Handle mouse_leave

src/backend/x11/application.rs

@@ -533,6 +533,12 @@ impl Application {
                     .context("MOTION_NOTIFY - failed to get window")?;
                 w.handle_motion_notify(ev)?;
             }
+            Event::LeaveNotify(ev) => {
+                let w = self
+                    .window(ev.event)
+                    .context("LEAVE_NOTIFY - failed to get window")?;
+                w.handle_leave_notify(ev)?;
+            }
             Event::ClientMessage(ev) => {
                 let w = self
                     .window(ev.window)

src/backend/x11/window.rs

@@ -240,7 +240,8 @@ impl WindowBuilder {
                 | EventMask::BUTTON_PRESS
                 | EventMask::BUTTON_RELEASE
                 | EventMask::POINTER_MOTION
-                | EventMask::FOCUS_CHANGE,
+                | EventMask::FOCUS_CHANGE
+                | EventMask::LEAVE_WINDOW,
         );
         if transparent {
             let colormap = conn.generate_id()?;
@@ -878,6 +879,14 @@ impl Window {
         Ok(())
     }
 
+    pub fn handle_leave_notify(
+        &self,
+        _leave_notify: &xproto::LeaveNotifyEvent,
+    ) -> Result<(), Error> {
+        self.with_handler(|h| h.mouse_leave());
+        Ok(())
+    }
+
     pub fn handle_got_focus(&self) {
         self.with_handler(|h| h.got_focus());
     }