Introduce `daemon` API and unify shell runtimes

36 files changed, 81 insertions, 72 deletions

diff --git a/examples/arc/src/main.rs b/examples/arc/src/main.rs
index 4576404f..b1e8402a 100644
--- a/examples/arc/src/main.rs
+++ b/examples/arc/src/main.rs
@@ -7,7 +7,7 @@ use iced::widget::canvas::{
 use iced::{Element, Length, Point, Rectangle, Renderer, Subscription, Theme};
 
 pub fn main() -> iced::Result {
-    iced::program("Arc - Iced", Arc::update, Arc::view)
+    iced::application("Arc - Iced", Arc::update, Arc::view)
         .subscription(Arc::subscription)
         .theme(|_| Theme::Dark)
         .antialiasing(true)
diff --git a/examples/bezier_tool/src/main.rs b/examples/bezier_tool/src/main.rs
index 29df3eeb..eaf84b97 100644
--- a/examples/bezier_tool/src/main.rs
+++ b/examples/bezier_tool/src/main.rs
@@ -4,7 +4,7 @@ use iced::widget::{button, container, horizontal_space, hover};
 use iced::{Element, Length, Theme};
 
 pub fn main() -> iced::Result {
-    iced::program("Bezier Tool - Iced", Example::update, Example::view)
+    iced::application("Bezier Tool - Iced", Example::update, Example::view)
         .theme(|_| Theme::CatppuccinMocha)
         .antialiasing(true)
         .run()
diff --git a/examples/checkbox/src/main.rs b/examples/checkbox/src/main.rs
index bec4a954..f06557f8 100644
--- a/examples/checkbox/src/main.rs
+++ b/examples/checkbox/src/main.rs
@@ -4,7 +4,7 @@ use iced::{Element, Font};
 const ICON_FONT: Font = Font::with_name("icons");
 
 pub fn main() -> iced::Result {
-    iced::program("Checkbox - Iced", Example::update, Example::view)
+    iced::application("Checkbox - Iced", Example::update, Example::view)
         .font(include_bytes!("../fonts/icons.ttf").as_slice())
         .run()
 }
diff --git a/examples/clock/src/main.rs b/examples/clock/src/main.rs
index 7c4685c4..4584a0c7 100644
--- a/examples/clock/src/main.rs
+++ b/examples/clock/src/main.rs
@@ -11,7 +11,7 @@ use iced::{
 pub fn main() -> iced::Result {
     tracing_subscriber::fmt::init();
 
-    iced::program("Clock - Iced", Clock::update, Clock::view)
+    iced::application("Clock - Iced", Clock::update, Clock::view)
         .subscription(Clock::subscription)
         .theme(Clock::theme)
         .antialiasing(true)
diff --git a/examples/color_palette/src/main.rs b/examples/color_palette/src/main.rs
index d9325edb..e4b19731 100644
--- a/examples/color_palette/src/main.rs
+++ b/examples/color_palette/src/main.rs
@@ -11,7 +11,7 @@ use std::marker::PhantomData;
 use std::ops::RangeInclusive;
 
 pub fn main() -> iced::Result {
-    iced::program(
+    iced::application(
         "Color Palette - Iced",
         ColorPalette::update,
         ColorPalette::view,
diff --git a/examples/custom_shader/src/main.rs b/examples/custom_shader/src/main.rs
index 463b2df9..b04a8183 100644
--- a/examples/custom_shader/src/main.rs
+++ b/examples/custom_shader/src/main.rs
@@ -9,9 +9,13 @@ use iced::window;
 use iced::{Alignment, Color, Element, Length, Subscription};
 
 fn main() -> iced::Result {
-    iced::program("Custom Shader - Iced", IcedCubes::update, IcedCubes::view)
-        .subscription(IcedCubes::subscription)
-        .run()
+    iced::application(
+        "Custom Shader - Iced",
+        IcedCubes::update,
+        IcedCubes::view,
+    )
+    .subscription(IcedCubes::subscription)
+    .run()
 }
 
 struct IcedCubes {
diff --git a/examples/download_progress/src/main.rs b/examples/download_progress/src/main.rs
index 7974d5a0..d91e5eab 100644
--- a/examples/download_progress/src/main.rs
+++ b/examples/download_progress/src/main.rs
@@ -4,9 +4,13 @@ use iced::widget::{button, center, column, progress_bar, text, Column};
 use iced::{Alignment, Element, Subscription};
 
 pub fn main() -> iced::Result {
-    iced::program("Download Progress - Iced", Example::update, Example::view)
-        .subscription(Example::subscription)
-        .run()
+    iced::application(
+        "Download Progress - Iced",
+        Example::update,
+        Example::view,
+    )
+    .subscription(Example::subscription)
+    .run()
 }
 
 #[derive(Debug)]
diff --git a/examples/editor/src/main.rs b/examples/editor/src/main.rs
index ec65e2fa..bed9d94a 100644
--- a/examples/editor/src/main.rs
+++ b/examples/editor/src/main.rs
@@ -12,7 +12,7 @@ use std::path::{Path, PathBuf};
 use std::sync::Arc;
 
 pub fn main() -> iced::Result {
-    iced::program("Editor - Iced", Editor::update, Editor::view)
+    iced::application("Editor - Iced", Editor::update, Editor::view)
         .load(Editor::load)
         .subscription(Editor::subscription)
         .theme(Editor::theme)
diff --git a/examples/events/src/main.rs b/examples/events/src/main.rs
index 504ed5d8..4f0f07b0 100644
--- a/examples/events/src/main.rs
+++ b/examples/events/src/main.rs
@@ -5,7 +5,7 @@ use iced::window;
 use iced::{Alignment, Element, Length, Subscription, Task};
 
 pub fn main() -> iced::Result {
-    iced::program("Events - Iced", Events::update, Events::view)
+    iced::application("Events - Iced", Events::update, Events::view)
         .subscription(Events::subscription)
         .exit_on_close_request(false)
         .run()
diff --git a/examples/exit/src/main.rs b/examples/exit/src/main.rs
index 8ba180a5..b998016e 100644
--- a/examples/exit/src/main.rs
+++ b/examples/exit/src/main.rs
@@ -3,7 +3,7 @@ use iced::window;
 use iced::{Alignment, Element, Task};
 
 pub fn main() -> iced::Result {
-    iced::program("Exit - Iced", Exit::update, Exit::view).run()
+    iced::application("Exit - Iced", Exit::update, Exit::view).run()
 }
 
 #[derive(Default)]
diff --git a/examples/ferris/src/main.rs b/examples/ferris/src/main.rs
index 0400c376..88006898 100644
--- a/examples/ferris/src/main.rs
+++ b/examples/ferris/src/main.rs
@@ -9,7 +9,7 @@ use iced::{
 };
 
 pub fn main() -> iced::Result {
-    iced::program("Ferris - Iced", Image::update, Image::view)
+    iced::application("Ferris - Iced", Image::update, Image::view)
         .subscription(Image::subscription)
         .theme(|_| Theme::TokyoNight)
         .run()
diff --git a/examples/game_of_life/src/main.rs b/examples/game_of_life/src/main.rs
index 7e6d461d..421f862a 100644
--- a/examples/game_of_life/src/main.rs
+++ b/examples/game_of_life/src/main.rs
@@ -15,12 +15,16 @@ use std::time::Duration;
 pub fn main() -> iced::Result {
     tracing_subscriber::fmt::init();
 
-    iced::program("Game of Life - Iced", GameOfLife::update, GameOfLife::view)
-        .subscription(GameOfLife::subscription)
-        .theme(|_| Theme::Dark)
-        .antialiasing(true)
-        .centered()
-        .run()
+    iced::application(
+        "Game of Life - Iced",
+        GameOfLife::update,
+        GameOfLife::view,
+    )
+    .subscription(GameOfLife::subscription)
+    .theme(|_| Theme::Dark)
+    .antialiasing(true)
+    .centered()
+    .run()
 }
 
 struct GameOfLife {
diff --git a/examples/gradient/src/main.rs b/examples/gradient/src/main.rs
index 2b906c32..e5b19443 100644
--- a/examples/gradient/src/main.rs
+++ b/examples/gradient/src/main.rs
@@ -1,5 +1,5 @@
+use iced::application;
 use iced::gradient;
-use iced::program;
 use iced::widget::{
     checkbox, column, container, horizontal_space, row, slider, text,
 };
@@ -8,7 +8,7 @@ use iced::{Alignment, Color, Element, Length, Radians, Theme};
 pub fn main() -> iced::Result {
     tracing_subscriber::fmt::init();
 
-    iced::program("Gradient - Iced", Gradient::update, Gradient::view)
+    iced::application("Gradient - Iced", Gradient::update, Gradient::view)
         .style(Gradient::style)
         .transparent(true)
         .run()
@@ -95,11 +95,11 @@ impl Gradient {
         .into()
     }
 
-    fn style(&self, theme: &Theme) -> program::Appearance {
-        use program::DefaultStyle;
+    fn style(&self, theme: &Theme) -> application::Appearance {
+        use application::DefaultStyle;
 
         if self.transparent {
-            program::Appearance {
+            application::Appearance {
                 background_color: Color::TRANSPARENT,
                 text_color: theme.palette().text,
             }
diff --git a/examples/layout/src/main.rs b/examples/layout/src/main.rs
index c40ac820..2e774415 100644
--- a/examples/layout/src/main.rs
+++ b/examples/layout/src/main.rs
@@ -10,7 +10,7 @@ use iced::{
 };
 
 pub fn main() -> iced::Result {
-    iced::program(Layout::title, Layout::update, Layout::view)
+    iced::application(Layout::title, Layout::update, Layout::view)
         .subscription(Layout::subscription)
         .theme(Layout::theme)
         .run()
diff --git a/examples/loading_spinners/src/main.rs b/examples/loading_spinners/src/main.rs
index a63c51d4..503f2d7a 100644
--- a/examples/loading_spinners/src/main.rs
+++ b/examples/loading_spinners/src/main.rs
@@ -11,7 +11,7 @@ use circular::Circular;
 use linear::Linear;
 
 pub fn main() -> iced::Result {
-    iced::program(
+    iced::application(
         "Loading Spinners - Iced",
         LoadingSpinners::update,
         LoadingSpinners::view,
diff --git a/examples/modal/src/main.rs b/examples/modal/src/main.rs
index d185cf3b..413485e7 100644
--- a/examples/modal/src/main.rs
+++ b/examples/modal/src/main.rs
@@ -10,7 +10,7 @@ use iced::{Alignment, Color, Element, Length, Subscription, Task};
 use std::fmt;
 
 pub fn main() -> iced::Result {
-    iced::program("Modal - Iced", App::update, App::view)
+    iced::application("Modal - Iced", App::update, App::view)
         .subscription(App::subscription)
         .run()
 }
diff --git a/examples/multi_window/src/main.rs b/examples/multi_window/src/main.rs
index b82ad1f3..dfb816cf 100644
--- a/examples/multi_window/src/main.rs
+++ b/examples/multi_window/src/main.rs
@@ -1,18 +1,21 @@
-use iced::executor;
-use iced::multi_window::{self, Application};
 use iced::widget::{
     button, center, column, container, horizontal_space, scrollable, text,
     text_input,
 };
 use iced::window;
-use iced::{
-    Alignment, Element, Length, Settings, Subscription, Task, Theme, Vector,
-};
+use iced::{Alignment, Element, Length, Subscription, Task, Theme, Vector};
 
 use std::collections::BTreeMap;
 
 fn main() -> iced::Result {
-    Example::run(Settings::default())
+    iced::daemon(Example::title, Example::update, Example::view)
+        .load(|| {
+            window::open(window::Settings::default()).map(Message::WindowOpened)
+        })
+        .subscription(Example::subscription)
+        .theme(Example::theme)
+        .scale_factor(Example::scale_factor)
+        .run()
 }
 
 #[derive(Default)]
@@ -39,21 +42,7 @@ enum Message {
     TitleChanged(window::Id, String),
 }
 
-impl multi_window::Application for Example {
-    type Executor = executor::Default;
-    type Message = Message;
-    type Theme = Theme;
-    type Flags = ();
-
-    fn new(_flags: ()) -> (Self, Task<Message>) {
-        (
-            Example {
-                windows: BTreeMap::from([(window::Id::MAIN, Window::new(1))]),
-            },
-            Task::none(),
-        )
-    }
-
+impl Example {
     fn title(&self, window: window::Id) -> String {
         self.windows
             .get(&window)
@@ -97,7 +86,11 @@ impl multi_window::Application for Example {
             Message::WindowClosed(id) => {
                 self.windows.remove(&id);
 
-                Task::none()
+                if self.windows.is_empty() {
+                    iced::exit()
+                } else {
+                    Task::none()
+                }
             }
             Message::ScaleInputChanged(id, scale) => {
                 if let Some(window) = self.windows.get_mut(&id) {
@@ -149,7 +142,7 @@ impl multi_window::Application for Example {
             .unwrap_or(1.0)
     }
 
-    fn subscription(&self) -> Subscription<Self::Message> {
+    fn subscription(&self) -> Subscription<Message> {
         window::close_events().map(Message::WindowClosed)
     }
 }
diff --git a/examples/multitouch/src/main.rs b/examples/multitouch/src/main.rs
index 2453c7f5..69717310 100644
--- a/examples/multitouch/src/main.rs
+++ b/examples/multitouch/src/main.rs
@@ -13,7 +13,7 @@ use std::collections::HashMap;
 pub fn main() -> iced::Result {
     tracing_subscriber::fmt::init();
 
-    iced::program("Multitouch - Iced", Multitouch::update, Multitouch::view)
+    iced::application("Multitouch - Iced", Multitouch::update, Multitouch::view)
         .antialiasing(true)
         .centered()
         .run()
diff --git a/examples/pane_grid/src/main.rs b/examples/pane_grid/src/main.rs
index 6b5bd332..db9f7a05 100644
--- a/examples/pane_grid/src/main.rs
+++ b/examples/pane_grid/src/main.rs
@@ -7,7 +7,7 @@ use iced::widget::{
 use iced::{Color, Element, Length, Size, Subscription};
 
 pub fn main() -> iced::Result {
-    iced::program("Pane Grid - Iced", Example::update, Example::view)
+    iced::application("Pane Grid - Iced", Example::update, Example::view)
         .subscription(Example::subscription)
         .run()
 }
diff --git a/examples/pokedex/src/main.rs b/examples/pokedex/src/main.rs
index e62ed70b..b22ffe7f 100644
--- a/examples/pokedex/src/main.rs
+++ b/examples/pokedex/src/main.rs
@@ -3,7 +3,7 @@ use iced::widget::{self, center, column, image, row, text};
 use iced::{Alignment, Element, Length, Task};
 
 pub fn main() -> iced::Result {
-    iced::program(Pokedex::title, Pokedex::update, Pokedex::view)
+    iced::application(Pokedex::title, Pokedex::update, Pokedex::view)
         .load(Pokedex::search)
         .run()
 }
diff --git a/examples/qr_code/src/main.rs b/examples/qr_code/src/main.rs
index c6a90458..b30ecf15 100644
--- a/examples/qr_code/src/main.rs
+++ b/examples/qr_code/src/main.rs
@@ -2,7 +2,7 @@ use iced::widget::{center, column, pick_list, qr_code, row, text, text_input};
 use iced::{Alignment, Element, Theme};
 
 pub fn main() -> iced::Result {
-    iced::program(
+    iced::application(
         "QR Code Generator - Iced",
         QRGenerator::update,
         QRGenerator::view,
diff --git a/examples/screenshot/src/main.rs b/examples/screenshot/src/main.rs
index 78d3e9ff..1ea53e8f 100644
--- a/examples/screenshot/src/main.rs
+++ b/examples/screenshot/src/main.rs
@@ -13,7 +13,7 @@ use ::image::ColorType;
 fn main() -> iced::Result {
     tracing_subscriber::fmt::init();
 
-    iced::program("Screenshot - Iced", Example::update, Example::view)
+    iced::application("Screenshot - Iced", Example::update, Example::view)
         .subscription(Example::subscription)
         .run()
 }
diff --git a/examples/scrollable/src/main.rs b/examples/scrollable/src/main.rs
index a0dcf82c..f2a853e1 100644
--- a/examples/scrollable/src/main.rs
+++ b/examples/scrollable/src/main.rs
@@ -10,7 +10,7 @@ use once_cell::sync::Lazy;
 static SCROLLABLE_ID: Lazy<scrollable::Id> = Lazy::new(scrollable::Id::unique);
 
 pub fn main() -> iced::Result {
-    iced::program(
+    iced::application(
         "Scrollable - Iced",
         ScrollableDemo::update,
         ScrollableDemo::view,
diff --git a/examples/sierpinski_triangle/src/main.rs b/examples/sierpinski_triangle/src/main.rs
index 7dd7be5e..4c751937 100644
--- a/examples/sierpinski_triangle/src/main.rs
+++ b/examples/sierpinski_triangle/src/main.rs
@@ -8,7 +8,7 @@ use rand::Rng;
 use std::fmt::Debug;
 
 fn main() -> iced::Result {
-    iced::program(
+    iced::application(
         "Sierpinski Triangle - Iced",
         SierpinskiEmulator::update,
         SierpinskiEmulator::view,
diff --git a/examples/solar_system/src/main.rs b/examples/solar_system/src/main.rs
index deb211d8..2a67e23e 100644
--- a/examples/solar_system/src/main.rs
+++ b/examples/solar_system/src/main.rs
@@ -22,7 +22,7 @@ use std::time::Instant;
 pub fn main() -> iced::Result {
     tracing_subscriber::fmt::init();
 
-    iced::program(
+    iced::application(
         "Solar System - Iced",
         SolarSystem::update,
         SolarSystem::view,
diff --git a/examples/stopwatch/src/main.rs b/examples/stopwatch/src/main.rs
index a8149753..bd56785a 100644
--- a/examples/stopwatch/src/main.rs
+++ b/examples/stopwatch/src/main.rs
@@ -7,7 +7,7 @@ use iced::{Alignment, Element, Subscription, Theme};
 use std::time::{Duration, Instant};
 
 pub fn main() -> iced::Result {
-    iced::program("Stopwatch - Iced", Stopwatch::update, Stopwatch::view)
+    iced::application("Stopwatch - Iced", Stopwatch::update, Stopwatch::view)
         .subscription(Stopwatch::subscription)
         .theme(Stopwatch::theme)
         .run()
diff --git a/examples/styling/src/main.rs b/examples/styling/src/main.rs
index 57e8f47e..3124493b 100644
--- a/examples/styling/src/main.rs
+++ b/examples/styling/src/main.rs
@@ -6,7 +6,7 @@ use iced::widget::{
 use iced::{Alignment, Element, Length, Theme};
 
 pub fn main() -> iced::Result {
-    iced::program("Styling - Iced", Styling::update, Styling::view)
+    iced::application("Styling - Iced", Styling::update, Styling::view)
         .theme(Styling::theme)
         .run()
 }
diff --git a/examples/system_information/src/main.rs b/examples/system_information/src/main.rs
index e2808edd..363df590 100644
--- a/examples/system_information/src/main.rs
+++ b/examples/system_information/src/main.rs
@@ -2,8 +2,12 @@ use iced::widget::{button, center, column, text};
 use iced::{system, Element, Task};
 
 pub fn main() -> iced::Result {
-    iced::program("System Information - Iced", Example::update, Example::view)
-        .run()
+    iced::application(
+        "System Information - Iced",
+        Example::update,
+        Example::view,
+    )
+    .run()
 }
 
 #[derive(Default)]
diff --git a/examples/the_matrix/src/main.rs b/examples/the_matrix/src/main.rs
index f3a67ac8..2ae1cc3a 100644
--- a/examples/the_matrix/src/main.rs
+++ b/examples/the_matrix/src/main.rs
@@ -11,7 +11,7 @@ use std::cell::RefCell;
 pub fn main() -> iced::Result {
     tracing_subscriber::fmt::init();
 
-    iced::program("The Matrix - Iced", TheMatrix::update, TheMatrix::view)
+    iced::application("The Matrix - Iced", TheMatrix::update, TheMatrix::view)
         .subscription(TheMatrix::subscription)
         .antialiasing(true)
         .run()
diff --git a/examples/toast/src/main.rs b/examples/toast/src/main.rs
index aee2479e..232133b1 100644
--- a/examples/toast/src/main.rs
+++ b/examples/toast/src/main.rs
@@ -9,7 +9,7 @@ use iced::{Alignment, Element, Length, Subscription, Task};
 use toast::{Status, Toast};
 
 pub fn main() -> iced::Result {
-    iced::program("Toast - Iced", App::update, App::view)
+    iced::application("Toast - Iced", App::update, App::view)
         .subscription(App::subscription)
         .run()
 }
diff --git a/examples/todos/src/main.rs b/examples/todos/src/main.rs
index c21e1a96..a834c946 100644
--- a/examples/todos/src/main.rs
+++ b/examples/todos/src/main.rs
@@ -17,7 +17,7 @@ pub fn main() -> iced::Result {
     #[cfg(not(target_arch = "wasm32"))]
     tracing_subscriber::fmt::init();
 
-    iced::program(Todos::title, Todos::update, Todos::view)
+    iced::application(Todos::title, Todos::update, Todos::view)
         .load(Todos::load)
         .subscription(Todos::subscription)
         .font(include_bytes!("../fonts/icons.ttf").as_slice())
diff --git a/examples/tour/src/main.rs b/examples/tour/src/main.rs
index 78086ce9..94ba78ee 100644
--- a/examples/tour/src/main.rs
+++ b/examples/tour/src/main.rs
@@ -16,7 +16,7 @@ pub fn main() -> iced::Result {
     #[cfg(not(target_arch = "wasm32"))]
     tracing_subscriber::fmt::init();
 
-    iced::program(Tour::title, Tour::update, Tour::view)
+    iced::application(Tour::title, Tour::update, Tour::view)
         .centered()
         .run()
 }
diff --git a/examples/url_handler/src/main.rs b/examples/url_handler/src/main.rs
index 3ab19252..50a055f3 100644
--- a/examples/url_handler/src/main.rs
+++ b/examples/url_handler/src/main.rs
@@ -3,7 +3,7 @@ use iced::widget::{center, text};
 use iced::{Element, Subscription};
 
 pub fn main() -> iced::Result {
-    iced::program("URL Handler - Iced", App::update, App::view)
+    iced::application("URL Handler - Iced", App::update, App::view)
         .subscription(App::subscription)
         .run()
 }
diff --git a/examples/vectorial_text/src/main.rs b/examples/vectorial_text/src/main.rs
index 1ed7a2b1..6dd3273a 100644
--- a/examples/vectorial_text/src/main.rs
+++ b/examples/vectorial_text/src/main.rs
@@ -6,7 +6,7 @@ use iced::widget::{
 use iced::{Element, Length, Point, Rectangle, Renderer, Theme, Vector};
 
 pub fn main() -> iced::Result {
-    iced::program(
+    iced::application(
         "Vectorial Text - Iced",
         VectorialText::update,
         VectorialText::view,
diff --git a/examples/visible_bounds/src/main.rs b/examples/visible_bounds/src/main.rs
index b43c0cca..e46d1ff0 100644
--- a/examples/visible_bounds/src/main.rs
+++ b/examples/visible_bounds/src/main.rs
@@ -10,7 +10,7 @@ use iced::{
 };
 
 pub fn main() -> iced::Result {
-    iced::program("Visible Bounds - Iced", Example::update, Example::view)
+    iced::application("Visible Bounds - Iced", Example::update, Example::view)
         .subscription(Example::subscription)
         .theme(|_| Theme::Dark)
         .run()
diff --git a/examples/websocket/src/main.rs b/examples/websocket/src/main.rs
index 8c0fa1d0..8422ce16 100644
--- a/examples/websocket/src/main.rs
+++ b/examples/websocket/src/main.rs
@@ -8,7 +8,7 @@ use iced::{color, Element, Length, Subscription, Task};
 use once_cell::sync::Lazy;
 
 pub fn main() -> iced::Result {
-    iced::program("WebSocket - Iced", WebSocket::update, WebSocket::view)
+    iced::application("WebSocket - Iced", WebSocket::update, WebSocket::view)
         .load(WebSocket::load)
         .subscription(WebSocket::subscription)
         .run()