1 # Copyright (C) 2016-2023 CEA, EDF
3 # This library is free software; you can redistribute it and/or
4 # modify it under the terms of the GNU Lesser General Public
5 # License as published by the Free Software Foundation; either
6 # version 2.1 of the License, or (at your option) any later version.
8 # This library is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 # Lesser General Public License for more details.
13 # You should have received a copy of the GNU Lesser General Public
14 # License along with this library; if not, write to the Free Software
15 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
21 Group under one hat PySide and PyQt5. PyQt5 is tried first.
26 if os.getenv("CURVEPLOT_FORCE_PYSIDE") is not None:
30 print("Using PyQt5 run-time ...")
35 print("Using PySide run-time ...")
37 raise Exception("Neither PyQt5 nor PySide could be imported!")
39 # Matplotlib has to be handled very early, otherwise it will switch to whatever it
40 # finds first on the machine
43 if _use_pyqt: back = 'PyQt5'
45 # As advised by MatPlotlib:
46 # "The backend.qt5 rcParam was deprecated in version 2.2. In order to force the use of a specific Qt binding, either import that binding first, or set the QT_API environment variable.
48 from matplotlib.backends import backend_qt5agg
49 print("Matplotlib found - Set matplotlib backend to '%s'!" % back)
51 # No matplotlib, silently discard err message.