1 files changed, 65 insertions, 0 deletions
diff --git a/src/silx/gui/utils/matplotlib.py b/src/silx/gui/utils/matplotlib.py
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+++ b/src/silx/gui/utils/matplotlib.py
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+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2016-2021 European Synchrotron Radiation Facility
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# ###########################################################################*/
+
+from __future__ import absolute_import
+
+"""This module initializes matplotlib and sets-up the backend to use.
+
+It MUST be imported prior to any other import of matplotlib.
+
+It provides the matplotlib :class:`FigureCanvasQTAgg` class corresponding
+to the used backend.
+"""
+
+__authors__ = ["T. Vincent"]
+__license__ = "MIT"
+__date__ = "02/05/2018"
+
+
+from pkg_resources import parse_version
+import matplotlib
+
+from .. import qt
+
+
+def _matplotlib_use(backend, force):
+    """Wrapper of `matplotlib.use` to set-up backend.
+
+     It adds extra initialization for PySide2 with matplotlib < 2.2.
+    """
+    # This is kept for compatibility with matplotlib < 2.2
+    if (parse_version(matplotlib.__version__) < parse_version('2.2') and
+            qt.BINDING == 'PySide2'):
+        matplotlib.rcParams['backend.qt5'] = 'PySide2'
+
+    matplotlib.use(backend, force=force)
+
+
+if qt.BINDING in ('PySide6', 'PyQt5', 'PySide2'):
+    _matplotlib_use('Qt5Agg', force=False)
+    from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg  # noqa
+
+else:
+    raise ImportError("Unsupported Qt binding: %s" % qt.BINDING)