Refactoring

Trying to find nice coding patterns as I'm learning Rust

Linux/.vscode/settings.json

@@ -1,4 +1,5 @@
 {
     "nixEnvSelector.nixFile": "${workspaceFolder}/shell.nix",
-    "files.trimTrailingWhitespace": true
+    "files.trimTrailingWhitespace": true,
+    "rust-analyzer.imports.granularity.group": "item"
 }

Linux/Cargo.lock

@@ -17,6 +17,8 @@ dependencies = [
  "rust-i18n",
  "serde",
  "serde_json",
+ "serialport",
+ "tracker",
 ]
 
 [[package]]
@@ -211,6 +213,12 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b6a852b24ab71dffc585bcb46eaf7959d175cb865a7152e35b348d1b2960422"
 
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06ea2b9bc92be3c2baa9334a323ebca2d6f074ff852cd1d7b11064035cd3868f"
+
 [[package]]
 name = "crc32fast"
 version = "1.4.2"
@@ -803,6 +811,16 @@ dependencies = [
  "hashbrown 0.14.5",
 ]
 
+[[package]]
+name = "io-kit-sys"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "617ee6cf8e3f66f3b4ea67a4058564628cde41901316e19f559e14c7c72c5e7b"
+dependencies = [
+ "core-foundation-sys",
+ "mach2",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.0"
@@ -868,6 +886,15 @@ version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
+[[package]]
+name = "mach2"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "19b955cdeb2a02b9117f121ce63aa52d08ade45de53e48fe6a38b39c10f6f709"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "memchr"
 version = "2.7.2"
@@ -909,6 +936,17 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "nix"
+version = "0.26.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "598beaf3cc6fdd9a5dfb1630c2800c7acd31df7aaf0f565796fba2b53ca1af1b"
+dependencies = [
+ "bitflags 1.3.2",
+ "cfg-if",
+ "libc",
+]
+
 [[package]]
 name = "normpath"
 version = "1.2.0"
@@ -1271,6 +1309,24 @@ dependencies = [
  "yaml-rust",
 ]
 
+[[package]]
+name = "serialport"
+version = "4.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de7c4f0cce25b9b3518eea99618112f9ee4549f974480c8f43d3c06f03c131a0"
+dependencies = [
+ "bitflags 2.5.0",
+ "cfg-if",
+ "core-foundation-sys",
+ "io-kit-sys",
+ "mach2",
+ "nix",
+ "regex",
+ "scopeguard",
+ "unescaper",
+ "winapi",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -1480,6 +1536,26 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "tracker"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce5c98457ff700aaeefcd4a4a492096e78a2af1dd8523c66e94a3adb0fdbd415"
+dependencies = [
+ "tracker-macros",
+]
+
+[[package]]
+name = "tracker-macros"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc19eb2373ccf3d1999967c26c3d44534ff71ae5d8b9dacf78f4b13132229e48"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.66",
+]
+
 [[package]]
 name = "triomphe"
 version = "0.1.12"
@@ -1491,6 +1567,15 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "unescaper"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c878a167baa8afd137494101a688ef8c67125089ff2249284bd2b5f9bfedb815"
+dependencies = [
+ "thiserror",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"

Linux/Cargo.toml

@@ -15,6 +15,8 @@ relm4-icons = "0.8.3"
 rust-i18n = "3.0.1"
 serde = { version = "1.0.203", features = ["derive"] }
 serde_json = "1.0.117"
+serialport = { version = "4.4.0", default-features = false }
+tracker = "0.2.2"
 
 [dependencies.min-rs]
 git = "https://github.com/MvRens/min-rs.git"

Linux/locales/devices/serial_min.yaml

@@ -4,3 +4,13 @@ devices:
   serial_min:
     name:
       en: Serial device using MIN protocol
+
+serial_min:
+  settings:
+    port:
+      label:
+        en: Serial port
+      custom:
+        en: Custom...
+    custom_port_placeholder:
+      en: e.g. /dev/ttyACM0

Linux/shell.nix

@@ -5,6 +5,7 @@
         gtk4
         graphene
         gdk-pixbuf
+        libudev-zero
     ];
 
     # For a reason I'm yet to find out, my VSCode terminal sets GDK_BACKEND to x11.

Linux/src/actions/pipewire/mod.rs

@@ -9,6 +9,6 @@ pub fn register(registry: &mut Registry<ActionRegistryItem>)
 {
     registry.register(ActionRegistryItem
     {
-        unique_id: UniqueId::new("pipewire.set_volume")
+        unique_id: UniqueId::from("pipewire.set_volume")
     });
 }

Linux/src/devices/emulator/emulatorwindow.rs

@@ -7,7 +7,7 @@ pub struct EmulatorWindow
 
 
 #[derive(Debug)]
-pub enum Msg
+pub enum EmulatorWindowMessage
 {
 }
 
@@ -16,7 +16,7 @@ pub enum Msg
 impl SimpleComponent for EmulatorWindow
 {
     type Init = ();
-    type Input = Msg;
+    type Input = EmulatorWindowMessage;
     type Output = ();
 
     view!

Linux/src/devices/emulator/mod.rs

@@ -1,11 +1,13 @@
 use emulatorwindow::EmulatorWindow;
-use relm4::{component::Connector, ComponentController};
+use relm4::component::Connector;
 use relm4::Component;
 use relm4::gtk::prelude::*;
+use relm4::ComponentController;
 
 use crate::registry::Registry;
 use crate::util::unique_id::UniqueId;
-use super::{Device, DeviceRegistryItem};
+use super::Device;
+use super::DeviceRegistryItem;
 
 
 pub mod emulatorwindow;
@@ -13,7 +15,7 @@ pub mod emulatorwindow;
 
 pub struct EmulatorWindowDevice
 {
-    window: Option<Connector<EmulatorWindow>>
+    window: Connector<EmulatorWindow>
 }
 
 
@@ -21,9 +23,12 @@ impl EmulatorWindowDevice
 {
     fn new() -> Self
     {
+        let builder = EmulatorWindow::builder();
+        let window = builder.launch({});
+
         EmulatorWindowDevice
         {
-            window: None
+            window
         }
     }
 }
@@ -31,20 +36,14 @@ impl EmulatorWindowDevice
 
 impl Device for EmulatorWindowDevice
 {
-    fn activate(&mut self)
+}
+
+
+impl Drop for EmulatorWindowDevice
+{
+    fn drop(&mut self)
     {
-        if self.window.is_some() { return }
+        self.window.widget().close();
-
-        let builder = EmulatorWindow::builder();
-        self.window = Some(builder.launch({}));
-    }
-
-
-    fn deactivate(&mut self)
-    {
-        let Some(window) = self.window.take() else { return };
-
-        window.widget().close();
     }
 }
 
@@ -52,7 +51,8 @@ impl Device for EmulatorWindowDevice
 pub fn register(registry: &mut Registry<DeviceRegistryItem>)
 {
     registry.register(DeviceRegistryItem {
-        unique_id: UniqueId::new("emulator"),
+        unique_id: UniqueId::from("emulator"),
-        factory: || Box::new(EmulatorWindowDevice::new())
+        factory: || Box::new(EmulatorWindowDevice::new()),
+        settings_widget_factory: || None
     });
 }

Linux/src/devices/mod.rs

@@ -4,20 +4,20 @@ pub mod serial_min;
 
 use crate::registry::Registry;
 use crate::registry::RegistryItem;
+use crate::ui::EmbeddedWidgetConnector;
 use crate::util::unique_id::UniqueId;
 
 
 pub struct DeviceRegistryItem
 {
     pub unique_id: UniqueId,
-    pub factory: fn() -> Box<dyn Device>
+    pub factory: fn() -> Box<dyn Device>,
+    pub settings_widget_factory: fn() -> Option<Box<dyn EmbeddedWidgetConnector>>
 }
 
 
 pub trait Device
 {
-    fn activate(&mut self);
-    fn deactivate(&mut self);
 }
 
 

Linux/src/devices/serial_min/mod.rs

@@ -1,6 +1,14 @@
+use relm4::Component;
+use settingswidget::SerialMinSettingsInit;
+use settingswidget::SerialMinSettingsWidget;
+
 use crate::registry::Registry;
 use crate::util::unique_id::UniqueId;
-use super::{Device, DeviceRegistryItem};
+use super::Device;
+use super::DeviceRegistryItem;
+
+
+pub mod settingswidget;
 
 
 pub struct SerialMinDevice
@@ -11,23 +19,20 @@ pub struct SerialMinDevice
 
 impl Device for SerialMinDevice
 {
-    fn activate(&mut self)
-    {
-        //todo!()
-    }
-
-
-    fn deactivate(&mut self)
-    {
-        //todo!()
-    }
 }
 
 
 pub fn register(registry: &mut Registry<DeviceRegistryItem>)
 {
     registry.register(DeviceRegistryItem {
-        unique_id: UniqueId::new("serial_min"),
+        unique_id: UniqueId::from("serial_min"),
-        factory: || Box::new(SerialMinDevice {})
+        factory: || Box::new(SerialMinDevice {}),
+        settings_widget_factory: ||
+        {
+            let builder = SerialMinSettingsWidget::builder();
+            Some(Box::new(builder.launch(SerialMinSettingsInit
+            {
+            })))
+        }
     });
 }

Linux/src/devices/serial_min/settingswidget.rs

@@ -0,0 +1,183 @@
+use gtk::StringList;
+use gtk::glib::clone;
+use relm4::component::Connector;
+use relm4::prelude::*;
+use relm4::gtk::prelude::*;
+use serialport::SerialPortInfo;
+
+use crate::ui::EmbeddedWidgetConnector;
+
+
+#[tracker::track]
+pub struct SerialMinSettingsWidget
+{
+    #[do_not_track]
+    ports: Vec<String>,
+
+    custom_port: String,
+    custom_port_visible: bool
+}
+
+
+#[derive(Debug)]
+pub enum SerialMinSettingsWidgetMessage
+{
+    PortChanged(usize),
+    CustomPortChanged(String)
+}
+
+
+pub struct SerialMinSettingsInit
+{
+    // this needs a good design - we need to be able to modify the device instance, but
+    // we can't pass the reference or an Rc to the device due to the design of create_settings_widget.
+    // Either seperate the UI from the Device, or pass a middle man (sender/receiver style perhaps?)
+}
+
+
+pub struct SerialMinSettingsWidgets
+{
+    custom_port_input: gtk::Entry
+}
+
+
+impl SimpleComponent for SerialMinSettingsWidget
+{
+    type Init = SerialMinSettingsInit;
+    type Input = SerialMinSettingsWidgetMessage;
+    type Output = ();
+    type Root = gtk::Box;
+    type Widgets = SerialMinSettingsWidgets;
+
+
+    fn init_root() -> Self::Root
+    {
+        gtk::Box::builder()
+            .hexpand(true)
+            .orientation(gtk::Orientation::Vertical)
+            .spacing(8)
+            .build()
+    }
+
+
+    fn init(_data: Self::Init, root: Self::Root, sender: ComponentSender<Self>, ) -> ComponentParts<Self>
+    {
+        let port_label = gtk::Label::builder()
+            .label(t!("serial_min.settings.port.label"))
+            .halign(gtk::Align::Start)
+            .build();
+
+        root.append(&port_label);
+
+
+        let ports_list = serialport::available_ports().unwrap_or(Vec::<SerialPortInfo>::new());
+        let ports: Vec<String> = ports_list.iter().map(|p| p.port_name.clone()).collect();
+
+        let port_model_vec: Vec<&str> = ports.iter().map(|p| p.as_str()).collect();
+        let port_model = StringList::new(&port_model_vec);
+
+        port_model.append(t!("serial_min.settings.port.custom").as_ref());
+
+        let port_select = gtk::DropDown::builder()
+            .model(&port_model)
+            .selected(ports.len().try_into().unwrap_or(gtk::ffi::GTK_INVALID_LIST_POSITION))
+            .build();
+
+        root.append(&port_select);
+
+
+        let port_select_cloned = port_select.clone();
+        port_select.connect_selected_notify(clone!(
+            @strong sender => move |_|
+            {
+                let active_index = port_select_cloned.selected();
+                if active_index == gtk::ffi::GTK_INVALID_LIST_POSITION { return };
+
+                if let Ok(active_index_usize) = usize::try_from(active_index)
+                {
+                    sender.input(SerialMinSettingsWidgetMessage::PortChanged(active_index_usize));
+                }
+            }));
+
+
+        let custom_port_input = gtk::Entry::builder()
+            .hexpand(true)
+            .placeholder_text(t!("serial_min.settings.custom_port_placeholder"))
+            .build();
+
+        root.append(&custom_port_input);
+
+
+        let custom_port_input_cloned = custom_port_input.clone();
+        custom_port_input.connect_changed(clone!(
+            @strong sender => move |_|
+            {
+                sender.input(SerialMinSettingsWidgetMessage::CustomPortChanged(String::from(custom_port_input_cloned.text().as_str())));
+            }
+        ));
+
+
+        let model = SerialMinSettingsWidget
+        {
+            ports,
+
+            custom_port: String::new(),
+            custom_port_visible: true,
+
+            tracker: 0
+        };
+
+
+        // TODO load settings
+
+
+        let widgets = SerialMinSettingsWidgets
+        {
+            custom_port_input
+        };
+
+        ComponentParts { model, widgets }
+    }
+
+
+    fn update(&mut self, msg: Self::Input, _sender: ComponentSender<Self>)
+    {
+        match msg
+        {
+            SerialMinSettingsWidgetMessage::PortChanged(index) =>
+            {
+                self.set_custom_port_visible(index >= self.ports.len());
+            },
+
+            SerialMinSettingsWidgetMessage::CustomPortChanged(value) =>
+            {
+                self.set_custom_port(value);
+            }
+        }
+    }
+
+
+    fn update_view(&self, widgets: &mut Self::Widgets, _sender: ComponentSender<Self>)
+    {
+        if self.changed_custom_port_visible()
+        {
+            log::info!("Visible: {}", self.custom_port_visible);
+            widgets.custom_port_input.set_visible(self.custom_port_visible);
+        }
+
+        if self.changed_custom_port()
+        {
+            // should this sync two-way or not?
+            //widgets
+        }
+    }
+}
+
+
+impl EmbeddedWidgetConnector for Connector<SerialMinSettingsWidget>
+{
+    fn root(&self) -> &relm4::gtk::Widget
+    {
+        self.widget().as_ref()
+    }
+}

Linux/src/main.rs

@@ -1,8 +1,4 @@
-use std::cell::RefCell;
-use std::rc::Rc;
 use env_logger::Env;
-use mainwindow::MainWindowInit;
-use orchestrator::Orchestrator;
 use relm4::prelude::*;
 
 #[macro_use]
@@ -12,6 +8,7 @@ i18n!("locales");
 
 
 pub mod util;
+pub mod ui;
 pub mod registry;
 pub mod devices;
 pub mod actions;
@@ -28,13 +25,6 @@ fn main()
 
     relm4_icons::initialize_icons();
 
-    let orchestrator = Rc::new(RefCell::new(Orchestrator::new()));
-
     let app = RelmApp::new("com.github.mvrens.massiveknob");
-    app.run::<mainwindow::MainWindow>(MainWindowInit
+    app.run::<mainwindow::MainWindow>(());
-    {
-        orchestrator: Rc::clone(&orchestrator)
-    });
-
-    orchestrator.borrow_mut().finalize();
 }

Linux/src/mainwindow.rs

@@ -1,59 +1,49 @@
-use std::cell::RefCell;
-use std::rc::Rc;
 use gtk::glib::clone;
 use gtk::prelude::*;
 use relm4::prelude::*;
 
 use crate::orchestrator::Orchestrator;
 use crate::registry::RegistryItem;
+use crate::ui::EmbeddedWidgetConnector;
 use crate::util::unique_id::UniqueId;
 
+#[tracker::track]
 pub struct MainWindow
 {
-    orchestrator: Rc<RefCell<Orchestrator>>,
+    #[do_not_track]
-    devices_sorted: Vec<SortedDevice>
+    orchestrator: Orchestrator,
-}
 
+    #[do_not_track]
+    devices_sorted: Vec<SortedDevice>,
 
-pub struct MainWindowInit
+    #[no_eq]
-{
+    device_settings_widget: Option<Box<dyn EmbeddedWidgetConnector>>
-    pub orchestrator: Rc<RefCell<Orchestrator>>
-}
-
-
-impl std::fmt::Debug for MainWindowInit
-{
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result
-    {
-        f.debug_struct("MainWindowInit")
-            // Skip orchestrator
-            .finish()
-    }
 }
 
 
 #[derive(Debug)]
 pub enum MainWindowMsg
 {
+    DeviceInitial(usize),
     DeviceChanged(usize)
 }
 
 
 pub struct MainWindowWidgets
 {
-    _device: MainWindowDeviceWidgets
+    device: MainWindowDeviceWidgets
 }
 
 
 pub struct MainWindowDeviceWidgets
 {
-    _devices_combobox: gtk::ComboBoxText
+    settings_container: gtk::Box
 }
 
 
 impl SimpleComponent for MainWindow
 {
-    type Init = MainWindowInit;
+    type Init = ();
     type Input = MainWindowMsg;
     type Output = ();
     type Root = gtk::Window;
@@ -71,20 +61,14 @@ impl SimpleComponent for MainWindow
     }
 
 
-    fn init(data: Self::Init, window: Self::Root, sender: ComponentSender<Self>) -> ComponentParts<Self>
+    fn init(_data: Self::Init, window: Self::Root, sender: ComponentSender<Self>) -> ComponentParts<Self>
     {
-        {
+        let orchestrator = Orchestrator::new();
-            let mut init_orchestrator = data.orchestrator.borrow_mut();
-            init_orchestrator.initialize();
-        }
-
-
-        let orchestrator = data.orchestrator.borrow();
 
         let mut devices_sorted: Vec<SortedDevice> = orchestrator.devices()
             .map(|device| SortedDevice
             {
-                unique_id: device.unique_id(),
+                unique_id: device.unique_id.clone(),
                 name: device.name()
             })
             .collect();
@@ -94,8 +78,12 @@ impl SimpleComponent for MainWindow
 
         let model = MainWindow
         {
-            orchestrator: data.orchestrator.clone(),
+            orchestrator,
-            devices_sorted
+            devices_sorted,
+
+            device_settings_widget: None,
+
+            tracker: 0
         };
 
         let widgets = MainWindowBuilder::new(&window, &model, &sender).build();
@@ -108,18 +96,53 @@ impl SimpleComponent for MainWindow
     {
         match msg
         {
-            MainWindowMsg::DeviceChanged(index) =>
+            MainWindowMsg::DeviceInitial(index) => self.apply_device_settings_widget(index, true),
-            {
+            MainWindowMsg::DeviceChanged(index) => self.apply_device_settings_widget(index, false)
-                let mut orchestrator = self.orchestrator.borrow_mut();
+        }
-                let device = &self.devices_sorted[index];
+    }
 
-                orchestrator.set_current_device_id(device.unique_id.clone());
+
+    fn update_view(&self, widgets: &mut Self::Widgets, _sender: ComponentSender<Self>)
+    {
+        if self.changed(MainWindow::device_settings_widget())
+        {
+            let current_child = widgets.device.settings_container.last_child();
+            if let Some(current_child) = &current_child
+            {
+                widgets.device.settings_container.remove(current_child);
+            }
+
+            if let Some(new_child) = &self.device_settings_widget
+            {
+                widgets.device.settings_container.append(new_child.as_ref().root());
             }
         }
     }
 }
 
 
+impl MainWindow
+{
+    fn apply_device_settings_widget(&mut self, index: usize, initial: bool)
+    {
+        let mut widget = None;
+        {
+            if initial
+            {
+                self.orchestrator.with_active_device(|device_instance, cookie| { widget = device_instance.create_settings_widget(cookie) });
+            }
+            else
+            {
+                let device_id = self.devices_sorted[index].unique_id.clone();
+                self.orchestrator.set_active_device_id(&device_id, |device_instance, cookie| { widget = device_instance.create_settings_widget(cookie) });
+            }
+        }
+
+        self.set_device_settings_widget(widget)
+    }
+}
+
+
 struct MainWindowBuilder<'a>
 {
     window: &'a gtk::Window,
@@ -148,7 +171,7 @@ impl<'a> MainWindowBuilder<'a>
 
         MainWindowWidgets
         {
-            _device: self.init_device_tab(&tabs)
+            device: self.init_device_tab(&tabs)
             //Self::new_box_tab(&tabs, "mainwindow.tab.analoginputs");
             //Self::new_box_tab(&tabs, "mainwindow.tab.digitalinputs");
             //Self::add_box_tab(&tabs, "mainwindow.tab.analogoutputs");
@@ -171,11 +194,27 @@ impl<'a> MainWindowBuilder<'a>
 
 
 
-        let devices_combobox = gtk::ComboBoxText::builder()
+        let devices_combobox = gtk::ComboBoxText::builder().build();
-            .build();
+        tab.append(&devices_combobox);
+
+
+        let active_device_id = self.model.orchestrator.active_device_id();
+        for (index, device) in self.model.devices_sorted.iter().enumerate()
+        {
+            devices_combobox.append_text(device.name.as_str());
+
+            if let Some(device_id) = &active_device_id
+            {
+                if *device_id == device.unique_id
+                {
+                    devices_combobox.set_active(Some(index as u32));
+                    sender.input(MainWindowMsg::DeviceInitial(index));
+                }
+            }
+        }
+
 
         let devices_combobox_cloned = devices_combobox.clone();
-
         devices_combobox.connect_changed(clone!(
             @strong sender => move |_|
             {
@@ -188,29 +227,14 @@ impl<'a> MainWindowBuilder<'a>
                 }
             }));
 
-        tab.append(&devices_combobox);
 
-
+        let settings_container = gtk::Box::builder().build();
-        let current_device_id = self.model.orchestrator.borrow().current_device_id();
+        tab.append(&settings_container);
-
-
-        for (index, device) in self.model.devices_sorted.iter().enumerate()
-        {
-            devices_combobox.append_text(device.name.as_str());
-
-            if let Some(device_id) = current_device_id.clone()
-            {
-                if device_id == device.unique_id
-                {
-                    devices_combobox.set_active(Some(index as u32));
-                }
-            }
-        }
 
 
         MainWindowDeviceWidgets
         {
-            _devices_combobox: devices_combobox
+            settings_container
         }
     }
 
@@ -237,6 +261,7 @@ impl<'a> MainWindowBuilder<'a>
 }
 
 
+#[derive(Clone)]
 struct SortedDevice
 {
     unique_id: UniqueId,

Linux/src/orchestrator/mod.rs

@@ -1,5 +1,8 @@
+use std::borrow::{Borrow, BorrowMut};
+use std::sync::Arc;
+
 use crate::actions;
-use crate::actions::ActionRegistryItem;
+//use crate::actions::ActionRegistryItem;
 use crate::config::json::JsonConfigManager;
 use crate::config::{ConfigManager, ConfigName};
 use crate::devices::{self, Device};
@@ -14,15 +17,13 @@ mod settings;
 pub struct Orchestrator
 {
     config_manager: ConfigManager,
+    settings_name: ConfigName,
 
     device_registry: Registry<DeviceRegistryItem>,
-    action_registry: Registry<ActionRegistryItem>,
+    //action_registry: Registry<ActionRegistryItem>,
 
-    settings_name: ConfigName,
+//    current_device_instance: Option<Box<dyn Device>>
-    settings: settings::Settings,
+    active_device: Option<ActiveDevice>
-
-
-    current_device_instance: Option<Box<dyn Device>>
 }
 
 
@@ -31,117 +32,151 @@ impl Orchestrator
     pub fn new() -> Self
     {
         let config_manager = ConfigManager::new();
-
         let settings_name = ConfigName::new("settings");
         let settings = match config_manager.read_json(&settings_name).expect("Error reading settings")
         {
-            None => settings::Settings::new(),
+            None => settings::Settings::default(),
             Some(v) => v
         };
 
+
         let mut device_registry = Registry::new();
         let mut action_registry = Registry::new();
 
         devices::register(&mut device_registry);
         actions::register(&mut action_registry);
 
-        Self
+        let mut instance = Self
         {
             config_manager,
+            settings_name,
 
             device_registry,
-            action_registry,
+            //action_registry,
 
-            settings_name,
+            //settings,
-            settings,
 
 
-            current_device_instance: None
+            active_device: None
+        };
+
+
+        instance.initialize(settings);
+        instance
+    }
+
+
+    fn initialize(&mut self, settings: settings::Settings)
+    {
+        if let Some(device_id) = settings.device_id
+        {
+            self.set_active_device(Some(UniqueId::from(device_id)));
         }
     }
 
 
-    pub fn initialize(&mut self)
-    {
-        self.set_current_device(self.current_device_id());
-    }
-
-
-    pub fn finalize(&mut self)
-    {
-        self.set_current_device(None);
-    }
-
-
     pub fn devices(&self) -> impl Iterator<Item = &DeviceRegistryItem>
     {
         self.device_registry.iter()
     }
 
 
-    pub fn current_device_id(&self) -> Option<UniqueId>
+    pub fn active_device_id(&self) -> Option<UniqueId>
     {
-        let Some(device_id) = &self.settings.device_id else { return None };
+        let Some(active_device) = &self.active_device else { return None };
-        Some(UniqueId::new(device_id.as_str()))
+        Some(active_device.id.clone())
     }
 
+    /*
+
 
     pub fn current_device(&self) -> Option<&DeviceRegistryItem>
     {
         let Some(device_id) = self.current_device_id() else { return None };
         self.device_registry.by_id(device_id)
     }
+    */
 
 
-    pub fn set_current_device_id(&mut self, id: UniqueId)
+    pub fn with_active_device<F>(&self, callback: F) where F: FnOnce(&dyn Device)
     {
-        let new_id = Some(String::from(id.as_str()));
+        let Some(active_device) = self.active_device else { return };
-        if new_id == self.settings.device_id { return; }
+        let instance = active_device.instance.clone();
 
-        self.settings.device_id = new_id;
+        callback(instance.as_ref().as_ref());
+
+        self.active_device.as_ref().map(|device| callback(&*device.instance.clone()));
+    }
+
+
+
+    pub fn set_active_device_id<F>(&mut self, id: &UniqueId, on_changed: F) where F: FnOnce(&dyn Device)
+    {
+        let id = Some(id.clone());
+        if id == self.active_device_id() { return }
+
+        self.set_active_device(id);
         self.store_settings();
 
-        self.set_current_device(Some(id));
+        self.with_active_device(on_changed);
     }
 
 
+
     fn store_settings(&self)
     {
-        if let Err(e) = self.config_manager.write_json(&self.settings_name, &self.settings)
+        let settings = settings::Settings
+        {
+            device_id: match &self.active_device
+            {
+                None => None,
+                Some(v) => Some(v.id.clone().into())
+            }
+        };
+
+        if let Err(e) = self.config_manager.write_json(&self.settings_name, &settings)
         {
             log::error!("Error writing settings: {e}");
         }
     }
 
 
-    fn set_current_device(&mut self, id: Option<UniqueId>)
+
+    fn set_active_device(&mut self, id: Option<UniqueId>)
     {
-        let prev_device_instance;
+        self.active_device = match id
-        let new_device = match id
         {
             None => None,
-            Some(v) => self.device_registry.by_id(v)
+            Some(v) =>
+                match self.device_registry.by_id(&v)
+                {
+                    None => None,
+                    Some(d) =>
+                    {
+                        Some(ActiveDevice
+                        {
+                            id: v.clone(),
+                            instance: Arc::new((d.factory)())
+                        })
+                    }
+                }
         };
-
-
-        // Replace the device instance
-        if let Some(new_device) = new_device
-        {
-            let mut new_device_instance = (new_device.factory)();
-            new_device_instance.activate();
-
-            prev_device_instance = self.current_device_instance.replace(new_device_instance);
-        }
-        else
-        {
-            prev_device_instance = self.current_device_instance.take();
-        }
-
-
-        // Deactivate the previous instance
-        if let Some(mut prev_device_instance) = prev_device_instance
-        {
-            prev_device_instance.deactivate();
-        }
     }
 }
+
+
+impl Drop for Orchestrator
+{
+    fn drop(&mut self)
+    {
+        self.set_active_device(None);
+    }
+}
+
+
+
+struct ActiveDevice
+{
+    id: UniqueId,
+    instance: Arc<Box<dyn Device>>
+}

Linux/src/orchestrator/settings.rs

@@ -7,9 +7,9 @@ pub struct Settings
 }
 
 
-impl Settings
+impl Default for Settings
 {
-    pub fn new() -> Self
+    fn default() -> Self
     {
         Self
         {

Linux/src/registry/mod.rs

@@ -49,7 +49,7 @@ impl<T> Registry<T> where T: RegistryItem
     }
 
 
-    pub fn by_id(&self, id: UniqueId) -> Option<&T>
+    pub fn by_id(&self, id: &UniqueId) -> Option<&T>
     {
         self.items.get(id.as_str())
     }

Linux/src/ui/mod.rs

@@ -0,0 +1,4 @@
+pub trait EmbeddedWidgetConnector
+{
+    fn root(&self) -> &relm4::gtk::Widget;
+}

Linux/src/util/validated_string.rs

@@ -50,6 +50,33 @@ impl<T: ValidatedStringPattern> Clone for ValidatedString<T>
 }
 
 
+impl<T: ValidatedStringPattern> From<&str> for ValidatedString<T>
+{
+    fn from(value: &str) -> Self
+    {
+        Self::new(value)
+    }
+}
+
+
+impl<T: ValidatedStringPattern> From<String> for ValidatedString<T>
+{
+    fn from(value: String) -> Self
+    {
+        Self::new(value.as_str())
+    }
+}
+
+
+impl<T: ValidatedStringPattern> Into<String> for ValidatedString<T>
+{
+    fn into(self) -> String
+    {
+        self.inner.clone()
+    }
+}
+
+
 pub trait ValidatedStringPattern
 {
     fn pattern() -> &'static str;