macOS: Do not coalesce mouse events to allow precise control (#327)

CHANGES.md

@@ -2,6 +2,7 @@
 ## Changed
 - all: The keys `Print` and `Snapshot` were deprecated because `Print` had the wrong virtual key associated with it on Windows. Use `Key::PrintScr` instead
 - macOS: The simulated input is no longer effected by the state of the physical keyboard. This default behavior can be changed via the Settings (`independent_of_keyboard_state`)
+- macOS: Do not coalesce mouse events to allow precise control
 
 ## Added
 - all: `Key::PrintScr`

src/macos/macos_impl.rs

@@ -14,8 +14,8 @@ use core_foundation::{
 use core_graphics::{
     display::{CGDisplay, CGPoint},
     event::{
-        CGEvent, CGEventRef, CGEventTapLocation, CGEventType, CGKeyCode, CGMouseButton, EventField,
-        KeyCode, ScrollEventUnit,
+        CGEvent, CGEventFlags, CGEventRef, CGEventTapLocation, CGEventType, CGKeyCode,
+        CGMouseButton, EventField, KeyCode, ScrollEventUnit,
     },
     event_source::{CGEventSource, CGEventSourceStateID},
 };
@@ -120,6 +120,7 @@ impl Mouse for Enigo {
                 EventField::EVENT_SOURCE_USER_DATA,
                 self.event_source_user_data,
             );
+            event.set_flags(CGEventFlags::CGEventFlagNonCoalesced);
             event.post(CGEventTapLocation::HID);
         }
         if direction == Direction::Click || direction == Direction::Release {
@@ -150,6 +151,7 @@ impl Mouse for Enigo {
                 EventField::EVENT_SOURCE_USER_DATA,
                 self.event_source_user_data,
             );
+            event.set_flags(CGEventFlags::CGEventFlagNonCoalesced);
             event.post(CGEventTapLocation::HID);
         }
         Ok(())
@@ -199,6 +201,7 @@ impl Mouse for Enigo {
             EventField::EVENT_SOURCE_USER_DATA,
             self.event_source_user_data,
         );
+        event.set_flags(CGEventFlags::CGEventFlagNonCoalesced);
         event.post(CGEventTapLocation::HID);
         Ok(())
     }
@@ -226,6 +229,7 @@ impl Mouse for Enigo {
             EventField::EVENT_SOURCE_USER_DATA,
             self.event_source_user_data,
         );
+        event.set_flags(CGEventFlags::CGEventFlagNonCoalesced);
         event.post(CGEventTapLocation::HID);
         Ok(())
     }