Invalidate widget tree from `Responsive` widget

... by introducing a new `invalidate_widgets` method to `Shell`

1 files changed, 19 insertions, 1 deletions

diff --git a/native/src/shell.rs b/native/src/shell.rs
index e916f52d..4a0aa9c6 100644
--- a/native/src/shell.rs
+++ b/native/src/shell.rs
@@ -8,6 +8,7 @@
 pub struct Shell<'a, Message> {
     messages: &'a mut Vec<Message>,
     is_layout_invalid: bool,
+    are_widgets_invalid: bool,
 }
 
 impl<'a, Message> Shell<'a, Message> {
@@ -16,12 +17,13 @@ impl<'a, Message> Shell<'a, Message> {
         Self {
             messages,
             is_layout_invalid: false,
+            are_widgets_invalid: false,
         }
     }
 
     /// Triggers the given function if the layout is invalid, cleaning it in the
     /// process.
-    pub fn with_invalid_layout(&mut self, f: impl FnOnce()) {
+    pub fn revalidate_layout(&mut self, f: impl FnOnce()) {
         if self.is_layout_invalid {
             self.is_layout_invalid = false;
 
@@ -41,6 +43,13 @@ impl<'a, Message> Shell<'a, Message> {
         self.is_layout_invalid = true;
     }
 
+    /// Invalidates the current application widgets.
+    ///
+    /// The shell will rebuild and relayout the widget tree.
+    pub fn invalidate_widgets(&mut self) {
+        self.are_widgets_invalid = true;
+    }
+
     /// Merges the current [`Shell`] with another one by applying the given
     /// function to the messages of the latter.
     ///
@@ -50,5 +59,14 @@ impl<'a, Message> Shell<'a, Message> {
 
         self.is_layout_invalid =
             self.is_layout_invalid || other.is_layout_invalid;
+
+        self.are_widgets_invalid =
+            self.are_widgets_invalid || other.are_widgets_invalid;
+    }
+
+    /// Returns whether the widgets of the current application have been
+    /// invalidated.
+    pub fn are_widgets_invalid(&self) -> bool {
+        self.are_widgets_invalid
     }
 }