dock right click menu

examples/dock/dock_item/imp.rs

@@ -1,5 +1,9 @@
+use glib::subclass::Signal;
 use gtk4::glib;
+use gtk4::prelude::*;
 use gtk4::subclass::prelude::*;
+use gtk4::PopoverMenu;
+use once_cell::sync::Lazy;
 use std::cell::RefCell;
 use std::rc::Rc;
 
@@ -7,6 +11,8 @@ use std::rc::Rc;
 pub struct DockItem {
     pub image: Rc<RefCell<gtk4::Image>>,
     pub dots: Rc<RefCell<gtk4::Label>>,
+    pub item_box: Rc<RefCell<gtk4::Box>>,
+    pub popover_menu: Rc<RefCell<Option<PopoverMenu>>>,
 }
 
 #[glib::object_subclass]
@@ -16,7 +22,22 @@ impl ObjectSubclass for DockItem {
     type ParentType = gtk4::Button;
 }
 
-impl ObjectImpl for DockItem {}
+impl ObjectImpl for DockItem {
+    fn signals() -> &'static [Signal] {
+        static SIGNALS: Lazy<Vec<Signal>> = Lazy::new(|| {
+            vec![Signal::builder(
+                // Signal name
+                "popover-closed",
+                // Types of the values which will be sent to the signal handler
+                &[],
+                // Type of the value the signal handler sends back
+                <()>::static_type().into(),
+            )
+            .build()]
+        });
+        SIGNALS.as_ref()
+    }
+}
 
 impl WidgetImpl for DockItem {}