initial commit

Assets/Scripts/UI/MainUIController.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace Platformer.UI
+{
+    /// <summary>
+    /// A simple controller for switching between UI panels.
+    /// </summary>
+    public class MainUIController : MonoBehaviour
+    {
+        public GameObject[] panels;
+
+        public void SetActivePanel(int index)
+        {
+            for (var i = 0; i < panels.Length; i++)
+            {
+                var active = i == index;
+                var g = panels[i];
+                if (g.activeSelf != active) g.SetActive(active);
+            }
+        }
+
+        void OnEnable()
+        {
+            SetActivePanel(0);
+        }
+    }
+}

Assets/Scripts/UI/MainUIController.cs.meta

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Assets/Scripts/UI/MetaGameController.cs

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+using Platformer.Mechanics;
+using Platformer.UI;
+using UnityEngine;
+
+namespace Platformer.UI
+{
+    /// <summary>
+    /// The MetaGameController is responsible for switching control between the high level
+    /// contexts of the application, eg the Main Menu and Gameplay systems.
+    /// </summary>
+    public class MetaGameController : MonoBehaviour
+    {
+        /// <summary>
+        /// The main UI object which used for the menu.
+        /// </summary>
+        public MainUIController mainMenu;
+
+        /// <summary>
+        /// A list of canvas objects which are used during gameplay (when the main ui is turned off)
+        /// </summary>
+        public Canvas[] gamePlayCanvasii;
+
+        /// <summary>
+        /// The game controller.
+        /// </summary>
+        public GameController gameController;
+
+        bool showMainCanvas = false;
+
+        void OnEnable()
+        {
+            _ToggleMainMenu(showMainCanvas);
+        }
+
+        /// <summary>
+        /// Turn the main menu on or off.
+        /// </summary>
+        /// <param name="show"></param>
+        public void ToggleMainMenu(bool show)
+        {
+            if (this.showMainCanvas != show)
+            {
+                _ToggleMainMenu(show);
+            }
+        }
+
+        void _ToggleMainMenu(bool show)
+        {
+            if (show)
+            {
+                Time.timeScale = 0;
+                mainMenu.gameObject.SetActive(true);
+                foreach (var i in gamePlayCanvasii) i.gameObject.SetActive(false);
+            }
+            else
+            {
+                Time.timeScale = 1;
+                mainMenu.gameObject.SetActive(false);
+                foreach (var i in gamePlayCanvasii) i.gameObject.SetActive(true);
+            }
+            this.showMainCanvas = show;
+        }
+
+        void Update()
+        {
+            if (Input.GetButtonDown("Menu"))
+            {
+                ToggleMainMenu(show: !showMainCanvas);
+            }
+        }
+
+    }
+}

Assets/Scripts/UI/MetaGameController.cs.meta

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