Implement raw_window_handle::HasRawWindowHandle for Window type (#1105)

* Implement raw_window_handle::HasRawWindowHandle for Window type

* Format

* Address compilation issues

* Fix Linux build hopefully

* Fix iOS build

src/platform_impl/windows/window.rs

@@ -1,6 +1,7 @@
 #![cfg(target_os = "windows")]
 
 use parking_lot::Mutex;
+use raw_window_handle::{windows::WindowsHandle, RawWindowHandle};
 use std::{
     cell::Cell,
     ffi::OsStr,
@@ -339,6 +340,15 @@ impl Window {
         self.window.0
     }
 
+    #[inline]
+    pub fn raw_window_handle(&self) -> RawWindowHandle {
+        let handle = WindowsHandle {
+            hwnd: self.window.0 as *mut _,
+            ..WindowsHandle::empty()
+        };
+        RawWindowHandle::Windows(handle)
+    }
+
     #[inline]
     pub fn set_cursor_icon(&self, cursor: CursorIcon) {
         self.window_state.lock().mouse.cursor = cursor;