Fix some parameter issues and replace tkinter messagebox with Qt-based messagebox.

app.py

@@ -151,7 +151,7 @@ class Launcher(QApplication, LauncherObject):
         full_path = self.styles_path / qss_relative_path
         if not full_path.exists():
             messagebox.error(
-                self.main_window,
+                None,
                 "Resource Error",
                 "Missing stylesheet file: {}".format(full_path),
             )

core_lib/qt/messagebox.py

@@ -2,7 +2,7 @@ from PySide6.QtWidgets import QMessageBox, QMainWindow, QWidget, QDialog, QVBoxL
     QDialogButtonBox, QSizePolicy
 
 
-def create_messagebox(parent: QWidget, title: str, message: str,
+def create_messagebox(parent: QWidget | None, title: str, message: str,
                       icon: QMessageBox.Icon = QMessageBox.Icon.Information,
                       button: QMessageBox.StandardButton = QMessageBox.StandardButton.Ok) -> QMessageBox:
     msg = QMessageBox(parent)
@@ -13,7 +13,7 @@ def create_messagebox(parent: QWidget, title: str, message: str,
     return msg
 
 
-def error(parent: QWidget, title: str, message: str,
+def error(parent: QWidget | None, title: str, message: str,
           button: QMessageBox.StandardButton = QMessageBox.StandardButton.Ok) -> None:
     create_messagebox(
         parent,
@@ -24,7 +24,7 @@ def error(parent: QWidget, title: str, message: str,
     ).exec()
 
 
-def info(parent: QWidget, title: str, message: str,
+def info(parent: QWidget | None, title: str, message: str,
          button: QMessageBox.StandardButton = QMessageBox.StandardButton.Ok) -> None:
     create_messagebox(
         parent,
@@ -35,7 +35,7 @@ def info(parent: QWidget, title: str, message: str,
     ).exec()
 
 
-def warning(parent: QWidget, title: str, message: str,
+def warning(parent: QWidget | None, title: str, message: str,
             button: QMessageBox.StandardButton = QMessageBox.StandardButton.Ok) -> None:
     create_messagebox(
         parent,
@@ -47,7 +47,7 @@ def warning(parent: QWidget, title: str, message: str,
 
 
 def error_with_plain_text(
-    parent: QWidget,
+    parent: QWidget | None,
     title: str,
     message: str,
     content: str,
@@ -78,7 +78,7 @@ def error_with_plain_text(
     dialog.exec()
 
 
-def ask_yes_no_with_plain_text(parent: QWidget, title: str, message: str, content: str):
+def ask_yes_no_with_plain_text(parent: QWidget | None, title: str, message: str, content: str):
     dialog = QDialog(parent)
     dialog.setWindowTitle(title)
     dialog.resize(720, 420)

main.py

@@ -16,11 +16,13 @@ import os
 import sys
 import argparse
 import logging
+
+from PySide6.QtWidgets import QApplication, QMainWindow
+
 from app import Launcher
-from tkinter import messagebox
 
 from core_lib.log.default import DEFAULT_FORMAT, DEFAULT_DATE_FORMAT, get_colorful_handler
-
+from core_lib.qt import messagebox
 
 def main():
     root_logger = logging.getLogger()
@@ -43,9 +45,13 @@ def main():
 
     # check workdir
     if not os.path.exists(args.work_dir) or not os.path.isdir(args.work_dir):
-        messagebox.showerror("Error", f"Specified work directory \"{args.work_dir}\" does not exist or"
+        app = QApplication(sys.argv)
+        app.setApplicationName("Launcher Bootstrapper")
+        window = QMainWindow()
+        messagebox.error(window, "Error", f"Specified work directory \"{args.work_dir}\" does not exist or"
                                       " is not a directory.")
         logger.error("Work directory '%s' does not exist. Exiting..." % args.work_dir)
+        app.exit()
         sys.exit(-1)
 
     if os.getcwd() != args.work_dir: