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annotate frontends/src/quick_frontend/quick_widgets.py @ 2027:666b42c957b5

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quick frontend (widget): minor profiles check on widget creation
author Goffi <goffi@goffi.org>
date Mon, 08 Aug 2016 00:49:17 +0200
parents 19b9d3f8a6c7
children 6353deb1bd73
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1934
2daf7b4c6756 use of /usr/bin/env instead of /usr/bin/python in shebang
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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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27
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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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35
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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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47
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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
2007
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82 def getWidgets(self, class_, profiles=None):
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83 """Get all subclassed widgets instances
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84
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85 @param class_: subclass of QuickWidget, same parameter as used in [getOrCreateWidget]
2007
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parents: 1995
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86 @param profiles(iterable, None): if not None, filter on instances linked to these profiles
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87 @return: iterator on widgets
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88 """
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89 class_ = self.getRealClass(class_)
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90 try:
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91 widgets_map = self._widgets[class_.__name__]
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92 except KeyError:
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93 return
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94 else:
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95 for w in widgets_map.itervalues():
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96 if profiles is None or w.profiles.intersection(profiles):
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97 yield w
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98
1938
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parents: 1934
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99 def getWidget(self, class_, target=None, profiles=None):
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100 """Get a widget without creating it if it doesn't exist.
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souliane <souliane@mailoo.org>
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101
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102 @param class_(class): class of the widget to create
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103 @param target: target depending of the widget, usually a JID instance
1938
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104 @param profiles (unicode, iterable[unicode], None): profile(s) to use (may or may not be
011eff37e21d quick frontend, primitivus: quickContactList refactored to handle several profiles at once
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105 used, depending of the widget class)
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106 @return: a class_ instance or None if the widget doesn't exist
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107 """
1938
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108 assert (target is not None) or (profiles is not None)
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109 if profiles is not None and isinstance(profiles, unicode):
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110 profiles = [profiles]
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111 class_ = self.getRealClass(class_)
1938
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112 hash_ = class_.getWidgetHash(target, profiles)
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113 try:
273b044fde6d quick_frontend: add a method getWidget to return a widget without creating it if it doesn't exist
souliane <souliane@mailoo.org>
parents: 1322
diff changeset
114 return self._widgets[class_.__name__][hash_]
273b044fde6d quick_frontend: add a method getWidget to return a widget without creating it if it doesn't exist
souliane <souliane@mailoo.org>
parents: 1322
diff changeset
115 except KeyError:
273b044fde6d quick_frontend: add a method getWidget to return a widget without creating it if it doesn't exist
souliane <souliane@mailoo.org>
parents: 1322
diff changeset
116 return None
273b044fde6d quick_frontend: add a method getWidget to return a widget without creating it if it doesn't exist
souliane <souliane@mailoo.org>
parents: 1322
diff changeset
117
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parents: 1139
diff changeset
118 def getOrCreateWidget(self, class_, target, *args, **kwargs):
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parents: 1139
diff changeset
119 """Get an existing widget or create a new one when necessary
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parents: 1139
diff changeset
120
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parents: 1139
diff changeset
121 If the widget is new, self.host.newWidget will be called with it.
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parents: 1139
diff changeset
122 @param class_(class): class of the widget to create
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parents: 1139
diff changeset
123 @param target: target depending of the widget, usually a JID instance
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
124 @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
125 @param kwargs(dict): optional kwargs to create a new instance of class_
1265
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parents: 1139
diff changeset
126 if 'profile' key is present, it will be popped and put in 'profiles'
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parents: 1139
diff changeset
127 if there is neither 'profile' nor 'profiles', None will be used for 'profiles'
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parents: 1139
diff changeset
128 if 'on_new_widget' is present it can have the following values:
1301
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
129 C.WIDGET_NEW [default]: self.host.newWidget will be called on widget creation
1322
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parents: 1321
diff changeset
130 [callable]: this method will be called instead of self.host.newWidget
1265
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parents: 1139
diff changeset
131 None: do nothing
1301
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
132 if 'on_existing_widget' is present it can have the following values:
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
133 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
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
134 C.WIDGET_RAISE: raise WidgetAlreadyExistsError
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
135 C.WIDGET_RECREATE: create a new widget *WITH A NEW HASH*
1322
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souliane <souliane@mailoo.org>
parents: 1321
diff changeset
136 [callable]: this method will be called with existing widget as argument
1265
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parents: 1139
diff changeset
137 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
138 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
139 it will be used to create a new QuickChat instance).
1265
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parents: 1139
diff changeset
140 @return: a class_ instance, either new or already existing
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diff changeset
141 """
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diff changeset
142 cls = self.getRealClass(class_)
1265
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diff changeset
143
1301
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
144 ## arguments management ##
1265
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diff changeset
145 _args = [self.host, target] + list(args) or [] # FIXME: check if it's really necessary to use optional args
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
146 _kwargs = kwargs or {}
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
147 if 'profiles' in _kwargs and 'profile' in _kwargs:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
148 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
149 try:
1938
011eff37e21d quick frontend, primitivus: quickContactList refactored to handle several profiles at once
Goffi <goffi@goffi.org>
parents: 1934
diff changeset
150 _kwargs['profiles'] = [_kwargs.pop('profile')]
1265
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parents: 1139
diff changeset
151 except KeyError:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
152 if not 'profiles' in _kwargs:
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parents: 1139
diff changeset
153 _kwargs['profiles'] = None
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diff changeset
154
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
155 #on_new_widget tell what to do for the new widget creation
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 try:
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
157 on_new_widget = _kwargs.pop('on_new_widget')
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parents: 1290
diff changeset
158 except KeyError:
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
159 on_new_widget = C.WIDGET_NEW
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
160
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
161 #on_existing_widget tell what to do when the widget already exists
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parents: 1290
diff changeset
162 try:
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
163 on_existing_widget = _kwargs.pop('on_existing_widget')
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parents: 1290
diff changeset
164 except KeyError:
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
165 on_existing_widget = C.WIDGET_KEEP
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parents: 1290
diff changeset
166
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
167 ## we get the hash ##
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diff changeset
168 try:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
169 hash_ = _kwargs.pop('force_hash')
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parents: 1139
diff changeset
170 except KeyError:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
171 hash_ = cls.getWidgetHash(target, _kwargs['profiles'])
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
172
1304
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Goffi <goffi@goffi.org>
parents: 1303
diff changeset
173 ## widget creation or retrieval ##
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Goffi <goffi@goffi.org>
parents: 1303
diff changeset
174
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
175 widgets_map = self._widgets.setdefault(cls.__name__, {}) # we sorts widgets by classes
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diff changeset
176 if not cls.SINGLE:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
177 widget = None # if the class is not SINGLE, we always create a new widget
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parents: 1139
diff changeset
178 else:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
179 try:
1290
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Goffi <goffi@goffi.org>
parents: 1265
diff changeset
180 widget = widgets_map[hash_]
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parents: 1139
diff changeset
181 widget.addTarget(target)
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parents: 1139
diff changeset
182 except KeyError:
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
183 widget = None
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parents: 1139
diff changeset
184
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
185 if widget is None:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
186 # we need to create a new widget
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
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parents: 1139
diff changeset
187 log.debug(u"Creating new widget for target {} {}".format(target, cls))
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
188 widget = cls(*_args, **_kwargs)
1290
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Goffi <goffi@goffi.org>
parents: 1265
diff changeset
189 widgets_map[hash_] = widget
0
goffi@necton2
parents:
diff changeset
190
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
191 if on_new_widget == C.WIDGET_NEW:
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parents: 1139
diff changeset
192 self.host.newWidget(widget)
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Goffi <goffi@goffi.org>
parents: 1139
diff changeset
193 elif callable(on_new_widget):
1322
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souliane <souliane@mailoo.org>
parents: 1321
diff changeset
194 on_new_widget(widget)
1265
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diff changeset
195 else:
e3a9ea76de35 quick_frontend, primitivus: multi-profiles refactoring part 1 (big commit, sorry :p):
Goffi <goffi@goffi.org>
parents: 1139
diff changeset
196 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
Goffi <goffi@goffi.org>
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diff changeset
197 else:
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
198 # the widget already exists
1308
f079e6ed1e69 quick frontend(quick widgets): added the ability to use a callable with getOrCreateWidget's on_existing_widget
Goffi <goffi@goffi.org>
parents: 1307
diff changeset
199 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
Goffi <goffi@goffi.org>
parents: 1307
diff changeset
200 pass
1309
d0d5ba3b4d64 quick frontend(quick widgets): fixed bad condition test in previous commit
Goffi <goffi@goffi.org>
parents: 1308
diff changeset
201 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
Goffi <goffi@goffi.org>
parents: 1290
diff changeset
202 raise WidgetAlreadyExistsError(hash_)
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
203 elif on_existing_widget == C.WIDGET_RECREATE:
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
204 # we use getOrCreateWidget to recreate the new widget
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diff changeset
205 # /!\ 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
206 # we need to get rid of kwargs special options
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parents: 1290
diff changeset
207 new_kwargs = kwargs.copy()
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
208 try:
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
209 new_kwargs.pop('force_hash') # FIXME: we use pop instead of del here because pyjamas doesn't raise error on del
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
210 except KeyError:
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
211 pass
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
212 else:
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Goffi <goffi@goffi.org>
parents: 1290
diff changeset
213 raise ValueError("force_hash option can't be used with on_existing_widget=RECREATE")
1265
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parents: 1139
diff changeset
214
1995
b5ef9b2b995e quick_frontend (QuickWidget): keep on_new_widget argument when recreating a widget
Goffi <goffi@goffi.org>
parents: 1955
diff changeset
215 new_kwargs['on_new_widget'] = on_new_widget
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216
1301
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diff changeset
217 # XXX: keep up-to-date if new special kwargs are added (i.e.: delete these keys here)
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diff changeset
218 new_kwargs['on_existing_widget'] = C.WIDGET_RAISE
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219 hash_idx = 1
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diff changeset
220 while True:
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221 new_kwargs['force_hash'] = "{}_new_instance_{}".format(hash_, hash_idx)
1301
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diff changeset
222 try:
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diff changeset
223 widget = self.getOrCreateWidget(class_, target, *args, **new_kwargs)
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224 except WidgetAlreadyExistsError:
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225 hash_idx += 1
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226 else:
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227 log.debug(u"Widget already exists, a new one has been recreated with hash {}".format(new_kwargs['force_hash']))
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diff changeset
228 break
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229 elif callable(on_existing_widget):
1322
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diff changeset
230 on_existing_widget(widget)
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231 else:
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232 raise exceptions.InternalError("Unexpected on_existing_widget value ({})".format(on_existing_widget))
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233
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234 return widget
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235
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236 def deleteWidget(self, widget_to_delete):
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237 """Delete a widget
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238
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239 widget's onDelete method will be called before deletion
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240 """
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241 widget_to_delete.onDelete()
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242
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243 for widget_map in self._widgets.itervalues():
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244 to_delete = set()
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245 for hash_, widget in widget_map.iteritems():
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246 if widget_to_delete is widget:
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247 to_delete.add(hash_)
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248 for hash_ in to_delete:
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249 del widget_map[hash_]
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250
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251
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252 class QuickWidget(object):
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253 """generic widget base"""
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254 SINGLE=True # if True, there can be only one widget per target(s)
1955
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diff changeset
255 PROFILES_MULTIPLE=False # If True, this widget can handle several profiles at once
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diff changeset
256 PROFILES_ALLOW_NONE=False # If True, this widget can be used without profile
0
goffi@necton2
parents:
diff changeset
257
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258 def __init__(self, host, target, profiles=None):
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259 """
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260 @param host: %(doc_host)s
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261 @param target: target specific for this widget class
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262 @param profiles: can be either:
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263 - (unicode): used when widget class manage a unique profile
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264 - (iterable): some widget class can manage several profiles, several at once can be specified here
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265 - None: no profile is managed by this widget class (rare)
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266 @raise: ValueError when (iterable) or None is given to profiles for a widget class which manage one unique profile.
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267 """
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268 self.host = host
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269 self.targets = set()
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270 self.addTarget(target)
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271 self.profiles = set()
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272 if isinstance(profiles, basestring):
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273 self.addProfile(profiles)
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274 elif profiles is None:
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275 if not self.PROFILES_ALLOW_NONE:
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276 raise ValueError("profiles can't have a value of None")
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277 else:
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278 for profile in profiles:
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279 self.addProfile(profile)
2027
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diff changeset
280 if not self.profiles:
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281 raise ValueError("no profile found, use None for no profile classes")
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282
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diff changeset
283 @property
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284 def profile(self):
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285 assert len(self.profiles) == 1 and not self.PROFILES_MULTIPLE and not self.PROFILES_ALLOW_NONE
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286 return list(self.profiles)[0]
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287
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288 def addTarget(self, target):
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289 """Add a target if it doesn't already exists
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290
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291 @param target: target to add
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292 """
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293 self.targets.add(target)
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294
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295 def addProfile(self, profile):
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296 """Add a profile is if doesn't already exists
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297
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diff changeset
298 @param profile: profile to add
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299 """
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300 if self.profiles and not self.PROFILES_MULTIPLE:
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301 raise ValueError("multiple profiles are not allowed")
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diff changeset
302 self.profiles.add(profile)
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303
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diff changeset
304 @staticmethod
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diff changeset
305 def getWidgetHash(target, profiles):
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306 """Return the hash associated with this target for this widget class
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307
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diff changeset
308 some widget classes can manage several target on the same instance
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diff changeset
309 (e.g.: a chat widget with multiple resources on the same bare jid),
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diff changeset
310 this method allow to return a hash associated to one or several targets
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diff changeset
311 to retrieve the good instance. For example, a widget managing JID targets,
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diff changeset
312 and all resource of the same bare jid would return the bare jid as hash.
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diff changeset
313
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diff changeset
314 @param target: target to check
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315 @param profiles: profile(s) associated to target, see __init__ docstring
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316 @return: a hash (can correspond to one or many targets or profiles, depending of widget class)
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317 """
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318 return unicode(target) # by defaut, there is one hash for one target
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319
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320 def onDelete(self):
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321 """Called when a widget is deleted"""
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322 log.debug(u"deleting widget {}".format(self)) # Must be implemented by frontends
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323 if self.host.selected_widget == self:
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324 self.host.selected_widget = None
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325