def __init__(self, inMsg=' Loading...', inMaxStep=1):
        """
        """
        # Save reference to the QGIS interface
        # initialize progressBar
        # QApplication.processEvents() # Help to keep UI alive
        self.iface = iface

        widget = iface.messageBar().createMessage('Please wait  ', inMsg)

        prgBar = QProgressBar()
        self.prgBar = prgBar

        widget.layout().addWidget(self.prgBar)
        iface.messageBar().pushWidget(widget)
        QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))

        # if Max 0 and value 0, no progressBar, only cursor loading
        # default is set to 0
        prgBar.setValue(1)
        # set Maximum for progressBar
        prgBar.setMaximum(inMaxStep) 

def handle_signal_loaded(self, protocol):
        self.setCursor(Qt.WaitCursor)
        self.ui.cbShowDataBitsOnly.setEnabled(True)
        self.ui.chkBoxLockSIV.setEnabled(True)
        self.ui.btnAutoDetect.setEnabled(True)
        self.protocol = protocol

        # Apply bit length of original signal to current modulator
        self.ui.spinBoxSamplesPerSymbol.setValue(self.ui.gVOriginalSignal.signal.samples_per_symbol)

        # https://github.com/jopohl/urh/issues/130
        self.ui.gVModulated.show_full_scene(reinitialize=True)
        self.ui.gVCarrier.show_full_scene(reinitialize=True)
        self.ui.gVData.show_full_scene(reinitialize=True)

        self.unsetCursor() 

def export_demodulated(self):
        try:
            initial_name = self.signal.name + "-demodulated.complex"
        except Exception as e:
            logger.exception(e)
            initial_name = "demodulated.complex"

        filename = FileOperator.get_save_file_name(initial_name)
        if filename:
            try:
                self.setCursor(Qt.WaitCursor)
                data = self.signal.qad
                if filename.endswith(".wav"):
                    data = self.signal.qad.astype(np.float32)
                    data /= np.max(np.abs(data))
                FileOperator.save_data(IQArray(data, skip_conversion=True), filename, self.signal.sample_rate,
                                       num_channels=1)
                self.unsetCursor()
            except Exception as e:
                QMessageBox.critical(self, self.tr("Error exporting demodulated data"), e.args[0]) 

def draw_spectrogram(self, show_full_scene=False, force_redraw=False):
        self.setCursor(Qt.WaitCursor)
        window_size = 2 ** self.ui.sliderFFTWindowSize.value()
        data_min, data_max = self.ui.sliderSpectrogramMin.value(), self.ui.sliderSpectrogramMax.value()

        redraw_needed = self.ui.gvSpectrogram.scene_manager.set_parameters(self.signal.iq_array.data,
                                                                           window_size=window_size,
                                                                           data_min=data_min, data_max=data_max)
        self.ui.gvSpectrogram.scene_manager.update_scene_rect()

        if show_full_scene:
            self.ui.gvSpectrogram.show_full_scene()

        if redraw_needed or force_redraw:
            self.ui.gvSpectrogram.scene_manager.show_full_scene()
            self.ui.gvSpectrogram.show_full_scene()

        self.on_slider_y_scale_value_changed()

        self.__set_samples_in_view()
        self.unsetCursor() 

def on_cb_signal_view_index_changed(self):
        self.setCursor(Qt.WaitCursor)

        self.__set_spectrogram_adjust_widgets_visibility()

        if self.ui.cbSignalView.currentText().lower() == "spectrogram":
            self.ui.stackedWidget.setCurrentWidget(self.ui.pageSpectrogram)
            self.draw_spectrogram(show_full_scene=True)
            self.__set_selected_bandwidth()
            self.ui.labelRSSI.hide()
        else:
            self.ui.stackedWidget.setCurrentWidget(self.ui.pageSignal)
            self.ui.gvSignal.scene_type = self.ui.cbSignalView.currentIndex()
            self.scene_manager.mod_type = self.signal.modulation_type
            self.ui.gvSignal.redraw_view(reinitialize=True)
            self.ui.labelRSSI.show()

            self.ui.gvSignal.auto_fit_view()
            self.ui.gvSignal.refresh_selection_area()
            qApp.processEvents()
            self.on_slider_y_scale_value_changed()  # apply YScale to new view
            self.__set_samples_in_view()
            self.__set_duration()

        self.unsetCursor() 

def contextMenuEvent(self, event: QContextMenuEvent):
        if self.signal is None:
            return

        menu = QMenu()
        apply_to_all_action = menu.addAction(self.tr("Apply values (BitLen, 0/1-Threshold, Tolerance) to all signals"))
        menu.addSeparator()
        auto_detect_action = menu.addAction(self.tr("Auto-Detect signal parameters"))
        action = menu.exec_(self.mapToGlobal(event.pos()))
        if action == apply_to_all_action:
            self.setCursor(Qt.WaitCursor)
            self.apply_to_all_clicked.emit(self.signal)
            self.unsetCursor()
        elif action == auto_detect_action:
            self.setCursor(Qt.WaitCursor)
            self.signal.auto_detect(detect_modulation=False, detect_noise=False)
            self.unsetCursor() 

def on_export_fta_wanted(self):
        try:
            initial_name = self.signal.name + "-spectrogram.ft"
        except Exception as e:
            logger.exception(e)
            initial_name = "spectrogram.ft"

        filename = FileOperator.get_save_file_name(initial_name, caption="Export spectrogram")
        if not filename:
            return
        QApplication.setOverrideCursor(Qt.WaitCursor)
        try:
            self.ui.gvSpectrogram.scene_manager.spectrogram.export_to_fta(sample_rate=self.signal.sample_rate,
                                                                          filename=filename,
                                                                          include_amplitude=filename.endswith(".fta"))
        except Exception as e:
            Errors.exception(e)
        finally:
            QApplication.restoreOverrideCursor() 

def show_open_dialog(self, directory=False):
        dialog = FileOperator.get_open_dialog(directory_mode=directory, parent=self, name_filter="full")
        if dialog.exec_():
            try:
                file_names = dialog.selectedFiles()
                folders = [folder for folder in file_names if os.path.isdir(folder)]

                if len(folders) > 0:
                    folder = folders[0]
                    for f in self.signal_tab_controller.signal_frames:
                        self.close_signal_frame(f)

                    self.project_manager.set_project_folder(folder)
                else:
                    self.setCursor(Qt.WaitCursor)
                    file_names = FileOperator.uncompress_archives(file_names, QDir.tempPath())
                    self.add_files(file_names)
                    self.unsetCursor()
            except Exception as e:
                Errors.exception(e)
                self.unsetCursor() 

def read_opened_filenames(self):
        if self.project_file is not None:
            tree = ET.parse(self.project_file)
            root = tree.getroot()
            file_names = []

            for file_tag in root.findall("open_file"):
                pos = int(file_tag.attrib["position"])
                filename = file_tag.attrib["name"]
                if not os.path.isfile(filename):
                    filename = os.path.normpath(os.path.join(self.project_path, filename))
                file_names.insert(pos, filename)

            QApplication.setOverrideCursor(Qt.WaitCursor)
            file_names = FileOperator.uncompress_archives(file_names, QDir.tempPath())
            QApplication.restoreOverrideCursor()
            return file_names
        return [] 

def main(self):
		while 1:
			to_new_word = False

			try:
				word, globalX = config.queue_to_translate.get(False)
			except:
				time.sleep(config.update_time)
				continue

			# changing cursor to hourglass during translation
			QApplication.setOverrideCursor(Qt.WaitCursor)

			threads = []
			for translation_function_name in config.translation_function_names:
				threads.append(threading.Thread(target = globals()[translation_function_name], args = (word,)))
			for x in threads:
				x.start()
			while any(thread.is_alive() for thread in threads):
				if config.queue_to_translate.qsize():
					to_new_word = True
					break
				time.sleep(config.update_time)

			QApplication.restoreOverrideCursor()

			if to_new_word:
				continue

			if config.block_popup:
				continue

			self.get_translations.emit(word, globalX, False)

# drawing layer
# because can't calculate outline with precision 

def add_uri_audio_media_cue():
        """Add audio MediaCue(s) form user-selected files"""

        if get_backend() is None:
            QMessageBox.critical(MainWindow(), 'Error', 'Backend not loaded')
            return

        # Default path to system "music" folder
        path = QStandardPaths.writableLocation(QStandardPaths.MusicLocation)

        # Get the backend extensions and create a filter for the Qt file-dialog
        extensions = get_backend().supported_extensions()
        filters = qfile_filters(extensions, anyfile=False)
        # Display a file-dialog for the user to choose the media-files
        files, _ = QFileDialog.getOpenFileNames(MainWindow(),
                                                translate('MediaCueMenus',
                                                          'Select media files'),
                                                path, filters)

        QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))

        # Create media cues, and add them to the Application cue_model
        for file in files:
            cue = CueFactory.create_cue('URIAudioCue', uri='file://' + file)
            # Use the filename without extension as cue name
            cue.name = os.path.splitext(os.path.basename(file))[0]
            Application().cue_model.add(cue)

        QApplication.restoreOverrideCursor() 

def showKeyframes(self):
        qApp.setOverrideCursor(Qt.WaitCursor)
        keyframes = self.parent.videoService.getKeyframes(self.media, formatted_time=True)
        kframes = KeyframesDialog(keyframes, self)
        kframes.show() 

def setWaitCursor(self):
        self.setCursor(Qt.WaitCursor) 

def save_as(self, filename: str):
        QApplication.instance().setOverrideCursor(Qt.WaitCursor)
        self.filename = filename
        FileOperator.save_signal(self)
        self.name = os.path.splitext(os.path.basename(filename))[0]
        self.changed = False
        QApplication.instance().restoreOverrideCursor() 

def on_btn_fuzzing_clicked(self):
        fuz_mode = "Successive"
        if self.ui.rbConcurrent.isChecked():
            fuz_mode = "Concurrent"
        elif self.ui.rBExhaustive.isChecked():
            fuz_mode = "Exhaustive"

        self.setCursor(Qt.WaitCursor)
        fuzz_action = Fuzz(self.table_model.protocol, fuz_mode)
        self.table_model.undo_stack.push(fuzz_action)
        for row in fuzz_action.added_message_indices:
            self.table_model.update_checksums_for_row(row)
        self.unsetCursor()
        self.ui.tableMessages.setFocus() 

def on_view_type_changed(self):
        self.setCursor(Qt.WaitCursor)
        self.table_model.proto_view = self.ui.cbViewType.currentIndex()
        self.ui.tableMessages.resize_columns()
        self.unsetCursor() 

def on_fuzzing_finished(self):
        self.ui.stackedWidgetFuzzing.setCurrentWidget(self.ui.pageFuzzingUI)
        # Calculate Checksums for Fuzzed Messages
        self.setCursor(Qt.WaitCursor)

        self.unsetCursor() 

def set_signal(self):
        indx = self.ui.combobox_signals.currentIndex()
        if indx != 0:
            self.ui.inpt.setReadOnly(True)
        else:
            self.ui.inpt.setReadOnly(False)
            self.ui.inpt.setText("10010110")
            self.decoder_update()
            return

        self.setCursor(Qt.WaitCursor)

        signal = self.signals[indx - 1]
        pa = ProtocolAnalyzer(signal)
        pa.get_protocol_from_signal()
        self.ui.inpt.setText("".join(pa.plain_bits_str))
        self.ui.inpt.setCursorPosition(0)

        if signal is not None and pa.messages:
            last_message = pa.messages[-1]
            lookup = {i: msg.bit_sample_pos for i, msg in enumerate(pa.messages)}

            plot_data = signal.qad[lookup[0][0]:lookup[pa.num_messages - 1][len(last_message) - 1]]
            self.ui.graphicsView_signal.plot_data(plot_data)

        self.ui.graphicsView_signal.centerOn(0, 0)
        self.unsetCursor() 

def on_set_noise_in_graphic_view_clicked(self):
        self.setCursor(Qt.WaitCursor)
        start = self.ui.gvSignal.selection_area.x
        end = start + self.ui.gvSignal.selection_area.width

        new_thresh = self.signal.calc_relative_noise_threshold_from_range(start, end)
        self.ui.spinBoxNoiseTreshold.setValue(new_thresh)
        self.ui.spinBoxNoiseTreshold.editingFinished.emit()
        self.unsetCursor() 

def on_bandpass_filter_triggered(self, f_low: float, f_high: float):
        self.filter_abort_wanted = False

        QApplication.instance().setOverrideCursor(Qt.WaitCursor)
        filter_bw = Filter.read_configured_filter_bw()
        filtered = Array("f", 2 * self.signal.num_samples)
        p = Process(target=perform_filter,
                    args=(filtered, self.signal.iq_array.as_complex64(), f_low, f_high, filter_bw))
        p.daemon = True
        p.start()

        while p.is_alive():
            QApplication.instance().processEvents()

            if self.filter_abort_wanted:
                p.terminate()
                p.join()
                QApplication.instance().restoreOverrideCursor()
                return

            time.sleep(0.1)

        filtered = np.frombuffer(filtered.get_obj(), dtype=np.complex64)
        signal = self.signal.create_new(new_data=filtered.astype(np.complex64))
        signal.name = self.signal.name + " filtered with f_low={0:.4n} f_high={1:.4n} bw={2:.4n}".format(f_low, f_high,
                                                                                                         filter_bw)
        self.signal_created.emit(signal)
        QApplication.instance().restoreOverrideCursor() 

def add_signal(self, signal, group_id=0, index=-1):
        self.setCursor(Qt.WaitCursor)
        pa = ProtocolAnalyzer(signal)
        sig_frame = self.signal_tab_controller.add_signal_frame(pa, index=index)
        pa = self.compare_frame_controller.add_protocol(pa, group_id)

        signal.blockSignals(True)
        has_entry = self.project_manager.read_project_file_for_signal(signal)

        if self.ui.actionAuto_detect_new_signals.isChecked() and not has_entry and not signal.changed:
            sig_frame.ui.stackedWidget.setCurrentWidget(sig_frame.ui.pageLoading)
            qApp.processEvents()
            if not signal.already_demodulated:
                signal.auto_detect(detect_modulation=True, detect_noise=False)
            sig_frame.ui.stackedWidget.setCurrentWidget(sig_frame.ui.pageSignal)

        signal.blockSignals(False)

        self.signal_protocol_dict[sig_frame] = pa

        sig_frame.refresh_signal(draw_full_signal=True)
        sig_frame.refresh_signal_information(block=True)

        qApp.processEvents()
        sig_frame.show_protocol(refresh=True)

        if self.project_manager.read_participants_for_signal(signal, pa.messages):
            sig_frame.ui.gvSignal.redraw_view()

        sig_frame.ui.gvSignal.auto_fit_view()
        self.set_frame_numbers()

        self.compare_frame_controller.filter_search_results()
        self.refresh_main_menu()
        self.unsetCursor() 

def on_open_recent_action_triggered(self):
        action = self.sender()
        try:
            if os.path.isdir(action.data()):
                self.project_manager.set_project_folder(action.data())
            elif os.path.isfile(action.data()):
                self.setCursor(Qt.WaitCursor)
                self.add_files(FileOperator.uncompress_archives([action.data()], QDir.tempPath()))
                self.unsetCursor()
        except Exception as e:
            Errors.exception(e)
            self.unsetCursor() 

def __add_urls_to_group(self, file_urls, group_id=0):
        local_files = [file_url.toLocalFile() for file_url in file_urls if file_url.isLocalFile()]
        if len(local_files) > 0:
            self.setCursor(Qt.WaitCursor)
            self.add_files(FileOperator.uncompress_archives(local_files, QDir.tempPath()), group_id=group_id)
            self.unsetCursor() 

def resize_me(self):
        qApp.setOverrideCursor(Qt.WaitCursor)
        w = QFontMetrics(self.font()).widthChar("0") + 2
        for i in range(10):
            self.setColumnWidth(i, 3 * w)
        for i in range(10, self.model().col_count):
            self.setColumnWidth(i, w * (len(str(i + 1)) + 1))
        qApp.restoreOverrideCursor() 

def on_de_bruijn_action_triggered(self):
        self.setCursor(Qt.WaitCursor)

        row = self.rowAt(self.context_menu_pos.y())
        _, _, start, end = self.selection_range()
        self.model().generate_de_bruijn(row, start, end)

        self.unsetCursor() 

def load_experiment_clicked(self):
        experiment_uri = self.experiment_uri_line_edit.text()
        Log.log_info("Loading experiment at {}".format(experiment_uri))
        QtWidgets.QApplication.setOverrideCursor(Qt.WaitCursor)
        try:
            msg = load_json_config(experiment_uri, ExperimentConfigMsg())
        except (NotReadableError, ProtobufParseException) as e:
            reply = QMessageBox.warning(self.iface.mainWindow(), 'Error',
                                        'Unable to read experiment file. See log more details.', QMessageBox.Ok)
            Log.log_warning('Unable to read experiment file: {}'.format(experiment_uri))
            Log.log_exception(e)
            return
        finally:
            QtWidgets.QApplication.restoreOverrideCursor()

        experiment = rv.ExperimentConfig.from_proto(msg)
        self.experiment = experiment
        ds = experiment.dataset

        self.train_scene_list.clear()
        for scene in ds.train_scenes:
            item = QtWidgets.QListWidgetItem(scene.id, self.train_scene_list)
            item.setFlags(QtCore.Qt.ItemIsUserCheckable |
                          QtCore.Qt.ItemIsEnabled)
            item.setCheckState(QtCore.Qt.Checked)
            self.train_scene_list.addItem(item)

        self.validation_scene_list.clear()
        for scene in ds.validation_scenes:
            item = QtWidgets.QListWidgetItem(scene.id, self.validation_scene_list)
            item.setFlags(QtCore.Qt.ItemIsUserCheckable |
                          QtCore.Qt.ItemIsEnabled)
            item.setCheckState(QtCore.Qt.Checked)
            self.validation_scene_list.addItem(item)

        self.test_scene_list.clear()
        for scene in ds.test_scenes:
            item = QtWidgets.QListWidgetItem(scene.id, self.test_scene_list)
            item.setFlags(QtCore.Qt.ItemIsUserCheckable |
                          QtCore.Qt.ItemIsEnabled)
            item.setCheckState(QtCore.Qt.Checked)
            self.test_scene_list.addItem(item) 

def onScanClicked(self, pressed):
        if self.btnScan.isChecked():
            # Scanning is on.  Turn red to indicate click would stop
            if self.comboScanType.currentText() == 'Promiscuous Discovery':
                ubertooth = True
                
                if not self.usingRemoteAgent:
                    if not self.mainWin.hasUbertooth:
                        self.btnScan.setChecked(False)
                        return
                else:
                    if not self.mainWin.hasRemoteUbertooth:
                        self.btnScan.setChecked(False)
                        return
            else:
                ubertooth = False
                
            self.btnScan.setStyleSheet("background-color: rgba(255,0,0,255); border: none;")
            self.btnScan.setText('&Stop scanning')
            self.comboScanType.setEnabled(False)
            
            if not self.mainWin.remoteAgentUp:
                self.scanPromiscuous = ubertooth
                self.bluetooth.startDiscovery(ubertooth)
            else:
                self.setCursor(Qt.WaitCursor)
                errcode, errmsg = startRemoteBluetoothDiscoveryScan(self.remoteAgentIP, self.remoteAgentPort, ubertooth)
                self.setCursor(Qt.ArrowCursor)

                if errcode != 0:
                    QMessageBox.question(self, 'Error',"Could not start remote scan: " + errmsg, QMessageBox.Ok)
                    self.btnScan.setChecked(False)
                    self.btnScan.setStyleSheet("background-color: rgba(2,128,192,255); border: none;")
                    self.btnScan.setText('&Scan')
                    self.comboScanType.setEnabled(True)
                    return
                    
            self.btTimer.start(self.btTimerTimeout)
        else:
            self.btTimer.stop()
            
            self.btnScan.setStyleSheet("background-color: rgba(2,128,192,255); border: none;")
            self.btnScan.setText('&Scan')
            self.comboScanType.setEnabled(True)
            self.setCursor(Qt.WaitCursor)
            if not self.mainWin.remoteAgentUp:
                self.bluetooth.stopDiscovery()
            else:
                errcode, errmsg = stopRemoteBluetoothDiscoveryScan(self.remoteAgentIP, self.remoteAgentPort)
            self.setCursor(Qt.ArrowCursor)