@@ -383,6 +383,10 @@ impl FlutterEngine {
383383}
384384
385385pub fn send_window_metrics_event ( & self , width : usize , height : usize , pixel_ratio : f64 ) {
386+ if !self . is_platform_thread ( ) {
387+ panic ! ( "Not on platform thread" ) ;
388+ }
389+
386390let event = flutter_engine_sys:: FlutterWindowMetricsEvent {
387391struct_size : std:: mem:: size_of :: < flutter_engine_sys:: FlutterWindowMetricsEvent > ( ) ,
388392 width,
@@ -407,6 +411,10 @@ impl FlutterEngine {
407411device_kind : FlutterPointerDeviceKind ,
408412buttons : FlutterPointerMouseButtons ,
409413) {
414+ if !self . is_platform_thread ( ) {
415+ panic ! ( "Not on platform thread" ) ;
416+ }
417+
410418let timestamp =SystemTime :: now ( ) . duration_since ( UNIX_EPOCH ) . unwrap ( ) ;
411419let buttons: flutter_engine_sys:: FlutterPointerMouseButtons = buttons. into ( ) ;
412420let event = flutter_engine_sys:: FlutterPointerEvent {
@@ -436,6 +444,7 @@ impl FlutterEngine {
436444if !self . is_platform_thread ( ) {
437445panic ! ( "Not on platform thread" ) ;
438446}
447+
439448unsafe {
440449 flutter_engine_sys:: FlutterEngineSendPlatformMessage (
441450self . engine_ptr ( ) ,
@@ -453,6 +462,7 @@ impl FlutterEngine {
453462if !self . is_platform_thread ( ) {
454463panic ! ( "Not on platform thread" ) ;
455464}
465+
456466unsafe {
457467 flutter_engine_sys:: FlutterEngineSendPlatformMessageResponse (
458468self . engine_ptr ( ) ,