Removing useless next and previous playback control.

1 files changed, 7 insertions, 5 deletions

diff --git a/docs/user_guide/eye_tracking_context/advanced_topics/context_definition.md b/docs/user_guide/eye_tracking_context/advanced_topics/context_definition.md
index 17dfea9..a543bc7 100644
--- a/docs/user_guide/eye_tracking_context/advanced_topics/context_definition.md
+++ b/docs/user_guide/eye_tracking_context/advanced_topics/context_definition.md
@@ -7,7 +7,7 @@ The [ArContext](../../../argaze.md/#argaze.ArFeatures.ArContext) class interface
 
 Besides, there is also a [DataCaptureContext](../../../argaze.md/#argaze.ArFeatures.DataCaptureContext) class that inherits from [ArContext](../../../argaze.md/#argaze.ArFeatures.ArContext) and that defines an abstract *calibrate* method to write specific device calibration process.
 
-In the same way, there is a [DataPlaybackContext](../../../argaze.md/#argaze.ArFeatures.DataPlaybackContext) class that inherits from [ArContext](../../../argaze.md/#argaze.ArFeatures.ArContext) and that defines abstract *previous* and *next* playback methods to move into record's frames and also defines *duration* and *progression* properties to get information about a record length and playback advancement.
+In the same way, there is a [DataPlaybackContext](../../../argaze.md/#argaze.ArFeatures.DataPlaybackContext) class that inherits from [ArContext](../../../argaze.md/#argaze.ArFeatures.ArContext) and that defines *duration* and *progression* properties to get information about a record length and playback advancement.
 
 Finally, a specific eye tracking context can be defined into a Python file by writing a class that inherits either from [ArContext](../../../argaze.md/#argaze.ArFeatures.ArContext), [DataCaptureContext](../../../argaze.md/#argaze.ArFeatures.DataCaptureContext) or [DataPlaybackContext](../../../argaze.md/#argaze.ArFeatures.DataPlaybackContext) class.
 
@@ -182,12 +182,14 @@ class DataPlaybackExample(ArFeatures.DataPlaybackContext):
 		# Stop playback threads
 		threading.Thread.join(self.__data_thread)
 
-	def previous(self):
-		"""Go to previous camera image frame."""
+	@property
+	def duration(self) -> int|float:
+		"""Get data duration."""
 		...
 
-	def next(self):
-		"""Go to next camera image frame."""
+	@property
+	def progression(self) -> float:
+		"""Get data playback progression between 0 and 1."""
 		...
 ```