Add theme and theme_changes functions to system

runtime/src/lib.rs

@@ -25,7 +25,6 @@ pub use iced_futures as futures;
 pub use task::Task;
 pub use user_interface::UserInterface;
 
-use crate::core::theme;
 use crate::core::widget;
 use crate::futures::futures::channel::oneshot;
 
@@ -57,9 +56,6 @@ pub enum Action<T> {
     /// Run a system action.
     System(system::Action),
 
-    /// Change the default system theme mode of all windows.
-    ChangeTheme(theme::Mode),
-
     /// Recreate all user interfaces and redraw all windows.
     Reload,
 
@@ -86,7 +82,6 @@ impl<T> Action<T> {
             Action::Clipboard(action) => Err(Action::Clipboard(action)),
             Action::Window(action) => Err(Action::Window(action)),
             Action::System(action) => Err(Action::System(action)),
-            Action::ChangeTheme(mode) => Err(Action::ChangeTheme(mode)),
             Action::Reload => Err(Action::Reload),
             Action::Exit => Err(Action::Exit),
         }
@@ -111,9 +106,6 @@ where
             }
             Action::Window(_) => write!(f, "Action::Window"),
             Action::System(action) => write!(f, "Action::System({action:?})"),
-            Action::ChangeTheme(mode) => {
-                write!(f, "Action::ChangeTheme({mode:?})")
-            }
             Action::Reload => write!(f, "Action::Reload"),
             Action::Exit => write!(f, "Action::Exit"),
         }

runtime/src/system.rs

@@ -1,11 +1,20 @@
 //! Access the native system.
+use crate::core::theme;
 use crate::futures::futures::channel::oneshot;
+use crate::futures::subscription::{self, Subscription};
+use crate::task::{self, Task};
 
 /// An operation to be performed on the system.
 #[derive(Debug)]
 pub enum Action {
-    /// Query system information and produce `T` with the result.
-    QueryInformation(oneshot::Sender<Information>),
+    /// Send available system information.
+    GetInformation(oneshot::Sender<Information>),
+
+    /// Send the current system theme mode.
+    GetTheme(oneshot::Sender<theme::Mode>),
+
+    /// Notify to the runtime that the system theme has changed.
+    NotifyTheme(theme::Mode),
 }
 
 /// Contains information about the system (e.g. system name, processor, memory, graphics adapter).
@@ -37,3 +46,29 @@ pub struct Information {
     /// Model information for the active graphics adapter
     pub graphics_adapter: String,
 }
+
+/// Returns available system information.
+pub fn information() -> Task<Information> {
+    task::oneshot(|channel| {
+        crate::Action::System(Action::GetInformation(channel))
+    })
+}
+
+/// Returns the current system theme.
+pub fn theme() -> Task<theme::Mode> {
+    task::oneshot(|sender| crate::Action::System(Action::GetTheme(sender)))
+}
+
+/// Subscribes to system theme changes.
+pub fn theme_changes() -> Subscription<theme::Mode> {
+    #[derive(Hash)]
+    struct ThemeChanges;
+
+    subscription::filter_map(ThemeChanges, |event| {
+        let subscription::Event::SystemThemeChanged(mode) = event else {
+            return None;
+        };
+
+        Some(mode)
+    })
+}

runtime/src/window.rs

@@ -266,12 +266,12 @@ pub fn close<T>(id: Id) -> Task<T> {
 }
 
 /// Gets the window [`Id`] of the oldest window.
-pub fn get_oldest() -> Task<Option<Id>> {
+pub fn oldest() -> Task<Option<Id>> {
     task::oneshot(|channel| crate::Action::Window(Action::GetOldest(channel)))
 }
 
 /// Gets the window [`Id`] of the latest window.
-pub fn get_latest() -> Task<Option<Id>> {
+pub fn latest() -> Task<Option<Id>> {
     task::oneshot(|channel| crate::Action::Window(Action::GetLatest(channel)))
 }
 
@@ -315,14 +315,14 @@ pub fn set_resize_increments<T>(id: Id, increments: Option<Size>) -> Task<T> {
 }
 
 /// Get the window's size in logical dimensions.
-pub fn get_size(id: Id) -> Task<Size> {
+pub fn size(id: Id) -> Task<Size> {
     task::oneshot(move |channel| {
         crate::Action::Window(Action::GetSize(id, channel))
     })
 }
 
 /// Gets the maximized state of the window with the given [`Id`].
-pub fn get_maximized(id: Id) -> Task<bool> {
+pub fn is_maximized(id: Id) -> Task<bool> {
     task::oneshot(move |channel| {
         crate::Action::Window(Action::GetMaximized(id, channel))
     })
@@ -334,7 +334,7 @@ pub fn maximize<T>(id: Id, maximized: bool) -> Task<T> {
 }
 
 /// Gets the minimized state of the window with the given [`Id`].
-pub fn get_minimized(id: Id) -> Task<Option<bool>> {
+pub fn is_minimized(id: Id) -> Task<Option<bool>> {
     task::oneshot(move |channel| {
         crate::Action::Window(Action::GetMinimized(id, channel))
     })
@@ -346,14 +346,14 @@ pub fn minimize<T>(id: Id, minimized: bool) -> Task<T> {
 }
 
 /// Gets the position in logical coordinates of the window with the given [`Id`].
-pub fn get_position(id: Id) -> Task<Option<Point>> {
+pub fn position(id: Id) -> Task<Option<Point>> {
     task::oneshot(move |channel| {
         crate::Action::Window(Action::GetPosition(id, channel))
     })
 }
 
 /// Gets the scale factor of the window with the given [`Id`].
-pub fn get_scale_factor(id: Id) -> Task<f32> {
+pub fn scale_factor(id: Id) -> Task<f32> {
     task::oneshot(move |channel| {
         crate::Action::Window(Action::GetScaleFactor(id, channel))
     })
@@ -365,7 +365,7 @@ pub fn move_to<T>(id: Id, position: Point) -> Task<T> {
 }
 
 /// Gets the current [`Mode`] of the window.
-pub fn get_mode(id: Id) -> Task<Mode> {
+pub fn mode(id: Id) -> Task<Mode> {
     task::oneshot(move |channel| {
         crate::Action::Window(Action::GetMode(id, channel))
     })
@@ -426,7 +426,7 @@ pub fn show_system_menu<T>(id: Id) -> Task<T> {
 
 /// Gets an identifier unique to the window, provided by the underlying windowing system. This is
 /// not to be confused with [`Id`].
-pub fn get_raw_id<Message>(id: Id) -> Task<u64> {
+pub fn raw_id<Message>(id: Id) -> Task<u64> {
     task::oneshot(|channel| {
         crate::Action::Window(Action::GetRawId(id, channel))
     })