you can drag things left and right and the mute and solo buttons update the ui now

src/song_player.py

@@ -18,7 +18,8 @@ class SongPlayer:
         self.timer = Timer(
             timeline,
             0.1,
-            pause=True
+            pause=True,
+            skip=False
         )
         
     def play_callback(self, out, frames, time, status):

src/ui/app.py

@@ -100,7 +100,27 @@ class AppUI(App):
                         
                     self.open_project_path = path
                     
-                    ### load all the ui elements
+                    ### load all the ui element
+                        
+                    # timeline tracks
+                    timeline = self.query_one(Timeline)
+                    rows = timeline.query_one("#rows")
+                    
+                    for i, channel in enumerate(self.project.channels):
+                        row = TimelineRow(channel, id=f"row-{i}")
+                        
+                            
+                        row.styles.width = timeline.bar_offset * self.project.song_length
+                        rows.mount(row)
+
+                        for chunk in channel.chunks:
+                            
+                            if chunk.chunk_type == ChunkType.CHUNK:
+                                row.mount(Chunk(chunk, chunk_name=chunk.name, bar_pos=chunk.position))
+                            elif chunk.chunk_type == ChunkType.AUDIO:
+                                row.mount(AudioChunk(chunk, chunk.name, chunk.position))
+                               
+                               
                     # sidebar channels
                     sidebar_channels = self.query_one("#channels")
                     
@@ -121,25 +141,6 @@ class AppUI(App):
                             channel.volume
                         ), before=-1) 
                     
-                    # timeline tracks
-                    timeline = self.query_one(Timeline)
-                    rows = timeline.query_one("#rows")
-                    
-                    for channel in self.project.channels:
-                        row = TimelineRow(channel)
-                        
-                            
-                        row.styles.width = timeline.bar_offset * self.project.song_length
-                        rows.mount(row)
-
-                        for chunk in channel.chunks:
-                            
-                            if chunk.chunk_type == ChunkType.CHUNK:
-                                row.mount(Chunk(chunk_name=chunk.name, bar_pos=chunk.position))
-                            elif chunk.chunk_type == ChunkType.AUDIO:
-                                row.mount(AudioChunk(chunk.audio_data, chunk.sample_rate, chunk.name, chunk.position))
-                                
-                    
                     self.notify(f"Loaded \"{path}\"")
                     
                 self.push_screen(FileOpen(
@@ -163,10 +164,12 @@ class AppUI(App):
             case _:
                 self.notify("Sorry, that isn't implemented yet... ;-;", severity="warning")
                 
+        
+        
     @on(Tabs.TabActivated)
     async def top_menu_tab_clicked(self, event: Tabs.TabActivated):
-        if self.first_tab_click:
         event.tabs.active = None
+        if self.first_tab_click:
             self.first_tab_click = False
             return
         

src/ui/screens/settings.py

@@ -102,7 +102,7 @@ class SettingsScreen(ModalScreen):
                         with HorizontalGroup(classes="setting"):
                             with VerticalGroup():
                                 yield Label("Colour Theme", classes="setting-name")
-                                yield Label("Colour theme used for the entire Berry app. You can get more themes with plugins!", classes="setting-desc")
+                                yield Label("Colour theme used for the entire app.", classes="setting-desc")
 
                             yield Select.from_values(
                                 (theme_name for theme_name in self.app._registered_themes.keys() if theme_name != "textual-ansi"),

src/ui/widgets/channel.py

@@ -57,15 +57,36 @@ class Channel(VerticalGroup):
         self.solo = solo
         self.pan = pan
         self.volume = volume
-        print(self.channel_name)
+        print("hi")
+        print(self.timeline_row)
+        
+    def on_mount(self):
+        if self.muted:
+            self.timeline_row.add_class("-muted")
+        if self.solo:
+            self.timeline_row.add_class("-solo")
+
+    @property
+    def timeline_row(self):
+        return self.app.query_one(f"#row-{self.channel_index}")
 
     def on_checkbox_changed(self, event: Checkbox.Changed):
         if event.checkbox.id == "mute":
             self.muted = event.value
+            self.project_channel.mute = self.muted
             
-            self.app.query_one("#timeline").query_one()
+            if self.muted:
+                self.timeline_row.add_class("-muted")
+            else:
+                self.timeline_row.remove_class("-muted")
         elif event.checkbox.id == "solo":
             self.solo = event.value
+            self.project_channel.solo = self.solo
+            
+            if self.solo:
+                self.timeline_row.add_class("-solo")
+            else:
+                self.timeline_row.remove_class("-solo")
         
     def on_slider_changed(self, event: Slider.Changed):
         if event.slider.id == "volume":

src/ui/widgets/chunk_types/audio.py

@@ -23,11 +23,11 @@ class AudioChunk(Chunk):
     }
     """
 
-    def __init__(self, audio_data: np.ndarray, sample_rate: int, chunk_name: str = "Sample", bar_pos: float = 0.0):
+    def __init__(self, project_chunk, chunk_name: str = "Sample", bar_pos: float = 0.0):
-        super().__init__(chunk_name, bar_pos)
+        super().__init__(project_chunk, chunk_name, bar_pos)
         
-        self.audio = audio_data
+        self.audio = project_chunk.audio_data
-        self.sample_rate = sample_rate
+        self.sample_rate = project_chunk.sample_rate
         
         self.num_channels = None
         if len(self.audio.shape) == 1:

src/ui/widgets/chunk_types/chunk.py

@@ -1,4 +1,9 @@
 from textual.containers import Container
+from textual import on, events
+from textual_window import Window
+from textual.widgets import Button
+
+from project import ChannelChunk
 
 
 class Chunk(Container):
@@ -11,16 +16,31 @@ class Chunk(Container):
         border: tab $surface;
         background: $surface-darken-1;
         dock: left;
+        
+        &:focus {
+            background-tint: $primary 25%;
+        }
+        
+        &.dragging {
+            background: $surface-lighten-1;
+        }
+        
+        
     }
     """
     
-    def __init__(self, chunk_name: str = "Chunk", bar_pos: float = 0.0):
+    can_focus = True
+    
+    def __init__(self, project_chunk: ChannelChunk, chunk_name: str = "Chunk", bar_pos: float = 0.0):
         super().__init__()
+        self.project_chunk = project_chunk
         self.chunk_name = chunk_name
         self.border_title = chunk_name
         self.bar_pos = bar_pos
         self.update_offset()
 
+        self.being_dragged = False
+        
     def update_offset(self, timeline=None):
         if timeline == None:
             timeline = self.app.query_one("#timeline")
@@ -28,3 +48,33 @@ class Chunk(Container):
         
     def calculate_size(self):
         pass
+    
+    @on(events.MouseMove)
+    def continue_drag(self, event: events.MouseUp):
+        if not self.being_dragged: return
+        
+        # move the widget in the ui
+        offset_x = self.styles.offset.x.cells + event.delta_x
+        self.styles.offset = (offset_x, 0)
+        
+        # update the backend as well
+        timeline = self.app.query_one("#timeline")
+        pos = offset_x / (timeline.bar_offset * 4)
+        
+        self.bar_pos = pos
+        self.project_chunk.position = pos
+    
+    @on(events.MouseUp)
+    def end_drag(self, event: events.MouseUp):
+        if event.button == 1:
+            self.being_dragged = False
+            self.remove_class("dragging")
+            self.release_mouse()
+    
+    @on(events.MouseDown)
+    def start_drag(self, event: events.MouseDown):
+        if event.button == 1:
+            self.being_dragged = True
+            self.add_class("dragging")
+            self.capture_mouse()
+            self.focus()

src/ui/widgets/sidebar.py

@@ -29,14 +29,4 @@ class Sidebar(Vertical):
     
     def compose(self) -> ComposeResult:
         with VerticalScroll(id="channels"):
-            for i, channel in enumerate(self.app.project.channels):
-                yield Channel(
-                    i,
-                    channel,
-                    channel.name,
-                    channel.mute,
-                    channel.solo,
-                    channel.pan,
-                    channel.volume
-                )
             yield Button("+ New Channel", variant="success", id="add-channel")

src/ui/widgets/timeline.py

@@ -18,17 +18,17 @@ class TimelineRow(Horizontal):
         margin-bottom: 1;
         
         &.-muted {
-            background: $error 25%;
+            background-tint: $background-darken-2 50%;
         }
         
         &.-solo {
-            background: $warning 25%;
+            background-tint: $warning 20%;
         }
     }
     """
     
-    def __init__(self, project_channel):
+    def __init__(self, project_channel, id: str | None = None):
-        super().__init__()
+        super().__init__(id=id)
         self.project_channel = project_channel
 
 class Timeline(Vertical):
@@ -139,18 +139,6 @@ class Timeline(Vertical):
         
         
         with VerticalScroll(id="rows"):
-            for channel in self.app.project.channels:
-                with TimelineRow(channel) as row:
-                    
-                    row.styles.width = self.bar_offset * self.app.project.song_length
-
-                    for chunk in channel.chunks:
-                        
-                        if chunk.chunk_type == ChunkType.CHUNK:
-                            yield Chunk(chunk_name=chunk.name, bar_pos=chunk.position)
-                        elif chunk.chunk_type == ChunkType.AUDIO:
-                            yield AudioChunk(chunk.audio_data, chunk.sample_rate, chunk.name, chunk.position)
-
             for i in range(1, self.app.project.song_length+1):
                 bar = None
                 if i % 4 == 0: