meshelleva4815 | 2021-05-07 20:58:01 UTC | #1
Hi Martin's, please can you help on a tutorial on how to use QSettings. am currently having issues in using the module or library 😀😀 in my current project, I have so many options that I need the settings to enable or disable, I tried the documentation but it's really not helping. I just need an in-depth or even if it's a demo on how to use the settings. I count much on your respond soon boss. how is your baby..? good morning
mike2750 | 2021-05-07 20:58:10 UTC | #2
yeah this is a very confusing thing once i learned paid off nicely. I'm dumping some examples of stuff to give you an idea of how i used it with related helpful links.
Here's a test script to set and view settings.
import sys import os from PyQt5 import QtCore settings = QtCore.QSettings('WizardAssistant', 'WizardAssistantDesktop') print(settings.fileName()) settings.setValue('wizardwebsshport', 8889) #settings.setValue('theme_selection', 'Dark') #settings.setValue('license', 'XXXXX-XXXX-XXXXX-XXXX') #settings.remove('license') keys = settings.allKeys() print(keys)
Here's how you can define and load settings from Qsettings in app
settings = QtCore.QSettings('WizardAssistant', 'WizardAssistantDesktop') config_data_dir = Path("WizardAssistant/WizardAssistantDesktop") license_file = QStandardPaths.writableLocation( QStandardPaths.AppConfigLocation) / config_data_dir / 'wizardassistant_license.skm' # Restore settings if exist or set a default if settings.contains("theme_selection"): # there is the key in QSettings print('Checking for theme preference in config') theme_selection = settings.value('theme_selection') print('Found theme_selection in config:' + theme_selection) else: print('theme_selection not found in config. Using default Darkmode') settings.setValue('theme_selection', 'Dark') pass if settings.contains("panel_name"): # there is the key in QSettings print('Checking for default panel_name in config') panel_name = settings.value('panel_name') print('Found panel_name in config:' + str(panel_name)) else: print('panel_name not found in config. Using default: Cyberpanel') settings.setValue('panel_name', 'cyberpanel') panel_name = str(settings.value('panel_name')) pass class AppContext(ApplicationContext): def run(self): global version, current_version, current_release_notes_url, license_type, trial_license, lite_license, premium_license, professional_license, corporate_license, license_expiration, license_key_is_valid, license_key, license_string, current_release_url version = self.build_settings['version'] QApplication.setApplicationName("WizardAssistantDesktop") QApplication.setOrganizationName("WizardAssistant") QApplication.setOrganizationDomain("wizardassistant.com") # Splash startup screen initialization self.splash = QSplashScreen( QPixmap(os.path.join(os.path.abspath(os.path.dirname(sys.argv)), 'images', 'chevron_logo.png'))) self.splash.show() self.settings = QSettings() print(self.settings.fileName()) def load_license_from_config(): global license_string if self.settings.contains("license"): # there is the key in QSettings print('Checking for license in config') license_string = self.settings.value('license') print('Found license in config:' + license_string) else: print('License not found in config') pass
Resource links I found helpful when learning and saved. https://doc.qt.io/qtforpython/PySide2/QtCore/QSettings.html#basic-usage https://doc.qt.io/qtforpython/overviews/qtwidgets-mainwindows-application-example.html#application-example https://doc.qt.io/qtforpython/PySide2/QtCore/QSettings.html#PySide2.QtCore.PySide2.QtCore.QSettings.setPath https://doc.qt.io/qtforpython/PySide2/QtCore/QSettings.html#PySide2.QtCore.PySide2.QtCore.QSettings.isWritable https://www.riverbankcomputing.com/static/Docs/PyQt4/qsettings.html https://www.riverbankcomputing.com/static/Docs/PyQt5/pyqt_qsettings.html https://medium.com/manash-en-blog/quick-qt-1-saving-settings-of-qt-applications-using-qsettings-a4ef4f0033e3 https://stackoverflow.com/questions/53108577/check-if-qsettings-is-using-the-default-value https://doc.qt.io/qtforpython/PySide2/QtCore/QSettings.html#PySide2.QtCore.PySide2.QtCore.QSettings.allKeys https://stackoverflow.com/questions/58904533/restoring-qcheckbox-with-qsettings
On that same path you will probably want to know where these Qsettings are stored and control that possibly so ill leave this related information here to hopefully save you and others time.
Qstandardpaths test file shows you paths of where things would go on that OS when run.
from PyQt5 import QtCore from PyQt5.QtCore import QStandardPaths # https://doc.qt.io/qtforpython/PySide2/QtCore/QStandardPaths.html#more print(str(QStandardPaths.writableLocation(QStandardPaths.AppConfigLocation))) print(str(QStandardPaths.writableLocation(QStandardPaths.ConfigLocation))) print(str(QStandardPaths.writableLocation(QStandardPaths.AppDataLocation))) print(str(QStandardPaths.writableLocation(QStandardPaths.ConfigLocation))) std_paths_list_names = ['QStandardPaths.DesktopLocation', 'QStandardPaths.DocumentsLocation', 'QStandardPaths.FontsLocation', 'QStandardPaths.ApplicationsLocation', 'QStandardPaths.MusicLocation', 'QStandardPaths.MoviesLocation', 'QStandardPaths.PicturesLocation', 'QStandardPaths.TempLocation', 'QStandardPaths.HomeLocation', 'QStandardPaths.DataLocation', 'QStandardPaths.CacheLocation', 'QStandardPaths.GenericCacheLocation', 'QStandardPaths.GenericDataLocation', 'QStandardPaths.RuntimeLocation', 'QStandardPaths.ConfigLocation', 'QStandardPaths.DownloadLocation', 'QStandardPaths.GenericConfigLocation', 'QStandardPaths.AppDataLocation', 'QStandardPaths.AppLocalDataLocation', 'QStandardPaths.AppConfigLocation'] std_paths_list = [QStandardPaths.DesktopLocation, QStandardPaths.DocumentsLocation, QStandardPaths.FontsLocation, QStandardPaths.ApplicationsLocation, QStandardPaths.MusicLocation, QStandardPaths.MoviesLocation, QStandardPaths.PicturesLocation, QStandardPaths.TempLocation, QStandardPaths.HomeLocation, QStandardPaths.DataLocation, QStandardPaths.CacheLocation, QStandardPaths.GenericCacheLocation, QStandardPaths.GenericDataLocation, QStandardPaths.RuntimeLocation, QStandardPaths.ConfigLocation, QStandardPaths.DownloadLocation, QStandardPaths.GenericConfigLocation, QStandardPaths.AppDataLocation, QStandardPaths.AppLocalDataLocation, QStandardPaths.AppConfigLocation] for path in std_paths_list: print(str(path)) print(str(QStandardPaths.writableLocation(path))) print(str(QStandardPaths.writableLocation(QStandardPaths.AppConfigLocation)))
Related resources: https://doc.qt.io/qtforpython/PySide2/QtCore/QStandardPaths.html#more https://www.ics.com/blog/whats-new-qt-5-qstandardpaths https://community.kde.org/Frameworks/Porting_Notes/KStandardDirs https://contingencycoder.wordpress.com/2013/07/07/quick-tip-qt-5-standard-paths/
meshelleva4815 | 2020-10-10 07:23:53 UTC | #3
😱😱I can't thank you enough Mike. this far more than I was expecting. I really appreciate. good days ahead I hope and pray...thank you
mike2750 | 2020-10-10 09:20:46 UTC | #4
My pleasure. Always happy to help. some of this stuff is a real pita due to limited examples of real usage so involves a lot of trial and error.
I love to share and save others from the same frustration I experienced. :)
I definitely think both of these topics would make for nice tutorial ideas.
The Qsettings thing had i learned about it sooner would have saved me a ton of time. I was having trouble sharing what port a service was listening on between two different processes in the app one being a service/daemon and had i know i could have used Qsettings to share the current port atomicly without dealing with temporary files reading/writing that would have saved me a week of my time off being frustrated with why i was not able to read/write to installation path from frozen/installed app lol.
There is so many cool ways to use that and my examples are pretty basic. I don't know fully what all settings I'm going to have but i will probably build them into a dictionary or list and loop through loading/restoring them vs the one by one approach ive been doing as i add new ones.