App_win_iot_V2.0/IOTContainer/ViewModel/TouchMeViewModel.cs

using IOTContainer.Common;
using IOTContainer.Model;
using IOTContainer.MvvmBase;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Media;

namespace IOTContainer.ViewModel
{
    public class TouchMeViewModel: ViewModelBase
    {
        /// <summary>
        /// 顶部字幕
        /// </summary>
        private string _topText;
        public string TopText
        {
            get { return _topText; }
            set { base.SetProperty(ref _topText, value, "TopText"); }
        }
        /// <summary>
        /// 顶部字幕颜色
        /// </summary>
        private SolidColorBrush _topColor;
        public SolidColorBrush TopColor
        {
            get { return _topColor; }
            set { base.SetProperty(ref _topColor, value, "TopColor"); }
        }
        /// <summary>
        /// 顶部字幕大小
        /// </summary>
        private int _topSize;
        public int TopSize
        {
            get { return _topSize; }
            set { base.SetProperty(ref _topSize, value, "TopSize"); }
        }
        /// <summary>
        /// 底部字幕
        /// </summary>
        private string _bottomText;
        public string BottomText
        {
            get { return _bottomText; }
            set { base.SetProperty(ref _bottomText, value, "BottomText"); }
        }
        /// <summary>
        /// 底部字幕颜色
        /// </summary>
        private SolidColorBrush _bottomColor;
        public SolidColorBrush BottomColor
        {
            get { return _bottomColor; }
            set { base.SetProperty(ref _bottomColor, value, "BottomColor"); }
        }
        /// <summary>
        /// 底部字幕大小
        /// </summary>
        private int _bottomSize;
        public int BottomSize
        {
            get { return _bottomSize; }
            set { base.SetProperty(ref _bottomSize, value, "BottomSize"); }
        }

        private bool _topIsEmpty;
        private bool _bottomIsEmpty;

        public TouchMeViewModel()
        {
            try
            {
                #region 字幕相关
                TopText = "";
                TopColor = new SolidColorBrush(Colors.White);
                TopSize = 16;
                BottomText = "";
                BottomColor = new SolidColorBrush(Colors.White);
                BottomSize = 16;
                Task.Run(() => { PlayTopSubtitle(); });
                Task.Run(() => { PlayBottomSubtitle(); });
                #endregion
            }
            catch (Exception e)
            {
                Log.MyLog.WriteLogFile("字幕播放出错：" + e.Message);
            }
        }

        /// <summary>
        /// 播放顶部字幕
        /// </summary>
        public void PlayTopSubtitle()
        {
            while (ComParameters.Parameters.IsPlay)
            {
                try
                {
                    if (ComParameters.Parameters.PlaySubtitleToken == null || !ComParameters.Parameters.PlaySubtitleToken.Token.IsCancellationRequested)
                    {
                        Task.Run(() => HttpComm.Http.GetSubtitle());
                    }
                    var basePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Programme");
                    var filePath = Path.Combine(basePath, "SubtitleList.txt");
                    ComParameters.srwl.EnterReadLock();
                    var subcontent = FileManage.ReadJsonFile(filePath);
                    ComParameters.srwl.ExitReadLock();
                    if (!string.IsNullOrEmpty(subcontent) && subcontent != "[]")//列表不为空
                    {
                        var subList = JsonConvert.DeserializeObject<List<SubtitleModel>>(subcontent);
                        var now = DateTime.Now;
                        subList = subList.Where(p => p.startTime <= now && p.endTime >= now && p.newsLoca == 1).ToList();
                        if (!subList.Any())//列表为空
                        {
                            _topIsEmpty = true;
                            if (_bottomIsEmpty)
                            {
                                ComParameters.Parameters.SubListIsEmpty = true;
                            }
                            Task.Delay(ComParameters.Parameters.waitMilliseconds).Wait();
                        }
                        else
                        {
                            if (ComParameters.Parameters.PlaySubtitleToken != null)
                            {
                                ComParameters.Parameters.PlaySubtitleToken.Dispose();
                            }
                            ComParameters.Parameters.PlaySubtitleToken = new CancellationTokenSource();
                            foreach (var item in subList)
                            {
                                try
                                {
                                    //设置顶部字幕
                                    if (null != ComParameters.Parameters.ScreenWindow)
                                    {
                                        ComParameters.Parameters.ScreenWindow.Dispatcher.Invoke(() =>
                                        {
                                            TopText = item.newsText;
                                            TopColor = new SolidColorBrush((Color)ColorConverter.ConvertFromString(item.fontColor));
                                            TopSize = item.fontSize;
                                        });
                                    }

                                    if (!ComParameters.Parameters.PlaySubtitleToken.Token.IsCancellationRequested)
                                    {
                                        try
                                        {
                                            Task.Delay(200).Wait();
                                            //通过可取消标记 通知是否取消当前方法
                                            Task.Delay(TimeSpan.FromSeconds(ComParameters.Parameters.TopTotalWidth / (double)ComParameters.Parameters.subtitleSpeed), ComParameters.Parameters.PlaySubtitleToken.Token).Wait();
                                            TopText = "";
                                        }
                                        catch (Exception)//收到取消信号
                                        {
                                            var task = Task.Run(() =>
                                            {
                                                HttpComm.Http.GetSubtitle();
                                            });
                                            task.Wait();
                                            TopText = "";
                                            break;
                                        }
                                    }
                                    else//收到取消信号
                                    {
                                        var task = Task.Run(() =>
                                        {
                                            HttpComm.Http.GetSubtitle();
                                        });
                                        task.Wait();
                                        TopText = "";
                                        break;
                                    }
                                }
                                catch (Exception suex)
                                {
                                    Log.MyLog.WriteLogFile("顶部字幕播放失败：" + suex);
                                }
                            }
                        }
                    }
                    else
                    {
                        _topIsEmpty = true;
                        _bottomIsEmpty = true;
                        ComParameters.Parameters.SubListIsEmpty = true;
                        Task.Delay(ComParameters.Parameters.waitMilliseconds).Wait();
                    }
                }
                catch (Exception ex)
                {
                    Log.MyLog.WriteLogFile("顶部字幕播放失败：" + ex);
                }
            }
        }
        /// <summary>
        /// 播放底部字幕
        /// </summary>
        public void PlayBottomSubtitle()
        {
            while (ComParameters.Parameters.IsPlay)
            {
                try
                {
                    var basePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Programme");
                    var filePath = Path.Combine(basePath, "SubtitleList.txt");
                    ComParameters.srwl.EnterReadLock();
                    var subcontent = FileManage.ReadJsonFile(filePath);
                    ComParameters.srwl.ExitReadLock();
                    if (!string.IsNullOrEmpty(subcontent) && subcontent != "[]")//列表为空
                    {
                        var subList = JsonConvert.DeserializeObject<List<SubtitleModel>>(subcontent);
                        var now = DateTime.Now;
                        subList = subList.Where(p => p.startTime <= now && p.endTime >= now && p.newsLoca == 2).ToList();
                        if (!subList.Any())//列表为空
                        {
                            _bottomIsEmpty = true;
                            if (_topIsEmpty)
                            {
                                ComParameters.Parameters.SubListIsEmpty = true;
                            }
                            Task.Delay(ComParameters.Parameters.waitMilliseconds).Wait();
                        }
                        else
                        {
                            if (ComParameters.Parameters.PlaySubtitleToken != null)
                            {
                                ComParameters.Parameters.PlaySubtitleToken.Dispose();
                            }
                            ComParameters.Parameters.PlaySubtitleToken = new CancellationTokenSource();
                            foreach (var item in subList)
                            {
                                try
                                {
                                    if (null != ComParameters.Parameters.ScreenWindow)
                                    {
                                        ComParameters.Parameters.ScreenWindow.Dispatcher.Invoke(() =>
                                        {
                                            BottomText = item.newsText;
                                            BottomColor = new SolidColorBrush((Color)ColorConverter.ConvertFromString(item.fontColor));
                                            BottomSize = item.fontSize;
                                        });
                                    }

                                    if (!ComParameters.Parameters.PlaySubtitleToken.Token.IsCancellationRequested)
                                    {
                                        try
                                        {
                                            Task.Delay(200).Wait();
                                            //通过可取消标记 通知是否取消当前方法
                                            Task.Delay(TimeSpan.FromSeconds(ComParameters.Parameters.BottomTotalWidth / (double)ComParameters.Parameters.subtitleSpeed), ComParameters.Parameters.PlaySubtitleToken.Token).Wait();
                                            BottomText = "";
                                        }
                                        catch (Exception)//收到取消信号
                                        {
                                            var task = Task.Run(() =>
                                            {
                                                HttpComm.Http.GetSubtitle();
                                            });
                                            task.Wait();
                                            BottomText = "";
                                            break;
                                        }
                                    }
                                    else//收到取消信号
                                    {
                                        var task = Task.Run(() =>
                                        {
                                            HttpComm.Http.GetSubtitle();
                                        });
                                        task.Wait();
                                        BottomText = "";
                                        break;
                                    }
                                }
                                catch (Exception suex)
                                {
                                    Log.MyLog.WriteLogFile("底部字幕播放失败：" + suex);
                                }
                            }
                        }
                    }
                    else
                    {
                        _topIsEmpty = true;
                        _bottomIsEmpty = true;
                        ComParameters.Parameters.SubListIsEmpty = true;
                        Task.Delay(ComParameters.Parameters.waitMilliseconds).Wait();
                    }
                }
                catch (Exception ex)
                {
                    Log.MyLog.WriteLogFile("底部字幕播放失败：" + ex);
                }
            }
        }
    }
}