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annotate frontends/src/quick_frontend/quick_widgets.py @ 1975:da6d1988dfcb

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merged main branch
author Goffi <goffi@goffi.org>
date Mon, 27 Jun 2016 22:49:36 +0200
parents 633b5c21aefd
children b5ef9b2b995e
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1 #!/usr/bin/env python2
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2 # -*- coding: utf-8 -*-
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3
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4 # helper class for making a SAT frontend
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5 # Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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20 from sat.core.log import getLogger
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21 log = getLogger(__name__)
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22 from sat.core import exceptions
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23
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24 from sat_frontends.quick_frontend.constants import Const as C
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26 classes_map = {}
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29 try:
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30 # FIXME: to be removed when an acceptable solution is here
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31 unicode('') # XXX: unicode doesn't exist in pyjamas
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32 except (TypeError, AttributeError): # Error raised is not the same depending on pyjsbuild options
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33 unicode = str
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34
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36 def register(base_cls, child_cls=None):
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37 """Register a child class to use by default when a base class is needed
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39 @param base_cls: "Quick..." base class (like QuickChat or QuickContact), must inherit from QuickWidget
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40 @param child_cls: inherited class to use when Quick... class is requested, must inherit from base_cls.
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41 Can be None if it's the base_cls itself which register
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42 """
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43 # FIXME: we use base_cls.__name__ instead of base_cls directly because pyjamas because
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44 # in the second case
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45 classes_map[base_cls.__name__] = child_cls
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48 class WidgetAlreadyExistsError(Exception):
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49 pass
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52 class QuickWidgetsManager(object):
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53 """This class is used to manage all the widgets of a frontend
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54 A widget can be a window, a graphical thing, or someting else depending of the frontend"""
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55
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56 def __init__(self, host):
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57 self.host = host
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58 self._widgets = {}
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59
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60 def __iter__(self):
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61 """Iterate throught all widgets"""
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62 for widget_map in self._widgets.itervalues():
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63 for widget in widget_map.itervalues():
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64 yield widget
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66 def getRealClass(self, class_):
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67 """Return class registered for given class_
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68
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69 @param class_: subclass of QuickWidget
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70 @return: class actually used to create widget
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71 """
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72 try:
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73 # FIXME: we use base_cls.__name__ instead of base_cls directly because pyjamas bugs
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74 # in the second case
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75 cls = classes_map[class_.__name__]
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76 except KeyError:
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77 cls = class_
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78 if cls is None:
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79 raise exceptions.InternalError("There is not class registered for {}".format(class_))
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80 return cls
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81
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82 def getWidgets(self, class_):
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83 """Get all subclassed widgets
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84
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85 @param class_: subclass of QuickWidget, same parameter as used in [getOrCreateWidget]
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86 @return: iterator on widgets
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87 """
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88 class_ = self.getRealClass(class_)
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89 try:
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90 widgets_map = self._widgets[class_.__name__]
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91 except KeyError:
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92 return iter([])
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93 else:
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94 return widgets_map.itervalues()
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95
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96 def getWidget(self, class_, target=None, profiles=None):
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97 """Get a widget without creating it if it doesn't exist.
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98
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99 @param class_(class): class of the widget to create
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100 @param target: target depending of the widget, usually a JID instance
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101 @param profiles (unicode, iterable[unicode], None): profile(s) to use (may or may not be
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102 used, depending of the widget class)
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103 @return: a class_ instance or None if the widget doesn't exist
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104 """
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105 assert (target is not None) or (profiles is not None)
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106 if profiles is not None and isinstance(profiles, unicode):
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107 profiles = [profiles]
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108 class_ = self.getRealClass(class_)
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109 hash_ = class_.getWidgetHash(target, profiles)
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110 try:
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111 return self._widgets[class_.__name__][hash_]
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112 except KeyError:
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113 return None
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114
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parents: 1139
diff changeset
115 def getOrCreateWidget(self, class_, target, *args, **kwargs):
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
116 """Get an existing widget or create a new one when necessary
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parents: 1139
diff changeset
117
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parents: 1139
diff changeset
118 If the widget is new, self.host.newWidget will be called with it.
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
119 @param class_(class): class of the widget to create
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parents: 1139
diff changeset
120 @param target: target depending of the widget, usually a JID instance
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parents: 1139
diff changeset
121 @param args(list): optional args to create a new instance of class_
1312
9e904f8a094e quick_frontend: getOrCreateWidget callbacks can return another widget
souliane <souliane@mailoo.org>
parents: 1310
diff changeset
122 @param kwargs(dict): optional kwargs to create a new instance of class_
1265
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parents: 1139
diff changeset
123 if 'profile' key is present, it will be popped and put in 'profiles'
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
124 if there is neither 'profile' nor 'profiles', None will be used for 'profiles'
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
125 if 'on_new_widget' is present it can have the following values:
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
126 C.WIDGET_NEW [default]: self.host.newWidget will be called on widget creation
1322
1f13a837e4b2 quick_frontend (quick_widgets): revert commit 1319
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parents: 1321
diff changeset
127 [callable]: this method will be called instead of self.host.newWidget
1265
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parents: 1139
diff changeset
128 None: do nothing
1301
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parents: 1290
diff changeset
129 if 'on_existing_widget' is present it can have the following values:
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parents: 1290
diff changeset
130 C.WIDGET_KEEP [default]: return the existing widget
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
131 C.WIDGET_RAISE: raise WidgetAlreadyExistsError
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
132 C.WIDGET_RECREATE: create a new widget *WITH A NEW HASH*
1322
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souliane <souliane@mailoo.org>
parents: 1321
diff changeset
133 [callable]: this method will be called with existing widget as argument
1265
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parents: 1139
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134 if 'force_hash' is present, the hash given in value will be used instead of the one returned by class_.getWidgetHash
1307
9512590dc3d7 quick_ frontend (quick widgets): added explanation in docstring for non special keywords in getOrCreateWidget
Goffi <goffi@goffi.org>
parents: 1304
diff changeset
135 other keys will be used to instanciate class_ if the case happen (e.g. if type_ is present and class_ is a QuickChat subclass,
9512590dc3d7 quick_ frontend (quick widgets): added explanation in docstring for non special keywords in getOrCreateWidget
Goffi <goffi@goffi.org>
parents: 1304
diff changeset
136 it will be used to create a new QuickChat instance).
1265
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parents: 1139
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137 @return: a class_ instance, either new or already existing
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parents: 1139
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138 """
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parents: 1265
diff changeset
139 cls = self.getRealClass(class_)
1265
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parents: 1139
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140
1301
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parents: 1290
diff changeset
141 ## arguments management ##
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parents: 1139
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142 _args = [self.host, target] + list(args) or [] # FIXME: check if it's really necessary to use optional args
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parents: 1139
diff changeset
143 _kwargs = kwargs or {}
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parents: 1139
diff changeset
144 if 'profiles' in _kwargs and 'profile' in _kwargs:
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parents: 1139
diff changeset
145 raise ValueError("You can't have 'profile' and 'profiles' keys at the same time")
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
146 try:
1938
011eff37e21d quick frontend, primitivus: quickContactList refactored to handle several profiles at once
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
147 _kwargs['profiles'] = [_kwargs.pop('profile')]
1265
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parents: 1139
diff changeset
148 except KeyError:
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parents: 1139
diff changeset
149 if not 'profiles' in _kwargs:
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parents: 1139
diff changeset
150 _kwargs['profiles'] = None
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parents: 1139
diff changeset
151
1301
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parents: 1290
diff changeset
152 #on_new_widget tell what to do for the new widget creation
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parents: 1290
diff changeset
153 try:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
154 on_new_widget = _kwargs.pop('on_new_widget')
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parents: 1290
diff changeset
155 except KeyError:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
156 on_new_widget = C.WIDGET_NEW
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parents: 1290
diff changeset
157
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parents: 1290
diff changeset
158 #on_existing_widget tell what to do when the widget already exists
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parents: 1290
diff changeset
159 try:
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
160 on_existing_widget = _kwargs.pop('on_existing_widget')
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parents: 1290
diff changeset
161 except KeyError:
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parents: 1290
diff changeset
162 on_existing_widget = C.WIDGET_KEEP
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parents: 1290
diff changeset
163
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parents: 1290
diff changeset
164 ## we get the hash ##
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parents: 1139
diff changeset
165 try:
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parents: 1139
diff changeset
166 hash_ = _kwargs.pop('force_hash')
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parents: 1139
diff changeset
167 except KeyError:
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parents: 1139
diff changeset
168 hash_ = cls.getWidgetHash(target, _kwargs['profiles'])
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parents: 1139
diff changeset
169
1304
1a61b18703c4 quick frontend (quick widgets): class' __name__ method is used for classes_map hash because the use of class directly was causing bugs with pyjamas (difficult to find, several MicroblogPanel instances were added only once in Libervia's TabPanel, hash method seemed buggy)
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parents: 1303
diff changeset
170 ## widget creation or retrieval ##
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Goffi <goffi@goffi.org>
parents: 1303
diff changeset
171
1a61b18703c4 quick frontend (quick widgets): class' __name__ method is used for classes_map hash because the use of class directly was causing bugs with pyjamas (difficult to find, several MicroblogPanel instances were added only once in Libervia's TabPanel, hash method seemed buggy)
Goffi <goffi@goffi.org>
parents: 1303
diff changeset
172 widgets_map = self._widgets.setdefault(cls.__name__, {}) # we sorts widgets by classes
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173 if not cls.SINGLE:
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parents: 1139
diff changeset
174 widget = None # if the class is not SINGLE, we always create a new widget
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parents: 1139
diff changeset
175 else:
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parents: 1139
diff changeset
176 try:
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parents: 1265
diff changeset
177 widget = widgets_map[hash_]
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parents: 1139
diff changeset
178 widget.addTarget(target)
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parents: 1139
diff changeset
179 except KeyError:
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parents: 1139
diff changeset
180 widget = None
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parents: 1139
diff changeset
181
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parents: 1139
diff changeset
182 if widget is None:
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parents: 1139
diff changeset
183 # we need to create a new widget
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parents: 1139
diff changeset
184 log.debug(u"Creating new widget for target {} {}".format(target, cls))
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parents: 1139
diff changeset
185 widget = cls(*_args, **_kwargs)
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parents: 1265
diff changeset
186 widgets_map[hash_] = widget
0
goffi@necton2
parents:
diff changeset
187
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
188 if on_new_widget == C.WIDGET_NEW:
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parents: 1139
diff changeset
189 self.host.newWidget(widget)
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parents: 1139
diff changeset
190 elif callable(on_new_widget):
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souliane <souliane@mailoo.org>
parents: 1321
diff changeset
191 on_new_widget(widget)
1265
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diff changeset
192 else:
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parents: 1139
diff changeset
193 assert on_new_widget is None
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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diff changeset
194 else:
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parents: 1290
diff changeset
195 # the widget already exists
1308
f079e6ed1e69 quick frontend(quick widgets): added the ability to use a callable with getOrCreateWidget's on_existing_widget
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parents: 1307
diff changeset
196 if on_existing_widget == C.WIDGET_KEEP:
f079e6ed1e69 quick frontend(quick widgets): added the ability to use a callable with getOrCreateWidget's on_existing_widget
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parents: 1307
diff changeset
197 pass
1309
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Goffi <goffi@goffi.org>
parents: 1308
diff changeset
198 elif on_existing_widget == C.WIDGET_RAISE:
1301
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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diff changeset
199 raise WidgetAlreadyExistsError(hash_)
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diff changeset
200 elif on_existing_widget == C.WIDGET_RECREATE:
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201 # we use getOrCreateWidget to recreate the new widget
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diff changeset
202 # /!\ we use args and kwargs and not _args and _kwargs because we need the original args
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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diff changeset
203 # we need to get rid of kwargs special options
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diff changeset
204 new_kwargs = kwargs.copy()
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parents: 1290
diff changeset
205 try:
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diff changeset
206 new_kwargs.pop('force_hash') # FIXME: we use pop instead of del here because pyjamas doesn't raise error on del
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parents: 1290
diff changeset
207 except KeyError:
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parents: 1290
diff changeset
208 pass
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
209 else:
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parents: 1290
diff changeset
210 raise ValueError("force_hash option can't be used with on_existing_widget=RECREATE")
1265
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diff changeset
211
1301
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
212 # XXX: keep up-to-date if new special kwargs are added (i.e.: delete these keys here)
afc57b34c0a3 Quick Frontend (quick_widgets): added on_existing_widget in getOrCreateWidget (see docstring for more infos) + use of constants
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parents: 1290
diff changeset
213 new_kwargs['on_existing_widget'] = C.WIDGET_RAISE
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parents: 1290
diff changeset
214 hash_idx = 1
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
215 while True:
1310
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souliane <souliane@mailoo.org>
parents: 1309
diff changeset
216 new_kwargs['force_hash'] = "{}_new_instance_{}".format(hash_, hash_idx)
1301
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parents: 1290
diff changeset
217 try:
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parents: 1290
diff changeset
218 widget = self.getOrCreateWidget(class_, target, *args, **new_kwargs)
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parents: 1290
diff changeset
219 except WidgetAlreadyExistsError:
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diff changeset
220 hash_idx += 1
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parents: 1290
diff changeset
221 else:
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diff changeset
222 log.debug(u"Widget already exists, a new one has been recreated with hash {}".format(new_kwargs['force_hash']))
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parents: 1290
diff changeset
223 break
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parents: 1307
diff changeset
224 elif callable(on_existing_widget):
1322
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souliane <souliane@mailoo.org>
parents: 1321
diff changeset
225 on_existing_widget(widget)
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diff changeset
226 else:
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diff changeset
227 raise exceptions.InternalError("Unexpected on_existing_widget value ({})".format(on_existing_widget))
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228
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229 return widget
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230
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231 def deleteWidget(self, widget_to_delete):
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232 """Delete a widget
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233
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parents: 1301
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234 widget's onDelete method will be called before deletion
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235 """
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parents: 1301
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236 widget_to_delete.onDelete()
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parents: 1301
diff changeset
237
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diff changeset
238 for widget_map in self._widgets.itervalues():
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souliane <souliane@mailoo.org>
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239 to_delete = set()
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Goffi <goffi@goffi.org>
parents: 1301
diff changeset
240 for hash_, widget in widget_map.iteritems():
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Goffi <goffi@goffi.org>
parents: 1301
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241 if widget_to_delete is widget:
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souliane <souliane@mailoo.org>
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242 to_delete.add(hash_)
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souliane <souliane@mailoo.org>
parents: 1396
diff changeset
243 for hash_ in to_delete:
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souliane <souliane@mailoo.org>
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244 del widget_map[hash_]
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245
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246
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diff changeset
247 class QuickWidget(object):
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248 """generic widget base"""
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249 SINGLE=True # if True, there can be only one widget per target(s)
1955
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parents: 1938
diff changeset
250 PROFILES_MULTIPLE=False # If True, this widget can handle several profiles at once
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parents: 1938
diff changeset
251 PROFILES_ALLOW_NONE=False # If True, this widget can be used without profile
0
goffi@necton2
parents:
diff changeset
252
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253 def __init__(self, host, target, profiles=None):
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254 """
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255 @param host: %(doc_host)s
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256 @param target: target specific for this widget class
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parents: 1139
diff changeset
257 @param profiles: can be either:
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parents: 1139
diff changeset
258 - (unicode): used when widget class manage a unique profile
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259 - (iterable): some widget class can manage several profiles, several at once can be specified here
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260 - None: no profile is managed by this widget class (rare)
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diff changeset
261 @raise: ValueError when (iterable) or None is given to profiles for a widget class which manage one unique profile.
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262 """
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263 self.host = host
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264 self.targets = set()
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265 self.addTarget(target)
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266 self.profiles = set()
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parents: 1139
diff changeset
267 if isinstance(profiles, basestring):
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diff changeset
268 self.addProfile(profiles)
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diff changeset
269 elif profiles is None:
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270 if not self.PROFILES_ALLOW_NONE:
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271 raise ValueError("profiles can't have a value of None")
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diff changeset
272 else:
1938
011eff37e21d quick frontend, primitivus: quickContactList refactored to handle several profiles at once
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
273 if not self.PROFILES_MULTIPLE and len(profiles) != 1:
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274 raise ValueError("multiple profiles are not allowed")
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diff changeset
275 for profile in profiles:
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diff changeset
276 self.addProfile(profile)
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diff changeset
277
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diff changeset
278 @property
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diff changeset
279 def profile(self):
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280 assert len(self.profiles) == 1 and not self.PROFILES_MULTIPLE and not self.PROFILES_ALLOW_NONE
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diff changeset
281 return list(self.profiles)[0]
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282
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diff changeset
283 def addTarget(self, target):
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284 """Add a target if it doesn't already exists
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285
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diff changeset
286 @param target: target to add
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287 """
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288 self.targets.add(target)
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289
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290 def addProfile(self, profile):
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291 """Add a profile is if doesn't already exists
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292
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293 @param profile: profile to add
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294 """
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295 if self.profiles and not self.PROFILES_MULTIPLE:
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296 raise ValueError("multiple profiles are not allowed")
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297 self.profiles.add(profile)
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298
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diff changeset
299 @staticmethod
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300 def getWidgetHash(target, profiles):
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301 """Return the hash associated with this target for this widget class
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302
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diff changeset
303 some widget classes can manage several target on the same instance
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diff changeset
304 (e.g.: a chat widget with multiple resources on the same bare jid),
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diff changeset
305 this method allow to return a hash associated to one or several targets
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diff changeset
306 to retrieve the good instance. For example, a widget managing JID targets,
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diff changeset
307 and all resource of the same bare jid would return the bare jid as hash.
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308
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diff changeset
309 @param target: target to check
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310 @param profiles: profile(s) associated to target, see __init__ docstring
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311 @return: a hash (can correspond to one or many targets or profiles, depending of widget class)
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312 """
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313 return unicode(target) # by defaut, there is one hash for one target
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314
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315 def onDelete(self):
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316 """Called when a widget is deleted"""
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317 log.debug(u"deleting widget {}".format(self)) # Must be implemented by frontends
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318 if self.host.selected_widget == self:
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319 self.host.selected_widget = None
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320