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@@ -1,353 +1,356 b'' | |||||
1 | """Base Widget class. Allows user to create widgets in the backend that render |
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1 | """Base Widget class. Allows user to create widgets in the backend that render | |
2 | in the IPython notebook frontend. |
|
2 | in the IPython notebook frontend. | |
3 | """ |
|
3 | """ | |
4 | #----------------------------------------------------------------------------- |
|
4 | #----------------------------------------------------------------------------- | |
5 | # Copyright (c) 2013, the IPython Development Team. |
|
5 | # Copyright (c) 2013, the IPython Development Team. | |
6 | # |
|
6 | # | |
7 | # Distributed under the terms of the Modified BSD License. |
|
7 | # Distributed under the terms of the Modified BSD License. | |
8 | # |
|
8 | # | |
9 | # The full license is in the file COPYING.txt, distributed with this software. |
|
9 | # The full license is in the file COPYING.txt, distributed with this software. | |
10 | #----------------------------------------------------------------------------- |
|
10 | #----------------------------------------------------------------------------- | |
11 |
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11 | |||
12 | #----------------------------------------------------------------------------- |
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12 | #----------------------------------------------------------------------------- | |
13 | # Imports |
|
13 | # Imports | |
14 | #----------------------------------------------------------------------------- |
|
14 | #----------------------------------------------------------------------------- | |
15 | from copy import copy |
|
15 | from copy import copy | |
16 | from glob import glob |
|
16 | from glob import glob | |
17 | import uuid |
|
17 | import uuid | |
18 | import sys |
|
18 | import sys | |
19 | import os |
|
19 | import os | |
20 | import inspect |
|
20 | import inspect | |
21 | import types |
|
21 | import types | |
22 |
|
22 | |||
23 | import IPython |
|
23 | import IPython | |
24 | from IPython.kernel.comm import Comm |
|
24 | from IPython.kernel.comm import Comm | |
25 | from IPython.config import LoggingConfigurable |
|
25 | from IPython.config import LoggingConfigurable | |
26 | from IPython.utils.traitlets import Unicode, Dict, List, Instance, Bool |
|
26 | from IPython.utils.traitlets import Unicode, Dict, List, Instance, Bool | |
27 | from IPython.display import Javascript, display |
|
27 | from IPython.display import Javascript, display | |
28 | from IPython.utils.py3compat import string_types |
|
28 | from IPython.utils.py3compat import string_types | |
29 |
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29 | |||
30 |
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30 | |||
31 | #----------------------------------------------------------------------------- |
|
31 | #----------------------------------------------------------------------------- | |
32 | # Classes |
|
32 | # Classes | |
33 | #----------------------------------------------------------------------------- |
|
33 | #----------------------------------------------------------------------------- | |
34 | class Widget(LoggingConfigurable): |
|
34 | class Widget(LoggingConfigurable): | |
35 |
|
35 | |||
36 | # Shared declarations |
|
36 | # Shared declarations | |
37 | _keys = [] |
|
37 | _keys = [] | |
38 |
|
38 | |||
39 | # Public declarations |
|
39 | # Public declarations | |
40 | target_name = Unicode('widget', help="""Name of the backbone model |
|
40 | target_name = Unicode('widget', help="""Name of the backbone model | |
41 | registered in the frontend to create and sync this widget with.""") |
|
41 | registered in the frontend to create and sync this widget with.""") | |
42 | default_view_name = Unicode(help="""Default view registered in the frontend |
|
42 | default_view_name = Unicode(help="""Default view registered in the frontend | |
43 | to use to represent the widget.""") |
|
43 | to use to represent the widget.""") | |
44 | parent = Instance('IPython.html.widgets.widget.Widget') |
|
44 | parent = Instance('IPython.html.widgets.widget.Widget') | |
45 | visible = Bool(True, help="Whether or not the widget is visible.") |
|
45 | visible = Bool(True, help="Whether or not the widget is visible.") | |
46 |
|
46 | |||
47 | def _parent_changed(self, name, old, new): |
|
47 | def _parent_changed(self, name, old, new): | |
48 | if self._displayed: |
|
48 | if self._displayed: | |
49 | raise Exception('Parent cannot be set because widget has been displayed.') |
|
49 | raise Exception('Parent cannot be set because widget has been displayed.') | |
50 | elif new == self: |
|
50 | elif new == self: | |
51 | raise Exception('Parent cannot be set to self.') |
|
51 | raise Exception('Parent cannot be set to self.') | |
52 | else: |
|
52 | else: | |
53 |
|
53 | |||
54 | # Parent/child association |
|
54 | # Parent/child association | |
55 | if new is not None and not self in new._children: |
|
55 | if new is not None and not self in new._children: | |
56 | new._children.append(self) |
|
56 | new._children.append(self) | |
57 | if old is not None and self in old._children: |
|
57 | if old is not None and self in old._children: | |
58 | old._children.remove(self) |
|
58 | old._children.remove(self) | |
59 |
|
59 | |||
60 | # Private/protected declarations |
|
60 | # Private/protected declarations | |
61 | _property_lock = False |
|
61 | _property_lock = False | |
62 | _css = Dict() # Internal CSS property dict |
|
62 | _css = Dict() # Internal CSS property dict | |
63 | _add_class = List() # Used to add a js class to a DOM element (call#, selector, class_name) |
|
63 | _add_class = List() # Used to add a js class to a DOM element (call#, selector, class_name) | |
64 | _remove_class = List() # Used to remove a js class from a DOM element (call#, selector, class_name) |
|
64 | _remove_class = List() # Used to remove a js class from a DOM element (call#, selector, class_name) | |
65 | _displayed = False |
|
65 | _displayed = False | |
66 | _comm = None |
|
66 | _comm = None | |
67 |
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67 | |||
68 |
|
68 | |||
69 | def __init__(self, **kwargs): |
|
69 | def __init__(self, **kwargs): | |
70 | """Public constructor |
|
70 | """Public constructor | |
71 |
|
71 | |||
72 | Parameters |
|
72 | Parameters | |
73 | ---------- |
|
73 | ---------- | |
74 | parent : Widget instance (optional) |
|
74 | parent : Widget instance (optional) | |
75 | Widget that this widget instance is child of. When the widget is |
|
75 | Widget that this widget instance is child of. When the widget is | |
76 | displayed in the frontend, it's corresponding view will be made |
|
76 | displayed in the frontend, it's corresponding view will be made | |
77 | child of the parent's view if the parent's view exists already. If |
|
77 | child of the parent's view if the parent's view exists already. If | |
78 | the parent's view is displayed, it will automatically display this |
|
78 | the parent's view is displayed, it will automatically display this | |
79 | widget's default view as it's child. The default view can be set |
|
79 | widget's default view as it's child. The default view can be set | |
80 | via the default_view_name property. |
|
80 | via the default_view_name property. | |
81 | """ |
|
81 | """ | |
82 | self._children = [] |
|
82 | self._children = [] | |
83 | self._add_class = [0] |
|
83 | self._add_class = [0] | |
84 | self._remove_class = [0] |
|
84 | self._remove_class = [0] | |
85 | self._display_callbacks = [] |
|
85 | self._display_callbacks = [] | |
86 | super(Widget, self).__init__(**kwargs) |
|
86 | super(Widget, self).__init__(**kwargs) | |
87 |
|
87 | |||
88 | # Register after init to allow default values to be specified |
|
88 | # Register after init to allow default values to be specified | |
89 | self.on_trait_change(self._handle_property_changed, self.keys) |
|
89 | self.on_trait_change(self._handle_property_changed, self.keys) | |
90 |
|
90 | |||
91 |
|
91 | |||
92 | def __del__(self): |
|
92 | def __del__(self): | |
93 | """Object disposal""" |
|
93 | """Object disposal""" | |
94 | self.close() |
|
94 | self.close() | |
95 |
|
95 | |||
96 |
|
96 | |||
97 | def close(self): |
|
97 | def close(self): | |
98 | """Close method. Closes the widget which closes the underlying comm. |
|
98 | """Close method. Closes the widget which closes the underlying comm. | |
99 | When the comm is closed, all of the widget views are automatically |
|
99 | When the comm is closed, all of the widget views are automatically | |
100 | removed from the frontend.""" |
|
100 | removed from the frontend.""" | |
|
101 | try: | |||
101 | self._comm.close() |
|
102 | self._comm.close() | |
102 | del self._comm |
|
103 | del self._comm | |
|
104 | except: | |||
|
105 | pass # Comm doesn't exist and/or is already closed. | |||
103 |
|
106 | |||
104 |
|
107 | |||
105 | # Properties |
|
108 | # Properties | |
106 | def _get_keys(self): |
|
109 | def _get_keys(self): | |
107 | keys = ['visible', '_css', '_add_class', '_remove_class'] |
|
110 | keys = ['visible', '_css', '_add_class', '_remove_class'] | |
108 | keys.extend(self._keys) |
|
111 | keys.extend(self._keys) | |
109 | return keys |
|
112 | return keys | |
110 | keys = property(_get_keys) |
|
113 | keys = property(_get_keys) | |
111 |
|
114 | |||
112 |
|
115 | |||
113 | # Event handlers |
|
116 | # Event handlers | |
114 | def _handle_msg(self, msg): |
|
117 | def _handle_msg(self, msg): | |
115 | """Called when a msg is recieved from the frontend""" |
|
118 | """Called when a msg is recieved from the frontend""" | |
116 | # Handle backbone sync methods CREATE, PATCH, and UPDATE |
|
119 | # Handle backbone sync methods CREATE, PATCH, and UPDATE | |
117 | sync_method = msg['content']['data']['sync_method'] |
|
120 | sync_method = msg['content']['data']['sync_method'] | |
118 | sync_data = msg['content']['data']['sync_data'] |
|
121 | sync_data = msg['content']['data']['sync_data'] | |
119 | self._handle_recieve_state(sync_data) # handles all methods |
|
122 | self._handle_recieve_state(sync_data) # handles all methods | |
120 |
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123 | |||
121 |
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124 | |||
122 | def _handle_recieve_state(self, sync_data): |
|
125 | def _handle_recieve_state(self, sync_data): | |
123 | """Called when a state is recieved from the frontend.""" |
|
126 | """Called when a state is recieved from the frontend.""" | |
124 | self._property_lock = True |
|
127 | self._property_lock = True | |
125 | try: |
|
128 | try: | |
126 |
|
129 | |||
127 | # Use _keys instead of keys - Don't get retrieve the css from the client side. |
|
130 | # Use _keys instead of keys - Don't get retrieve the css from the client side. | |
128 | for name in self._keys: |
|
131 | for name in self._keys: | |
129 | if name in sync_data: |
|
132 | if name in sync_data: | |
130 | setattr(self, name, sync_data[name]) |
|
133 | setattr(self, name, sync_data[name]) | |
131 | finally: |
|
134 | finally: | |
132 | self._property_lock = False |
|
135 | self._property_lock = False | |
133 |
|
136 | |||
134 |
|
137 | |||
135 | def _handle_property_changed(self, name, old, new): |
|
138 | def _handle_property_changed(self, name, old, new): | |
136 | """Called when a proeprty has been changed.""" |
|
139 | """Called when a proeprty has been changed.""" | |
137 | if not self._property_lock and self._comm is not None: |
|
140 | if not self._property_lock and self._comm is not None: | |
138 | # TODO: Validate properties. |
|
141 | # TODO: Validate properties. | |
139 | # Send new state to frontend |
|
142 | # Send new state to frontend | |
140 | self.send_state(key=name) |
|
143 | self.send_state(key=name) | |
141 |
|
144 | |||
142 |
|
145 | |||
143 | def _handle_close(self): |
|
146 | def _handle_close(self): | |
144 | """Called when the comm is closed by the frontend.""" |
|
147 | """Called when the comm is closed by the frontend.""" | |
145 | self._comm = None |
|
148 | self._comm = None | |
146 |
|
149 | |||
147 |
|
150 | |||
148 | # Public methods |
|
151 | # Public methods | |
149 | def send_state(self, key=None): |
|
152 | def send_state(self, key=None): | |
150 | """Sends the widget state, or a piece of it, to the frontend. |
|
153 | """Sends the widget state, or a piece of it, to the frontend. | |
151 |
|
154 | |||
152 | Parameters |
|
155 | Parameters | |
153 | ---------- |
|
156 | ---------- | |
154 | key : unicode (optional) |
|
157 | key : unicode (optional) | |
155 | A single property's name to sync with the frontend. |
|
158 | A single property's name to sync with the frontend. | |
156 | """ |
|
159 | """ | |
157 | if self._comm is not None: |
|
160 | if self._comm is not None: | |
158 | state = {} |
|
161 | state = {} | |
159 |
|
162 | |||
160 | # If a key is provided, just send the state of that key. |
|
163 | # If a key is provided, just send the state of that key. | |
161 | keys = [] |
|
164 | keys = [] | |
162 | if key is None: |
|
165 | if key is None: | |
163 | keys.extend(self.keys) |
|
166 | keys.extend(self.keys) | |
164 | else: |
|
167 | else: | |
165 | keys.append(key) |
|
168 | keys.append(key) | |
166 | for key in self.keys: |
|
169 | for key in self.keys: | |
167 | try: |
|
170 | try: | |
168 | state[key] = getattr(self, key) |
|
171 | state[key] = getattr(self, key) | |
169 | except Exception as e: |
|
172 | except Exception as e: | |
170 | pass # Eat errors, nom nom nom |
|
173 | pass # Eat errors, nom nom nom | |
171 | self._comm.send({"method": "update", |
|
174 | self._comm.send({"method": "update", | |
172 | "state": state}) |
|
175 | "state": state}) | |
173 |
|
176 | |||
174 |
|
177 | |||
175 | def get_css(self, key, selector=""): |
|
178 | def get_css(self, key, selector=""): | |
176 | """Get a CSS property of the widget. Note, this function does not |
|
179 | """Get a CSS property of the widget. Note, this function does not | |
177 | actually request the CSS from the front-end; Only properties that have |
|
180 | actually request the CSS from the front-end; Only properties that have | |
178 | been set with set_css can be read. |
|
181 | been set with set_css can be read. | |
179 |
|
182 | |||
180 | Parameters |
|
183 | Parameters | |
181 | ---------- |
|
184 | ---------- | |
182 | key: unicode |
|
185 | key: unicode | |
183 | CSS key |
|
186 | CSS key | |
184 | selector: unicode (optional) |
|
187 | selector: unicode (optional) | |
185 | JQuery selector used when the CSS key/value was set. |
|
188 | JQuery selector used when the CSS key/value was set. | |
186 | """ |
|
189 | """ | |
187 | if selector in self._css and key in self._css[selector]: |
|
190 | if selector in self._css and key in self._css[selector]: | |
188 | return self._css[selector][key] |
|
191 | return self._css[selector][key] | |
189 | else: |
|
192 | else: | |
190 | return None |
|
193 | return None | |
191 |
|
194 | |||
192 |
|
195 | |||
193 | def set_css(self, *args, **kwargs): |
|
196 | def set_css(self, *args, **kwargs): | |
194 | """Set one or more CSS properties of the widget (shared among all of the |
|
197 | """Set one or more CSS properties of the widget (shared among all of the | |
195 | views). This function has two signatures: |
|
198 | views). This function has two signatures: | |
196 | - set_css(css_dict, [selector='']) |
|
199 | - set_css(css_dict, [selector='']) | |
197 | - set_css(key, value, [selector='']) |
|
200 | - set_css(key, value, [selector='']) | |
198 |
|
201 | |||
199 | Parameters |
|
202 | Parameters | |
200 | ---------- |
|
203 | ---------- | |
201 | css_dict : dict |
|
204 | css_dict : dict | |
202 | CSS key/value pairs to apply |
|
205 | CSS key/value pairs to apply | |
203 | key: unicode |
|
206 | key: unicode | |
204 | CSS key |
|
207 | CSS key | |
205 | value |
|
208 | value | |
206 | CSS value |
|
209 | CSS value | |
207 | selector: unicode (optional) |
|
210 | selector: unicode (optional) | |
208 | JQuery selector to use to apply the CSS key/value. |
|
211 | JQuery selector to use to apply the CSS key/value. | |
209 | """ |
|
212 | """ | |
210 | selector = kwargs.get('selector', '') |
|
213 | selector = kwargs.get('selector', '') | |
211 |
|
214 | |||
212 | # Signature 1: set_css(css_dict, [selector='']) |
|
215 | # Signature 1: set_css(css_dict, [selector='']) | |
213 | if len(args) == 1: |
|
216 | if len(args) == 1: | |
214 | if isinstance(args[0], dict): |
|
217 | if isinstance(args[0], dict): | |
215 | for (key, value) in args[0].items(): |
|
218 | for (key, value) in args[0].items(): | |
216 | self.set_css(key, value, selector=selector) |
|
219 | self.set_css(key, value, selector=selector) | |
217 | else: |
|
220 | else: | |
218 | raise Exception('css_dict must be a dict.') |
|
221 | raise Exception('css_dict must be a dict.') | |
219 |
|
222 | |||
220 | # Signature 2: set_css(key, value, [selector='']) |
|
223 | # Signature 2: set_css(key, value, [selector='']) | |
221 | elif len(args) == 2 or len(args) == 3: |
|
224 | elif len(args) == 2 or len(args) == 3: | |
222 |
|
225 | |||
223 | # Selector can be a positional arg if it's the 3rd value |
|
226 | # Selector can be a positional arg if it's the 3rd value | |
224 | if len(args) == 3: |
|
227 | if len(args) == 3: | |
225 | selector = args[2] |
|
228 | selector = args[2] | |
226 | if selector not in self._css: |
|
229 | if selector not in self._css: | |
227 | self._css[selector] = {} |
|
230 | self._css[selector] = {} | |
228 |
|
231 | |||
229 | # Only update the property if it has changed. |
|
232 | # Only update the property if it has changed. | |
230 | key = args[0] |
|
233 | key = args[0] | |
231 | value = args[1] |
|
234 | value = args[1] | |
232 | if not (key in self._css[selector] and value in self._css[selector][key]): |
|
235 | if not (key in self._css[selector] and value in self._css[selector][key]): | |
233 | self._css[selector][key] = value |
|
236 | self._css[selector][key] = value | |
234 | self.send_state('_css') # Send new state to client. |
|
237 | self.send_state('_css') # Send new state to client. | |
235 | else: |
|
238 | else: | |
236 | raise Exception('set_css only accepts 1-3 arguments') |
|
239 | raise Exception('set_css only accepts 1-3 arguments') | |
237 |
|
240 | |||
238 |
|
241 | |||
239 | def add_class(self, class_name, selector=""): |
|
242 | def add_class(self, class_name, selector=""): | |
240 | """Add class[es] to a DOM element |
|
243 | """Add class[es] to a DOM element | |
241 |
|
244 | |||
242 | Parameters |
|
245 | Parameters | |
243 | ---------- |
|
246 | ---------- | |
244 | class_name: unicode |
|
247 | class_name: unicode | |
245 | Class name(s) to add to the DOM element(s). Multiple class names |
|
248 | Class name(s) to add to the DOM element(s). Multiple class names | |
246 | must be space separated. |
|
249 | must be space separated. | |
247 | selector: unicode (optional) |
|
250 | selector: unicode (optional) | |
248 | JQuery selector to select the DOM element(s) that the class(es) will |
|
251 | JQuery selector to select the DOM element(s) that the class(es) will | |
249 | be added to. |
|
252 | be added to. | |
250 | """ |
|
253 | """ | |
251 | self._add_class = [self._add_class[0] + 1, selector, class_name] |
|
254 | self._add_class = [self._add_class[0] + 1, selector, class_name] | |
252 | self.send_state(key='_add_class') |
|
255 | self.send_state(key='_add_class') | |
253 |
|
256 | |||
254 |
|
257 | |||
255 | def remove_class(self, class_name, selector=""): |
|
258 | def remove_class(self, class_name, selector=""): | |
256 | """Remove class[es] from a DOM element |
|
259 | """Remove class[es] from a DOM element | |
257 |
|
260 | |||
258 | Parameters |
|
261 | Parameters | |
259 | ---------- |
|
262 | ---------- | |
260 | class_name: unicode |
|
263 | class_name: unicode | |
261 | Class name(s) to remove from the DOM element(s). Multiple class |
|
264 | Class name(s) to remove from the DOM element(s). Multiple class | |
262 | names must be space separated. |
|
265 | names must be space separated. | |
263 | selector: unicode (optional) |
|
266 | selector: unicode (optional) | |
264 | JQuery selector to select the DOM element(s) that the class(es) will |
|
267 | JQuery selector to select the DOM element(s) that the class(es) will | |
265 | be removed from. |
|
268 | be removed from. | |
266 | """ |
|
269 | """ | |
267 | self._remove_class = [self._remove_class[0] + 1, selector, class_name] |
|
270 | self._remove_class = [self._remove_class[0] + 1, selector, class_name] | |
268 | self.send_state(key='_remove_class') |
|
271 | self.send_state(key='_remove_class') | |
269 |
|
272 | |||
270 |
|
273 | |||
271 | def on_displayed(self, callback, remove=False): |
|
274 | def on_displayed(self, callback, remove=False): | |
272 | """Register a callback to be called when the widget has been displayed |
|
275 | """Register a callback to be called when the widget has been displayed | |
273 |
|
276 | |||
274 | Parameters |
|
277 | Parameters | |
275 | ---------- |
|
278 | ---------- | |
276 | callback: method handler |
|
279 | callback: method handler | |
277 | Can have a signature of: |
|
280 | Can have a signature of: | |
278 | - callback() |
|
281 | - callback() | |
279 | - callback(sender) |
|
282 | - callback(sender) | |
280 | - callback(sender, view_name) |
|
283 | - callback(sender, view_name) | |
281 | remove: bool |
|
284 | remove: bool | |
282 | True if the callback should be unregistered.""" |
|
285 | True if the callback should be unregistered.""" | |
283 | if remove: |
|
286 | if remove: | |
284 | self._display_callbacks.remove(callback) |
|
287 | self._display_callbacks.remove(callback) | |
285 | elif not callback in self._display_callbacks: |
|
288 | elif not callback in self._display_callbacks: | |
286 | self._display_callbacks.append(callback) |
|
289 | self._display_callbacks.append(callback) | |
287 |
|
290 | |||
288 |
|
291 | |||
289 | def handle_displayed(self, view_name): |
|
292 | def handle_displayed(self, view_name): | |
290 | """Called when a view has been displayed for this widget instance |
|
293 | """Called when a view has been displayed for this widget instance | |
291 |
|
294 | |||
292 | Parameters |
|
295 | Parameters | |
293 | ---------- |
|
296 | ---------- | |
294 | view_name: unicode |
|
297 | view_name: unicode | |
295 | Name of the view that was displayed.""" |
|
298 | Name of the view that was displayed.""" | |
296 | for handler in self._display_callbacks: |
|
299 | for handler in self._display_callbacks: | |
297 | if callable(handler): |
|
300 | if callable(handler): | |
298 | argspec = inspect.getargspec(handler) |
|
301 | argspec = inspect.getargspec(handler) | |
299 | nargs = len(argspec[0]) |
|
302 | nargs = len(argspec[0]) | |
300 |
|
303 | |||
301 | # Bound methods have an additional 'self' argument |
|
304 | # Bound methods have an additional 'self' argument | |
302 | if isinstance(handler, types.MethodType): |
|
305 | if isinstance(handler, types.MethodType): | |
303 | nargs -= 1 |
|
306 | nargs -= 1 | |
304 |
|
307 | |||
305 | # Call the callback |
|
308 | # Call the callback | |
306 | if nargs == 0: |
|
309 | if nargs == 0: | |
307 | handler() |
|
310 | handler() | |
308 | elif nargs == 1: |
|
311 | elif nargs == 1: | |
309 | handler(self) |
|
312 | handler(self) | |
310 | elif nargs == 2: |
|
313 | elif nargs == 2: | |
311 | handler(self, view_name) |
|
314 | handler(self, view_name) | |
312 | else: |
|
315 | else: | |
313 | raise TypeError('Widget display callback must ' \ |
|
316 | raise TypeError('Widget display callback must ' \ | |
314 | 'accept 0-2 arguments, not %d.' % nargs) |
|
317 | 'accept 0-2 arguments, not %d.' % nargs) | |
315 |
|
318 | |||
316 |
|
319 | |||
317 | # Support methods |
|
320 | # Support methods | |
318 | def _repr_widget_(self, view_name=None): |
|
321 | def _repr_widget_(self, view_name=None): | |
319 | """Function that is called when `IPython.display.display` is called on |
|
322 | """Function that is called when `IPython.display.display` is called on | |
320 | the widget. |
|
323 | the widget. | |
321 |
|
324 | |||
322 | Parameters |
|
325 | Parameters | |
323 | ---------- |
|
326 | ---------- | |
324 | view_name: unicode (optional) |
|
327 | view_name: unicode (optional) | |
325 | View to display in the frontend. Overrides default_view_name.""" |
|
328 | View to display in the frontend. Overrides default_view_name.""" | |
326 |
|
329 | |||
327 | if not view_name: |
|
330 | if not view_name: | |
328 | view_name = self.default_view_name |
|
331 | view_name = self.default_view_name | |
329 |
|
332 | |||
330 | # Create a comm. |
|
333 | # Create a comm. | |
331 | if self._comm is None: |
|
334 | if self._comm is None: | |
332 | self._comm = Comm(target_name=self.target_name) |
|
335 | self._comm = Comm(target_name=self.target_name) | |
333 | self._comm.on_msg(self._handle_msg) |
|
336 | self._comm.on_msg(self._handle_msg) | |
334 | self._comm.on_close(self._handle_close) |
|
337 | self._comm.on_close(self._handle_close) | |
335 |
|
338 | |||
336 | # Make sure model is syncronized |
|
339 | # Make sure model is syncronized | |
337 | self.send_state() |
|
340 | self.send_state() | |
338 |
|
341 | |||
339 | # Show view. |
|
342 | # Show view. | |
340 | if self.parent is None or self.parent._comm is None: |
|
343 | if self.parent is None or self.parent._comm is None: | |
341 | self._comm.send({"method": "display", "view_name": view_name}) |
|
344 | self._comm.send({"method": "display", "view_name": view_name}) | |
342 | else: |
|
345 | else: | |
343 | self._comm.send({"method": "display", |
|
346 | self._comm.send({"method": "display", | |
344 | "view_name": view_name, |
|
347 | "view_name": view_name, | |
345 | "parent": self.parent._comm.comm_id}) |
|
348 | "parent": self.parent._comm.comm_id}) | |
346 | self._displayed = True |
|
349 | self._displayed = True | |
347 | self.handle_displayed(view_name) |
|
350 | self.handle_displayed(view_name) | |
348 |
|
351 | |||
349 | # Now display children if any. |
|
352 | # Now display children if any. | |
350 | for child in self._children: |
|
353 | for child in self._children: | |
351 | if child != self: |
|
354 | if child != self: | |
352 | child._repr_widget_() |
|
355 | child._repr_widget_() | |
353 | return None |
|
356 | return None |
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