use crate::core::text;
use crate::graphics::compositor;
#[cfg(feature = "winit")]
use crate::shell;
#[cfg(feature = "winit")]
pub use crate::shell::program::{Appearance, DefaultStyle};
use crate::window;
use crate::{Element, Executor, Subscription, Task};
#[cfg(not(feature = "winit"))]
pub use crate::runtime::{Appearance, DefaultStyle};
#[allow(missing_docs)]
pub trait Program: Sized {
type State;
type Message: Send + std::fmt::Debug + 'static;
type Theme: Default + DefaultStyle;
type Renderer: Renderer;
type Executor: Executor;
fn update(
&self,
state: &mut Self::State,
message: Self::Message,
) -> Task<Self::Message>;
fn view<'a>(
&self,
state: &'a Self::State,
window: window::Id,
) -> Element<'a, Self::Message, Self::Theme, Self::Renderer>;
fn title(&self, _state: &Self::State, _window: window::Id) -> String {
String::from("A cool iced application!")
}
fn subscription(
&self,
_state: &Self::State,
) -> Subscription<Self::Message> {
Subscription::none()
}
fn theme(&self, _state: &Self::State, _window: window::Id) -> Self::Theme {
Self::Theme::default()
}
fn style(&self, _state: &Self::State, theme: &Self::Theme) -> Appearance {
DefaultStyle::default_style(theme)
}
fn scale_factor(&self, _state: &Self::State, _window: window::Id) -> f64 {
1.0
}
#[cfg(feature = "winit")]
fn run(
self,
settings: crate::Settings,
window_settings: Option<window::Settings>,
) -> crate::Result
where
Self: 'static,
Self::State: Default,
{
self.run_with(settings, window_settings, || {
(Self::State::default(), Task::none())
})
}
#[cfg(feature = "winit")]
fn run_with<I>(
self,
settings: crate::Settings,
window_settings: Option<window::Settings>,
initialize: I,
) -> crate::Result
where
Self: 'static,
I: FnOnce() -> (Self::State, Task<Self::Message>) + 'static,
{
use std::marker::PhantomData;
struct Instance<P: Program, I> {
program: P,
state: P::State,
_initialize: PhantomData<I>,
}
impl<P: Program, I: FnOnce() -> (P::State, Task<P::Message>)>
shell::Program for Instance<P, I>
{
type Message = P::Message;
type Theme = P::Theme;
type Renderer = P::Renderer;
type Flags = (P, I);
type Executor = P::Executor;
fn new(
(program, initialize): Self::Flags,
) -> (Self, Task<Self::Message>) {
let (state, task) = initialize();
(
Self {
program,
state,
_initialize: PhantomData,
},
task,
)
}
fn title(&self, window: window::Id) -> String {
self.program.title(&self.state, window)
}
fn update(
&mut self,
message: Self::Message,
) -> Task<Self::Message> {
self.program.update(&mut self.state, message)
}
fn view(
&self,
window: window::Id,
) -> crate::Element<'_, Self::Message, Self::Theme, Self::Renderer>
{
self.program.view(&self.state, window)
}
fn subscription(&self) -> Subscription<Self::Message> {
self.program.subscription(&self.state)
}
fn theme(&self, window: window::Id) -> Self::Theme {
self.program.theme(&self.state, window)
}
fn style(&self, theme: &Self::Theme) -> Appearance {
self.program.style(&self.state, theme)
}
fn scale_factor(&self, window: window::Id) -> f64 {
self.program.scale_factor(&self.state, window)
}
}
#[allow(clippy::needless_update)]
let renderer_settings = crate::graphics::Settings {
default_font: settings.default_font,
default_text_size: settings.default_text_size,
antialiasing: if settings.antialiasing {
Some(crate::graphics::Antialiasing::MSAAx4)
} else {
None
},
..crate::graphics::Settings::default()
};
Ok(shell::program::run::<
Instance<Self, I>,
<Self::Renderer as compositor::Default>::Compositor,
>(
crate::Settings {
id: settings.id,
fonts: settings.fonts,
default_font: settings.default_font,
default_text_size: settings.default_text_size,
antialiasing: settings.antialiasing,
exit_on_close_request: settings.exit_on_close_request,
}
.into(),
renderer_settings,
window_settings,
(self, initialize),
)?)
}
}
pub fn with_title<P: Program>(
program: P,
title: impl Fn(&P::State, window::Id) -> String,
) -> impl Program<State = P::State, Message = P::Message, Theme = P::Theme> {
struct WithTitle<P, Title> {
program: P,
title: Title,
}
impl<P, Title> Program for WithTitle<P, Title>
where
P: Program,
Title: Fn(&P::State, window::Id) -> String,
{
type State = P::State;
type Message = P::Message;
type Theme = P::Theme;
type Renderer = P::Renderer;
type Executor = P::Executor;
fn title(&self, state: &Self::State, window: window::Id) -> String {
(self.title)(state, window)
}
fn update(
&self,
state: &mut Self::State,
message: Self::Message,
) -> Task<Self::Message> {
self.program.update(state, message)
}
fn view<'a>(
&self,
state: &'a Self::State,
window: window::Id,
) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
self.program.view(state, window)
}
fn theme(
&self,
state: &Self::State,
window: window::Id,
) -> Self::Theme {
self.program.theme(state, window)
}
fn subscription(
&self,
state: &Self::State,
) -> Subscription<Self::Message> {
self.program.subscription(state)
}
fn style(
&self,
state: &Self::State,
theme: &Self::Theme,
) -> Appearance {
self.program.style(state, theme)
}
fn scale_factor(&self, state: &Self::State, window: window::Id) -> f64 {
self.program.scale_factor(state, window)
}
}
WithTitle { program, title }
}
pub fn with_subscription<P: Program>(
program: P,
f: impl Fn(&P::State) -> Subscription<P::Message>,
) -> impl Program<State = P::State, Message = P::Message, Theme = P::Theme> {
struct WithSubscription<P, F> {
program: P,
subscription: F,
}
impl<P: Program, F> Program for WithSubscription<P, F>
where
F: Fn(&P::State) -> Subscription<P::Message>,
{
type State = P::State;
type Message = P::Message;
type Theme = P::Theme;
type Renderer = P::Renderer;
type Executor = P::Executor;
fn subscription(
&self,
state: &Self::State,
) -> Subscription<Self::Message> {
(self.subscription)(state)
}
fn update(
&self,
state: &mut Self::State,
message: Self::Message,
) -> Task<Self::Message> {
self.program.update(state, message)
}
fn view<'a>(
&self,
state: &'a Self::State,
window: window::Id,
) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
self.program.view(state, window)
}
fn title(&self, state: &Self::State, window: window::Id) -> String {
self.program.title(state, window)
}
fn theme(
&self,
state: &Self::State,
window: window::Id,
) -> Self::Theme {
self.program.theme(state, window)
}
fn style(
&self,
state: &Self::State,
theme: &Self::Theme,
) -> Appearance {
self.program.style(state, theme)
}
fn scale_factor(&self, state: &Self::State, window: window::Id) -> f64 {
self.program.scale_factor(state, window)
}
}
WithSubscription {
program,
subscription: f,
}
}
pub fn with_theme<P: Program>(
program: P,
f: impl Fn(&P::State, window::Id) -> P::Theme,
) -> impl Program<State = P::State, Message = P::Message, Theme = P::Theme> {
struct WithTheme<P, F> {
program: P,
theme: F,
}
impl<P: Program, F> Program for WithTheme<P, F>
where
F: Fn(&P::State, window::Id) -> P::Theme,
{
type State = P::State;
type Message = P::Message;
type Theme = P::Theme;
type Renderer = P::Renderer;
type Executor = P::Executor;
fn theme(
&self,
state: &Self::State,
window: window::Id,
) -> Self::Theme {
(self.theme)(state, window)
}
fn title(&self, state: &Self::State, window: window::Id) -> String {
self.program.title(state, window)
}
fn update(
&self,
state: &mut Self::State,
message: Self::Message,
) -> Task<Self::Message> {
self.program.update(state, message)
}
fn view<'a>(
&self,
state: &'a Self::State,
window: window::Id,
) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
self.program.view(state, window)
}
fn subscription(
&self,
state: &Self::State,
) -> Subscription<Self::Message> {
self.program.subscription(state)
}
fn style(
&self,
state: &Self::State,
theme: &Self::Theme,
) -> Appearance {
self.program.style(state, theme)
}
fn scale_factor(&self, state: &Self::State, window: window::Id) -> f64 {
self.program.scale_factor(state, window)
}
}
WithTheme { program, theme: f }
}
pub fn with_style<P: Program>(
program: P,
f: impl Fn(&P::State, &P::Theme) -> Appearance,
) -> impl Program<State = P::State, Message = P::Message, Theme = P::Theme> {
struct WithStyle<P, F> {
program: P,
style: F,
}
impl<P: Program, F> Program for WithStyle<P, F>
where
F: Fn(&P::State, &P::Theme) -> Appearance,
{
type State = P::State;
type Message = P::Message;
type Theme = P::Theme;
type Renderer = P::Renderer;
type Executor = P::Executor;
fn style(
&self,
state: &Self::State,
theme: &Self::Theme,
) -> Appearance {
(self.style)(state, theme)
}
fn title(&self, state: &Self::State, window: window::Id) -> String {
self.program.title(state, window)
}
fn update(
&self,
state: &mut Self::State,
message: Self::Message,
) -> Task<Self::Message> {
self.program.update(state, message)
}
fn view<'a>(
&self,
state: &'a Self::State,
window: window::Id,
) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
self.program.view(state, window)
}
fn subscription(
&self,
state: &Self::State,
) -> Subscription<Self::Message> {
self.program.subscription(state)
}
fn theme(
&self,
state: &Self::State,
window: window::Id,
) -> Self::Theme {
self.program.theme(state, window)
}
fn scale_factor(&self, state: &Self::State, window: window::Id) -> f64 {
self.program.scale_factor(state, window)
}
}
WithStyle { program, style: f }
}
pub fn with_scale_factor<P: Program>(
program: P,
f: impl Fn(&P::State, window::Id) -> f64,
) -> impl Program<State = P::State, Message = P::Message, Theme = P::Theme> {
struct WithScaleFactor<P, F> {
program: P,
scale_factor: F,
}
impl<P: Program, F> Program for WithScaleFactor<P, F>
where
F: Fn(&P::State, window::Id) -> f64,
{
type State = P::State;
type Message = P::Message;
type Theme = P::Theme;
type Renderer = P::Renderer;
type Executor = P::Executor;
fn title(&self, state: &Self::State, window: window::Id) -> String {
self.program.title(state, window)
}
fn update(
&self,
state: &mut Self::State,
message: Self::Message,
) -> Task<Self::Message> {
self.program.update(state, message)
}
fn view<'a>(
&self,
state: &'a Self::State,
window: window::Id,
) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
self.program.view(state, window)
}
fn subscription(
&self,
state: &Self::State,
) -> Subscription<Self::Message> {
self.program.subscription(state)
}
fn theme(
&self,
state: &Self::State,
window: window::Id,
) -> Self::Theme {
self.program.theme(state, window)
}
fn style(
&self,
state: &Self::State,
theme: &Self::Theme,
) -> Appearance {
self.program.style(state, theme)
}
fn scale_factor(&self, state: &Self::State, window: window::Id) -> f64 {
(self.scale_factor)(state, window)
}
}
WithScaleFactor {
program,
scale_factor: f,
}
}
pub fn with_executor<P: Program, E: Executor>(
program: P,
) -> impl Program<State = P::State, Message = P::Message, Theme = P::Theme> {
use std::marker::PhantomData;
struct WithExecutor<P, E> {
program: P,
executor: PhantomData<E>,
}
impl<P: Program, E> Program for WithExecutor<P, E>
where
E: Executor,
{
type State = P::State;
type Message = P::Message;
type Theme = P::Theme;
type Renderer = P::Renderer;
type Executor = E;
fn title(&self, state: &Self::State, window: window::Id) -> String {
self.program.title(state, window)
}
fn update(
&self,
state: &mut Self::State,
message: Self::Message,
) -> Task<Self::Message> {
self.program.update(state, message)
}
fn view<'a>(
&self,
state: &'a Self::State,
window: window::Id,
) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
self.program.view(state, window)
}
fn subscription(
&self,
state: &Self::State,
) -> Subscription<Self::Message> {
self.program.subscription(state)
}
fn theme(
&self,
state: &Self::State,
window: window::Id,
) -> Self::Theme {
self.program.theme(state, window)
}
fn style(
&self,
state: &Self::State,
theme: &Self::Theme,
) -> Appearance {
self.program.style(state, theme)
}
fn scale_factor(&self, state: &Self::State, window: window::Id) -> f64 {
self.program.scale_factor(state, window)
}
}
WithExecutor {
program,
executor: PhantomData::<E>,
}
}
pub trait Renderer: text::Renderer + compositor::Default {}
impl<T> Renderer for T where T: text::Renderer + compositor::Default {}