Added environment settings and allowed variable scaling (#1978)

mantidproject · Nov 27, 2023 · 5150897 · 5150897
2 parents a621306 + 1299d90
commit 5150897
Showing 1 changed file with 13 additions and 0 deletions.
diff --git a/mantidimaging/main.py b/mantidimaging/main.py
@@ -6,8 +6,11 @@
 import argparse
 import sys
 import warnings
+import os
 
 from PyQt5.QtWidgets import QApplication
+from PyQt5 import QtCore
+from PyQt5.QtGui import QFont, QGuiApplication
 
 import mantidimaging.core.parallel.manager as pm
 
@@ -52,11 +55,21 @@ def parse_args() -> argparse.Namespace:
 
 
 def setup_application() -> QApplication:
+    QGuiApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)
     q_application = QApplication(sys.argv)
     q_application.setStyle('Fusion')
     q_application.setApplicationName("Mantid Imaging")
     q_application.setOrganizationName("mantidproject")
     q_application.setOrganizationDomain("mantidproject.org")
+    screens = q_application.screens()
+    if sys.platform == 'win32':
+        os.environ["QT_ENABLE_HIGHDPI_SCALING"] = "1"
+        os.environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1"
+        os.environ["QT_SCALE_FACTOR"] = "1"
+        base_font_size = int(q_application.font().pointSize() * 0.8)
+        font_scale_factor = screens[0].physicalDotsPerInch() / 90
+        font = QFont(q_application.font().family(), int(font_scale_factor * base_font_size))
+        q_application.setFont(font)
     return q_application