Improve import

Use Qt.IsPySide2 / Qt.IsPyQt5 rather than try/except

Author: mara004

NodeGraphQt/widgets/viewer.py

@@ -2,11 +2,13 @@
 # -*- coding: utf-8 -*-
 import math
 
+import Qt
 from Qt import QtGui, QtCore, QtWidgets
 
-try:
+# use QOpenGLWidget instead of the deprecated QGLWdiegt to avoid probelms with Wayland
+if Qt.IsPySide2:
     from PySide2.QtWidgets import QOpenGLWidget
-except Exception:
+elif Qt.IsPyQt5:
     from PyQt5.QtWidgets import QOpenGLWidget
 
 from .dialogs import BaseDialog, FileDialog