From e2106400b51b2d62b2beff2bdb775065b7ef5b11 Mon Sep 17 00:00:00 2001
From: Xevion <xevioni@yandex.com>
Date: Wed, 20 May 2020 17:09:08 -0500
Subject: [PATCH] makeshift system for moving UI elements back and forth using
 tweening, implemented about/title tweens and button behaviour for title
 screen

---
 Boids/Assets/Scripts/UIController.cs | 103 +++++++++++++++++++++++----
 1 file changed, 89 insertions(+), 14 deletions(-)

diff --git a/Boids/Assets/Scripts/UIController.cs b/Boids/Assets/Scripts/UIController.cs
index 51b21dd..0fd07e7 100644
--- a/Boids/Assets/Scripts/UIController.cs
+++ b/Boids/Assets/Scripts/UIController.cs
@@ -1,12 +1,19 @@
-using UnityEngine;
+using System;
+using UnityEngine;
 using UnityEngine.UI;
 
 public class UIController : MonoBehaviour {
+    public Canvas canvas;
+    public BoidController boidController;
+
+    // Main Title Screen Elements
     public Button startButton;
     public Button settingsButton;
-
+    public Button aboutButton;
     public Text titleText;
-    public BoidController boidController;
+
+    public RectTransform aboutPanel;
+    public Button aboutCloseButton;
 
     // Element Groups
     private GameObject[] _titleElements;
@@ -14,6 +21,13 @@ public class UIController : MonoBehaviour {
     private GameObject[] _aboutElements;
     private GameObject[] _adjustmentElements;
 
+    // Element Group
+    private bool _titleActive = true;
+    private bool _aboutActive = false;
+    private bool _settingsActive = false;
+    private bool _playActive = false;
+    private bool _adjustmentsActive = false;
+
     private UIStance _currentUI;
 
     private enum UIStance {
@@ -24,9 +38,15 @@ public class UIController : MonoBehaviour {
     }
 
     private void Start() {
+        // Basic variable setup
+        _currentUI = UIStance.Title;
+
         // Add event functions
         startButton.onClick.AddListener(OnStartButton);
-        settingsButton.onClick.AddListener(OnSettingsButton);
+        aboutButton.onClick.AddListener(OnAboutButton);
+        aboutCloseButton.onClick.AddListener(OnAboutClose);
+        
+        // settingsButton.onClick.AddListener(OnSettingsButton);
 
         // Organize all UI Game Objects
         _titleElements = new GameObject[]
@@ -39,20 +59,75 @@ public class UIController : MonoBehaviour {
 
     // Handle Start Button Clicking
     private void OnStartButton() {
-        // Move the Title Text up
-        startButton.interactable = settingsButton.interactable = false;
-        foreach (GameObject element in _titleElements) {
-            LeanTween
-                .move(element, element.transform.position + new Vector3(0, 500, 0), 1.2f)
-                .setEase(LeanTweenType.easeInCubic);
+        switch (_currentUI) {
+            case UIStance.Title: {
+                Debug.Log("Switching to Play Screen");
+                MoveTitleElements(true);
+                break;
+            }
+            // Shouldn't be processed
+            case UIStance.Play:
+            case UIStance.Settings:
+            case UIStance.About:
+                Debug.LogWarning($"User clicked Start Button out of Title Screen ({_currentUI})");
+                break;
         }
     }
 
-    private void SwitchScreen(UIStance next) {
-        
+    // Move Title Elements In/Out
+    private void MoveTitleElements(bool away) {
+        foreach (GameObject element in _titleElements) {
+            LeanTween
+                .move(element, element.transform.position + new Vector3(0, 500 * (away ? 1 : -1), 0), 1f)
+                .setEase(LeanTweenType.easeInCubic);
+        }
+
+        LeanTween
+            .move(aboutButton.gameObject, aboutButton.transform.position + new Vector3(100 * (away ? 1 : -1), 0, 0),
+                0.75f)
+            .setEase(LeanTweenType.easeInCubic);
     }
 
-    // Handle Settings Button Clicking
-    private void OnSettingsButton() {
+    // Move About Elements In/Out
+    private void MoveAboutElements(bool away) {
+        LeanTween
+            .move(aboutPanel.gameObject, aboutPanel.transform.position + new Vector3(760 * (away ? 1 : -1), 0, 0), 1.2f)
+            .setEase(LeanTweenType.easeInCubic);
+    }
+
+    // Handle switching to the About Screen
+    private void OnAboutButton() {
+        if (_currentUI == UIStance.Title) {
+            Debug.Log($"Screen Transition: {_currentUI} -> {UIStance.About}");
+            MoveAboutElements(false);
+            MoveTitleElements(true);
+            _currentUI = UIStance.About;
+        }
+    }
+
+    // Handle returning to the Title Screen, closing the About Screen
+    private void OnAboutClose() {
+        if (_currentUI == UIStance.About) {
+            Debug.Log($"Screen Transition: {_currentUI} -> {UIStance.Title}");
+            MoveAboutElements(true);
+            MoveTitleElements(false);
+            _currentUI = UIStance.Title;
+        }
+    }
+
+    private void SwitchToTitle() {
+        _currentUI = UIStance.Title;
+    }
+
+    private void SwitchToAbout() {
+        _currentUI = UIStance.About;
+    }
+
+    private void SwitchToSettings() {
+        _currentUI = UIStance.Settings;
+    }
+
+    private void SwitchToPlay() {
+        _currentUI = UIStance.Play;
     }
 }
\ No newline at end of file