run.py

# -*- coding: utf-8 -*-
import sys
from qbcompiler.gui.main_window import QBCompilerApp

def main():
    app = QBCompilerApp()
    
    # Safe close protocol
    def on_closing():
        if app.compiler.is_building:
            from tkinter import messagebox
            confirm = messagebox.askyesno(
                "Build in Progress",
                "A build is currently running in the background. Stop compilation and exit?"
            )
            if not confirm:
                return
            app.compiler.cancel_build()
        app.destroy()
        
    app.protocol("WM_DELETE_WINDOW", on_closing)
    app.mainloop()

if __name__ == "__main__":
    main()