From 19b6a2f701379ba2ed5177a091c513d3d7e64a2f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Joakim=20Frosteg=C3=A5rd?= <joakim.frostegard@gmail.com>
Date: Sat, 5 Dec 2020 01:48:26 +0100
Subject: [PATCH] macOS: handle changed flags

This enables catching pressed modifier keys with no other
keys pressed
---
 src/macos/view.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/macos/view.rs b/src/macos/view.rs
index 293fc04..74a132c 100644
--- a/src/macos/view.rs
+++ b/src/macos/view.rs
@@ -149,6 +149,10 @@ unsafe fn create_view_class<H: WindowHandler>() -> &'static Class {
         sel!(keyUp:),
         key_up::<H> as extern "C" fn(&Object, Sel, id),
     );
+    class.add_method(
+        sel!(flagsChanged:),
+        flags_changed::<H> as extern "C" fn(&Object, Sel, id),
+    );
 
     class.add_ivar::<*mut c_void>(WINDOW_STATE_IVAR_NAME);
     class.add_ivar::<*mut c_void>(FRAME_TIMER_IVAR_NAME);
@@ -388,6 +392,17 @@ extern "C" fn key_up<H: WindowHandler>(this: &Object, _: Sel, event: id){
         WindowState::from_field(this)
     };
 
+    if let Some(key_event) = state.process_native_key_event(event){
+        state.trigger_event(Event::Keyboard(key_event));
+    }
+}
+
+
+extern "C" fn flags_changed<H: WindowHandler>(this: &Object, _: Sel, event: id){
+    let state: &mut WindowState<H> = unsafe {
+        WindowState::from_field(this)
+    };
+
     if let Some(key_event) = state.process_native_key_event(event){
         state.trigger_event(Event::Keyboard(key_event));
     }