reproduction Flowgraph for https://github.com/gnuradio/gnuradio/issues/7344

default.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

#
# SPDX-License-Identifier: GPL-3.0
#
# GNU Radio Python Flow Graph
# Title: Not titled yet
# GNU Radio version: v3.11.0.0git-747-g778912c3

from PyQt5 import Qt
from gnuradio import qtgui
from gnuradio import gr
from gnuradio.filter import firdes
from gnuradio.fft import window
import sys
import signal
from PyQt5 import Qt
from argparse import ArgumentParser
from gnuradio.eng_arg import eng_float, intx
from gnuradio import eng_notation



class default(gr.top_block, Qt.QWidget):

    def __init__(self):
        gr.top_block.__init__(self, "Not titled yet", catch_exceptions=True)
        Qt.QWidget.__init__(self)
        self.setWindowTitle("Not titled yet")
        qtgui.util.check_set_qss()
        try:
            self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
        except BaseException as exc:
            print(f"Qt GUI: Could not set Icon: {str(exc)}", file=sys.stderr)
        self.top_scroll_layout = Qt.QVBoxLayout()
        self.setLayout(self.top_scroll_layout)
        self.top_scroll = Qt.QScrollArea()
        self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
        self.top_scroll_layout.addWidget(self.top_scroll)
        self.top_scroll.setWidgetResizable(True)
        self.top_widget = Qt.QWidget()
        self.top_scroll.setWidget(self.top_widget)
        self.top_layout = Qt.QVBoxLayout(self.top_widget)
        self.top_grid_layout = Qt.QGridLayout()
        self.top_layout.addLayout(self.top_grid_layout)

        self.settings = Qt.QSettings("GNU Radio", "default")

        try:
            geometry = self.settings.value("geometry")
            if geometry:
                self.restoreGeometry(geometry)
        except BaseException as exc:
            print(f"Qt GUI: Could not restore geometry: {str(exc)}", file=sys.stderr)

        ##################################################
        # Variables
        ##################################################
        self.variable_qtgui_toggle_switch_0 = variable_qtgui_toggle_switch_0 = 0
        self.samp_rate = samp_rate = 32000

        ##################################################
        # Blocks
        ##################################################

        self._variable_qtgui_toggle_switch_0_choices = {'Pressed': 1, 'Released': 0}

        _variable_qtgui_toggle_switch_0_toggle_switch = qtgui.GrToggleSwitch(self.set_variable_qtgui_toggle_switch_0, '', self._variable_qtgui_toggle_switch_0_choices, False, "green", "gray", 4, 50, 1, 1, self, 'value')
        self.variable_qtgui_toggle_switch_0 = _variable_qtgui_toggle_switch_0_toggle_switch

        self.top_layout.addWidget(_variable_qtgui_toggle_switch_0_toggle_switch)



    def closeEvent(self, event):
        self.settings = Qt.QSettings("GNU Radio", "default")
        self.settings.setValue("geometry", self.saveGeometry())
        self.stop()
        self.wait()

        event.accept()

    def get_variable_qtgui_toggle_switch_0(self):
        return self.variable_qtgui_toggle_switch_0

    def set_variable_qtgui_toggle_switch_0(self, variable_qtgui_toggle_switch_0):
        self.variable_qtgui_toggle_switch_0 = variable_qtgui_toggle_switch_0

    def get_samp_rate(self):
        return self.samp_rate

    def set_samp_rate(self, samp_rate):
        self.samp_rate = samp_rate




def main(top_block_cls=default, options=None):

    qapp = Qt.QApplication(sys.argv)

    tb = top_block_cls()

    tb.start()

    tb.show()

    def sig_handler(sig=None, frame=None):
        tb.stop()
        tb.wait()

        Qt.QApplication.quit()

    signal.signal(signal.SIGINT, sig_handler)
    signal.signal(signal.SIGTERM, sig_handler)

    timer = Qt.QTimer()
    timer.start(500)
    timer.timeout.connect(lambda: None)

    qapp.exec_()

if __name__ == '__main__':
    main()

repro7344.grc

options:
  parameters:
    author: ''
    catch_exceptions: 'True'
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: ''
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: qt_gui
    hier_block_src_path: '.:'
    id: default
    max_nouts: '0'
    output_language: python
    placement: (0,0)
    qt_qss_theme: ''
    realtime_scheduling: ''
    run: 'True'
    run_command: '{python} -u {filename}'
    run_options: prompt
    sizing_mode: fixed
    thread_safe_setters: ''
    title: Not titled yet
    window_size: (1000,1000)
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 8]
    rotation: 0
    state: enabled

blocks:
- name: variable_qtgui_toggle_switch_0
  id: variable_qtgui_toggle_switch
  parameters:
    cellalignment: '1'
    comment: ''
    gui_hint: ''
    initPressed: 'False'
    label: ''
    outputmsgname: value
    position: '4'
    pressed: '1'
    released: '0'
    switchOffBackground: gray
    switchOnBackground: green
    type: int
    value: '0'
    verticalalignment: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [31.25, 136.25]
    rotation: 0.0
    state: enabled
connections: []

metadata:
  file_format: 1
  grc_version: v3.11.0.0git-747-g778912c3

repro7344.svg