fix(gui): update screen geometry retrieval to use primaryScreen for Qt5-Qt6 compatibility

(cherry picked from commit 371b5c9)

Author: PierreRaybaut

datalab/gui/tour.py

@@ -456,9 +456,8 @@ def __resize_window(self, factor: float) -> None:
         Args:
             factor: Factor by which the size of the window is multiplied.
         """
-        desktop = QW.QApplication.desktop()
-        screen = desktop.screenNumber(desktop.cursor().pos())
-        screen_geometry = desktop.screenGeometry(screen)
+        screen = QW.QApplication.primaryScreen()
+        screen_geometry = screen.geometry()
         width = int(screen_geometry.width() * factor)
         height = int(screen_geometry.height() * factor)
         self.win.resize(width, height)

datalab/tests/backbone/config_unit_test.py

@@ -128,7 +128,7 @@ def check_conf(conf, name, win: QW.QMainWindow, h5files):
         #  Check position, taking into account screen offset (e.g. Linux/Gnome)
         conf_x, conf_y = sec_main[OPT_POS.option]
         conf_w, conf_h = sec_main[OPT_SIZ.option]
-        available_go = QW.QDesktopWidget().availableGeometry()
+        available_go = QW.QApplication.primaryScreen().availableGeometry()
         x_offset, y_offset = available_go.x(), available_go.y()
         assert_in_interval(win.x(), conf_x - x_offset, 0, "X position")
         assert_in_interval(win.y(), conf_y - y_offset / 2, 15 + y_offset, "Y position")