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@@ -1,94 +1,94 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 | 36 | 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 | 39 | _qt_apis = (QT_API_PYSIDE, 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 | elif mpqt.lower() == 'pyqtv2': | |
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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 | 86 | return matplotlib_options(mpl) or [QT_API_PYQT_DEFAULT, QT_API_PYSIDE, QT_API_PYQT5] |
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87 | 87 | elif qt_api not in _qt_apis: |
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88 | 88 | raise RuntimeError("Invalid Qt API %r, valid values are: %r" % |
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89 | 89 | (qt_api, ', '.join(_qt_apis))) |
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90 | 90 | else: |
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91 | 91 | return [qt_api] |
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92 | 92 | |
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93 | 93 | api_opts = get_options() |
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94 | 94 | QtCore, QtGui, QtSvg, QT_API = load_qt(api_opts) |
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