From d7e6fc6edcbc50ae96e91c9036e5304b7e3c8adf Mon Sep 17 00:00:00 2001
From: rezazfn <s10256015@connect.np.edu.sg>
Date: Sat, 30 Nov 2024 15:54:45 +0800
Subject: [PATCH] game(scripts): main menu manager

---
 Game/Assets/Scripts/MenuManager.cs      | 107 ++++++++++++++++++++++++
 Game/Assets/Scripts/MenuManager.cs.meta |  11 +++
 2 files changed, 118 insertions(+)
 create mode 100644 Game/Assets/Scripts/MenuManager.cs
 create mode 100644 Game/Assets/Scripts/MenuManager.cs.meta

diff --git a/Game/Assets/Scripts/MenuManager.cs b/Game/Assets/Scripts/MenuManager.cs
new file mode 100644
index 0000000..a90a7c3
--- /dev/null
+++ b/Game/Assets/Scripts/MenuManager.cs
@@ -0,0 +1,107 @@
+/*
+* Author: Reza
+* Date: 30/11/2024
+* Description: Contains main menu functions like Start, Quit, and changes panels when setting
+and How To Play buttons are pressed.
+*/
+
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+using UnityEngine.UI;
+using TMPro;
+
+public class MenuManager : MonoBehaviour
+{
+    /// <summary>
+    /// UI and audio references
+    /// </summary>
+    public GameObject mainMenuPanel;
+    public GameObject howToPlayPanel;
+    public GameObject settingsPanel;
+    public AudioSource backgroundMusicSource;
+    public Slider volumeSlider;
+
+    private void Awake()
+    {
+        // Set initial slider value
+        if (volumeSlider != null && backgroundMusicSource != null)
+        {
+            volumeSlider.value = backgroundMusicSource.volume;
+        }
+
+        // Listener to the slider's value change event
+        volumeSlider.onValueChanged.AddListener(OnVolumeSliderChanged);
+    }
+
+    // Start is called before the first frame update
+    void Start()
+    {
+        howToPlayPanel.SetActive(false);
+        settingsPanel.SetActive(false);
+    }
+
+    /// <summary>
+    /// Main menu button functions 
+    /// </summary>
+    //When start button is pressed
+    public void StartGame()
+    {
+        SceneManager.LoadScene(1);
+    }
+
+    //When "?" button is pressed, show only how to play panel
+    public void HowToPlay()
+    {
+        mainMenuPanel.SetActive(false);
+        howToPlayPanel.SetActive(true);
+        settingsPanel.SetActive(false);
+    }
+
+    //When settings button is pressed, show only settings panel
+    public void Settings()
+    {
+        mainMenuPanel.SetActive(false);
+        howToPlayPanel.SetActive(false);
+        settingsPanel.SetActive(true);
+    }
+
+    //When quit button is pressed, game closes
+    public void QuitGame()
+    {
+        Application.Quit();
+    }
+
+    //When back button is pressed, shows only main menu
+    public void Back()
+    {
+        mainMenuPanel.SetActive(true);
+        howToPlayPanel.SetActive(false);
+        settingsPanel.SetActive(false);
+    }
+
+    /// <summary>
+    /// Set volume for BG music 
+    /// </summary>
+    /// <param name="volume"></param>
+    public void SetVolume(float volume)
+    {
+        if (backgroundMusicSource != null)
+        {
+            backgroundMusicSource.volume = volume;
+        }
+    }
+
+    /// <summary>
+    /// When volume slider value changes, this function is called
+    /// </summary>
+    /// <param name="value"></param>
+    private void OnVolumeSliderChanged(float value)
+    {
+        if (backgroundMusicSource != null)
+        {
+            backgroundMusicSource.volume = value;
+        }
+    }
+}
diff --git a/Game/Assets/Scripts/MenuManager.cs.meta b/Game/Assets/Scripts/MenuManager.cs.meta
new file mode 100644
index 0000000..a3bac0e
--- /dev/null
+++ b/Game/Assets/Scripts/MenuManager.cs.meta
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 703195f04468f364db1bbdc8d95a0528
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
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