{
+    public interface IWindow : ISlotsHolder
+    {
+        /// <summary>
+        /// Parent slot of this window.
+        /// </summary>
+        IWindowSlot Parent { get; }
+
+        /// <summary>
+        /// Called internally by slot to open window.
+        /// </summary>
+        /// <param name="parentSlot">slot that opens window</param>
+        void SetOpenedState(IWindowSlot parentSlot);
+
+        /// <summary>
+        /// Sets data for window, usually used for dynamic content set by external logic controller.
+        /// </summary>
+        /// <param name="data">can be any type, window should cast for expected type</param>
+        void SetData(object data);
+        
+        /// <summary>
+        /// Called internally to close window by slot.
+        /// </summary>
+        void SetClosedState();
+    }
+
+    public static class WindowInterfaceExtensions
+    {
+        /// <summary>
+        /// Opens window as slot child. If slot is null or not provided, as child of current area.
+        /// </summary>
+        /// <param name="window">window to open</param>
+        /// <param name="slot">slot to attach window</param>
+        /// <param name="data">data to send to window</param>
+        public static void Open(this IWindow window, IWindowSlot slot = null, object data = null)
+        {
+            if (slot != null)
+            {
+                slot.AttachWindow(window);
+                window.SetData(data);
+                return;
+            }
+
+            UiManager.Instance.CurrentArea.OpenWindow(window, data);
+        }
+        
+        /// <summary>
+        /// Opens window as child of selected area.
+        /// </summary>
+        /// <param name="window">window to open</param>
+        /// <param name="area">area to attach window</param>
+        /// <param name="data">data to send to window</param>
+        public static void Open(this IWindow window, IArea area, object data = null) => area.OpenWindow(window, data);
+        
+        /// <summary>
+        /// Open passed window as child of this window.
+        /// </summary>
+        /// <param name="window">parent window</param>
+        /// <param name="windowToOpen">window to open</param>
+        /// <param name="data">data to send to window</param>
+        public static void OpenChild(this IWindow window, IWindow windowToOpen, object data = null)
+        {
+            if (windowToOpen == null)
+            {
+                Debug.LogError($"Window to open cannot be null");
+                return;
+            }
+            window.OpenWindow(windowToOpen, data);
+        }
+        
+        /// <summary>
+        /// Open window as child of provided window. If <typeparamref name="parentWindow"/> is null, as child of current main window in <see cref="UiManager"/>. If there is no main window, open on current area.
+        /// </summary>
+        /// <param name="window">window to open</param>
+        /// <param name="parentWindow">parent window</param>
+        /// <param name="data">data to send to window</param>
+        public static void OpenAsChild(this IWindow window, IWindow parentWindow = null, object data = null)
+        {
+            if (parentWindow != null)
+            {
+                parentWindow.OpenWindow(window, data);
+                return;
+            }
+
+            if (UiManager.Instance.CurrentMainWindow != null)
+            {
+                UiManager.Instance.CurrentMainWindow.OpenWindow(window, data);
+                return;
+            }
+
+            UiManager.Instance.CurrentArea.OpenWindow(window, data);
+        }
+        
+        /// <summary>
+        /// Close window.
+        /// </summary>
+        /// <param name="window">window to close</param>
+        public static void Close(this IWindow window) => window.Parent.DetachWindow(window);
+    }
+}

NEG/UI/Window/IWindow.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: c68ab5f7e5d9440e9fbd26307211e8f1
+timeCreated: 1670690267

NEG/UI/WindowSlot.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: 1f54322bf2ce451dbfccb7c41e89dd62
+timeCreated: 1670707801

NEG/UI/WindowSlot/ISlotsHolder.cs

@@ -0,0 +1,25 @@
+using NEG.UI.Window;
+using System.Collections.Generic;
+
+namespace NEG.UI.WindowSlot
+{
+    public interface ISlotsHolder
+    {
+        IEnumerable<IWindowSlot> AvailableSlots { get; }
+
+        /// <summary>
+        /// Open window
+        /// </summary>
+        /// <param name="window"></param>
+        /// <param name="data"></param>
+        void OpenWindow(IWindow window, object data = null);
+
+        void CloseAllWindows()
+        {
+            foreach (var slot in AvailableSlots)
+            {
+                slot.CloseAllWindows();
+            }
+        }
+    }
+}

NEG/UI/WindowSlot/ISlotsHolder.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: ace3899aabb0491d80f8b17bd827854b
+timeCreated: 1674408955

NEG/UI/WindowSlot/IWindowSlot.cs

@@ -0,0 +1,14 @@
+using NEG.UI.Area;
+using NEG.UI.Window;
+
+namespace NEG.UI.WindowSlot
+{
+    public interface IWindowSlot
+    {
+        bool OpenWindowAsMain { get; }
+        ISlotsHolder ParentHolder { get; }
+        void AttachWindow(IWindow window);
+        void DetachWindow(IWindow window);
+        void CloseAllWindows();
+    }
+}

NEG/UI/WindowSlot/IWindowSlot.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: f4f7edf281324a2ba86f4099eff57552
+timeCreated: 1670694831