provide ID to operation.container in applicable widgets

1 files changed, 44 insertions, 9 deletions

diff --git a/native/src/widget/pane_grid.rs b/native/src/widget/pane_grid.rs
index eb04c0ba..6a65754e 100644
--- a/native/src/widget/pane_grid.rs
+++ b/native/src/widget/pane_grid.rs
@@ -101,6 +101,7 @@ where
     Renderer: crate::Renderer,
     Renderer::Theme: StyleSheet + container::StyleSheet,
 {
+    id: Option<Id>,
     contents: Contents<'a, Content<'a, Message, Renderer>>,
     width: Length,
     height: Length,
@@ -147,6 +148,7 @@ where
         };
 
         Self {
+            id: None,
             contents,
             width: Length::Fill,
             height: Length::Fill,
@@ -158,6 +160,12 @@ where
         }
     }
 
+    /// Sets the [`Id`] of the [`PaneGrid`].
+    pub fn id(mut self, id: Id) -> Self {
+        self.id = Some(id);
+        self
+    }
+
     /// Sets the width of the [`PaneGrid`].
     pub fn width(mut self, width: Length) -> Self {
         self.width = width;
@@ -297,15 +305,18 @@ where
         renderer: &Renderer,
         operation: &mut dyn widget::Operation<Message>,
     ) {
-        operation.container(None, &mut |operation| {
-            self.contents
-                .iter()
-                .zip(&mut tree.children)
-                .zip(layout.children())
-                .for_each(|(((_pane, content), state), layout)| {
-                    content.operate(state, layout, renderer, operation);
-                })
-        });
+        operation.container(
+            self.id.as_ref().map(|id| &id.0),
+            &mut |operation| {
+                self.contents
+                    .iter()
+                    .zip(&mut tree.children)
+                    .zip(layout.children())
+                    .for_each(|(((_pane, content), state), layout)| {
+                        content.operate(state, layout, renderer, operation);
+                    })
+            },
+        );
     }
 
     fn on_event(
@@ -996,3 +1007,27 @@ impl<'a, T> Contents<'a, T> {
         matches!(self, Self::Maximized(..))
     }
 }
+
+/// The identifier of a [`PaneGrid`].
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Id(widget::Id);
+
+impl Id {
+    /// Creates a custom [`Id`].
+    pub fn new(id: impl Into<std::borrow::Cow<'static, str>>) -> Self {
+        Self(widget::Id::new(id))
+    }
+
+    /// Creates a unique [`Id`].
+    ///
+    /// This function produces a different [`Id`] every time it is called.
+    pub fn unique() -> Self {
+        Self(widget::Id::unique())
+    }
+}
+
+impl From<Id> for widget::Id {
+    fn from(id: Id) -> Self {
+        id.0
+    }
+}