Mercurial Repositories > eric / file comparison
comparison: eric6/Toolbox/PyQt4ImportHook.py
eric6/Toolbox/PyQt4ImportHook.py
- changeset 6942
- 2602857055c5
- parent 6645
- ad476851d7e0
- child 7192
- a22eee00b052
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| 6941:f99d60d6b59b | 6942:2602857055c5 |
|---|---|
| 1 # -*- coding: utf-8 -*- | |
| 2 | |
| 3 # Copyright (c) 2014 - 2019 Detlev Offenbach <detlev@die-offenbachs.de> | |
| 4 # | |
| 5 | |
| 6 """ | |
| 7 Module implementing an import hook converting PyQt5 imports to PyQt4 imports. | |
| 8 """ | |
| 9 | |
| 10 from __future__ import unicode_literals | |
| 11 | |
| 12 import sys | |
| 13 import importlib | |
| 14 | |
| 15 | |
| 16 class PyQt4Importer(object): | |
| 17 """ | |
| 18 Class implementing an importer converting PyQt5 imports to PyQt4 | |
| 19 imports. | |
| 20 """ | |
| 21 def __init__(self): | |
| 22 """ | |
| 23 Constructor | |
| 24 """ | |
| 25 self.__path = None | |
| 26 | |
| 27 def find_module(self, fullname, path=None): | |
| 28 """ | |
| 29 Public method returning the module loader. | |
| 30 | |
| 31 @param fullname name of the module to be loaded (string) | |
| 32 @param path path to resolve the module name (string) | |
| 33 @return module loader object | |
| 34 """ | |
| 35 if fullname.startswith("PyQt5"): | |
| 36 self.__path = path | |
| 37 return self | |
| 38 | |
| 39 return None | |
| 40 | |
| 41 @staticmethod | |
| 42 def QComboBox_currentData(other, role=None): | |
| 43 """ | |
| 44 Static method to emulate the currentData method of Qt5. | |
| 45 | |
| 46 @param other reference to the combo box to get the user data of | |
| 47 @type QComboBox | |
| 48 @param role role of which data should be retrieved | |
| 49 @type int | |
| 50 @return stored data at current selection | |
| 51 @rtype any | |
| 52 """ | |
| 53 import PyQt4.Qt | |
| 54 if role is None: | |
| 55 role = PyQt4.Qt.Qt.UserRole | |
| 56 | |
| 57 idx = other.currentIndex() | |
| 58 return other.itemData(idx, role) | |
| 59 | |
| 60 def load_module(self, fullname): | |
| 61 """ | |
| 62 Public method to load a module. | |
| 63 | |
| 64 @param fullname name of the module to be loaded (string) | |
| 65 @return reference to the loaded module (module) | |
| 66 """ | |
| 67 if fullname in ["PyQt5.QtWidgets", "PyQt5.QtPrintSupport"]: | |
| 68 newname = "PyQt4.QtGui" | |
| 69 elif fullname in ["PyQt5.QtWebKitWidgets"]: | |
| 70 newname = "PyQt4.QtWebKit" | |
| 71 else: | |
| 72 newname = fullname.replace("PyQt5", "PyQt4") | |
| 73 | |
| 74 module = importlib.import_module(newname) | |
| 75 sys.modules[fullname] = module | |
| 76 if fullname == "PyQt5.QtCore": | |
| 77 import PyQt4.QtGui | |
| 78 module.qInstallMessageHandler = module.qInstallMsgHandler | |
| 79 module.QItemSelectionModel = PyQt4.QtGui.QItemSelectionModel | |
| 80 module.QItemSelection = PyQt4.QtGui.QItemSelection | |
| 81 module.QSortFilterProxyModel = \ | |
| 82 PyQt4.QtGui.QSortFilterProxyModel | |
| 83 module.QAbstractProxyModel = PyQt4.QtGui.QAbstractProxyModel | |
| 84 module.QStringListModel = PyQt4.QtGui.QStringListModel | |
| 85 | |
| 86 PyQt4.QtGui.QComboBox.currentData = self.QComboBox_currentData | |
| 87 return module | |
| 88 | |
| 89 try: | |
| 90 if "--pyqt4" in sys.argv: | |
| 91 sys.argv.remove("--pyqt4") | |
| 92 # fake a failed PyQt5 import | |
| 93 raise ImportError | |
| 94 import PyQt5 # __IGNORE_WARNING__ | |
| 95 except ImportError: | |
| 96 sys.meta_path.insert(0, PyQt4Importer()) | |
| 97 | |
| 98 if sys.version_info[0] == 2: | |
| 99 try: | |
| 100 from PyQt5 import sip | |
| 101 except ImportError: | |
| 102 import sip | |
| 103 sip.setapi('QString', 2) | |
| 104 sip.setapi('QVariant', 2) | |
| 105 sip.setapi('QTextStream', 2) |
