[app] store window settings and restore upon startup

pyrelacs/app.py

@@ -3,7 +3,7 @@ import sys
 import pathlib
 import ctypes
 
-from PyQt6.QtCore import QProcess, QSize, QThreadPool, Qt
+from PyQt6.QtCore import QProcess, QSize, QThreadPool, Qt, QSettings
 from PyQt6.QtWidgets import (
     QApplication,
     QGridLayout,
@@ -19,6 +19,7 @@ from IPython import embed
 import numpy as np
 
 from pyrelacs.util.logging import config_logging
+import pyrelacs.info as info
 
 log = config_logging()
 
@@ -139,10 +140,33 @@ class PyRelacs(QMainWindow):
 
 def main():
     app = QApplication(sys.argv)
+    app.setApplicationName(info.NAME)
+    app.setApplicationVersion(str(info.VERSION))
+    app.setOrganizationDomain(info.ORGANIZATION)
+
+    # read window settings
+    settings = QSettings(info.ORGANIZATION, info.NAME)
+    width = int(settings.value("app/width", 1024))
+    height = int(settings.value("app/height", 768))
+    x = int(settings.value("app/pos_x", 100))
+    y = int(settings.value("app/pos_y", 100))
+
     window = PyRelacs()
+    window.setMinimumWidth(200)
+    window.setMinimumHeight(200)
+    window.resize(width, height)
+    window.move(x, y)
     window.show()
     app.exec()
 
+    # store window position and size
+    pos = window.pos()
+    settings.setValue("app/width", window.width())
+    settings.setValue("app/height", window.height())
+    settings.setValue("app/pos_x", pos.x())
+    settings.setValue("app/pos_y", pos.y())
+    sys.exit(exit_code)
+
 
 if __name__ == "__main__":
     main()