filtering without auto refresh

logFileModel.py

@@ -74,4 +74,15 @@ class LogFileModel:
             return result
 
     def byte_count(self) -> int:
-        return os.stat(self._file).st_size
+        return os.stat(self._file).st_size
+
+    def write_line(self, line: str):
+        with open(self._file, 'a+b') as f:
+            f.write(line.encode("utf8"))
+            if not line.endswith("\n"):
+                f.write("\n".encode("utf8"))
+
+    def truncate(self):
+        with open(self._file, 'a') as f:
+            print("truncating")
+            f.truncate(0)