use QSettings to store window geometry

main.py

@@ -10,6 +10,7 @@ import sys
 
 import urlutils
 from aboutdialog import AboutDialog
+from cutesettings import CuteSettings
 from ravenui import RavenUI
 from settingsstore import SettingsStore
 from highlightingdialog import HighlightingDialog
@@ -28,7 +29,8 @@ class MainWindow(QMainWindow):
 
         self.settings = SettingsStore.load()
         self.setWindowTitle(self.tr("RavenLog"))
-        self.setGeometry(0, 0, 640, 480)
+        self._restore_window()
+
         self.setDockNestingEnabled(True)
         self.setAcceptDrops(True)
 
@@ -135,6 +137,15 @@ class MainWindow(QMainWindow):
         file = urlutils.url_to_path(e.mimeData().text())
         self.open_file(file)
 
+    def _restore_window(self):
+        qsettings = CuteSettings()
+        geometry_restored = False
+        geometry = qsettings.value("mainWindow/geometry")
+        if geometry:
+            geometry_restored = self.restoreGeometry(geometry)
+        if not geometry_restored:
+            self.setGeometry(0, 0, 800, 600)
+
     def closeEvent(self, event):
         self.destruct()
 
@@ -142,6 +153,7 @@ class MainWindow(QMainWindow):
         self.tabs.destruct()
         self.close()
         SettingsStore.save(self.settings)
+        CuteSettings().set_value("mainWindow/geometry", self.saveGeometry())
 
 
 def stop_signal(signum, _stackframe):