feat(context-menu): returns dismiss result on Windows

src/items/submenu.rs

@@ -217,7 +217,7 @@ impl ContextMenu for Submenu {
     }
 
     #[cfg(target_os = "windows")]
-    unsafe fn show_context_menu_for_hwnd(&self, hwnd: isize, position: Option<Position>) {
+    unsafe fn show_context_menu_for_hwnd(&self, hwnd: isize, position: Option<Position>) -> bool {
         self.inner
             .borrow_mut()
             .show_context_menu_for_hwnd(hwnd, position)

src/lib.rs

@@ -311,11 +311,17 @@ pub trait ContextMenu {
     ///
     /// - `position` is relative to the window top-left corner, if `None`, the cursor position is used.
     ///
+    /// Returns `true` if menu tracking ended because an item was selected, and `false` if menu tracking was cancelled for any reason.
+    ///
     /// # Safety
     ///
     /// The `hwnd` must be a valid window HWND.
     #[cfg(target_os = "windows")]
-    unsafe fn show_context_menu_for_hwnd(&self, hwnd: isize, position: Option<dpi::Position>);
+    unsafe fn show_context_menu_for_hwnd(
+        &self,
+        hwnd: isize,
+        position: Option<dpi::Position>,
+    ) -> bool;
 
     /// Attach the menu subclass handler to the given hwnd
     /// so you can recieve events from that window using [MenuEvent::receiver]

src/menu.rs

@@ -375,7 +375,7 @@ impl ContextMenu for Menu {
     }
 
     #[cfg(target_os = "windows")]
-    unsafe fn show_context_menu_for_hwnd(&self, hwnd: isize, position: Option<Position>) {
+    unsafe fn show_context_menu_for_hwnd(&self, hwnd: isize, position: Option<Position>) -> bool {
         self.inner
             .borrow_mut()
             .show_context_menu_for_hwnd(hwnd, position)

src/platform_impl/windows/mod.rs

@@ -415,11 +415,19 @@ impl Menu {
             .unwrap_or(false)
     }
 
-    pub unsafe fn show_context_menu_for_hwnd(&mut self, hwnd: isize, position: Option<Position>) {
+    pub unsafe fn show_context_menu_for_hwnd(
+        &mut self,
+        hwnd: isize,
+        position: Option<Position>,
+    ) -> bool {
         let rc = show_context_menu(hwnd as _, self.hpopupmenu, position);
         if let Some(item) = rc.and_then(|rc| self.find_by_id(rc)) {
-            menu_selected(hwnd as _, &mut item.borrow_mut());
+            unsafe {
+                menu_selected(hwnd as _, &mut item.borrow_mut());
+            }
+            return true;
         }
+        false
     }
 
     pub unsafe fn set_theme_for_hwnd(&self, hwnd: isize, theme: MenuTheme) -> crate::Result<()> {
@@ -921,13 +929,19 @@ impl MenuChild {
             .collect()
     }
 
-    pub unsafe fn show_context_menu_for_hwnd(&mut self, hwnd: isize, position: Option<Position>) {
+    pub unsafe fn show_context_menu_for_hwnd(
+        &mut self,
+        hwnd: isize,
+        position: Option<Position>,
+    ) -> bool {
         let rc = show_context_menu(hwnd as _, self.hpopupmenu, position);
         if let Some(item) = rc.and_then(|rc| self.find_by_id(rc)) {
             unsafe {
                 menu_selected(hwnd as _, &mut item.borrow_mut());
             }
+            return true;
         }
+        false
     }
 
     pub unsafe fn attach_menu_subclass_for_hwnd(&self, hwnd: isize) {