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@@ -1,317 +1,333 b'' | |||
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1 | 1 | #!/usr/bin/env python |
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2 | 2 | # encoding: utf-8 |
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3 | 3 | """ |
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4 | 4 | Inputhook management for GUI event loop integration. |
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5 | 5 | """ |
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6 | 6 | |
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7 | 7 | #----------------------------------------------------------------------------- |
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8 | 8 | # Copyright (C) 2008-2009 The IPython Development Team |
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9 | 9 | # |
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10 | 10 | # Distributed under the terms of the BSD License. The full license is in |
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11 | 11 | # the file COPYING, distributed as part of this software. |
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12 | 12 | #----------------------------------------------------------------------------- |
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13 | 13 | |
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14 | 14 | #----------------------------------------------------------------------------- |
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15 | 15 | # Imports |
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16 | 16 | #----------------------------------------------------------------------------- |
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17 | 17 | |
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18 | 18 | import ctypes |
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19 | 19 | import sys |
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20 | 20 | |
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21 | 21 | #----------------------------------------------------------------------------- |
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22 | 22 | # Code |
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23 | 23 | #----------------------------------------------------------------------------- |
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24 | 24 | |
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25 | def _dummy_mainloop(*args, **kw): | |
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26 | pass | |
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25 | class _DummyMainloop(object): | |
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26 | """A special manager to hijack GUI mainloops that is mostly a no-op. | |
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27 | ||
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28 | This does have, however, special logic. | |
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29 | """ | |
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30 | def __init__(self, ml, ihm, gui_type): | |
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31 | self.ml = ml | |
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32 | self.ihm = ihm | |
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33 | self.gui_type = gui_type | |
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34 | ||
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35 | ||
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36 | def __call__(self, *args, **kw): | |
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37 | if self.ihm.current_gui() == self.gui_type: | |
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38 | pass | |
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39 | else: | |
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40 | self.ml(*args, **kw) | |
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27 | 41 | |
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28 | 42 | |
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29 | 43 | def spin_qt4(): |
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30 | 44 | from PyQt4 import QtCore, QtGui |
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31 | 45 | |
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32 | app = QtCore.QCoreApplication.instance() | |
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33 | if app is not None and app.thread == QtCore.QThread.currentThread(): | |
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46 | app = QtCore.QCoreApplication.instance() | |
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47 | if (app is not None) and (app.thread() == QtCore.QThread.currentThread()): | |
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34 | 48 | timer = QtCore.QTimer() |
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35 | 49 | QtCore.QObject.connect(timer, |
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36 | 50 | QtCore.SIGNAL('timeout()'), |
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51 | app, | |
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37 | 52 | QtCore.SLOT('quit()')) |
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38 |
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53 | timer.start(100) | |
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39 | 54 | QtCore.QCoreApplication.exec_() |
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40 | 55 | timer.stop() |
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41 | 56 | |
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42 | 57 | |
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43 | 58 | def spin_wx(): |
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44 | 59 | app = wx.GetApp() |
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45 | 60 | if app is not None and wx.Thread_IsMain(): |
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46 | 61 | evtloop = wx.EventLoop() |
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47 | 62 | ea = wx.EventLoopActivator(evtloop) |
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48 | 63 | while evtloop.Pending(): |
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49 | 64 | evtloop.Dispatch() |
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50 | 65 | app.ProcessIdle() |
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51 | 66 | del ea |
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52 | 67 | |
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53 | 68 | |
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54 | 69 | class InputHookManager(object): |
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55 | 70 | """Manage PyOS_InputHook for different GUI toolkits. |
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56 | 71 | |
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57 | 72 | This class installs various hooks under ``PyOSInputHook`` to handle |
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58 | 73 | GUI event loop integration. |
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59 | 74 | """ |
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60 | 75 | |
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61 | 76 | def __init__(self): |
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62 | 77 | self.PYFUNC = ctypes.PYFUNCTYPE(ctypes.c_int) |
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63 | 78 | self._apps = {} |
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64 | 79 | self._reset() |
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65 | 80 | |
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66 | 81 | def _reset(self): |
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67 | 82 | self._callback_pyfunctype = None |
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68 | 83 | self._callback = None |
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69 | 84 | self._installed = False |
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70 | 85 | self._current_gui = None |
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71 | 86 | |
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72 | 87 | def _hijack_wx(self): |
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73 | 88 | """Hijack the wx mainloop so a user calling it won't cause badness.""" |
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74 | 89 | import wx |
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75 | 90 | if hasattr(wx, '_core_'): core = getattr(wx, '_core_') |
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76 | 91 | elif hasattr(wx, '_core'): core = getattr(wx, '_core') |
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77 | 92 | else: raise AttributeError('Could not find wx core module') |
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78 | 93 | orig_mainloop = core.PyApp_MainLoop |
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79 |
core.PyApp_MainLoop = _ |
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94 | core.PyApp_MainLoop = _DummyMainloop | |
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80 | 95 | return orig_mainloop |
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81 | 96 | |
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82 | 97 | def _hijack_qt4(self): |
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83 | 98 | """Hijack the qt4 mainloop so a user calling it won't cause badness.""" |
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84 | 99 | from PyQt4 import QtGui, QtCore |
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85 | 100 | orig_mainloop = QtGui.qApp.exec_ |
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86 | QtGui.qApp.exec_ = _dummy_mainloop | |
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87 |
QtGui. |
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88 |
Qt |
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101 | dumb_ml = _DummyMainloop(orig_mainloop, self, 'qt4') | |
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102 | QtGui.qApp.exec_ = dumb_ml | |
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103 | QtGui.QApplication.exec_ = dumb_ml | |
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104 | QtCore.QCoreApplication.exec_ = dumb_ml | |
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89 | 105 | return orig_mainloop |
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90 | 106 | |
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91 | 107 | def _hijack_gtk(self): |
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92 | 108 | """Hijack the gtk mainloop so a user calling it won't cause badness.""" |
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93 | 109 | import gtk |
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94 | 110 | orig_mainloop = gtk.main |
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95 |
gtk.mainloop = _ |
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96 |
gtk.main = _ |
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111 | gtk.mainloop = _DummyMainloop | |
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112 | gtk.main = _DummyMainloop | |
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97 | 113 | return orig_mainloop |
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98 | 114 | |
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99 | 115 | def _hijack_tk(self): |
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100 | 116 | """Hijack the tk mainloop so a user calling it won't cause badness.""" |
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101 | 117 | import Tkinter |
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102 |
Tkinter.Misc.mainloop = _ |
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103 |
Tkinter.mainloop = _ |
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118 | Tkinter.Misc.mainloop = _DummyMainloop | |
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119 | Tkinter.mainloop = _DummyMainloop | |
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104 | 120 | |
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105 | 121 | def get_pyos_inputhook(self): |
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106 | 122 | """Return the current PyOS_InputHook as a ctypes.c_void_p.""" |
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107 | 123 | return ctypes.c_void_p.in_dll(ctypes.pythonapi,"PyOS_InputHook") |
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108 | 124 | |
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109 | 125 | def get_pyos_inputhook_as_func(self): |
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110 | 126 | """Return the current PyOS_InputHook as a ctypes.PYFUNCYPE.""" |
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111 | 127 | return self.PYFUNC.in_dll(ctypes.pythonapi,"PyOS_InputHook") |
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112 | 128 | |
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113 | 129 | def set_inputhook(self, callback): |
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114 | 130 | """Set PyOS_InputHook to callback and return the previous one.""" |
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115 | 131 | self._callback = callback |
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116 | 132 | self._callback_pyfunctype = self.PYFUNC(callback) |
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117 | 133 | pyos_inputhook_ptr = self.get_pyos_inputhook() |
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118 | 134 | original = self.get_pyos_inputhook_as_func() |
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119 | 135 | pyos_inputhook_ptr.value = \ |
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120 | 136 | ctypes.cast(self._callback_pyfunctype, ctypes.c_void_p).value |
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121 | 137 | self._installed = True |
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122 | 138 | return original |
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123 | 139 | |
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124 | 140 | def clear_inputhook(self): |
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125 | 141 | """Set PyOS_InputHook to NULL and return the previous one.""" |
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126 | 142 | pyos_inputhook_ptr = self.get_pyos_inputhook() |
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127 | 143 | original = self.get_pyos_inputhook_as_func() |
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128 | 144 | pyos_inputhook_ptr.value = ctypes.c_void_p(None).value |
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129 | 145 | self._reset() |
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130 | 146 | return original |
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131 | 147 | |
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132 | 148 | def clear_app_refs(self, gui=None): |
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133 | 149 | """Clear IPython's internal reference to an application instance. |
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134 | 150 | |
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135 | 151 | Whenever we create an app for a user on qt4 or wx, we hold a |
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136 | 152 | reference to the app. This is needed because in some cases bad things |
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137 | 153 | can happen if a user doesn't hold a reference themselves. This |
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138 | 154 | method is provided to clear the references we are holding. |
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139 | 155 | |
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140 | 156 | Parameters |
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141 | 157 | ---------- |
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142 | 158 | gui : None or str |
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143 | 159 | If None, clear all app references. If ('wx', 'qt4') clear |
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144 | 160 | the app for that toolkit. References are not held for gtk or tk |
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145 | 161 | as those toolkits don't have the notion of an app. |
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146 | 162 | """ |
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147 | 163 | if gui is None: |
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148 | 164 | self._apps = {} |
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149 | 165 | elif self._apps.has_key(gui): |
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150 | 166 | del self._apps[gui] |
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151 | 167 | |
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152 | 168 | def enable_wx(self, app=False): |
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153 | 169 | """Enable event loop integration with wxPython. |
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154 | 170 | |
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155 | 171 | Parameters |
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156 | 172 | ---------- |
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157 | 173 | app : bool |
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158 | 174 | Create a running application object or not. |
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159 | 175 | |
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160 | 176 | Notes |
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161 | 177 | ----- |
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162 | 178 | This methods sets the ``PyOS_InputHook`` for wxPython, which allows |
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163 | 179 | the wxPython to integrate with terminal based applications like |
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164 | 180 | IPython. |
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165 | 181 | |
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166 | 182 | If ``app`` is True, we create an :class:`wx.App` as follows:: |
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167 | 183 | |
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168 | 184 | import wx |
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169 | 185 | app = wx.App(redirect=False, clearSigInt=False) |
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170 | 186 | |
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171 | 187 | Both options this constructor are important for things to work |
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172 | 188 | properly in an interactive context. |
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173 | 189 | |
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174 | 190 | But, we first check to see if an application has already been |
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175 | 191 | created. If so, we simply return that instance. |
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176 | 192 | """ |
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177 | 193 | from IPython.lib.inputhookwx import inputhook_wx |
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178 | 194 | self.set_inputhook(inputhook_wx) |
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179 | 195 | self._current_gui = 'wx' |
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180 | 196 | self._hijack_wx() |
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181 | 197 | if app: |
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182 | 198 | import wx |
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183 | 199 | app = wx.GetApp() |
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184 | 200 | if app is None: |
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185 | 201 | app = wx.App(redirect=False, clearSigInt=False) |
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186 | 202 | self._apps['wx'] = app |
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187 | 203 | return app |
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188 | 204 | |
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189 | 205 | def disable_wx(self): |
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190 | 206 | """Disable event loop integration with wxPython. |
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191 | 207 | |
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192 | 208 | This merely sets PyOS_InputHook to NULL. |
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193 | 209 | """ |
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194 | 210 | self.clear_inputhook() |
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195 | 211 | |
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196 | 212 | def enable_qt4(self, app=False): |
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197 | 213 | """Enable event loop integration with PyQt4. |
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198 | 214 | |
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199 | 215 | Parameters |
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200 | 216 | ---------- |
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201 | 217 | app : bool |
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202 | 218 | Create a running application object or not. |
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203 | 219 | |
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204 | 220 | Notes |
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205 | 221 | ----- |
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206 | 222 | This methods sets the PyOS_InputHook for PyQt4, which allows |
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207 | 223 | the PyQt4 to integrate with terminal based applications like |
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208 | 224 | IPython. |
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209 | 225 | |
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210 | 226 | If ``app`` is True, we create an :class:`QApplication` as follows:: |
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211 | 227 | |
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212 | 228 | from PyQt4 import QtCore |
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213 | 229 | app = QtGui.QApplication(sys.argv) |
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214 | 230 | |
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215 | 231 | But, we first check to see if an application has already been |
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216 | 232 | created. If so, we simply return that instance. |
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217 | 233 | """ |
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218 | 234 | from PyQt4 import QtCore |
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219 | 235 | # PyQt4 has had this since 4.3.1. In version 4.2, PyOS_InputHook |
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220 | 236 | # was set when QtCore was imported, but if it ever got removed, |
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221 | 237 | # you couldn't reset it. For earlier versions we can |
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222 | 238 | # probably implement a ctypes version. |
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223 | 239 | try: |
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224 | 240 | QtCore.pyqtRestoreInputHook() |
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225 | 241 | except AttributeError: |
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226 | 242 | pass |
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227 | 243 | self._current_gui = 'qt4' |
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228 | 244 | self._hijack_qt4() |
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229 | 245 | if app: |
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230 | 246 | from PyQt4 import QtGui |
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231 | 247 | app = QtCore.QCoreApplication.instance() |
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232 | 248 | if app is None: |
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233 | 249 | app = QtGui.QApplication(sys.argv) |
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234 | 250 | self._apps['qt4'] = app |
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235 | 251 | return app |
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236 | 252 | |
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237 | 253 | def disable_qt4(self): |
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238 | 254 | """Disable event loop integration with PyQt4. |
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239 | 255 | |
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240 | 256 | This merely sets PyOS_InputHook to NULL. |
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241 | 257 | """ |
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242 | 258 | self.clear_inputhook() |
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243 | 259 | |
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244 | 260 | def enable_gtk(self, app=False): |
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245 | 261 | """Enable event loop integration with PyGTK. |
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246 | 262 | |
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247 | 263 | Parameters |
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248 | 264 | ---------- |
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249 | 265 | app : bool |
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250 | 266 | Create a running application object or not. Because gtk does't |
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251 | 267 | have an app class, this does nothing. |
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252 | 268 | |
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253 | 269 | Notes |
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254 | 270 | ----- |
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255 | 271 | This methods sets the PyOS_InputHook for PyGTK, which allows |
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256 | 272 | the PyGTK to integrate with terminal based applications like |
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257 | 273 | IPython. |
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258 | 274 | """ |
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259 | 275 | import gtk |
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260 | 276 | try: |
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261 | 277 | gtk.set_interactive(True) |
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262 | 278 | self._current_gui = 'gtk' |
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263 | 279 | except AttributeError: |
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264 | 280 | # For older versions of gtk, use our own ctypes version |
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265 | 281 | from IPython.lib.inputhookgtk import inputhook_gtk |
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266 | 282 | self.set_inputhook(inputhook_gtk) |
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267 | 283 | self._current_gui = 'gtk' |
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268 | 284 | self._hijack_gtk() |
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269 | 285 | |
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270 | 286 | def disable_gtk(self): |
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271 | 287 | """Disable event loop integration with PyGTK. |
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272 | 288 | |
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273 | 289 | This merely sets PyOS_InputHook to NULL. |
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274 | 290 | """ |
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275 | 291 | self.clear_inputhook() |
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276 | 292 | |
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277 | 293 | def enable_tk(self, app=False): |
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278 | 294 | """Enable event loop integration with Tk. |
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279 | 295 | |
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280 | 296 | Parameters |
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281 | 297 | ---------- |
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282 | 298 | app : bool |
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283 | 299 | Create a running application object or not. |
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284 | 300 | |
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285 | 301 | Notes |
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286 | 302 | ----- |
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287 | 303 | Currently this is a no-op as creating a :class:`Tkinter.Tk` object |
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288 | 304 | sets ``PyOS_InputHook``. |
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289 | 305 | """ |
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290 | 306 | self._current_gui = 'tk' |
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291 | 307 | self._hijack_tk() |
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292 | 308 | |
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293 | 309 | def disable_tk(self): |
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294 | 310 | """Disable event loop integration with Tkinter. |
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295 | 311 | |
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296 | 312 | This merely sets PyOS_InputHook to NULL. |
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297 | 313 | """ |
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298 | 314 | self.clear_inputhook() |
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299 | 315 | |
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300 | 316 | def current_gui(self): |
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301 | 317 | """Return a string indicating the currently active GUI or None.""" |
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302 | 318 | return self._current_gui |
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303 | 319 | |
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304 | 320 | inputhook_manager = InputHookManager() |
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305 | 321 | |
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306 | 322 | enable_wx = inputhook_manager.enable_wx |
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307 | 323 | disable_wx = inputhook_manager.disable_wx |
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308 | 324 | enable_qt4 = inputhook_manager.enable_qt4 |
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309 | 325 | disable_qt4 = inputhook_manager.disable_qt4 |
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310 | 326 | enable_gtk = inputhook_manager.enable_gtk |
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311 | 327 | disable_gtk = inputhook_manager.disable_gtk |
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312 | 328 | enable_tk = inputhook_manager.enable_tk |
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313 | 329 | disable_tk = inputhook_manager.disable_tk |
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314 | 330 | clear_inputhook = inputhook_manager.clear_inputhook |
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315 | 331 | set_inputhook = inputhook_manager.set_inputhook |
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316 | 332 | current_gui = inputhook_manager.current_gui |
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317 | 333 | clear_app_refs = inputhook_manager.clear_app_refs |
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