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FNAF_Clone/GUI/Screen.cs

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+using System.Collections.Generic;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+using MonoGameLibrary.Input;
+
+namespace FNAF_Clone.GUI;
+
+
+public class Screen {
+    
+    public static Dictionary<string, Screen> Screens = new();
+    public static Screen CurrentScreen{ get; private set; }
+
+    public static void AddScreens((string id, Screen screen)[] screens) {
+        foreach (var tuple in screens){
+            Screens.Add(tuple.id, tuple.screen);
+        }
+    }
+    public static void AddScreen(string id, Screen screen, bool activate = false) {
+        Screens.Add(id, screen);
+        if (activate) SetScreen(id);
+    }
+    
+    public static void SetScreen(string id) {
+        CurrentScreen = Screens[id];
+        CurrentScreen.Active = true;
+    }
+    
+    public static void RemoveScreen(string id) {
+        Screens.Remove(id); 
+    }
+    
+    public enum ScreenType {
+        MAIN_MENU,
+        OFFICE,
+        CAMERAS
+    }
+    
+    
+    public ScreenType Type{ get; private set; }
+    private Dictionary<string, UIElement> elements = new();
+    public bool Active { get; private set; } = false;
+    private InputListenerHook mouseInputHook = new(true);
+    
+    public Screen(ScreenType type) {
+        Type = type;
+        InputManager.AddListener(InputManager.MouseButton.LEFT, () => ProcessMouseInput(InputManager.MouseState), InputTiming.PRESS, mouseInputHook);
+    }
+
+    public Screen(ScreenType type, Dictionary<string, UIElement> elements) {
+        this.elements = elements;
+        Type = type;
+    }
+
+    public void AddElement(string id, UIElement element) {
+        elements.Add(id, element);
+    }
+    
+    public void SetActive(bool active) {
+        Active = active;
+        if (Active == active) return;
+        foreach (var keyValuePair in elements){
+            keyValuePair.Value.Active = Active;
+        }
+        
+    }
+
+    private void ProcessMouseInput(MouseState mouseState) {
+        foreach (var element in elements.Values){
+            if (!element.Pressable) continue;
+            
+            if (element.IsWithinBounds(mouseState.Position)){
+                element.OnMousePress(); // TODO: differentiate between press, hold and release events
+            }
+        }
+    }
+
+    public void Update() {
+        
+        
+        foreach (var keyValuePair in elements){
+            keyValuePair.Value.Update();
+        }
+    }
+
+    public void Draw(SpriteBatch spriteBatch) {
+        foreach (var val in elements.Values){
+            val.Draw(spriteBatch);
+        }
+    }
+}

FNAF_Clone/GUI/UIElement.cs

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+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using MonoGameLibrary.Graphics;
+using MonoGameLibrary.Input;
+
+namespace FNAF_Clone.GUI;
+
+public class UIElement {
+    public bool Active { get; set; } = false;
+    public bool Pressable { get; set; } = false;
+
+    private (Point, Point) bounds; // TODO: Change this to support non-rectangular hitboxes
+    private TextureRegion texture;
+
+    public UIElement(TextureRegion texture, Point position) {
+        this.texture = texture;
+        bounds = (position, position + new Point(texture.Width, texture.Height));
+    }
+    public void Update() {
+        
+    }
+
+    public bool IsWithinBounds(Point pos) {
+        return pos.X >= Math.Min(bounds.Item1.X, bounds.Item2.X) && pos.X <= Math.Max(bounds.Item1.X, bounds.Item2.X) &&
+               pos.Y >= Math.Min(bounds.Item1.Y, bounds.Item2.Y) && pos.Y <= Math.Max(bounds.Item1.Y, bounds.Item2.Y);
+    }
+
+    public Action OnMousePress{ get; set; } 
+    
+    // public virtual void OnMousePress() { }
+    
+    public virtual void OnMouseRelease() { }
+    
+    public virtual void OnMouseHold() { }
+
+    public void Draw(SpriteBatch spriteBatch) {
+        texture.Draw(spriteBatch, bounds.Item1.ToVector2(), Color.White);
+    }
+}