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@@ -1,94 +1,95 b'' | |||
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1 | 1 | """ Import Qt in a manner suitable for an IPython kernel. |
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2 | 2 | |
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3 | 3 | This is the import used for the `gui=qt` or `matplotlib=qt` initialization. |
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4 | 4 | |
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5 | 5 | Import Priority: |
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6 | 6 | |
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7 | 7 | if Qt has been imported anywhere else: |
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8 | 8 | use that |
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9 | 9 | |
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10 | 10 | if matplotlib has been imported and doesn't support v2 (<= 1.0.1): |
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11 | 11 | use PyQt4 @v1 |
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12 | 12 | |
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13 | 13 | Next, ask QT_API env variable |
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14 | 14 | |
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15 | 15 | if QT_API not set: |
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16 | 16 | ask matplotlib what it's using. If Qt4Agg or Qt5Agg, then use the |
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17 | 17 | version matplotlib is configured with |
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18 | 18 | |
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19 | 19 | else: (matplotlib said nothing) |
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20 | 20 | # this is the default path - nobody told us anything |
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21 | 21 | try in this order: |
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22 | 22 | PyQt default version, PySide, PyQt5 |
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23 | 23 | else: |
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24 | 24 | use what QT_API says |
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25 | 25 | |
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26 | 26 | """ |
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27 | 27 | # NOTE: This is no longer an external, third-party module, and should be |
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28 | 28 | # considered part of IPython. For compatibility however, it is being kept in |
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29 | 29 | # IPython/external. |
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30 | 30 | |
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31 | 31 | import os |
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32 | 32 | import sys |
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33 | 33 | |
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34 | 34 | from IPython.utils.version import check_version |
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35 | 35 | from IPython.external.qt_loaders import (load_qt, loaded_api, QT_API_PYSIDE, |
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36 | QT_API_PYQT, QT_API_PYQT5, | |
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36 | QT_API_PYSIDE2, QT_API_PYQT, QT_API_PYQT5, | |
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37 | 37 | QT_API_PYQTv1, QT_API_PYQT_DEFAULT) |
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38 | 38 | |
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39 | _qt_apis = (QT_API_PYSIDE, QT_API_PYQT, QT_API_PYQT5, QT_API_PYQTv1, | |
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39 | _qt_apis = (QT_API_PYSIDE, QT_API_PYSIDE2, QT_API_PYQT, QT_API_PYQT5, QT_API_PYQTv1, | |
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40 | 40 | QT_API_PYQT_DEFAULT) |
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41 | 41 | |
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42 | 42 | #Constraints placed on an imported matplotlib |
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43 | 43 | def matplotlib_options(mpl): |
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44 | 44 | if mpl is None: |
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45 | 45 | return |
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46 | 46 | backend = mpl.rcParams.get('backend', None) |
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47 | 47 | if backend == 'Qt4Agg': |
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48 | 48 | mpqt = mpl.rcParams.get('backend.qt4', None) |
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49 | 49 | if mpqt is None: |
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50 | 50 | return None |
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51 | 51 | if mpqt.lower() == 'pyside': |
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52 | 52 | return [QT_API_PYSIDE] |
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53 | 53 | elif mpqt.lower() == 'pyqt4': |
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54 | 54 | return [QT_API_PYQT_DEFAULT] |
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55 | 55 | elif mpqt.lower() == 'pyqt4v2': |
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56 | 56 | return [QT_API_PYQT] |
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57 | 57 | raise ImportError("unhandled value for backend.qt4 from matplotlib: %r" % |
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58 | 58 | mpqt) |
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59 | 59 | elif backend == 'Qt5Agg': |
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60 | 60 | mpqt = mpl.rcParams.get('backend.qt5', None) |
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61 | 61 | if mpqt is None: |
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62 | 62 | return None |
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63 | 63 | if mpqt.lower() == 'pyqt5': |
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64 | 64 | return [QT_API_PYQT5] |
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65 | 65 | raise ImportError("unhandled value for backend.qt5 from matplotlib: %r" % |
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66 | 66 | mpqt) |
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67 | 67 | |
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68 | 68 | def get_options(): |
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69 | 69 | """Return a list of acceptable QT APIs, in decreasing order of |
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70 | 70 | preference |
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71 | 71 | """ |
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72 | 72 | #already imported Qt somewhere. Use that |
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73 | 73 | loaded = loaded_api() |
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74 | 74 | if loaded is not None: |
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75 | 75 | return [loaded] |
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76 | 76 | |
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77 | 77 | mpl = sys.modules.get('matplotlib', None) |
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78 | 78 | |
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79 | 79 | if mpl is not None and not check_version(mpl.__version__, '1.0.2'): |
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80 | 80 | #1.0.1 only supports PyQt4 v1 |
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81 | 81 | return [QT_API_PYQT_DEFAULT] |
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82 | 82 | |
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83 | 83 | qt_api = os.environ.get('QT_API', None) |
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84 | 84 | if qt_api is None: |
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85 | 85 | #no ETS variable. Ask mpl, then use default fallback path |
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86 |
return matplotlib_options(mpl) or [QT_API_PYQT_DEFAULT, QT_API_PYSIDE, |
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86 | return matplotlib_options(mpl) or [QT_API_PYQT_DEFAULT, QT_API_PYSIDE, | |
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87 | QT_API_PYQT5, QT_API_PYSIDE2] | |
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87 | 88 | elif qt_api not in _qt_apis: |
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88 | 89 | raise RuntimeError("Invalid Qt API %r, valid values are: %r" % |
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89 | 90 | (qt_api, ', '.join(_qt_apis))) |
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90 | 91 | else: |
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91 | 92 | return [qt_api] |
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92 | 93 | |
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93 | 94 | api_opts = get_options() |
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94 | 95 | QtCore, QtGui, QtSvg, QT_API = load_qt(api_opts) |
@@ -1,344 +1,373 b'' | |||
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1 | 1 | """ |
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2 | 2 | This module contains factory functions that attempt |
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3 | 3 | to return Qt submodules from the various python Qt bindings. |
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4 | 4 | |
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5 | 5 | It also protects against double-importing Qt with different |
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6 | 6 | bindings, which is unstable and likely to crash |
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7 | 7 | |
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8 | 8 | This is used primarily by qt and qt_for_kernel, and shouldn't |
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9 | 9 | be accessed directly from the outside |
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10 | 10 | """ |
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11 | 11 | import sys |
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12 | 12 | import types |
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13 | 13 | from functools import partial |
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14 | 14 | from importlib import import_module |
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15 | 15 | |
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16 | 16 | from IPython.utils.version import check_version |
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17 | 17 | |
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18 | 18 | # Available APIs. |
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19 | 19 | QT_API_PYQT = 'pyqt' # Force version 2 |
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20 | 20 | QT_API_PYQT5 = 'pyqt5' |
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21 | 21 | QT_API_PYQTv1 = 'pyqtv1' # Force version 2 |
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22 | 22 | QT_API_PYQT_DEFAULT = 'pyqtdefault' # use system default for version 1 vs. 2 |
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23 | 23 | QT_API_PYSIDE = 'pyside' |
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24 | 24 | QT_API_PYSIDE2 = 'pyside2' |
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25 | 25 | |
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26 | 26 | api_to_module = {QT_API_PYSIDE2: 'PySide2', |
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27 | 27 | QT_API_PYSIDE: 'PySide', |
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28 | 28 | QT_API_PYQT: 'PyQt4', |
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29 | 29 | QT_API_PYQTv1: 'PyQt4', |
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30 | 30 | QT_API_PYQT5: 'PyQt5', |
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31 | 31 | QT_API_PYQT_DEFAULT: 'PyQt4', |
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32 | 32 | } |
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33 | 33 | |
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34 | 34 | |
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35 | 35 | class ImportDenier(object): |
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36 | 36 | """Import Hook that will guard against bad Qt imports |
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37 | 37 | once IPython commits to a specific binding |
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38 | 38 | """ |
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39 | 39 | |
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40 | 40 | def __init__(self): |
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41 | 41 | self.__forbidden = set() |
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42 | 42 | |
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43 | 43 | def forbid(self, module_name): |
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44 | 44 | sys.modules.pop(module_name, None) |
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45 | 45 | self.__forbidden.add(module_name) |
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46 | 46 | |
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47 | 47 | def find_module(self, fullname, path=None): |
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48 | 48 | if path: |
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49 | 49 | return |
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50 | 50 | if fullname in self.__forbidden: |
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51 | 51 | return self |
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52 | 52 | |
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53 | 53 | def load_module(self, fullname): |
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54 | 54 | raise ImportError(""" |
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55 | 55 | Importing %s disabled by IPython, which has |
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56 | 56 | already imported an Incompatible QT Binding: %s |
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57 | 57 | """ % (fullname, loaded_api())) |
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58 | 58 | |
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59 | 59 | ID = ImportDenier() |
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60 | 60 | sys.meta_path.append(ID) |
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61 | 61 | |
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62 | 62 | |
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63 | 63 | def commit_api(api): |
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64 | 64 | """Commit to a particular API, and trigger ImportErrors on subsequent |
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65 | 65 | dangerous imports""" |
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66 | 66 | |
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67 | if api == QT_API_PYSIDE2: | |
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68 | ID.forbid('PySide') | |
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69 | ID.forbid('PyQt4') | |
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70 | ID.forbid('PyQt5') | |
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67 | 71 | if api == QT_API_PYSIDE: |
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72 | ID.forbid('PySide2') | |
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68 | 73 | ID.forbid('PyQt4') |
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69 | 74 | ID.forbid('PyQt5') |
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70 | 75 | elif api == QT_API_PYQT5: |
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76 | ID.forbid('PySide2') | |
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71 | 77 | ID.forbid('PySide') |
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72 | 78 | ID.forbid('PyQt4') |
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73 | 79 | else: # There are three other possibilities, all representing PyQt4 |
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74 | 80 | ID.forbid('PyQt5') |
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81 | ID.forbid('PySide2') | |
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75 | 82 | ID.forbid('PySide') |
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76 | 83 | |
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77 | 84 | |
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78 | 85 | def loaded_api(): |
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79 | 86 | """Return which API is loaded, if any |
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80 | 87 | |
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81 | 88 | If this returns anything besides None, |
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82 | 89 | importing any other Qt binding is unsafe. |
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83 | 90 | |
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84 | 91 | Returns |
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85 | 92 | ------- |
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86 | None, 'pyside', 'pyqt', 'pyqt5', or 'pyqtv1' | |
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93 | None, 'pyside2', 'pyside', 'pyqt', 'pyqt5', or 'pyqtv1' | |
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87 | 94 | """ |
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88 | 95 | if 'PyQt4.QtCore' in sys.modules: |
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89 | 96 | if qtapi_version() == 2: |
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90 | 97 | return QT_API_PYQT |
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91 | 98 | else: |
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92 | 99 | return QT_API_PYQTv1 |
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93 | 100 | elif 'PySide.QtCore' in sys.modules: |
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94 | 101 | return QT_API_PYSIDE |
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102 | elif 'PySide2.QtCore' in sys.modules: | |
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103 | return QT_API_PYSIDE2 | |
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95 | 104 | elif 'PyQt5.QtCore' in sys.modules: |
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96 | 105 | return QT_API_PYQT5 |
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97 | 106 | return None |
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98 | 107 | |
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99 | 108 | |
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100 | 109 | def has_binding(api): |
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101 | """Safely check for PyQt4/5 or PySide, without importing submodules | |
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110 | """Safely check for PyQt4/5, PySide or PySide2, without importing submodules | |
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102 | 111 | |
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103 | 112 | Supports Python <= 3.3 |
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104 | 113 | |
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105 | 114 | Parameters |
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106 | 115 | ---------- |
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107 | api : str [ 'pyqtv1' | 'pyqt' | 'pyqt5' | 'pyside' | 'pyqtdefault'] | |
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116 | api : str [ 'pyqtv1' | 'pyqt' | 'pyqt5' | 'pyside' | 'pyside2' | 'pyqtdefault'] | |
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108 | 117 | Which module to check for |
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109 | 118 | |
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110 | 119 | Returns |
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111 | 120 | ------- |
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112 | 121 | True if the relevant module appears to be importable |
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113 | 122 | """ |
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114 | 123 | # we can't import an incomplete pyside and pyqt4 |
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115 | 124 | # this will cause a crash in sip (#1431) |
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116 | 125 | # check for complete presence before importing |
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117 | 126 | module_name = api_to_module[api] |
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118 | 127 | |
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119 | 128 | import imp |
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120 | 129 | try: |
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121 | 130 | #importing top level PyQt4/PySide module is ok... |
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122 | 131 | mod = import_module(module_name) |
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123 | 132 | #...importing submodules is not |
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124 | 133 | imp.find_module('QtCore', mod.__path__) |
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125 | 134 | imp.find_module('QtGui', mod.__path__) |
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126 | 135 | imp.find_module('QtSvg', mod.__path__) |
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127 |
if api |
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136 | if api in (QT_API_PYQT5, QT_API_PYSIDE2): | |
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128 | 137 | # QT5 requires QtWidgets too |
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129 | 138 | imp.find_module('QtWidgets', mod.__path__) |
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130 | 139 | |
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131 | 140 | #we can also safely check PySide version |
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132 | 141 | if api == QT_API_PYSIDE: |
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133 | 142 | return check_version(mod.__version__, '1.0.3') |
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134 | 143 | else: |
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135 | 144 | return True |
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136 | 145 | except ImportError: |
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137 | 146 | return False |
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138 | 147 | |
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139 | 148 | def has_binding_new(api): |
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140 | """Safely check for PyQt4/5 or PySide, without importing submodules | |
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149 | """Safely check for PyQt4/5, PySide or PySide2, without importing submodules | |
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141 | 150 | |
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142 | 151 | Supports Python >= 3.4 |
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143 | 152 | |
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144 | 153 | Parameters |
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145 | 154 | ---------- |
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146 | api : str [ 'pyqtv1' | 'pyqt' | 'pyqt5' | 'pyside' | 'pyqtdefault'] | |
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155 | api : str [ 'pyqtv1' | 'pyqt' | 'pyqt5' | 'pyside' | 'pyside2' | 'pyqtdefault'] | |
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147 | 156 | Which module to check for |
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148 | 157 | |
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149 | 158 | Returns |
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150 | 159 | ------- |
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151 | 160 | True if the relevant module appears to be importable |
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152 | 161 | """ |
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153 | 162 | module_name = api_to_module[api] |
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154 | 163 | from importlib.util import find_spec |
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155 | 164 | |
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156 | 165 | required = ['QtCore', 'QtGui', 'QtSvg'] |
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157 | 166 | if api in (QT_API_PYQT5, QT_API_PYSIDE2): |
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158 | 167 | # QT5 requires QtWidgets too |
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159 | 168 | required.append('QtWidgets') |
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160 | 169 | |
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161 | 170 | for submod in required: |
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162 | 171 | try: |
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163 | 172 | spec = find_spec('%s.%s' % (module_name, submod)) |
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164 | 173 | except ImportError: |
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165 | 174 | # Package (e.g. PyQt5) not found |
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166 | 175 | return False |
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167 | 176 | else: |
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168 | 177 | if spec is None: |
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169 | 178 | # Submodule (e.g. PyQt5.QtCore) not found |
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170 | 179 | return False |
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171 | 180 | |
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172 | 181 | if api == QT_API_PYSIDE: |
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173 | 182 | # We can also safely check PySide version |
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174 | 183 | import PySide |
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175 | 184 | return check_version(PySide.__version__, '1.0.3') |
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176 | 185 | |
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177 | 186 | return True |
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178 | 187 | |
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179 | 188 | if sys.version_info >= (3, 4): |
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180 | 189 | has_binding = has_binding_new |
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181 | 190 | |
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182 | 191 | def qtapi_version(): |
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183 | 192 | """Return which QString API has been set, if any |
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184 | 193 | |
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185 | 194 | Returns |
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186 | 195 | ------- |
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187 | 196 | The QString API version (1 or 2), or None if not set |
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188 | 197 | """ |
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189 | 198 | try: |
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190 | 199 | import sip |
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191 | 200 | except ImportError: |
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192 | 201 | return |
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193 | 202 | try: |
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194 | 203 | return sip.getapi('QString') |
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195 | 204 | except ValueError: |
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196 | 205 | return |
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197 | 206 | |
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198 | 207 | |
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199 | 208 | def can_import(api): |
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200 | 209 | """Safely query whether an API is importable, without importing it""" |
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201 | 210 | if not has_binding(api): |
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202 | 211 | return False |
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203 | 212 | |
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204 | 213 | current = loaded_api() |
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205 | 214 | if api == QT_API_PYQT_DEFAULT: |
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206 | 215 | return current in [QT_API_PYQT, QT_API_PYQTv1, None] |
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207 | 216 | else: |
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208 | 217 | return current in [api, None] |
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209 | 218 | |
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210 | 219 | |
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211 | 220 | def import_pyqt4(version=2): |
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212 | 221 | """ |
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213 | 222 | Import PyQt4 |
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214 | 223 | |
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215 | 224 | Parameters |
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216 | 225 | ---------- |
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217 | 226 | version : 1, 2, or None |
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218 | 227 | Which QString/QVariant API to use. Set to None to use the system |
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219 | 228 | default |
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220 | 229 | |
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221 | 230 | ImportErrors rasied within this function are non-recoverable |
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222 | 231 | """ |
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223 | 232 | # The new-style string API (version=2) automatically |
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224 | 233 | # converts QStrings to Unicode Python strings. Also, automatically unpacks |
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225 | 234 | # QVariants to their underlying objects. |
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226 | 235 | import sip |
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227 | 236 | |
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228 | 237 | if version is not None: |
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229 | 238 | sip.setapi('QString', version) |
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230 | 239 | sip.setapi('QVariant', version) |
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231 | 240 | |
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232 | 241 | from PyQt4 import QtGui, QtCore, QtSvg |
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233 | 242 | |
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234 | 243 | if not check_version(QtCore.PYQT_VERSION_STR, '4.7'): |
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235 | 244 | raise ImportError("IPython requires PyQt4 >= 4.7, found %s" % |
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236 | 245 | QtCore.PYQT_VERSION_STR) |
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237 | 246 | |
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238 | 247 | # Alias PyQt-specific functions for PySide compatibility. |
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239 | 248 | QtCore.Signal = QtCore.pyqtSignal |
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240 | 249 | QtCore.Slot = QtCore.pyqtSlot |
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241 | 250 | |
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242 | 251 | # query for the API version (in case version == None) |
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243 | 252 | version = sip.getapi('QString') |
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244 | 253 | api = QT_API_PYQTv1 if version == 1 else QT_API_PYQT |
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245 | 254 | return QtCore, QtGui, QtSvg, api |
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246 | 255 | |
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247 | 256 | |
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248 | 257 | def import_pyqt5(): |
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249 | 258 | """ |
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250 | 259 | Import PyQt5 |
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251 | 260 | |
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252 | 261 | ImportErrors rasied within this function are non-recoverable |
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253 | 262 | """ |
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254 | 263 | import sip |
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255 | 264 | |
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256 | 265 | from PyQt5 import QtCore, QtSvg, QtWidgets, QtGui |
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257 | 266 | |
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258 | 267 | # Alias PyQt-specific functions for PySide compatibility. |
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259 | 268 | QtCore.Signal = QtCore.pyqtSignal |
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260 | 269 | QtCore.Slot = QtCore.pyqtSlot |
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261 | 270 | |
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262 | 271 | # Join QtGui and QtWidgets for Qt4 compatibility. |
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263 | 272 | QtGuiCompat = types.ModuleType('QtGuiCompat') |
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264 | 273 | QtGuiCompat.__dict__.update(QtGui.__dict__) |
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265 | 274 | QtGuiCompat.__dict__.update(QtWidgets.__dict__) |
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266 | 275 | |
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267 | 276 | api = QT_API_PYQT5 |
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268 | 277 | return QtCore, QtGuiCompat, QtSvg, api |
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269 | 278 | |
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270 | 279 | |
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271 | 280 | def import_pyside(): |
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272 | 281 | """ |
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273 | 282 | Import PySide |
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274 | 283 | |
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275 | 284 | ImportErrors raised within this function are non-recoverable |
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276 | 285 | """ |
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277 | 286 | from PySide import QtGui, QtCore, QtSvg |
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278 | 287 | return QtCore, QtGui, QtSvg, QT_API_PYSIDE |
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279 | 288 | |
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289 | def import_pyside2(): | |
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290 | """ | |
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291 | Import PySide2 | |
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292 | ||
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293 | ImportErrors raised within this function are non-recoverable | |
|
294 | """ | |
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295 | from PySide2 import QtGui, QtCore, QtSvg, QtWidgets, QtPrintSupport | |
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296 | ||
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297 | # Join QtGui and QtWidgets for Qt4 compatibility. | |
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298 | QtGuiCompat = types.ModuleType('QtGuiCompat') | |
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299 | QtGuiCompat.__dict__.update(QtGui.__dict__) | |
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300 | QtGuiCompat.__dict__.update(QtWidgets.__dict__) | |
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301 | QtGuiCompat.__dict__.update(QtPrintSupport.__dict__) | |
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302 | ||
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303 | return QtCore, QtGuiCompat, QtSvg, QT_API_PYSIDE2 | |
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304 | ||
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280 | 305 | |
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281 | 306 | def load_qt(api_options): |
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282 | 307 | """ |
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283 | 308 | Attempt to import Qt, given a preference list |
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284 | 309 | of permissible bindings |
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285 | 310 | |
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286 | 311 | It is safe to call this function multiple times. |
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287 | 312 | |
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288 | 313 | Parameters |
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289 | 314 | ---------- |
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290 | 315 | api_options: List of strings |
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291 | The order of APIs to try. Valid items are 'pyside', | |
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316 | The order of APIs to try. Valid items are 'pyside', 'pyside2', | |
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292 | 317 | 'pyqt', 'pyqt5', 'pyqtv1' and 'pyqtdefault' |
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293 | 318 | |
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294 | 319 | Returns |
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295 | 320 | ------- |
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296 | 321 | |
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297 | 322 | A tuple of QtCore, QtGui, QtSvg, QT_API |
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298 | 323 | The first three are the Qt modules. The last is the |
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299 | 324 | string indicating which module was loaded. |
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300 | 325 | |
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301 | 326 | Raises |
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302 | 327 | ------ |
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303 | 328 | ImportError, if it isn't possible to import any requested |
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304 | 329 | bindings (either becaues they aren't installed, or because |
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305 | 330 | an incompatible library has already been installed) |
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306 | 331 | """ |
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307 | loaders = {QT_API_PYSIDE: import_pyside, | |
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332 | loaders = { | |
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333 | QT_API_PYSIDE2: import_pyside2, | |
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334 | QT_API_PYSIDE: import_pyside, | |
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308 | 335 | QT_API_PYQT: import_pyqt4, |
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309 | 336 | QT_API_PYQT5: import_pyqt5, |
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310 | 337 | QT_API_PYQTv1: partial(import_pyqt4, version=1), |
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311 | 338 | QT_API_PYQT_DEFAULT: partial(import_pyqt4, version=None) |
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312 |
|
|
|
339 | } | |
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313 | 340 | |
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314 | 341 | for api in api_options: |
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315 | 342 | |
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316 | 343 | if api not in loaders: |
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317 | 344 | raise RuntimeError( |
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318 | 345 | "Invalid Qt API %r, valid values are: %s" % |
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319 | 346 | (api, ", ".join(["%r" % k for k in loaders.keys()]))) |
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320 | 347 | |
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321 | 348 | if not can_import(api): |
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322 | 349 | continue |
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323 | 350 | |
|
324 | 351 | #cannot safely recover from an ImportError during this |
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325 | 352 | result = loaders[api]() |
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326 | 353 | api = result[-1] # changed if api = QT_API_PYQT_DEFAULT |
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327 | 354 | commit_api(api) |
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328 | 355 | return result |
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329 | 356 | else: |
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330 | 357 | raise ImportError(""" |
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331 | 358 | Could not load requested Qt binding. Please ensure that |
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332 |
PyQt4 >= 4.7, PyQt5 |
|
|
359 | PyQt4 >= 4.7, PyQt5, PySide >= 1.0.3 or PySide2 is available, | |
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333 | 360 | and only one is imported per session. |
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334 | 361 | |
|
335 | 362 | Currently-imported Qt library: %r |
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336 | 363 | PyQt4 available (requires QtCore, QtGui, QtSvg): %s |
|
337 | 364 | PyQt5 available (requires QtCore, QtGui, QtSvg, QtWidgets): %s |
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338 | 365 | PySide >= 1.0.3 installed: %s |
|
366 | PySide2 installed: %s | |
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339 | 367 | Tried to load: %r |
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340 | 368 | """ % (loaded_api(), |
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341 | 369 | has_binding(QT_API_PYQT), |
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342 | 370 | has_binding(QT_API_PYQT5), |
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343 | 371 | has_binding(QT_API_PYSIDE), |
|
372 | has_binding(QT_API_PYSIDE2), | |
|
344 | 373 | api_options)) |
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