Merge pull request #1589 from Night-Hunter-NF/FetchWindowId

add action to get window id

2 files changed, 14 insertions, 0 deletions

diff --git a/winit/src/application.rs b/winit/src/application.rs
index 1f37ffef..3fdec658 100644
--- a/winit/src/application.rs
+++ b/winit/src/application.rs
@@ -794,6 +794,11 @@ pub fn run_command<A, E>(
                 window::Action::ChangeAlwaysOnTop(on_top) => {
                     window.set_always_on_top(on_top);
                 }
+                window::Action::FetchId(tag) => {
+                    proxy
+                        .send_event(tag(window.id().into()))
+                        .expect("Send message to event loop");
+                }
             },
             command::Action::System(action) => match action {
                 system::Action::QueryInformation(_tag) => {
diff --git a/winit/src/window.rs b/winit/src/window.rs
index 3d5a765b..961562bd 100644
--- a/winit/src/window.rs
+++ b/winit/src/window.rs
@@ -95,3 +95,12 @@ pub fn change_always_on_top<Message>(on_top: bool) -> Command<Message> {
         on_top,
     )))
 }
+
+/// Fetches an identifier unique to the window.
+pub fn fetch_id<Message>(
+    f: impl FnOnce(u64) -> Message + 'static,
+) -> Command<Message> {
+    Command::single(command::Action::Window(window::Action::FetchId(Box::new(
+        f,
+    ))))
+}