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Assets/AVProVideo/Demos/Common/MediaPlayerUI/OptionsVideoTrackPage.cs

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+using RenderHeads.Media.AVProVideo;
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.UI;
+
+public class OptionsVideoTrackPage : MonoBehaviour
+{
+	[Header("Media Player")]
+	[SerializeField] private MediaPlayer	_MediaPlayer;
+
+	[Header("Options Menu")]
+	[SerializeField] private OptionsMenu	_OptionsMenu;
+
+	[Header("Content")]
+	[SerializeField] private Transform		_Content;
+	[SerializeField] private RectTransform	_ScrollViewRectTransform;
+	[SerializeField] private RectTransform	_ViewportRectTransform;
+	[SerializeField] private GameObject		_VideoTrackLinePrefab;
+
+
+	private string	m_SetupForVideoPath;
+
+
+	private class CVideoTrackSet
+	{
+		public GameObject	m_LineGO	= null;
+	}
+	private List<CVideoTrackSet>	m_lVideoTrackSets		= new List<CVideoTrackSet>();
+
+
+    void Start()
+    {
+		UpdateSets();
+	}
+
+	void Update()
+    {
+		UpdateSets();
+	}
+
+	private void AddVideoTrackSet( string title, bool bEnabled )
+	{
+		GameObject newLineGO = GameObject.Instantiate( _VideoTrackLinePrefab, _Content );
+		if( newLineGO != null )
+		{
+			// Setup text
+			Transform titleTransform = newLineGO.transform.Find( "TitleText" );
+			Text titleText = ( titleTransform != null ) ? titleTransform.GetComponent<Text>() : null;
+			if( titleText != null )
+			{
+				titleText.text = title;
+			}
+
+			// Tick icon
+			if( bEnabled )
+			{
+				Transform tickIconTransform = newLineGO.transform.Find( "TickIcon" );
+				Image tickIconImage = ( tickIconTransform != null ) ? tickIconTransform.GetComponent<Image>() : null;
+				if( tickIconImage != null )
+				{
+					tickIconImage.enabled = true;
+				}
+			}
+
+			// On click
+			if( _OptionsMenu )
+			{
+				Button button = newLineGO.GetComponent<Button>();
+				if( button )
+				{
+					int iIndex = m_lVideoTrackSets.Count;
+					button.onClick.AddListener( delegate
+					{
+						_OptionsMenu.ChangeVideoTrack( iIndex );
+					} );
+				}
+			}
+
+			// Add it to the list
+			CVideoTrackSet cVideoTrackSet = new CVideoTrackSet();
+			cVideoTrackSet.m_LineGO = newLineGO;
+			m_lVideoTrackSets.Add( cVideoTrackSet );
+		}
+	}
+
+	public void UpdateSets()
+	{
+		if( _MediaPlayer != null && _MediaPlayer.Control.HasMetaData() )
+		{
+			if( m_SetupForVideoPath == null || !m_SetupForVideoPath.Equals( _MediaPlayer.MediaPath.Path ) )
+			{
+				m_SetupForVideoPath = _MediaPlayer.MediaPath.Path;
+
+				foreach( CVideoTrackSet videoTrackSet in m_lVideoTrackSets )
+				{
+					GameObject.Destroy( videoTrackSet.m_LineGO );
+					videoTrackSet.m_LineGO = null;
+				}
+
+				// Remove everything
+				m_lVideoTrackSets.Clear();
+
+				// Add all subtitle sets
+				foreach( VideoTrack videoTrack in _MediaPlayer.VideoTracks.GetVideoTracks() )
+				{
+					AddVideoTrackSet( videoTrack.DisplayName, false );
+				}
+
+				if( m_lVideoTrackSets.Count > 1 )
+				{
+					// Reposition everything
+					float fLineHeight = 40.0f;
+					float fTotalHeight = fLineHeight * m_lVideoTrackSets.Count;
+
+					RectTransform contentRectTransform = ( _Content != null ) ? _Content.GetComponent<RectTransform>() : null;
+					if( contentRectTransform != null )
+					{
+						contentRectTransform.sizeDelta = new Vector2( contentRectTransform.sizeDelta.x, fTotalHeight );
+					}
+
+					float fY = (fTotalHeight * 0.5f) - (fLineHeight * 0.5f);
+					foreach( CVideoTrackSet videoTrackSet in m_lVideoTrackSets )
+					{
+						RectTransform rectTransform = videoTrackSet.m_LineGO.GetComponent<RectTransform>();
+						if ( rectTransform )
+						{
+							rectTransform.anchoredPosition = new Vector2( 0.0f, fY );
+							fY -= fLineHeight;
+						}
+					}
+
+					if( _ViewportRectTransform && _ScrollViewRectTransform )
+					{
+						float fMaxHeight = 222.0f;
+
+						float fNewHeight = Mathf.Clamp( fTotalHeight, fLineHeight, fMaxHeight );
+						float fBottomPadding = 12.0f;
+
+						RectTransform rectTransform = transform.GetComponent<RectTransform>();
+						rectTransform.sizeDelta = new Vector2( rectTransform.sizeDelta.x, 60.0f + fNewHeight + fBottomPadding );
+
+						_ScrollViewRectTransform.sizeDelta = new Vector2( _ScrollViewRectTransform.sizeDelta.x, fNewHeight );
+						_ViewportRectTransform.sizeDelta = new Vector2( _ViewportRectTransform.sizeDelta.x, fNewHeight );
+					}
+				}
+
+				ChangeVideoTrack( _MediaPlayer.VideoTracks.GetVideoTracks().GetActiveTrackIndex(), false );
+			}
+		}
+	}
+
+	public void ChangeVideoTrack( int iTrackIndex, bool bSetTrack = true )
+	{
+		VideoTracks videoTracks = ( _MediaPlayer ) ? _MediaPlayer.VideoTracks.GetVideoTracks() : null;
+		if( videoTracks != null )
+		{
+			if( bSetTrack )
+			{
+				// Change video track on the media player
+				_MediaPlayer.VideoTracks.SetActiveVideoTrack( ( iTrackIndex > -1 && iTrackIndex < videoTracks.Count ) ? videoTracks[ iTrackIndex ] : null );
+			}
+
+			// Sort out UI
+			int iIndex = 0;
+			foreach ( CVideoTrackSet videoTrackSet in m_lVideoTrackSets )
+			{
+				Transform tickIconTransform = videoTrackSet.m_LineGO.transform.Find( "TickIcon" );
+				Image tickIconImage = ( tickIconTransform != null ) ? tickIconTransform.GetComponent<Image>() : null;
+				if ( tickIconImage != null )
+				{
+					tickIconImage.enabled = ( iIndex == iTrackIndex );
+				}
+
+				++iIndex;
+			}
+		}
+	}
+}