path: root/sources/pyside2/PySide2/QtTest
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authorChristian Tismer <tismer@stackless.com>2017-09-30 12:43:22 +0200
committerChristian Tismer <tismer@stackless.com>2017-10-27 03:44:44 +0000
commite30e0c161b2b4d50484314bf006e9e5e8ff6b380 (patch)
treee0aa129fdda7a0a580bc200b8b9a1e758230979d /sources/pyside2/PySide2/QtTest
parent8ff047b26dd7e928bd35c519fb9e18db4d1b9a94 (diff)
Support the qApp macro correctly, final version incl. debug
For short the new features: - there is a qApp in QtCore, QtGui and QtWidgets for compatibility, and also in __builtins__ for a true macro-like experience. - if you delete any qApp variable, the Q*Application is reset and you can start over. Long description: There is a qApp macro in Qt5 which is equivalent to Q*Application.instance() . Python does not have macros. Both PyQt5 and PySide2 have an according structure in QtWidgets. In the case of PySide2, the qApp variable is first initialized to None and later to QApplication(). This does not reflect the original sense of the qApp macro, because - it only handles QApplication, - it does not handle destruction. This "macro" should live in QtCore, but both PyQt5 and PySide2 decided to put this in QtWidgets. As a compromize, I propose to put qApp into all three modules, and into __builtins__ as well, so wherever you create an application, you find this "macro" in place. While changing the code, I stumbled over the template set_qapp_parent_for_orphan. I tried to make sense out of it and finally removed it. There were no side effects but bug PYSIDE-85 is gone, now. With some extra effort, I created a singleton qApp that changes itself. This way, a true macro was simulated. Note that this was not possible with a garbage collected variable, and I had to make shiboken aware of this. As the final optimization, I turned qApp also into a fuse variable: Delete any qApp variable and Q*Application will finish when there is no extra reference. Task-number: PYSIDE-85 Task-number: PYSIDE-571 Change-Id: I7a56b19858f63349c98b95778759a6a6de856938 Reviewed-by: Christian Tismer <tismer@stackless.com>
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