working on openning and closing files

src/ui/widgets/timeline.py

@@ -26,6 +26,10 @@ class TimelineRow(Horizontal):
         }
     }
     """
+    
+    def __init__(self, project_channel):
+        super().__init__()
+        self.project_channel = project_channel
 
 class Timeline(Vertical):
     DEFAULT_CSS = """
@@ -126,7 +130,7 @@ class Timeline(Vertical):
         
         with VerticalScroll(id="rows"):
             for channel in self.app.project.channels:
-                with TimelineRow() as row:
+                with TimelineRow(channel) as row:
                     
                     row.styles.width = self.bar_offset * self.app.project.song_length