AIKKEY_WPFWin7/ViewModels/CommonViewModel/VideoPlayerViewModel.cs

using AIK.Models.VideoModels;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using CommunityToolkit.Mvvm.Messaging;
using CommunityToolkit.Mvvm.Messaging.Messages;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace AIK.ViewModels.CommonViewModel
{
    public partial class VideoPlayerViewModel : ObservableObject, IDisposable
    {
        [ObservableProperty]
        private string _videoTitle = "视频演示";

        [ObservableProperty]
        private string _videoPath = string.Empty;

        [ObservableProperty]
        private bool _isPlaying = false;

        [ObservableProperty]
        private double _progress = 0;

        [ObservableProperty]
        private string _currentTime = "00:00";

        [ObservableProperty]
        private string _totalTime = "00:00";

        [ObservableProperty]
        private double _volume = 0.7;

        [ObservableProperty]
        private bool _isMuted = false;

        public Action CloseAction { get; set; }
        public Action<double> ProgressChanged { get; set; }
        private bool _disposed = false;

        [RelayCommand]
        private void PlayPause()
        {
            IsPlaying = !IsPlaying;
            // 实际播放控制逻辑在View中通过MediaElement实现
            if (IsPlaying)
            {
                Play();
            }
            else
            {
                Pause();
            }

        }

        [RelayCommand]
        private void ToggleMute()
        {
            IsMuted = !IsMuted;
            // 音量控制逻辑在View中实现
        }

        [RelayCommand]
        private void ToggleFullScreen()
        {
            // 全屏逻辑可以在Window中实现
            WeakReferenceMessenger.Default.Send(new VideoControlMessage
            {
                Action = VideoControlMessage.ControlAction.ToggleFullScreen
            });
        }

        [RelayCommand]
        private void Close()
        {
            this.IsMuted = true;
            this.IsPlaying = false;
            CloseAction?.Invoke();
        }

        partial void OnProgressChanged(double value)
        {
            // 进度变化时更新播放位置（在View中处理）
            ProgressChanged?.Invoke(value);
        }

        partial void OnVolumeChanged(double value)
        {
            // 音量变化时发送消息给View更新MediaElement
            WeakReferenceMessenger.Default.Send(new VolumeChangedMessage
            {
                Volume = value,
                IsMuted = IsMuted
            });

            // 如果音量变为0且不是静音状态，自动静音
            if (value <= 0 && !IsMuted)
            {
                IsMuted = true;
            }
        }
        public void SetVideoUrl(string videoUrl)
        {
            VideoPath = videoUrl;
        }
        #region 外部控制方法
        public void Play()
        {
            IsPlaying = true;
            WeakReferenceMessenger.Default.Send(new VideoControlMessage
            {
                Action = VideoControlMessage.ControlAction.Play
            });
        }

        public void Pause()
        {
            IsPlaying = false;
            WeakReferenceMessenger.Default.Send(new VideoControlMessage
            {
                Action = VideoControlMessage.ControlAction.Pause
            });
        }

        public void Stop()
        {
            IsPlaying = false;
            WeakReferenceMessenger.Default.Send(new VideoControlMessage
            {
                Action = VideoControlMessage.ControlAction.Stop
            });
        }

        public void Seek(TimeSpan position)
        {
            WeakReferenceMessenger.Default.Send(new VideoControlMessage
            {
                Action = VideoControlMessage.ControlAction.Seek,
                Position = position
            });
        }
        public void SetVolume(int volumePercent)
        {
            // 设置音量百分比（0-100）
            Volume = Math.Max(0, Math.Min(100, volumePercent)) / 100.0;
        }
        #endregion

        #region IDisposable 实现
        public void Dispose()
        {
            //Dispose(true);
            GC.SuppressFinalize(this);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (!_disposed)
            {
                if (disposing)
                {
                    //// 清理托管资源
                    //CloseAction = null;
                    //ProgressChanged = null;

                    //// 取消所有消息订阅
                    //WeakReferenceMessenger.Default.UnregisterAll(this);
                }

                _disposed = true;
            }
        }
        #endregion
    }
}