Client/controller/MainWindowController.py

class MainWindowController:
    def __init__(self, parser, app_controller):
        self.parser = parser
        self.app_controller = app_controller
        self.app_controller.set_window_controller(self)
        self.window = None

    def on_quit(self):
        self.app_controller.on_quit()
        pass

    def on_signin(self, host, port, login, passw, tls):
        print("[MainWindowController::on_signin] calling AppController::on_sign")
        self.app_controller.on_sign(host, port, login, passw, tls)

    def on_signup(self, host, port, login, passw, tls):
        self.app_controller.on_sign(host, port, login, passw, tls, True)

    def on_refreshlist(self):
        self.app_controller.on_filelist()

    def on_fileupload(self, filepath):
        self.app_controller.on_fileupload(filepath)

    def on_filedownload(self, filename, savepath):
        self.app_controller.on_filedownload(filename, savepath)

    def on_filedelete(self, filename):
        self.app_controller.on_filedelete(filename)

    def show_message(self, message, is_error):
        self.window.show_message(message, is_error)

    def switch_connected_mode(self):
        self.window.connected_mode()

    def register_window(self, window):
        self.window = window

    def clear_all_file_on_window(self):
        self.window.remove_all_from_treeview()

    def add_file_on_window(self, fileinfo):
        self.window.add_file_in_treeview(fileinfo)