From 58efd449a8ff72645cf56c2d75eaa2292fef1a8d Mon Sep 17 00:00:00 2001
From: dnesov <contact.dnesov@gmail.com>
Date: Tue, 24 Jun 2025 22:11:38 +0200
Subject: [PATCH] Set window state for Raylib, make Frame occupy full size of
 parent UIElement or window.

---
 Voile/Source/Rendering/RaylibRenderSystem.cs |  2 +-
 Voile/Source/Rendering/RenderSystem.cs       |  2 +-
 Voile/Source/UI/Containers/Container.cs      |  1 -
 Voile/Source/UI/Containers/Frame.cs          | 40 +++++++++++++++++++-
 Voile/Source/UI/UIElement.cs                 |  5 +++
 5 files changed, 46 insertions(+), 4 deletions(-)

diff --git a/Voile/Source/Rendering/RaylibRenderSystem.cs b/Voile/Source/Rendering/RaylibRenderSystem.cs
index 503c11f..82ca3b6 100644
--- a/Voile/Source/Rendering/RaylibRenderSystem.cs
+++ b/Voile/Source/Rendering/RaylibRenderSystem.cs
@@ -81,7 +81,7 @@ namespace Voile.Rendering
                 Raylib.InitWindow((int)_windowSize.X, (int)_windowSize.Y, windowSettings.Title);
             }
 
-            // Raylib.SetWindowState(windowFlags);
+            Raylib.SetWindowState(windowFlags);
         }
 
         // TODO
diff --git a/Voile/Source/Rendering/RenderSystem.cs b/Voile/Source/Rendering/RenderSystem.cs
index 5665369..58f330f 100644
--- a/Voile/Source/Rendering/RenderSystem.cs
+++ b/Voile/Source/Rendering/RenderSystem.cs
@@ -256,7 +256,7 @@ namespace Voile.Rendering
     {
         public string Title;
         public Vector2 Size = new Vector2(1280, 720);
-        public bool Resizable { get; set; }
+        public bool Resizable { get; set; } = true;
 
         public WindowSettings(string title, Vector2 size)
         {
diff --git a/Voile/Source/UI/Containers/Container.cs b/Voile/Source/UI/Containers/Container.cs
index 2c9645e..bb6c327 100644
--- a/Voile/Source/UI/Containers/Container.cs
+++ b/Voile/Source/UI/Containers/Container.cs
@@ -3,7 +3,6 @@ using Voile.Rendering;
 
 namespace Voile.UI.Containers;
 
-// TODO: make Container extend Widget, it already implements similar behaviors. 
 /// <summary>
 /// A base class for all UI containers, used to position and rendering child <see cref="IElement">s.
 /// </summary>
diff --git a/Voile/Source/UI/Containers/Frame.cs b/Voile/Source/UI/Containers/Frame.cs
index d00fc57..fcc4985 100644
--- a/Voile/Source/UI/Containers/Frame.cs
+++ b/Voile/Source/UI/Containers/Frame.cs
@@ -1,5 +1,10 @@
+using Voile.Rendering;
+
 namespace Voile.UI.Containers;
 
+/// <summary>
+/// A frame is a special container that occupies the entire available size of the parent.
+/// </summary>
 public class Frame : Container
 {
     public Frame()
@@ -9,11 +14,44 @@ public class Frame : Container
 
     public Frame(Rect minimumSize) : base(minimumSize)
     {
-        
+
     }
 
     public override void Arrange()
     {
 
     }
+
+    public override void Render(RenderSystem renderer, Style style)
+    {
+        base.Render(renderer, style);
+
+        Rect parentSize;
+
+        if (Parent != null)
+        {
+            parentSize = Parent.Size;
+        }
+        else
+        {
+            var windowSize = renderer.WindowSize;
+            var windowRect = new Rect(windowSize.X, windowSize.Y);
+
+            parentSize = windowRect;
+        }
+
+        if (_lastParentSize != parentSize)
+        {
+            Size = parentSize;
+            _lastParentSize = parentSize;
+        }
+    }
+
+    protected override void OnUpdate()
+    {
+        base.OnUpdate();
+        Size = _lastParentSize;
+    }
+
+    private Rect _lastParentSize = Rect.Zero;
 }
\ No newline at end of file
diff --git a/Voile/Source/UI/UIElement.cs b/Voile/Source/UI/UIElement.cs
index 6196ce2..29306ba 100644
--- a/Voile/Source/UI/UIElement.cs
+++ b/Voile/Source/UI/UIElement.cs
@@ -10,6 +10,11 @@ public abstract class UIElement : IElement, IRenderableElement, IResizeableEleme
     public Vector2 LocalPosition { get; set; } = Vector2.Zero;
     public Vector2 GlobalPosition => _parent?.GlobalPosition + LocalPosition ?? LocalPosition;
 
+    /// <summary>
+    /// Parent <see cref="UIElement"/> of this element.
+    /// </summary>
+    public UIElement? Parent => _parent;
+
     public Rect Size
     {
         get => _size;