How to remember last geometry of PyQt application?

Question

I am using PyQt5 5.5.1 (64-bit) with Python 3.4.0 (64-bit) on Windows 8.1 64-bit.

I am having trouble restoring the position and size (geometry) of my very simple Py

Answer 1

You should indeed use QSetting for this.

All the Qt examples have been converted to Python. They are included in the source packages of PyQt (or PySide), which you can download here

You can also look online in the github repo, particularly in application.py of mainwindows example.

def readSettings(self):
    settings = QSettings("Trolltech", "Application Example")
    pos = settings.value("pos", QPoint(200, 200))
    size = settings.value("size", QSize(400, 400))
    self.resize(size)
    self.move(pos)

def writeSettings(self):
    settings = QSettings("Trolltech", "Application Example")
    settings.setValue("pos", self.pos())
    settings.setValue("size", self.size())

Fire writeSettings() before quitting and initiate readSettings() on startup.

Answer 2

In my case I use .ini files to store settings (language, default user, ...). the same code works on both Debian and Windows.

An example:

from PySide.QtCore import QSettings

self.settings = QSettings('settings.ini', QSettings.IniFormat)
...
self.settings.setValue('size', self.size())

Answer 3

This should do.

import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtCore import QSettings, QPoint, QSize

class myApp(QWidget):
    def __init__(self):
        super(myApp, self).__init__()

        self.settings = QSettings( 'My company', 'myApp')     

        # Initial window size/pos last saved. Use default values for first time
        self.resize(self.settings.value("size", QSize(270, 225)))
        self.move(self.settings.value("pos", QPoint(50, 50)))

    def closeEvent(self, e):
        # Write window size and position to config file
        self.settings.setValue("size", self.size())
        self.settings.setValue("pos", self.pos())

        e.accept()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    frame = myApp()
    frame.show()
    app.exec_()

I simplified this example: QSettings(): How to save to current working directory

Answer 4

Similar to @Valentin's response, because I feel settings are being written to registry, which will be issue for cross compatiblity. Here is the relevant startEvent() and closeEvent() for the job.

def startEvent()
    self.settings = QSettings(QSettings.IniFormat,QSettings.SystemScope, '__MyBiz', '__settings')
    self.settings.setFallbacksEnabled(False)    # File only, not registry or or.

    # setPath() to try to save to current working directory
    self.settings.setPath(QSettings.IniFormat,QSettings.SystemScope, './__settings.ini')

    # Initial window size/pos last saved
    self.resize(self.settings.value("size", QSize(270, 225)))
    self.move(self.settings.value("pos", QPoint(50, 50)))

    self.tab = QWidget()

def closeEvent(self, e):
    # Write window size and position to config file
    self.settings.setValue("size", self.size())
    self.settings.setValue("pos", self.pos())

startEvent() should be initiated at startup and closeEvent() should be taken care before quitting the main window.