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@@ -32,10 +32,24 b' from IPython.utils.py3compat import string_types' | |||||
32 | #----------------------------------------------------------------------------- |
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32 | #----------------------------------------------------------------------------- | |
33 | class Widget(LoggingConfigurable): |
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33 | class Widget(LoggingConfigurable): | |
34 |
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34 | |||
35 | # Shared declarations |
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35 | # Shared declarations (Class level) | |
36 | _keys = [] |
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36 | _keys = [] | |
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37 | widget_construction_callback = None | |||
37 |
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38 | |||
38 | # Public declarations |
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39 | def on_widget_constructed(callback): | |
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40 | """Class method, registers a callback to be called when a widget is | |||
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41 | constructed. The callback must have the following signature: | |||
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42 | callback(widget)""" | |||
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43 | Widget.widget_construction_callback = callback | |||
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44 | ||||
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45 | def _handle_widget_constructed(widget): | |||
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46 | """Class method, called when a widget is constructed.""" | |||
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47 | if Widget.widget_construction_callback is not None and callable(Widget.widget_construction_callback): | |||
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48 | Widget.widget_construction_callback(widget) | |||
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49 | ||||
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50 | ||||
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51 | ||||
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52 | # Public declarations (Instance level) | |||
39 | target_name = Unicode('widget', help="""Name of the backbone model |
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53 | target_name = Unicode('widget', help="""Name of the backbone model | |
40 | registered in the frontend to create and sync this widget with.""") |
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54 | registered in the frontend to create and sync this widget with.""") | |
41 | default_view_name = Unicode(help="""Default view registered in the frontend |
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55 | default_view_name = Unicode(help="""Default view registered in the frontend | |
@@ -84,6 +98,8 b' class Widget(LoggingConfigurable):' | |||||
84 | # Register after init to allow default values to be specified |
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98 | # Register after init to allow default values to be specified | |
85 | self.on_trait_change(self._handle_property_changed, self.keys) |
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99 | self.on_trait_change(self._handle_property_changed, self.keys) | |
86 |
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100 | |||
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101 | Widget._handle_widget_constructed(self) | |||
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102 | ||||
87 |
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103 | |||
88 | def __del__(self): |
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104 | def __del__(self): | |
89 | """Object disposal""" |
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105 | """Object disposal""" |
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