import sys
import time
from PyQt6.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QPushButton, QLabel
from PyQt6.QtCore import QObject, pyqtSignal, Qt

class ThreadSafetyTool(QObject):
    """Marshal function calls to the main thread."""
    _signal = pyqtSignal(object, tuple, dict)
    
    def __init__(self):
        super().__init__()
        self._signal.connect(self._execute, Qt.ConnectionType.QueuedConnection)
    
    def _execute(self, func, args, kwargs):
        func(*args, **kwargs)
    
    def __call__(self, func):
        """Decorator that forces a function to run on the main thread."""
        def wrapper(*args, **kwargs):
            self._signal.emit(func, args, kwargs)
        return wrapper