Simplify stuff a bit

pytec/pytec/aioclient.py

@@ -23,7 +23,7 @@ class Client:
         return self._connecting_task is not None
 
     def is_connected(self):
-        return self._reader is not None
+        return self._writer is not None
 
     async def disconnect(self):
         if self._connecting_task is not None:
@@ -31,6 +31,10 @@ class Client:
             self._connecting_task = None
             return
 
+        if self._writer is None:
+            return
+
+        # Reader needn't be closed
         self._writer.close()
         await self._writer.wait_closed()
         self._reader = None

pytec/tec_qt.py

@@ -156,9 +156,7 @@ class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
 
     @asyncClose
     async def closeEvent(self, event):
-        if self.client_watcher.is_watching():
         self.client_watcher.stop_watching()
-        if self.tec_client.is_connecting() or self.tec_client.is_connected():
         await self.tec_client.disconnect()
 
     @asyncSlot()