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@@ -1,465 +1,464 b'' | |||
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1 | 1 | # coding: utf-8 |
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2 | 2 | """ |
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3 | 3 | Inputhook management for GUI event loop integration. |
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4 | 4 | """ |
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5 | 5 | |
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6 | 6 | #----------------------------------------------------------------------------- |
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7 | 7 | # Copyright (C) 2008-2009 The IPython Development Team |
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8 | 8 | # |
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9 | 9 | # Distributed under the terms of the BSD License. The full license is in |
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10 | 10 | # the file COPYING, distributed as part of this software. |
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11 | 11 | #----------------------------------------------------------------------------- |
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12 | 12 | |
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13 | 13 | #----------------------------------------------------------------------------- |
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14 | 14 | # Imports |
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15 | 15 | #----------------------------------------------------------------------------- |
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16 | 16 | |
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17 | 17 | import ctypes |
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18 | 18 | import os |
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19 | 19 | import sys |
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20 | 20 | import warnings |
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21 | if os.name == 'posix': | |
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22 | import select | |
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23 | elif sys.platform == 'win32': | |
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24 | import msvcrt | |
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25 | 21 | |
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26 | 22 | #----------------------------------------------------------------------------- |
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27 | 23 | # Constants |
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28 | 24 | #----------------------------------------------------------------------------- |
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29 | 25 | |
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30 | 26 | # Constants for identifying the GUI toolkits. |
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31 | 27 | GUI_WX = 'wx' |
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32 | 28 | GUI_QT = 'qt' |
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33 | 29 | GUI_QT4 = 'qt4' |
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34 | 30 | GUI_GTK = 'gtk' |
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35 | 31 | GUI_TK = 'tk' |
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36 | 32 | GUI_OSX = 'osx' |
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37 | 33 | GUI_GLUT = 'glut' |
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38 | 34 | GUI_PYGLET = 'pyglet' |
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39 | 35 | |
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40 | 36 | #----------------------------------------------------------------------------- |
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41 | 37 | # Utilities |
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42 | 38 | #----------------------------------------------------------------------------- |
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43 | 39 | |
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44 | 40 | def stdin_ready(): |
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45 | 41 | if os.name == 'posix': |
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42 | import select | |
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46 | 43 | infds, outfds, erfds = select.select([sys.stdin],[],[],0) |
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47 | 44 | if infds: |
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48 | 45 | return True |
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49 | 46 | else: |
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50 | 47 | return False |
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51 |
elif |
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48 | elif os.name == 'nt': | |
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49 | import msvcrt | |
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52 | 50 | return msvcrt.kbhit() |
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51 | return True # assume there's something so that we won't wait forever | |
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53 | 52 | |
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54 | 53 | |
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55 | 54 | #----------------------------------------------------------------------------- |
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56 | 55 | # Main InputHookManager class |
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57 | 56 | #----------------------------------------------------------------------------- |
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58 | 57 | |
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59 | 58 | |
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60 | 59 | class InputHookManager(object): |
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61 | 60 | """Manage PyOS_InputHook for different GUI toolkits. |
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62 | 61 | |
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63 | 62 | This class installs various hooks under ``PyOSInputHook`` to handle |
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64 | 63 | GUI event loop integration. |
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65 | 64 | """ |
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66 | 65 | |
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67 | 66 | def __init__(self): |
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68 | 67 | self.PYFUNC = ctypes.PYFUNCTYPE(ctypes.c_int) |
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69 | 68 | self._apps = {} |
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70 | 69 | self._reset() |
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71 | 70 | |
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72 | 71 | def _reset(self): |
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73 | 72 | self._callback_pyfunctype = None |
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74 | 73 | self._callback = None |
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75 | 74 | self._installed = False |
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76 | 75 | self._current_gui = None |
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77 | 76 | |
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78 | 77 | def get_pyos_inputhook(self): |
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79 | 78 | """Return the current PyOS_InputHook as a ctypes.c_void_p.""" |
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80 | 79 | return ctypes.c_void_p.in_dll(ctypes.pythonapi,"PyOS_InputHook") |
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81 | 80 | |
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82 | 81 | def get_pyos_inputhook_as_func(self): |
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83 | 82 | """Return the current PyOS_InputHook as a ctypes.PYFUNCYPE.""" |
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84 | 83 | return self.PYFUNC.in_dll(ctypes.pythonapi,"PyOS_InputHook") |
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85 | 84 | |
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86 | 85 | def set_inputhook(self, callback): |
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87 | 86 | """Set PyOS_InputHook to callback and return the previous one.""" |
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88 | 87 | self._callback = callback |
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89 | 88 | self._callback_pyfunctype = self.PYFUNC(callback) |
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90 | 89 | pyos_inputhook_ptr = self.get_pyos_inputhook() |
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91 | 90 | original = self.get_pyos_inputhook_as_func() |
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92 | 91 | pyos_inputhook_ptr.value = \ |
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93 | 92 | ctypes.cast(self._callback_pyfunctype, ctypes.c_void_p).value |
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94 | 93 | self._installed = True |
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95 | 94 | return original |
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96 | 95 | |
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97 | 96 | def clear_inputhook(self, app=None): |
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98 | 97 | """Set PyOS_InputHook to NULL and return the previous one. |
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99 | 98 | |
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100 | 99 | Parameters |
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101 | 100 | ---------- |
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102 | 101 | app : optional, ignored |
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103 | 102 | This parameter is allowed only so that clear_inputhook() can be |
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104 | 103 | called with a similar interface as all the ``enable_*`` methods. But |
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105 | 104 | the actual value of the parameter is ignored. This uniform interface |
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106 | 105 | makes it easier to have user-level entry points in the main IPython |
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107 | 106 | app like :meth:`enable_gui`.""" |
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108 | 107 | pyos_inputhook_ptr = self.get_pyos_inputhook() |
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109 | 108 | original = self.get_pyos_inputhook_as_func() |
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110 | 109 | pyos_inputhook_ptr.value = ctypes.c_void_p(None).value |
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111 | 110 | self._reset() |
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112 | 111 | return original |
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113 | 112 | |
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114 | 113 | def clear_app_refs(self, gui=None): |
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115 | 114 | """Clear IPython's internal reference to an application instance. |
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116 | 115 | |
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117 | 116 | Whenever we create an app for a user on qt4 or wx, we hold a |
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118 | 117 | reference to the app. This is needed because in some cases bad things |
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119 | 118 | can happen if a user doesn't hold a reference themselves. This |
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120 | 119 | method is provided to clear the references we are holding. |
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121 | 120 | |
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122 | 121 | Parameters |
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123 | 122 | ---------- |
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124 | 123 | gui : None or str |
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125 | 124 | If None, clear all app references. If ('wx', 'qt4') clear |
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126 | 125 | the app for that toolkit. References are not held for gtk or tk |
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127 | 126 | as those toolkits don't have the notion of an app. |
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128 | 127 | """ |
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129 | 128 | if gui is None: |
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130 | 129 | self._apps = {} |
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131 | 130 | elif self._apps.has_key(gui): |
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132 | 131 | del self._apps[gui] |
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133 | 132 | |
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134 | 133 | def enable_wx(self, app=None): |
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135 | 134 | """Enable event loop integration with wxPython. |
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136 | 135 | |
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137 | 136 | Parameters |
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138 | 137 | ---------- |
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139 | 138 | app : WX Application, optional. |
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140 | 139 | Running application to use. If not given, we probe WX for an |
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141 | 140 | existing application object, and create a new one if none is found. |
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142 | 141 | |
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143 | 142 | Notes |
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144 | 143 | ----- |
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145 | 144 | This methods sets the ``PyOS_InputHook`` for wxPython, which allows |
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146 | 145 | the wxPython to integrate with terminal based applications like |
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147 | 146 | IPython. |
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148 | 147 | |
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149 | 148 | If ``app`` is not given we probe for an existing one, and return it if |
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150 | 149 | found. If no existing app is found, we create an :class:`wx.App` as |
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151 | 150 | follows:: |
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152 | 151 | |
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153 | 152 | import wx |
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154 | 153 | app = wx.App(redirect=False, clearSigInt=False) |
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155 | 154 | """ |
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156 | 155 | from IPython.lib.inputhookwx import inputhook_wx |
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157 | 156 | self.set_inputhook(inputhook_wx) |
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158 | 157 | self._current_gui = GUI_WX |
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159 | 158 | import wx |
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160 | 159 | if app is None: |
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161 | 160 | app = wx.GetApp() |
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162 | 161 | if app is None: |
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163 | 162 | app = wx.App(redirect=False, clearSigInt=False) |
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164 | 163 | app._in_event_loop = True |
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165 | 164 | self._apps[GUI_WX] = app |
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166 | 165 | return app |
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167 | 166 | |
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168 | 167 | def disable_wx(self): |
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169 | 168 | """Disable event loop integration with wxPython. |
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170 | 169 | |
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171 | 170 | This merely sets PyOS_InputHook to NULL. |
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172 | 171 | """ |
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173 | 172 | if self._apps.has_key(GUI_WX): |
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174 | 173 | self._apps[GUI_WX]._in_event_loop = False |
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175 | 174 | self.clear_inputhook() |
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176 | 175 | |
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177 | 176 | def enable_qt4(self, app=None): |
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178 | 177 | """Enable event loop integration with PyQt4. |
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179 | 178 | |
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180 | 179 | Parameters |
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181 | 180 | ---------- |
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182 | 181 | app : Qt Application, optional. |
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183 | 182 | Running application to use. If not given, we probe Qt for an |
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184 | 183 | existing application object, and create a new one if none is found. |
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185 | 184 | |
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186 | 185 | Notes |
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187 | 186 | ----- |
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188 | 187 | This methods sets the PyOS_InputHook for PyQt4, which allows |
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189 | 188 | the PyQt4 to integrate with terminal based applications like |
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190 | 189 | IPython. |
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191 | 190 | |
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192 | 191 | If ``app`` is not given we probe for an existing one, and return it if |
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193 | 192 | found. If no existing app is found, we create an :class:`QApplication` |
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194 | 193 | as follows:: |
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195 | 194 | |
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196 | 195 | from PyQt4 import QtCore |
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197 | 196 | app = QtGui.QApplication(sys.argv) |
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198 | 197 | """ |
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199 | 198 | from IPython.external.qt_for_kernel import QtCore, QtGui |
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200 | 199 | |
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201 | 200 | if 'pyreadline' in sys.modules: |
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202 | 201 | # see IPython GitHub Issue #281 for more info on this issue |
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203 | 202 | # Similar intermittent behavior has been reported on OSX, |
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204 | 203 | # but not consistently reproducible |
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205 | 204 | warnings.warn("""PyReadline's inputhook can conflict with Qt, causing delays |
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206 | 205 | in interactive input. If you do see this issue, we recommend using another GUI |
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207 | 206 | toolkit if you can, or disable readline with the configuration option |
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208 | 207 | 'TerminalInteractiveShell.readline_use=False', specified in a config file or |
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209 | 208 | at the command-line""", |
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210 | 209 | RuntimeWarning) |
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211 | 210 | |
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212 | 211 | # PyQt4 has had this since 4.3.1. In version 4.2, PyOS_InputHook |
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213 | 212 | # was set when QtCore was imported, but if it ever got removed, |
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214 | 213 | # you couldn't reset it. For earlier versions we can |
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215 | 214 | # probably implement a ctypes version. |
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216 | 215 | try: |
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217 | 216 | QtCore.pyqtRestoreInputHook() |
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218 | 217 | except AttributeError: |
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219 | 218 | pass |
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220 | 219 | |
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221 | 220 | self._current_gui = GUI_QT4 |
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222 | 221 | if app is None: |
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223 | 222 | app = QtCore.QCoreApplication.instance() |
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224 | 223 | if app is None: |
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225 | 224 | app = QtGui.QApplication([" "]) |
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226 | 225 | app._in_event_loop = True |
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227 | 226 | self._apps[GUI_QT4] = app |
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228 | 227 | return app |
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229 | 228 | |
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230 | 229 | def disable_qt4(self): |
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231 | 230 | """Disable event loop integration with PyQt4. |
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232 | 231 | |
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233 | 232 | This merely sets PyOS_InputHook to NULL. |
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234 | 233 | """ |
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235 | 234 | if self._apps.has_key(GUI_QT4): |
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236 | 235 | self._apps[GUI_QT4]._in_event_loop = False |
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237 | 236 | self.clear_inputhook() |
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238 | 237 | |
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239 | 238 | def enable_gtk(self, app=None): |
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240 | 239 | """Enable event loop integration with PyGTK. |
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241 | 240 | |
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242 | 241 | Parameters |
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243 | 242 | ---------- |
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244 | 243 | app : ignored |
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245 | 244 | Ignored, it's only a placeholder to keep the call signature of all |
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246 | 245 | gui activation methods consistent, which simplifies the logic of |
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247 | 246 | supporting magics. |
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248 | 247 | |
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249 | 248 | Notes |
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250 | 249 | ----- |
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251 | 250 | This methods sets the PyOS_InputHook for PyGTK, which allows |
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252 | 251 | the PyGTK to integrate with terminal based applications like |
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253 | 252 | IPython. |
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254 | 253 | """ |
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255 | 254 | import gtk |
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256 | 255 | try: |
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257 | 256 | gtk.set_interactive(True) |
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258 | 257 | self._current_gui = GUI_GTK |
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259 | 258 | except AttributeError: |
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260 | 259 | # For older versions of gtk, use our own ctypes version |
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261 | 260 | from IPython.lib.inputhookgtk import inputhook_gtk |
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262 | 261 | self.set_inputhook(inputhook_gtk) |
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263 | 262 | self._current_gui = GUI_GTK |
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264 | 263 | |
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265 | 264 | def disable_gtk(self): |
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266 | 265 | """Disable event loop integration with PyGTK. |
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267 | 266 | |
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268 | 267 | This merely sets PyOS_InputHook to NULL. |
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269 | 268 | """ |
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270 | 269 | self.clear_inputhook() |
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271 | 270 | |
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272 | 271 | def enable_tk(self, app=None): |
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273 | 272 | """Enable event loop integration with Tk. |
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274 | 273 | |
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275 | 274 | Parameters |
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276 | 275 | ---------- |
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277 | 276 | app : toplevel :class:`Tkinter.Tk` widget, optional. |
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278 | 277 | Running toplevel widget to use. If not given, we probe Tk for an |
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279 | 278 | existing one, and create a new one if none is found. |
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280 | 279 | |
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281 | 280 | Notes |
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282 | 281 | ----- |
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283 | 282 | If you have already created a :class:`Tkinter.Tk` object, the only |
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284 | 283 | thing done by this method is to register with the |
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285 | 284 | :class:`InputHookManager`, since creating that object automatically |
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286 | 285 | sets ``PyOS_InputHook``. |
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287 | 286 | """ |
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288 | 287 | self._current_gui = GUI_TK |
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289 | 288 | if app is None: |
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290 | 289 | import Tkinter |
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291 | 290 | app = Tkinter.Tk() |
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292 | 291 | app.withdraw() |
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293 | 292 | self._apps[GUI_TK] = app |
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294 | 293 | return app |
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295 | 294 | |
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296 | 295 | def disable_tk(self): |
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297 | 296 | """Disable event loop integration with Tkinter. |
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298 | 297 | |
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299 | 298 | This merely sets PyOS_InputHook to NULL. |
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300 | 299 | """ |
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301 | 300 | self.clear_inputhook() |
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302 | 301 | |
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303 | 302 | |
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304 | 303 | def enable_glut(self, app=None): |
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305 | 304 | """ Enable event loop integration with GLUT. |
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306 | 305 | |
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307 | 306 | Parameters |
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308 | 307 | ---------- |
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309 | 308 | |
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310 | 309 | app : ignored |
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311 | 310 | Ignored, it's only a placeholder to keep the call signature of all |
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312 | 311 | gui activation methods consistent, which simplifies the logic of |
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313 | 312 | supporting magics. |
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314 | 313 | |
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315 | 314 | Notes |
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316 | 315 | ----- |
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317 | 316 | |
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318 | 317 | This methods sets the PyOS_InputHook for GLUT, which allows the GLUT to |
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319 | 318 | integrate with terminal based applications like IPython. Due to GLUT |
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320 | 319 | limitations, it is currently not possible to start the event loop |
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321 | 320 | without first creating a window. You should thus not create another |
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322 | 321 | window but use instead the created one. See 'gui-glut.py' in the |
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323 | 322 | docs/examples/lib directory. |
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324 | 323 | |
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325 | 324 | The default screen mode is set to: |
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326 | 325 | glut.GLUT_DOUBLE | glut.GLUT_RGBA | glut.GLUT_DEPTH |
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327 | 326 | """ |
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328 | 327 | |
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329 | 328 | import OpenGL.GLUT as glut |
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330 | 329 | from IPython.lib.inputhookglut import glut_display_mode, \ |
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331 | 330 | glut_close, glut_display, \ |
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332 | 331 | glut_idle, inputhook_glut |
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333 | 332 | |
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334 | 333 | if not self._apps.has_key( GUI_GLUT ): |
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335 | 334 | glut.glutInit( sys.argv ) |
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336 | 335 | glut.glutInitDisplayMode( glut_display_mode ) |
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337 | 336 | # This is specific to freeglut |
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338 | 337 | if bool(glut.glutSetOption): |
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339 | 338 | glut.glutSetOption( glut.GLUT_ACTION_ON_WINDOW_CLOSE, |
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340 | 339 | glut.GLUT_ACTION_GLUTMAINLOOP_RETURNS ) |
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341 | 340 | glut.glutCreateWindow( sys.argv[0] ) |
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342 | 341 | glut.glutReshapeWindow( 1, 1 ) |
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343 | 342 | glut.glutHideWindow( ) |
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344 | 343 | glut.glutWMCloseFunc( glut_close ) |
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345 | 344 | glut.glutDisplayFunc( glut_display ) |
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346 | 345 | glut.glutIdleFunc( glut_idle ) |
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347 | 346 | else: |
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348 | 347 | glut.glutWMCloseFunc( glut_close ) |
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349 | 348 | glut.glutDisplayFunc( glut_display ) |
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350 | 349 | glut.glutIdleFunc( glut_idle) |
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351 | 350 | self.set_inputhook( inputhook_glut ) |
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352 | 351 | self._current_gui = GUI_GLUT |
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353 | 352 | self._apps[GUI_GLUT] = True |
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354 | 353 | |
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355 | 354 | |
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356 | 355 | def disable_glut(self): |
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357 | 356 | """Disable event loop integration with glut. |
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358 | 357 | |
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359 | 358 | This sets PyOS_InputHook to NULL and set the display function to a |
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360 | 359 | dummy one and set the timer to a dummy timer that will be triggered |
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361 | 360 | very far in the future. |
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362 | 361 | """ |
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363 | 362 | import OpenGL.GLUT as glut |
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364 | 363 | from glut_support import glutMainLoopEvent |
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365 | 364 | |
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366 | 365 | glut.glutHideWindow() # This is an event to be processed below |
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367 | 366 | glutMainLoopEvent() |
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368 | 367 | self.clear_inputhook() |
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369 | 368 | |
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370 | 369 | def enable_pyglet(self, app=None): |
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371 | 370 | """Enable event loop integration with pyglet. |
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372 | 371 | |
|
373 | 372 | Parameters |
|
374 | 373 | ---------- |
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375 | 374 | app : ignored |
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376 | 375 | Ignored, it's only a placeholder to keep the call signature of all |
|
377 | 376 | gui activation methods consistent, which simplifies the logic of |
|
378 | 377 | supporting magics. |
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379 | 378 | |
|
380 | 379 | Notes |
|
381 | 380 | ----- |
|
382 | 381 | This methods sets the ``PyOS_InputHook`` for pyglet, which allows |
|
383 | 382 | pyglet to integrate with terminal based applications like |
|
384 | 383 | IPython. |
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385 | 384 | |
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386 | 385 | """ |
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387 | 386 | import pyglet |
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388 | 387 | from IPython.lib.inputhookpyglet import inputhook_pyglet |
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389 | 388 | self.set_inputhook(inputhook_pyglet) |
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390 | 389 | self._current_gui = GUI_PYGLET |
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391 | 390 | return app |
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392 | 391 | |
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393 | 392 | def disable_pyglet(self): |
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394 | 393 | """Disable event loop integration with pyglet. |
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395 | 394 | |
|
396 | 395 | This merely sets PyOS_InputHook to NULL. |
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397 | 396 | """ |
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398 | 397 | self.clear_inputhook() |
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399 | 398 | |
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400 | 399 | def current_gui(self): |
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401 | 400 | """Return a string indicating the currently active GUI or None.""" |
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402 | 401 | return self._current_gui |
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403 | 402 | |
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404 | 403 | inputhook_manager = InputHookManager() |
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405 | 404 | |
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406 | 405 | enable_wx = inputhook_manager.enable_wx |
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407 | 406 | disable_wx = inputhook_manager.disable_wx |
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408 | 407 | enable_qt4 = inputhook_manager.enable_qt4 |
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409 | 408 | disable_qt4 = inputhook_manager.disable_qt4 |
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410 | 409 | enable_gtk = inputhook_manager.enable_gtk |
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411 | 410 | disable_gtk = inputhook_manager.disable_gtk |
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412 | 411 | enable_tk = inputhook_manager.enable_tk |
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413 | 412 | disable_tk = inputhook_manager.disable_tk |
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414 | 413 | enable_glut = inputhook_manager.enable_glut |
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415 | 414 | disable_glut = inputhook_manager.disable_glut |
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416 | 415 | enable_pyglet = inputhook_manager.enable_pyglet |
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417 | 416 | disable_pyglet = inputhook_manager.disable_pyglet |
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418 | 417 | clear_inputhook = inputhook_manager.clear_inputhook |
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419 | 418 | set_inputhook = inputhook_manager.set_inputhook |
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420 | 419 | current_gui = inputhook_manager.current_gui |
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421 | 420 | clear_app_refs = inputhook_manager.clear_app_refs |
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422 | 421 | |
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423 | 422 | |
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424 | 423 | # Convenience function to switch amongst them |
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425 | 424 | def enable_gui(gui=None, app=None): |
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426 | 425 | """Switch amongst GUI input hooks by name. |
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427 | 426 | |
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428 | 427 | This is just a utility wrapper around the methods of the InputHookManager |
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429 | 428 | object. |
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430 | 429 | |
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431 | 430 | Parameters |
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432 | 431 | ---------- |
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433 | 432 | gui : optional, string or None |
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434 | 433 | If None, clears input hook, otherwise it must be one of the recognized |
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435 | 434 | GUI names (see ``GUI_*`` constants in module). |
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436 | 435 | |
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437 | 436 | app : optional, existing application object. |
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438 | 437 | For toolkits that have the concept of a global app, you can supply an |
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439 | 438 | existing one. If not given, the toolkit will be probed for one, and if |
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440 | 439 | none is found, a new one will be created. Note that GTK does not have |
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441 | 440 | this concept, and passing an app if `gui`=="GTK" will raise an error. |
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442 | 441 | |
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443 | 442 | Returns |
|
444 | 443 | ------- |
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445 | 444 | The output of the underlying gui switch routine, typically the actual |
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446 | 445 | PyOS_InputHook wrapper object or the GUI toolkit app created, if there was |
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447 | 446 | one. |
|
448 | 447 | """ |
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449 | 448 | guis = {None: clear_inputhook, |
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450 | 449 | GUI_OSX: lambda app=False: None, |
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451 | 450 | GUI_TK: enable_tk, |
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452 | 451 | GUI_GTK: enable_gtk, |
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453 | 452 | GUI_WX: enable_wx, |
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454 | 453 | GUI_QT: enable_qt4, # qt3 not supported |
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455 | 454 | GUI_QT4: enable_qt4, |
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456 | 455 | GUI_GLUT: enable_glut, |
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457 | 456 | GUI_PYGLET: enable_pyglet, |
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458 | 457 | } |
|
459 | 458 | try: |
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460 | 459 | gui_hook = guis[gui] |
|
461 | 460 | except KeyError: |
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462 | 461 | e = "Invalid GUI request %r, valid ones are:%s" % (gui, guis.keys()) |
|
463 | 462 | raise ValueError(e) |
|
464 | 463 | return gui_hook(app) |
|
465 | 464 |
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