[view.qt] fix: QT crash in case the file downloader thread is still alive

bauh/view/qt/apps_table.py

@@ -605,6 +605,9 @@ class PackagesTable(QTableWidget):
         self.file_downloader.signal_downloaded.connect(self._update_pkg_icon)
         self.file_downloader.start()
 
-    def stop_file_downloader(self) -> None:
+    def stop_file_downloader(self, wait: bool = False) -> None:
         if self.file_downloader:
             self.file_downloader.stop()
+
+            if wait:
+                self.file_downloader.wait()

bauh/view/qt/thread.py

@@ -1127,6 +1127,9 @@ class URLFileDownloader(QThread):
         self._stop = False
 
     def _get(self, url_: str, id_: Optional[object]):
+        if self._stop:
+            return
+
         try:
             res = requests.get(url=url_, timeout=self._request_timeout)
             content = res.content if res.status_code == 200 else None

bauh/view/qt/window.py

@@ -6,7 +6,7 @@ from pathlib import Path
 from typing import List, Type, Set, Tuple, Optional, Dict, Any
 
 from PyQt5.QtCore import QEvent, Qt, pyqtSignal, QRect
-from PyQt5.QtGui import QIcon, QWindowStateChangeEvent, QCursor
+from PyQt5.QtGui import QIcon, QWindowStateChangeEvent, QCursor, QCloseEvent
 from PyQt5.QtWidgets import QWidget, QVBoxLayout, QCheckBox, QHeaderView, QToolBar, \
     QLabel, QPlainTextEdit, QProgressBar, QPushButton, QComboBox, QApplication, QListView, QSizePolicy, \
     QMenu, QHBoxLayout
@@ -1767,3 +1767,7 @@ class ManageWindow(QWidget):
         self.verify_warnings()
         self.types_changed = True
         self.begin_refresh_packages()
+
+    def closeEvent(self, event: QCloseEvent) -> None:
+        # needs to be stopped to avoid a Qt exception/crash
+        self.table_apps.stop_file_downloader(wait=True)