ND_SimulationAutomaticControl/Assets/Scripts/UI/UIPanel/UI_VideoPanel.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;
using UnityEngine.Video;

/// <summary>
/// 视屏播放面板
/// </summary>
public class UI_VideoPanel : BasePanel
{
    public CanvasGroup canvasGroup; //屏幕显示
    private GameObject Player;
    public Button CloseBtn; //外围关闭按钮
    
    [Header("播放")]
    public Button UpPauseBtn; //中间暂停按钮
    public Button DownPauseBtn; //下方暂停按钮
    public Slider VolumeSlider; //音量进度条
    public Sprite[] PauseOrPlaySprite;
    public VideoPlayer VideoPlayer; //视屏播放 

    [Header("音量")] 
    public Button SourceBtn; //音量Btn
    public AudioSource audioSource;
    public Sprite[] volumeOffOrOn; //声音图标
    
    private bool isMuted = false;
    private float lastVolume = 1f;
    private bool isDragging = false;
    //public Button Btn
    protected override void Awake()
    {
        base.Awake();
        OnInit();
    }

    public void OnInit()
    {
        canvasGroup = GetComponent<CanvasGroup>();
        canvasGroup.alpha = 0f; // 默认隐藏
        canvasGroup.interactable = false;
        canvasGroup.blocksRaycasts = false;
        // ===== 音频绑定 =====
        VideoPlayer.audioOutputMode = VideoAudioOutputMode.AudioSource;
        VideoPlayer.SetTargetAudioSource(0, audioSource);
        SourceBtn = GetControl<Button>("音量Btn");
        DownPauseBtn = GetControl<Button>("下方暂停Btn");
        
        Player = GameObject.FindGameObjectWithTag("Player");
    }
    
    public override void ShowMe()
    {
        base.ShowMe();
        FadeIn(0.5f);
        Player = GameObject.FindGameObjectWithTag("Player");
    }

    public override void HideMe()
    {
        base.HideMe();
        FadeOut(0.5f);
    }
    protected override void OnClick(string btnPath)
    {
        base.OnClick(btnPath);
        switch (btnPath)
        {
            case "CloseBtn":
                FadeOut(0.5f);
                //Player.GetComponent<FirstPersonController>().enabled = true;
                break;
            case "中间暂停按钮":
                Debug.Log("中间暂停按钮");
                PlayOrPause();
                break;
            case "下方暂停Btn":
                Debug.Log("下方暂停Btn");
                PlayOrPause();
                break;
            case "音量Btn":
                Debug.Log("音量Btn");
                if (isMuted)
                {
                    VolumeSlider.value = 0;
                }
                else
                {
                    VolumeSlider.value = VolumeSlider.maxValue;
                }
                UpdateVolumeIcon();
                break;
        }
    }
    
    protected override void OnChangeSlider(string sliderPath, float value)
    {
        base.OnChangeSlider(sliderPath, value);
        switch (sliderPath)
        {
            case "进度条Slider":
                Debug.Log("进度条Slider");
                break;
            case "音量Slider":
                Debug.Log("音量Slider");
                audioSource.volume = value;
                if (value > 0)
                {
                    isMuted = false;
                    lastVolume = value;
                }
                UpdateVolumeIcon();
                break;
        }
    }
    
    /// <summary>
    /// 声音图标（静音）
    /// </summary>
    void UpdateVolumeIcon()
    {
        Image volumeIcon = SourceBtn.GetComponent<Image>();
        volumeIcon.sprite = audioSource.volume == 0 ? volumeOffOrOn[0] : volumeOffOrOn[1];
    }

    /// <summary>
    /// 下方暂停按钮
    /// </summary>
    public void PlayOrPause()
    {
        if (VideoPlayer.isPlaying)
        {
            VideoPlayer.Pause();
        }
        else
        {
            VideoPlayer.Play();
        }

        UpdatePlayPauseIcon();
    }
    //暂停图标切换
    void UpdatePlayPauseIcon()
    {
        
        Image playPauseIcon = DownPauseBtn.GetComponent<Image>();
        playPauseIcon.sprite = VideoPlayer.isPlaying 
            ? PauseOrPlaySprite[0]   // 正在播放 → 显示“暂停”
            : PauseOrPlaySprite[1];  // 已暂停 → 显示“播放”
    }
    
    /// <summary>
    /// 渐显
    /// </summary>
    public void FadeIn(float time)
    {
        canvasGroup.DOFade(1f, time);
        canvasGroup.interactable = true;
        canvasGroup.blocksRaycasts = true;
    }

    /// <summary>
    /// 渐隐
    /// </summary>
    public void FadeOut(float time)
    {
        canvasGroup.DOFade(0f, time);
        canvasGroup.interactable = false;
        canvasGroup.blocksRaycasts = false;
    }
}