1 files changed, 82 insertions, 0 deletions
diff --git a/silx/gui/qt/inspect.py b/silx/gui/qt/inspect.py
new file mode 100644
index 0000000..c6c2cbe
--- /dev/null
+++ b/silx/gui/qt/inspect.py
@@ -0,0 +1,82 @@
+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2018 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.
+#
+# ###########################################################################*/
+"""This module provides functions to access Qt C++ object state:
+
+- :func:`isValid` to check whether a QObject C++ pointer is valid.
+- :func:`createdByPython` to check if a QObject was created from Python.
+- :func:`ownedByPython` to check if a QObject is currently owned by Python.
+"""
+
+__authors__ = ["T. Vincent"]
+__license__ = "MIT"
+__date__ = "08/10/2018"
+
+
+from . import _qt as qt
+
+
+if qt.BINDING in ('PyQt4', 'PyQt5'):
+    if qt.BINDING == 'PyQt5':
+        try:
+            from PyQt5.sip import isdeleted as _isdeleted  # noqa
+            from PyQt5.sip import ispycreated as createdByPython  # noqa
+            from PyQt5.sip import ispyowned as ownedByPython  # noqa
+        except ImportError:
+            from sip import isdeleted as _isdeleted  # noqa
+            from sip import ispycreated as createdByPython  # noqa
+            from sip import ispyowned as ownedByPython  # noqa
+
+    else:  # PyQt4
+        from sip import isdeleted as _isdeleted  # noqa
+        from sip import ispycreated as createdByPython  # noqa
+        from sip import ispyowned as ownedByPython  # noqa
+
+    def isValid(obj):
+        """Returns True if underlying C++ object is valid.
+
+        :param QObject obj:
+        :rtype: bool
+        """
+        return not _isdeleted(obj)
+
+elif qt.BINDING == 'PySide2':
+    from PySide2.shiboken2 import isValid  # noqa
+    from PySide2.shiboken2 import createdByPython  # noqa
+    from PySide2.shiboken2 import ownedByPython  # noqa
+
+elif qt.BINDING == 'PySide':
+    try:  # Available through PySide
+        from PySide.shiboken import isValid  # noqa
+        from PySide.shiboken import createdByPython  # noqa
+        from PySide.shiboken import ownedByPython  # noqa
+    except ImportError:  # Available through standalone shiboken package
+        from Shiboken.shiboken import isValid  # noqa
+        from Shiboken.shiboken import createdByPython  # noqa
+        from Shiboken.shiboken import ownedByPython  # noqa
+
+else:
+    raise ImportError("Unsupported Qt binding %s" % qt.BINDING)
+
+__all__ = ['isValid', 'createdByPython', 'ownedByPython']