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-rw-r--r--lazy/src/component.rs35
-rw-r--r--lazy/src/responsive.rs6
2 files changed, 39 insertions, 2 deletions
diff --git a/lazy/src/component.rs b/lazy/src/component.rs
index ad15d69d..d8f21f8a 100644
--- a/lazy/src/component.rs
+++ b/lazy/src/component.rs
@@ -46,6 +46,16 @@ pub trait Component<Message, Renderer> {
/// Produces the widgets of the [`Component`], which may trigger an [`Event`](Component::Event)
/// on user interaction.
fn view(&self, state: &Self::State) -> Element<'_, Self::Event, Renderer>;
+
+ /// Update the [`Component`] state based on the provided [`Operation`](widget::Operation)
+ ///
+ /// By default, it does nothing.
+ fn operate(
+ &self,
+ _state: &mut Self::State,
+ _operation: &mut dyn widget::Operation<Message>,
+ ) {
+ }
}
/// Turns an implementor of [`Component`] into an [`Element`] that can be
@@ -106,6 +116,26 @@ where
);
}
+ fn rebuild_element_with_operation(
+ &self,
+ state: &mut S,
+ operation: &mut dyn widget::Operation<Message>,
+ ) {
+ let heads = self.state.borrow_mut().take().unwrap().into_heads();
+
+ heads.component.operate(state, operation);
+
+ *self.state.borrow_mut() = Some(
+ StateBuilder {
+ component: heads.component,
+ message: PhantomData,
+ state: PhantomData,
+ element_builder: |component| Some(component.view(state)),
+ }
+ .build(),
+ );
+ }
+
fn with_element<T>(
&self,
f: impl FnOnce(&Element<'_, Event, Renderer>) -> T,
@@ -237,6 +267,11 @@ where
renderer: &Renderer,
operation: &mut dyn widget::Operation<Message>,
) {
+ self.rebuild_element_with_operation(
+ tree.state.downcast_mut(),
+ operation,
+ );
+
struct MapOperation<'a, B> {
operation: &'a mut dyn widget::Operation<B>,
}
diff --git a/lazy/src/responsive.rs b/lazy/src/responsive.rs
index 945c935a..52badda2 100644
--- a/lazy/src/responsive.rs
+++ b/lazy/src/responsive.rs
@@ -280,12 +280,14 @@ where
);
let Content {
- element, layout, ..
+ element,
+ layout: content_layout,
+ ..
} = content.deref_mut();
let content_layout = Layout::with_offset(
layout.bounds().position() - Point::ORIGIN,
- layout,
+ content_layout,
);
element