Introduce explicit `id` field to `Settings`

... and use it to set the application id of the window on Unix systems, instead of relying on the title of the application.

2 files changed, 13 insertions, 1 deletions

diff --git a/winit/src/application.rs b/winit/src/application.rs
index 1d32a5f3..c43eed11 100644
--- a/winit/src/application.rs
+++ b/winit/src/application.rs
@@ -152,6 +152,7 @@ where
             &application.title(),
             application.mode(),
             event_loop.primary_monitor(),
+            settings.id,
         )
         .with_menu(Some(conversion::menu(&application.menu())))
         .build(&event_loop)
diff --git a/winit/src/settings.rs b/winit/src/settings.rs
index 6051e5bc..72a1a24a 100644
--- a/winit/src/settings.rs
+++ b/winit/src/settings.rs
@@ -16,6 +16,12 @@ use winit::window::WindowBuilder;
 /// The settings of an application.
 #[derive(Debug, Clone, Default)]
 pub struct Settings<Flags> {
+    /// The identifier of the application.
+    ///
+    /// If provided, this identifier may be used to identify the application or
+    /// communicate with it through the windowing system.
+    pub id: Option<String>,
+
     /// The [`Window`] settings
     pub window: Window,
 
@@ -70,6 +76,7 @@ impl Window {
         title: &str,
         mode: Mode,
         primary_monitor: Option<MonitorHandle>,
+        _id: Option<String>,
     ) -> WindowBuilder {
         let mut window_builder = WindowBuilder::new();
 
@@ -112,7 +119,10 @@ impl Window {
         ))]
         {
             use ::winit::platform::unix::WindowBuilderExtUnix;
-            window_builder = window_builder.with_app_id(title.to_string());
+
+            if let Some(id) = _id {
+                window_builder = window_builder.with_app_id(id);
+            }
         }
 
         #[cfg(target_os = "windows")]
@@ -122,6 +132,7 @@ impl Window {
             if let Some(parent) = self.platform_specific.parent {
                 window_builder = window_builder.with_parent_window(parent);
             }
+
             window_builder = window_builder
                 .with_drag_and_drop(self.platform_specific.drag_and_drop);
         }