Instrument band support, submodule update to 138.0.0 (#17995)

Content.Client/Instruments/UI/ChannelsMenu.xaml.cs

@@ -0,0 +1,66 @@
+using Robust.Client.AutoGenerated;
+using Robust.Client.UserInterface.Controls;
+using Robust.Client.UserInterface.CustomControls;
+using Robust.Client.UserInterface.XAML;
+using Robust.Shared.Audio.Midi;
+using Robust.Shared.Timing;
+
+namespace Content.Client.Instruments.UI;
+
+[GenerateTypedNameReferences]
+public sealed partial class ChannelsMenu : DefaultWindow
+{
+    private readonly InstrumentBoundUserInterface _owner;
+
+    public ChannelsMenu(InstrumentBoundUserInterface owner) : base()
+    {
+        RobustXamlLoader.Load(this);
+        _owner = owner;
+
+        ChannelList.OnItemSelected += OnItemSelected;
+        ChannelList.OnItemDeselected += OnItemDeselected;
+        AllButton.OnPressed += OnAllPressed;
+        ClearButton.OnPressed += OnClearPressed;
+    }
+
+    private void OnItemSelected(ItemList.ItemListSelectedEventArgs args)
+    {
+        _owner.Instruments.SetFilteredChannel(_owner.Owner, (int)ChannelList[args.ItemIndex].Metadata!, false);
+    }
+
+    private void OnItemDeselected(ItemList.ItemListDeselectedEventArgs args)
+    {
+        _owner.Instruments.SetFilteredChannel(_owner.Owner, (int)ChannelList[args.ItemIndex].Metadata!, true);
+    }
+
+    private void OnAllPressed(BaseButton.ButtonEventArgs obj)
+    {
+        foreach (var item in ChannelList)
+        {
+            // TODO: Make this efficient jfc
+            item.Selected = true;
+        }
+    }
+
+    private void OnClearPressed(BaseButton.ButtonEventArgs obj)
+    {
+        foreach (var item in ChannelList)
+        {
+            // TODO: Make this efficient jfc
+            item.Selected = false;
+        }
+    }
+
+    public void Populate()
+    {
+        ChannelList.Clear();
+
+        for (int i = 0; i < RobustMidiEvent.MaxChannels; i++)
+        {
+            var item = ChannelList.AddItem(_owner.Loc.GetString("instrument-component-channel-name",
+                ("number", i)), null, true, i);
+
+            item.Selected = !_owner.Instrument?.FilteredChannels[i] ?? false;
+        }
+    }
+}