Add button click and checkbox toggle handlers for UI controls

UI/GUI/UIEelements/Controls/Button.cs

@@ -18,8 +18,11 @@ public class Button() : Control("Button")
         set => SetProperty(nameof(TextColor), ref field, value);
     } = Color.Black;
 
-    public void Click()
+    public override void HandleMouseEvent(MouseEvent mouseEvent)
     {
-        OnClick?.Invoke(this, EventArgs.Empty);
+        if (mouseEvent.Type == MouseEventType.ButtonDown && mouseEvent.Button == MouseButton.Left)
+        {
+            OnClick?.Invoke(this, EventArgs.Empty);
+        }
     }
 }

UI/GUI/UIEelements/Controls/CheckBox.cs

@@ -27,4 +27,12 @@ public class CheckBox() : Control("CheckBox")
         get;
         set => SetProperty(nameof(TextColor), ref field, value);
     } = Color.White;
+
+    public override void HandleMouseEvent(MouseEvent mouseEvent)
+    {
+        if (mouseEvent.Type == MouseEventType.ButtonDown && mouseEvent.Button == MouseButton.Left)
+        {
+            IsChecked = !IsChecked;
+        }
+    }
 }

UI/GUI/Windows/Window.cs

@@ -107,9 +107,9 @@ public sealed class Window(string title, int processId, int id, IRenderSource re
             uiElements.Add(uiElementId, uiElement);
         }
 
-        lock (controlsLock)
+        if (uiElement is Control control)
         {
-            if (uiElement is Control control)
+            lock (controlsLock)
             {
                 controls.Add(uiElementId, control);
             }

UI/GUI/Windows/WindowManager.cs

@@ -57,20 +57,20 @@ public static class WindowManager
             activeInteractWindow = null;
         }
 
-        wasLeftButtonDown = leftButtonDown;
-        wasRightButtonDown = rightButtonDown;
-        wasMiddleButtonDown = middleButtonDown;
-
         while (KeyboardManager.TryReadKey(out KeyEvent? keyEvent) && keyEvent is not null)
         {
             focusedWindow?.HandleKeyEvent(keyEvent);
         }
 
-        if (focusedWindow is not null && activeInteractWindow is null)
+        if (focusedWindow is not null)
         {
             DispatchMouseEvents(focusedWindow, pointerPosition);
         }
 
+        wasLeftButtonDown = leftButtonDown;
+        wasRightButtonDown = rightButtonDown;
+        wasMiddleButtonDown = middleButtonDown;
+
         CanvasRenderSource.CompositeAndDisplay(canvas, pointerPosition);
 
         lastPointerPosition = pointerPosition;