Merge pull request #1647 from iced-rs/feature/widget-request-redraw

Widget-driven animations

1 files changed, 20 insertions, 0 deletions

diff --git a/native/src/window.rs b/native/src/window.rs
index 1b97e655..a5cdc8ce 100644
--- a/native/src/window.rs
+++ b/native/src/window.rs
@@ -2,9 +2,29 @@
 mod action;
 mod event;
 mod mode;
+mod redraw_request;
 mod user_attention;
 
 pub use action::Action;
 pub use event::Event;
 pub use mode::Mode;
+pub use redraw_request::RedrawRequest;
 pub use user_attention::UserAttention;
+
+use crate::subscription::{self, Subscription};
+use crate::time::Instant;
+
+/// Subscribes to the frames of the window of the running application.
+///
+/// The resulting [`Subscription`] will produce items at a rate equal to the
+/// refresh rate of the window. Note that this rate may be variable, as it is
+/// normally managed by the graphics driver and/or the OS.
+///
+/// In any case, this [`Subscription`] is useful to smoothly draw application-driven
+/// animations without missing any frames.
+pub fn frames() -> Subscription<Instant> {
+    subscription::raw_events(|event, _status| match event {
+        crate::Event::Window(Event::RedrawRequested(at)) => Some(at),
+        _ => None,
+    })
+}