JD2022-TU1/main/tools/framework/JD.VideoPlayer/Project/AbstractVideoPad.cs

using System;
using System.Drawing;
using System.Windows.Forms;
using JD.Application.View.Actions;
using JD.Interfaces.Player;
using TeaBox.ObjectModel;


namespace JD.VideoPlayer.Project
{
    public abstract class AbstractVideoPad : AbstractPadContent
    {
        private readonly Control _control;
        private VideoControl _videoControl;
        private IPlayerProvider _playerProvider;

        protected AbstractVideoPad()
        {
            _control = new Panel { Dock = DockStyle.Fill };
            _control.HandleCreated += _control_HandleCreated;
            
            TeaBox.ObjectModel.Application.Main.Views.SelectedItemChanged += Views_SelectedItemChanged;
        }

        void _control_HandleCreated(object sender, EventArgs e)
        {
            Views_SelectedItemChanged(null, null);
        }

        public VideoControl VideoControl
        {
            get { return _videoControl; }
        }

        public override Control Control
        {
            get { return _control; }
        }

        public virtual IPlayerProvider PlayerProvider
        {
            get { return _playerProvider; }
            set
            {
                if (_playerProvider != null)
                {
                    _playerProvider.Player.TimeChanged -= TimeCursor_TimeChanged;
                    DeleteVideoControl();
                }

                _playerProvider = value;

                if (_playerProvider != null)
                {
                    InitializeVideoControl();
                    _playerProvider.Player.TimeChanged += TimeCursor_TimeChanged;
                }
            }
        }

        /// <summary>
        /// Initialize after the construction so that the object does not try to access uninitialized variables
        /// during the initialization.
        /// </summary>
        protected void Initialize()
        {
            PlayerProvider = GetPlayerProvider(TeaBox.ObjectModel.Application.Main.Views.SelectedItem);
        }

        protected override void Dispose(bool disposing)
        {
            // Detach events
            if (disposing)
            {
                PlayerProvider = null;
                TeaBox.ObjectModel.Application.Main.Views.SelectedItemChanged -= Views_SelectedItemChanged;
            }

            base.Dispose(disposing);
        }

        protected abstract PleoConductor Conductor { get; }
        
        protected virtual IPlayerProvider GetPlayerProvider(IView view)
        {
            return view as IPlayerProvider;
        }

        protected virtual VideoControl CreateVideoControl()
        {
            return new VideoControl { ForeColor = Color.White, Dock = DockStyle.Fill, VideoConductor = Conductor };
        }

        protected virtual void InitializeVideoControl()
        {
            _videoControl = CreateVideoControl();
            _videoControl.ForeColor = Color.White;
            _videoControl.VideoConductor = Conductor;
            _videoControl.Dock = DockStyle.Fill;
            _control.Controls.Add(_videoControl);
            Conductor.ReloadClip();
        }

        protected void DeleteVideoControl()
        {
            _videoControl.Dispose();
            _control.Controls.Clear();
        }

        protected abstract void UpdateConductors();

        protected virtual void Views_SelectedItemChanged(object sender, EventArgs e)
        {
            PlayerProvider = GetPlayerProvider(TeaBox.ObjectModel.Application.Main.Views.SelectedItem);
        }

        protected virtual void TimeCursor_TimeChanged(object sender, EventArgs e)
        {
            UpdateConductors();
        }

    }
}