fetch_position command for window module

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Default `disabled` style for `checkbox` and `hovered` style for `Svg`. [#2273](https://github.com/iced-rs/iced/pull/2273)
 - `From<u16>` and `From<i32>` implementations for `border::Radius`. [#2274](https://github.com/iced-rs/iced/pull/2274)
 - `size_hint` method for `Component` trait. [#2275](https://github.com/iced-rs/iced/pull/2275)
+- `fetch_position` command in `window` module. [#2280](https://github.com/iced-rs/iced/pull/2280)
 
 ### Fixed
 - Black images when using OpenGL backend in `iced_wgpu`. [#2259](https://github.com/iced-rs/iced/pull/2259)
@@ -22,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 Many thanks to...
 
+- @n1ght-hunter
 - @PolyMeilex
 - @rizzen-yazston
 - @wash2

runtime/src/window.rs

@@ -101,6 +101,17 @@ pub fn minimize<Message>(id: Id, minimized: bool) -> Command<Message> {
     Command::single(command::Action::Window(Action::Minimize(id, minimized)))
 }
 
+/// Fetches the current window position in logical coordinates.
+pub fn fetch_position<Message>(
+    id: Id,
+    f: impl FnOnce(Option<Point>) -> Message + 'static,
+) -> Command<Message> {
+    Command::single(command::Action::Window(Action::FetchPosition(
+        id,
+        Box::new(f),
+    )))
+}
+
 /// Moves the window to the given logical coordinates.
 pub fn move_to<Message>(id: Id, position: Point) -> Command<Message> {
     Command::single(command::Action::Window(Action::Move(id, position)))

runtime/src/window/action.rs

@@ -38,6 +38,8 @@ pub enum Action<T> {
     FetchMinimized(Id, Box<dyn FnOnce(Option<bool>) -> T + 'static>),
     /// Set the window to minimized or back
     Minimize(Id, bool),
+    /// Fetch the current logical coordinates of the window.
+    FetchPosition(Id, Box<dyn FnOnce(Option<Point>) -> T + 'static>),
     /// Move the window to the given logical coordinates.
     ///
     /// Unsupported on Wayland.
@@ -134,6 +136,9 @@ impl<T> Action<T> {
                 Action::FetchMinimized(id, Box::new(move |s| f(o(s))))
             }
             Self::Minimize(id, minimized) => Action::Minimize(id, minimized),
+            Self::FetchPosition(id, o) => {
+                Action::FetchPosition(id, Box::new(move |s| f(o(s))))
+            }
             Self::Move(id, position) => Action::Move(id, position),
             Self::ChangeMode(id, mode) => Action::ChangeMode(id, mode),
             Self::FetchMode(id, o) => {
@@ -186,6 +191,9 @@ impl<T> fmt::Debug for Action<T> {
             Self::Minimize(id, minimized) => {
                 write!(f, "Action::Minimize({id:?}, {minimized}")
             }
+            Self::FetchPosition(id, _) => {
+                write!(f, "Action::FetchPosition({id:?})")
+            }
             Self::Move(id, position) => {
                 write!(f, "Action::Move({id:?}, {position})")
             }

winit/src/application.rs

@@ -10,7 +10,7 @@ use crate::core::renderer;
 use crate::core::time::Instant;
 use crate::core::widget::operation;
 use crate::core::window;
-use crate::core::{Event, Size};
+use crate::core::{Event, Point, Size};
 use crate::futures::futures;
 use crate::futures::{Executor, Runtime, Subscription};
 use crate::graphics::compositor::{self, Compositor};
@@ -767,6 +767,21 @@ pub fn run_command<A, C, E>(
                 window::Action::Minimize(_id, minimized) => {
                     window.set_minimized(minimized);
                 }
+                window::Action::FetchPosition(_id, callback) => {
+                    let position = window
+                        .inner_position()
+                        .map(|position| {
+                            let position = position
+                                .to_logical::<f32>(window.scale_factor());
+
+                            Point::new(position.x, position.y)
+                        })
+                        .ok();
+
+                    proxy
+                        .send_event(callback(position))
+                        .expect("Send message to event loop");
+                }
                 window::Action::Move(_id, position) => {
                     window.set_outer_position(winit::dpi::LogicalPosition {
                         x: position.x,

winit/src/multi_window.rs

@@ -10,7 +10,7 @@ use crate::core::mouse;
 use crate::core::renderer;
 use crate::core::widget::operation;
 use crate::core::window;
-use crate::core::Size;
+use crate::core::{Point, Size};
 use crate::futures::futures::channel::mpsc;
 use crate::futures::futures::{task, Future, StreamExt};
 use crate::futures::{Executor, Runtime, Subscription};
@@ -993,6 +993,25 @@ fn run_command<A, C, E>(
                         window.raw.set_minimized(minimized);
                     }
                 }
+                window::Action::FetchPosition(id, callback) => {
+                    if let Some(window) = window_manager.get_mut(id) {
+                        let position = window
+                            .raw
+                            .inner_position()
+                            .map(|position| {
+                                let position = position.to_logical::<f32>(
+                                    window.raw.scale_factor(),
+                                );
+
+                                Point::new(position.x, position.y)
+                            })
+                            .ok();
+
+                        proxy
+                            .send_event(callback(position))
+                            .expect("Send message to event loop");
+                    }
+                }
                 window::Action::Move(id, position) => {
                     if let Some(window) = window_manager.get_mut(id) {
                         window.raw.set_outer_position(