Develop a pattern to detect clicking outside of a focused child

fitnesstrax/app/src/components/day.rs

@@ -20,7 +20,7 @@ use dimensioned::si;
 use ft_core::{RecordType, TimeDistance, TraxRecord, Weight};
 use glib::Object;
 use gtk::{prelude::*, subclass::prelude::*};
-use std::cell::RefCell;
+use std::{cell::RefCell, rc::Rc};
 
 pub struct DaySummaryPrivate {
     date: gtk::Label,
@@ -132,6 +132,19 @@ impl DayDetail {
         let s: Self = Object::builder().build();
         s.set_orientation(gtk::Orientation::Vertical);
 
+        let click_controller = gtk::GestureClick::new();
+        click_controller.connect_released({
+            let s = s.clone();
+            move |_, _, _, _| {
+                println!("clicked outside of focusable entity");
+                if let Some(widget) = s.focus_child().and_downcast_ref::<WeightView>() {
+                    println!("focused child is the weight view");
+                    widget.blur();
+                }
+            }
+        });
+        s.add_controller(click_controller);
+
         let weight_record = records.iter().find_map(|record| match record {
             TraxRecord::Weight(record) => Some(record.clone()),
             _ => None,
@@ -179,6 +192,7 @@ pub struct WeightViewPrivate {
     view: RefCell<gtk::Label>,
     edit: RefCell<gtk::Entry>,
     current: RefCell<gtk::Widget>,
+    on_edit_finished: RefCell<Box<dyn Fn(si::Kilogram<f64>)>>,
 }
 
 impl Default for WeightViewPrivate {
@@ -197,6 +211,7 @@ impl Default for WeightViewPrivate {
             view: RefCell::new(view),
             edit: RefCell::new(edit),
             current: RefCell::new(current.upcast()),
+            on_edit_finished: RefCell::new(Box::new(|_| {})),
         }
     }
 }
@@ -217,12 +232,14 @@ glib::wrapper! {
 }
 
 impl WeightView {
-    pub fn new<OnBlur>(weight: Option<Weight>, on_blur: OnBlur) -> Self
+    pub fn new<OnEditFinished>(weight: Option<Weight>, on_edit_finished: OnEditFinished) -> Self
     where
-        OnBlur: Fn(si::Kilogram<f64>),
+        OnEditFinished: Fn(si::Kilogram<f64>) + 'static,
     {
         let s: Self = Object::builder().build();
 
+        *s.imp().on_edit_finished.borrow_mut() = Box::new(on_edit_finished);
+
         *s.imp().record.borrow_mut() = weight;
         s.view();
 
@@ -234,16 +251,7 @@ impl WeightView {
             }
         });
 
-        let edit_click_controller = gtk::GestureClick::new();
-        edit_click_controller.connect_released({
-            let s = s.clone();
-            move |_, _, _, _| {
-                s.view();
-            }
-        });
-
         s.imp().view.borrow().add_controller(view_click_controller);
-        s.imp().edit.borrow().add_controller(edit_click_controller);
         s
     }
 
@@ -278,6 +286,13 @@ impl WeightView {
         self.append(&new_view);
         *current = new_view;
     }
+
+    fn blur(&self) {
+        if *self.imp().current.borrow() == *self.imp().edit.borrow() {
+            self.imp().on_edit_finished.borrow()(0. * si::KG);
+            self.view();
+        }
+    }
 }
 
 #[derive(Default)]