Add blocking dispatch_thread_events function

native-windows-gui/src/lib.rs

@@ -24,7 +24,9 @@ pub use common_types::*;
 
 pub(crate) mod win32;
 pub use win32::{
- dispatch_thread_events, dispatch_thread_events_with_callback, stop_thread_dispatch, enable_visual_styles, init_common_controls, 
+ dispatch_thread_events, dispatch_thread_events_with_callback,
+ dispatch_thread_events_blocking_with_callback,
+ stop_thread_dispatch, enable_visual_styles, init_common_controls,
  window::{
      EventHandler, RawEventHandler,
      full_bind_event_handler, bind_event_handler, unbind_event_handler,

native-windows-gui/src/win32/mod.rs

@@ -81,6 +81,27 @@ pub fn dispatch_thread_events_with_callback<F>(mut cb: F)
     }
 }
 
+/**
+    Dispatch system events in the current thread AND execute a callback after each message received.
+*/
+pub fn dispatch_thread_events_blocking_with_callback<F>(mut cb: F)
+    where F: FnMut() -> () + 'static
+{
+    use winapi::um::winuser::GetMessageW;
+    use winapi::um::winuser::MSG;
+
+    unsafe {
+        let mut msg: MSG = mem::zeroed();
+        while GetMessageW(&mut msg, ptr::null_mut(), 0, 0) != 0 {
+            if IsDialogMessageW(GetAncestor(msg.hwnd, GA_ROOT), &mut msg) == 0 {
+                TranslateMessage(&msg);
+                DispatchMessageW(&msg);
+            }
+            cb();
+        }
+    }
+}
+
 /**
     Break the events loop running on the current thread
 */