feat: prepair for open new window

iced_examples/counter_muti/src/main.rs

@@ -44,6 +44,7 @@ impl MultiApplication for Counter {
     type Flags = ();
     type Theme = Theme;
     type Executor = iced::executor::Default;
+    type WindowInfo = ();
 
     fn new(_flags: ()) -> (Self, Command<Message>) {
         (

iced_layershell/src/lib.rs

@@ -218,6 +218,8 @@ pub trait MultiApplication: Sized {
     /// The data needed to initialize your [`Application`].
     type Flags;
 
+    type WindowInfo;
+
     type Theme: Default + StyleSheet;
 
     /// Initializes the [`Application`] with the flags provided to
@@ -238,6 +240,9 @@ pub trait MultiApplication: Sized {
     /// title of your window when necessary.
     fn namespace(&self) -> String;
 
+    fn id_info(&self, _id: iced_core::window::Id) -> Option<Self::WindowInfo> {
+        None
+    }
     /// Handles a __message__ and updates the state of the [`Application`].
     ///
     /// This is where you define your __update logic__. All the __messages__,
@@ -356,6 +361,8 @@ where
 {
     type Flags = A::Flags;
 
+    type WindowInfo = A::WindowInfo;
+
     fn new(flags: Self::Flags) -> (Self, Command<A::Message>) {
         let (app, command) = A::new(flags);
 
@@ -381,4 +388,8 @@ where
     fn scale_factor(&self, window: iced::window::Id) -> f64 {
         self.0.scale_factor(window)
     }
+
+    fn id_info(&self, id: iced_core::window::Id) -> Option<Self::WindowInfo> {
+        self.0.id_info(id)
+    }
 }

iced_layershell/src/multi_window.rs

@@ -57,6 +57,8 @@ where
     /// The data needed to initialize your [`Application`].
     type Flags;
 
+    type WindowInfo;
+
     /// Initializes the [`Application`] with the flags provided to
     /// [`run`] as part of the [`Settings`].
     ///
@@ -76,6 +78,8 @@ where
         self.namespace()
     }
 
+    fn id_info(&self, _id: iced_core::window::Id) -> Option<Self::WindowInfo>;
+
     /// Returns the current [`Theme`] of the [`Application`].
     fn theme(&self) -> Self::Theme;