Show More
@@ -1,621 +1,621 b'' | |||
|
1 | 1 | // Copyright (c) IPython Development Team. |
|
2 | 2 | // Distributed under the terms of the Modified BSD License. |
|
3 | 3 | |
|
4 | 4 | define(["widgets/js/manager", |
|
5 | 5 | "underscore", |
|
6 | 6 | "backbone", |
|
7 | 7 | "jquery", |
|
8 | 8 | "base/js/namespace", |
|
9 | 9 | ], function(widgetmanager, _, Backbone, $, IPython){ |
|
10 | 10 | |
|
11 | 11 | var WidgetModel = Backbone.Model.extend({ |
|
12 | 12 | constructor: function (widget_manager, model_id, comm, init_state_callback) { |
|
13 | 13 | // Constructor |
|
14 | 14 | // |
|
15 | 15 | // Creates a WidgetModel instance. |
|
16 | 16 | // |
|
17 | 17 | // Parameters |
|
18 | 18 | // ---------- |
|
19 | 19 | // widget_manager : WidgetManager instance |
|
20 | 20 | // model_id : string |
|
21 | 21 | // An ID unique to this model. |
|
22 | 22 | // comm : Comm instance (optional) |
|
23 | 23 | // init_state_callback : callback (optional) |
|
24 | 24 | // Called once when the first state message is recieved from |
|
25 | 25 | // the back-end. |
|
26 | 26 | this.widget_manager = widget_manager; |
|
27 | 27 | this.init_state_callback = init_state_callback; |
|
28 | 28 | this._buffered_state_diff = {}; |
|
29 | 29 | this.pending_msgs = 0; |
|
30 | 30 | this.msg_buffer = null; |
|
31 | 31 | this.state_lock = null; |
|
32 | 32 | this.id = model_id; |
|
33 | 33 | this.views = {}; |
|
34 | 34 | |
|
35 | 35 | if (comm !== undefined) { |
|
36 | 36 | // Remember comm associated with the model. |
|
37 | 37 | this.comm = comm; |
|
38 | 38 | comm.model = this; |
|
39 | 39 | |
|
40 | 40 | // Hook comm messages up to model. |
|
41 | 41 | comm.on_close($.proxy(this._handle_comm_closed, this)); |
|
42 | 42 | comm.on_msg($.proxy(this._handle_comm_msg, this)); |
|
43 | 43 | } |
|
44 | 44 | return Backbone.Model.apply(this); |
|
45 | 45 | }, |
|
46 | 46 | |
|
47 | 47 | send: function (content, callbacks) { |
|
48 | 48 | // Send a custom msg over the comm. |
|
49 | 49 | if (this.comm !== undefined) { |
|
50 | 50 | var data = {method: 'custom', content: content}; |
|
51 | 51 | this.comm.send(data, callbacks); |
|
52 | 52 | this.pending_msgs++; |
|
53 | 53 | } |
|
54 | 54 | }, |
|
55 | 55 | |
|
56 | 56 | _handle_comm_closed: function (msg) { |
|
57 | 57 | // Handle when a widget is closed. |
|
58 | 58 | this.trigger('comm:close'); |
|
59 | 59 | this.stopListening(); |
|
60 | 60 | this.trigger('destroy', this); |
|
61 | 61 | delete this.comm.model; // Delete ref so GC will collect widget model. |
|
62 | 62 | delete this.comm; |
|
63 | 63 | delete this.model_id; // Delete id from model so widget manager cleans up. |
|
64 | 64 | for (var id in this.views) { |
|
65 | 65 | if (this.views.hasOwnProperty(id)) { |
|
66 | 66 | this.views[id].remove(); |
|
67 | 67 | } |
|
68 | 68 | } |
|
69 | 69 | }, |
|
70 | 70 | |
|
71 | 71 | _handle_comm_msg: function (msg) { |
|
72 | 72 | // Handle incoming comm msg. |
|
73 | 73 | var method = msg.content.data.method; |
|
74 | 74 | switch (method) { |
|
75 | 75 | case 'update': |
|
76 | 76 | this.set_state(msg.content.data.state); |
|
77 | 77 | if (this.init_state_callback) { |
|
78 | 78 | this.init_state_callback.apply(this, [this]); |
|
79 |
this.init_state_callback |
|
|
79 | delete this.init_state_callback; | |
|
80 | 80 | } |
|
81 | 81 | break; |
|
82 | 82 | case 'custom': |
|
83 | 83 | this.trigger('msg:custom', msg.content.data.content); |
|
84 | 84 | break; |
|
85 | 85 | case 'display': |
|
86 | 86 | this.widget_manager.display_view(msg, this); |
|
87 | 87 | break; |
|
88 | 88 | } |
|
89 | 89 | }, |
|
90 | 90 | |
|
91 | 91 | set_state: function (state) { |
|
92 | 92 | // Handle when a widget is updated via the python side. |
|
93 | 93 | this.state_lock = state; |
|
94 | 94 | try { |
|
95 | 95 | var that = this; |
|
96 | 96 | WidgetModel.__super__.set.apply(this, [Object.keys(state).reduce(function(obj, key) { |
|
97 | 97 | obj[key] = that._unpack_models(state[key]); |
|
98 | 98 | return obj; |
|
99 | 99 | }, {})]); |
|
100 | 100 | } finally { |
|
101 | 101 | this.state_lock = null; |
|
102 | 102 | } |
|
103 | 103 | }, |
|
104 | 104 | |
|
105 | 105 | _handle_status: function (msg, callbacks) { |
|
106 | 106 | // Handle status msgs. |
|
107 | 107 | |
|
108 | 108 | // execution_state : ('busy', 'idle', 'starting') |
|
109 | 109 | if (this.comm !== undefined) { |
|
110 | 110 | if (msg.content.execution_state ==='idle') { |
|
111 | 111 | // Send buffer if this message caused another message to be |
|
112 | 112 | // throttled. |
|
113 | 113 | if (this.msg_buffer !== null && |
|
114 | 114 | (this.get('msg_throttle') || 3) === this.pending_msgs) { |
|
115 | 115 | var data = {method: 'backbone', sync_method: 'update', sync_data: this.msg_buffer}; |
|
116 | 116 | this.comm.send(data, callbacks); |
|
117 | 117 | this.msg_buffer = null; |
|
118 | 118 | } else { |
|
119 | 119 | --this.pending_msgs; |
|
120 | 120 | } |
|
121 | 121 | } |
|
122 | 122 | } |
|
123 | 123 | }, |
|
124 | 124 | |
|
125 | 125 | callbacks: function(view) { |
|
126 | 126 | // Create msg callbacks for a comm msg. |
|
127 | 127 | var callbacks = this.widget_manager.callbacks(view); |
|
128 | 128 | |
|
129 | 129 | if (callbacks.iopub === undefined) { |
|
130 | 130 | callbacks.iopub = {}; |
|
131 | 131 | } |
|
132 | 132 | |
|
133 | 133 | var that = this; |
|
134 | 134 | callbacks.iopub.status = function (msg) { |
|
135 | 135 | that._handle_status(msg, callbacks); |
|
136 | 136 | }; |
|
137 | 137 | return callbacks; |
|
138 | 138 | }, |
|
139 | 139 | |
|
140 | 140 | set: function(key, val, options) { |
|
141 | 141 | // Set a value. |
|
142 | 142 | var return_value = WidgetModel.__super__.set.apply(this, arguments); |
|
143 | 143 | |
|
144 | 144 | // Backbone only remembers the diff of the most recent set() |
|
145 | 145 | // operation. Calling set multiple times in a row results in a |
|
146 | 146 | // loss of diff information. Here we keep our own running diff. |
|
147 | 147 | this._buffered_state_diff = $.extend(this._buffered_state_diff, this.changedAttributes() || {}); |
|
148 | 148 | return return_value; |
|
149 | 149 | }, |
|
150 | 150 | |
|
151 | 151 | sync: function (method, model, options) { |
|
152 | 152 | // Handle sync to the back-end. Called when a model.save() is called. |
|
153 | 153 | |
|
154 | 154 | // Make sure a comm exists. |
|
155 | 155 | var error = options.error || function() { |
|
156 | 156 | console.error('Backbone sync error:', arguments); |
|
157 | 157 | }; |
|
158 | 158 | if (this.comm === undefined) { |
|
159 | 159 | error(); |
|
160 | 160 | return false; |
|
161 | 161 | } |
|
162 | 162 | |
|
163 | 163 | // Delete any key value pairs that the back-end already knows about. |
|
164 | 164 | var attrs = (method === 'patch') ? options.attrs : model.toJSON(options); |
|
165 | 165 | if (this.state_lock !== null) { |
|
166 | 166 | var keys = Object.keys(this.state_lock); |
|
167 | 167 | for (var i=0; i<keys.length; i++) { |
|
168 | 168 | var key = keys[i]; |
|
169 | 169 | if (attrs[key] === this.state_lock[key]) { |
|
170 | 170 | delete attrs[key]; |
|
171 | 171 | } |
|
172 | 172 | } |
|
173 | 173 | } |
|
174 | 174 | |
|
175 | 175 | // Only sync if there are attributes to send to the back-end. |
|
176 | 176 | attrs = this._pack_models(attrs); |
|
177 | 177 | if (_.size(attrs) > 0) { |
|
178 | 178 | |
|
179 | 179 | // If this message was sent via backbone itself, it will not |
|
180 | 180 | // have any callbacks. It's important that we create callbacks |
|
181 | 181 | // so we can listen for status messages, etc... |
|
182 | 182 | var callbacks = options.callbacks || this.callbacks(); |
|
183 | 183 | |
|
184 | 184 | // Check throttle. |
|
185 | 185 | if (this.pending_msgs >= (this.get('msg_throttle') || 3)) { |
|
186 | 186 | // The throttle has been exceeded, buffer the current msg so |
|
187 | 187 | // it can be sent once the kernel has finished processing |
|
188 | 188 | // some of the existing messages. |
|
189 | 189 | |
|
190 | 190 | // Combine updates if it is a 'patch' sync, otherwise replace updates |
|
191 | 191 | switch (method) { |
|
192 | 192 | case 'patch': |
|
193 | 193 | this.msg_buffer = $.extend(this.msg_buffer || {}, attrs); |
|
194 | 194 | break; |
|
195 | 195 | case 'update': |
|
196 | 196 | case 'create': |
|
197 | 197 | this.msg_buffer = attrs; |
|
198 | 198 | break; |
|
199 | 199 | default: |
|
200 | 200 | error(); |
|
201 | 201 | return false; |
|
202 | 202 | } |
|
203 | 203 | this.msg_buffer_callbacks = callbacks; |
|
204 | 204 | |
|
205 | 205 | } else { |
|
206 | 206 | // We haven't exceeded the throttle, send the message like |
|
207 | 207 | // normal. |
|
208 | 208 | var data = {method: 'backbone', sync_data: attrs}; |
|
209 | 209 | this.comm.send(data, callbacks); |
|
210 | 210 | this.pending_msgs++; |
|
211 | 211 | } |
|
212 | 212 | } |
|
213 | 213 | // Since the comm is a one-way communication, assume the message |
|
214 | 214 | // arrived. Don't call success since we don't have a model back from the server |
|
215 | 215 | // this means we miss out on the 'sync' event. |
|
216 | 216 | this._buffered_state_diff = {}; |
|
217 | 217 | }, |
|
218 | 218 | |
|
219 | 219 | save_changes: function(callbacks) { |
|
220 | 220 | // Push this model's state to the back-end |
|
221 | 221 | // |
|
222 | 222 | // This invokes a Backbone.Sync. |
|
223 | 223 | this.save(this._buffered_state_diff, {patch: true, callbacks: callbacks}); |
|
224 | 224 | }, |
|
225 | 225 | |
|
226 | 226 | _pack_models: function(value) { |
|
227 | 227 | // Replace models with model ids recursively. |
|
228 | 228 | var that = this; |
|
229 | 229 | var packed; |
|
230 | 230 | if (value instanceof Backbone.Model) { |
|
231 | 231 | return "IPY_MODEL_" + value.id; |
|
232 | 232 | |
|
233 | 233 | } else if ($.isArray(value)) { |
|
234 | 234 | packed = []; |
|
235 | 235 | _.each(value, function(sub_value, key) { |
|
236 | 236 | packed.push(that._pack_models(sub_value)); |
|
237 | 237 | }); |
|
238 | 238 | return packed; |
|
239 | 239 | |
|
240 | 240 | } else if (value instanceof Object) { |
|
241 | 241 | packed = {}; |
|
242 | 242 | _.each(value, function(sub_value, key) { |
|
243 | 243 | packed[key] = that._pack_models(sub_value); |
|
244 | 244 | }); |
|
245 | 245 | return packed; |
|
246 | 246 | |
|
247 | 247 | } else { |
|
248 | 248 | return value; |
|
249 | 249 | } |
|
250 | 250 | }, |
|
251 | 251 | |
|
252 | 252 | _unpack_models: function(value) { |
|
253 | 253 | // Replace model ids with models recursively. |
|
254 | 254 | var that = this; |
|
255 | 255 | var unpacked; |
|
256 | 256 | if ($.isArray(value)) { |
|
257 | 257 | unpacked = []; |
|
258 | 258 | _.each(value, function(sub_value, key) { |
|
259 | 259 | unpacked.push(that._unpack_models(sub_value)); |
|
260 | 260 | }); |
|
261 | 261 | return unpacked; |
|
262 | 262 | |
|
263 | 263 | } else if (value instanceof Object) { |
|
264 | 264 | unpacked = {}; |
|
265 | 265 | _.each(value, function(sub_value, key) { |
|
266 | 266 | unpacked[key] = that._unpack_models(sub_value); |
|
267 | 267 | }); |
|
268 | 268 | return unpacked; |
|
269 | 269 | |
|
270 | 270 | } else if (typeof value === 'string' && value.slice(0,10) === "IPY_MODEL_") { |
|
271 | 271 | var model = this.widget_manager.get_model(value.slice(10, value.length)); |
|
272 | 272 | if (model) { |
|
273 | 273 | return model; |
|
274 | 274 | } else { |
|
275 | 275 | return value; |
|
276 | 276 | } |
|
277 | 277 | } else { |
|
278 | 278 | return value; |
|
279 | 279 | } |
|
280 | 280 | }, |
|
281 | 281 | |
|
282 | 282 | on_some_change: function(keys, callback, context) { |
|
283 | 283 | // on_some_change(["key1", "key2"], foo, context) differs from |
|
284 | 284 | // on("change:key1 change:key2", foo, context). |
|
285 | 285 | // If the widget attributes key1 and key2 are both modified, |
|
286 | 286 | // the second form will result in foo being called twice |
|
287 | 287 | // while the first will call foo only once. |
|
288 | 288 | this.on('change', function() { |
|
289 | 289 | if (keys.some(this.hasChanged, this)) { |
|
290 | 290 | callback.apply(context); |
|
291 | 291 | } |
|
292 | 292 | }, this); |
|
293 | 293 | |
|
294 | 294 | }, |
|
295 | 295 | }); |
|
296 | 296 | widgetmanager.WidgetManager.register_widget_model('WidgetModel', WidgetModel); |
|
297 | 297 | |
|
298 | 298 | |
|
299 | 299 | var WidgetView = Backbone.View.extend({ |
|
300 | 300 | initialize: function(parameters) { |
|
301 | 301 | // Public constructor. |
|
302 | 302 | this.model.on('change',this.update,this); |
|
303 | 303 | this.options = parameters.options; |
|
304 | 304 | this.child_model_views = {}; |
|
305 | 305 | this.child_views = {}; |
|
306 | 306 | this.id = this.id || IPython.utils.uuid(); |
|
307 | 307 | this.model.views[this.id] = this; |
|
308 | 308 | this.on('displayed', function() { |
|
309 | 309 | this.is_displayed = true; |
|
310 | 310 | }, this); |
|
311 | 311 | }, |
|
312 | 312 | |
|
313 | 313 | update: function(){ |
|
314 | 314 | // Triggered on model change. |
|
315 | 315 | // |
|
316 | 316 | // Update view to be consistent with this.model |
|
317 | 317 | }, |
|
318 | 318 | |
|
319 | 319 | create_child_view: function(child_model, options) { |
|
320 | 320 | // Create and return a child view. |
|
321 | 321 | // |
|
322 | 322 | // -given a model and (optionally) a view name if the view name is |
|
323 | 323 | // not given, it defaults to the model's default view attribute. |
|
324 | 324 | |
|
325 | 325 | // TODO: this is hacky, and makes the view depend on this cell attribute and widget manager behavior |
|
326 | 326 | // it would be great to have the widget manager add the cell metadata |
|
327 | 327 | // to the subview without having to add it here. |
|
328 | 328 | var that = this; |
|
329 | 329 | var old_callback = options.callback || function(view) {}; |
|
330 | 330 | options = $.extend({ parent: this, callback: function(child_view) { |
|
331 | 331 | // Associate the view id with the model id. |
|
332 | 332 | if (that.child_model_views[child_model.id] === undefined) { |
|
333 | 333 | that.child_model_views[child_model.id] = []; |
|
334 | 334 | } |
|
335 | 335 | that.child_model_views[child_model.id].push(child_view.id); |
|
336 | 336 | |
|
337 | 337 | // Remember the view by id. |
|
338 | 338 | that.child_views[child_view.id] = child_view; |
|
339 | 339 | old_callback(child_view); |
|
340 | 340 | }}, options || {}); |
|
341 | 341 | |
|
342 | 342 | this.model.widget_manager.create_view(child_model, options); |
|
343 | 343 | }, |
|
344 | 344 | |
|
345 | 345 | pop_child_view: function(child_model) { |
|
346 | 346 | // Delete a child view that was previously created using create_child_view. |
|
347 | 347 | var view_ids = this.child_model_views[child_model.id]; |
|
348 | 348 | if (view_ids !== undefined) { |
|
349 | 349 | |
|
350 | 350 | // Only delete the first view in the list. |
|
351 | 351 | var view_id = view_ids[0]; |
|
352 | 352 | var view = this.child_views[view_id]; |
|
353 | 353 | delete this.child_views[view_id]; |
|
354 | 354 | view_ids.splice(0,1); |
|
355 | 355 | delete child_model.views[view_id]; |
|
356 | 356 | |
|
357 | 357 | // Remove the view list specific to this model if it is empty. |
|
358 | 358 | if (view_ids.length === 0) { |
|
359 | 359 | delete this.child_model_views[child_model.id]; |
|
360 | 360 | } |
|
361 | 361 | return view; |
|
362 | 362 | } |
|
363 | 363 | return null; |
|
364 | 364 | }, |
|
365 | 365 | |
|
366 | 366 | do_diff: function(old_list, new_list, removed_callback, added_callback) { |
|
367 | 367 | // Difference a changed list and call remove and add callbacks for |
|
368 | 368 | // each removed and added item in the new list. |
|
369 | 369 | // |
|
370 | 370 | // Parameters |
|
371 | 371 | // ---------- |
|
372 | 372 | // old_list : array |
|
373 | 373 | // new_list : array |
|
374 | 374 | // removed_callback : Callback(item) |
|
375 | 375 | // Callback that is called for each item removed. |
|
376 | 376 | // added_callback : Callback(item) |
|
377 | 377 | // Callback that is called for each item added. |
|
378 | 378 | |
|
379 | 379 | // Walk the lists until an unequal entry is found. |
|
380 | 380 | var i; |
|
381 | 381 | for (i = 0; i < new_list.length; i++) { |
|
382 | 382 | if (i >= old_list.length || new_list[i] !== old_list[i]) { |
|
383 | 383 | break; |
|
384 | 384 | } |
|
385 | 385 | } |
|
386 | 386 | |
|
387 | 387 | // Remove the non-matching items from the old list. |
|
388 | 388 | for (var j = i; j < old_list.length; j++) { |
|
389 | 389 | removed_callback(old_list[j]); |
|
390 | 390 | } |
|
391 | 391 | |
|
392 | 392 | // Add the rest of the new list items. |
|
393 | 393 | for (; i < new_list.length; i++) { |
|
394 | 394 | added_callback(new_list[i]); |
|
395 | 395 | } |
|
396 | 396 | }, |
|
397 | 397 | |
|
398 | 398 | callbacks: function(){ |
|
399 | 399 | // Create msg callbacks for a comm msg. |
|
400 | 400 | return this.model.callbacks(this); |
|
401 | 401 | }, |
|
402 | 402 | |
|
403 | 403 | render: function(){ |
|
404 | 404 | // Render the view. |
|
405 | 405 | // |
|
406 | 406 | // By default, this is only called the first time the view is created |
|
407 | 407 | }, |
|
408 | 408 | |
|
409 | 409 | show: function(){ |
|
410 | 410 | // Show the widget-area |
|
411 | 411 | if (this.options && this.options.cell && |
|
412 | 412 | this.options.cell.widget_area !== undefined) { |
|
413 | 413 | this.options.cell.widget_area.show(); |
|
414 | 414 | } |
|
415 | 415 | }, |
|
416 | 416 | |
|
417 | 417 | send: function (content) { |
|
418 | 418 | // Send a custom msg associated with this view. |
|
419 | 419 | this.model.send(content, this.callbacks()); |
|
420 | 420 | }, |
|
421 | 421 | |
|
422 | 422 | touch: function () { |
|
423 | 423 | this.model.save_changes(this.callbacks()); |
|
424 | 424 | }, |
|
425 | 425 | |
|
426 | 426 | after_displayed: function (callback, context) { |
|
427 | 427 | // Calls the callback right away is the view is already displayed |
|
428 | 428 | // otherwise, register the callback to the 'displayed' event. |
|
429 | 429 | if (this.is_displayed) { |
|
430 | 430 | callback.apply(context); |
|
431 | 431 | } else { |
|
432 | 432 | this.on('displayed', callback, context); |
|
433 | 433 | } |
|
434 | 434 | }, |
|
435 | 435 | }); |
|
436 | 436 | |
|
437 | 437 | |
|
438 | 438 | var DOMWidgetView = WidgetView.extend({ |
|
439 | 439 | initialize: function (parameters) { |
|
440 | 440 | // Public constructor |
|
441 | 441 | DOMWidgetView.__super__.initialize.apply(this, [parameters]); |
|
442 | 442 | this.on('displayed', this.show, this); |
|
443 | 443 | this.model.on('change:visible', this.update_visible, this); |
|
444 | 444 | this.model.on('change:_css', this.update_css, this); |
|
445 | 445 | |
|
446 | 446 | this.model.on('change:_dom_classes', function(model, new_classes) { |
|
447 | 447 | var old_classes = model.previous('_dom_classes'); |
|
448 | 448 | this.update_classes(old_classes, new_classes); |
|
449 | 449 | }, this); |
|
450 | 450 | |
|
451 | 451 | this.model.on('change:color', function (model, value) { |
|
452 | 452 | this.update_attr('color', value); }, this); |
|
453 | 453 | |
|
454 | 454 | this.model.on('change:background_color', function (model, value) { |
|
455 | 455 | this.update_attr('background', value); }, this); |
|
456 | 456 | |
|
457 | 457 | this.model.on('change:width', function (model, value) { |
|
458 | 458 | this.update_attr('width', value); }, this); |
|
459 | 459 | |
|
460 | 460 | this.model.on('change:height', function (model, value) { |
|
461 | 461 | this.update_attr('height', value); }, this); |
|
462 | 462 | |
|
463 | 463 | this.model.on('change:border_color', function (model, value) { |
|
464 | 464 | this.update_attr('border-color', value); }, this); |
|
465 | 465 | |
|
466 | 466 | this.model.on('change:border_width', function (model, value) { |
|
467 | 467 | this.update_attr('border-width', value); }, this); |
|
468 | 468 | |
|
469 | 469 | this.model.on('change:border_style', function (model, value) { |
|
470 | 470 | this.update_attr('border-style', value); }, this); |
|
471 | 471 | |
|
472 | 472 | this.model.on('change:font_style', function (model, value) { |
|
473 | 473 | this.update_attr('font-style', value); }, this); |
|
474 | 474 | |
|
475 | 475 | this.model.on('change:font_weight', function (model, value) { |
|
476 | 476 | this.update_attr('font-weight', value); }, this); |
|
477 | 477 | |
|
478 | 478 | this.model.on('change:font_size', function (model, value) { |
|
479 | 479 | this.update_attr('font-size', this._default_px(value)); }, this); |
|
480 | 480 | |
|
481 | 481 | this.model.on('change:font_family', function (model, value) { |
|
482 | 482 | this.update_attr('font-family', value); }, this); |
|
483 | 483 | |
|
484 | 484 | this.model.on('change:padding', function (model, value) { |
|
485 | 485 | this.update_attr('padding', value); }, this); |
|
486 | 486 | |
|
487 | 487 | this.model.on('change:margin', function (model, value) { |
|
488 | 488 | this.update_attr('margin', this._default_px(value)); }, this); |
|
489 | 489 | |
|
490 | 490 | this.model.on('change:border_radius', function (model, value) { |
|
491 | 491 | this.update_attr('border-radius', this._default_px(value)); }, this); |
|
492 | 492 | |
|
493 | 493 | this.after_displayed(function() { |
|
494 | 494 | this.update_visible(this.model, this.model.get("visible")); |
|
495 | 495 | this.update_classes([], this.model.get('_dom_classes')); |
|
496 | 496 | |
|
497 | 497 | this.update_attr('color', this.model.get('color')); |
|
498 | 498 | this.update_attr('background', this.model.get('background_color')); |
|
499 | 499 | this.update_attr('width', this.model.get('width')); |
|
500 | 500 | this.update_attr('height', this.model.get('height')); |
|
501 | 501 | this.update_attr('border-color', this.model.get('border_color')); |
|
502 | 502 | this.update_attr('border-width', this.model.get('border_width')); |
|
503 | 503 | this.update_attr('border-style', this.model.get('border_style')); |
|
504 | 504 | this.update_attr('font-style', this.model.get('font_style')); |
|
505 | 505 | this.update_attr('font-weight', this.model.get('font_weight')); |
|
506 | 506 | this.update_attr('font-size', this.model.get('font_size')); |
|
507 | 507 | this.update_attr('font-family', this.model.get('font_family')); |
|
508 | 508 | this.update_attr('padding', this.model.get('padding')); |
|
509 | 509 | this.update_attr('margin', this.model.get('margin')); |
|
510 | 510 | this.update_attr('border-radius', this.model.get('border_radius')); |
|
511 | 511 | |
|
512 | 512 | this.update_css(this.model, this.model.get("_css")); |
|
513 | 513 | }, this); |
|
514 | 514 | }, |
|
515 | 515 | |
|
516 | 516 | _default_px: function(value) { |
|
517 | 517 | // Makes browser interpret a numerical string as a pixel value. |
|
518 | 518 | if (/^\d+\.?(\d+)?$/.test(value.trim())) { |
|
519 | 519 | return value.trim() + 'px'; |
|
520 | 520 | } |
|
521 | 521 | return value; |
|
522 | 522 | }, |
|
523 | 523 | |
|
524 | 524 | update_attr: function(name, value) { |
|
525 | 525 | // Set a css attr of the widget view. |
|
526 | 526 | this.$el.css(name, value); |
|
527 | 527 | }, |
|
528 | 528 | |
|
529 | 529 | update_visible: function(model, value) { |
|
530 | 530 | // Update visibility |
|
531 | 531 | this.$el.toggle(value); |
|
532 | 532 | }, |
|
533 | 533 | |
|
534 | 534 | update_css: function (model, css) { |
|
535 | 535 | // Update the css styling of this view. |
|
536 | 536 | var e = this.$el; |
|
537 | 537 | if (css === undefined) {return;} |
|
538 | 538 | for (var i = 0; i < css.length; i++) { |
|
539 | 539 | // Apply the css traits to all elements that match the selector. |
|
540 | 540 | var selector = css[i][0]; |
|
541 | 541 | var elements = this._get_selector_element(selector); |
|
542 | 542 | if (elements.length > 0) { |
|
543 | 543 | var trait_key = css[i][1]; |
|
544 | 544 | var trait_value = css[i][2]; |
|
545 | 545 | elements.css(trait_key ,trait_value); |
|
546 | 546 | } |
|
547 | 547 | } |
|
548 | 548 | }, |
|
549 | 549 | |
|
550 | 550 | update_classes: function (old_classes, new_classes, $el) { |
|
551 | 551 | // Update the DOM classes applied to an element, default to this.$el. |
|
552 | 552 | if ($el===undefined) { |
|
553 | 553 | $el = this.$el; |
|
554 | 554 | } |
|
555 | 555 | this.do_diff(old_classes, new_classes, function(removed) { |
|
556 | 556 | $el.removeClass(removed); |
|
557 | 557 | }, function(added) { |
|
558 | 558 | $el.addClass(added); |
|
559 | 559 | }); |
|
560 | 560 | }, |
|
561 | 561 | |
|
562 | 562 | update_mapped_classes: function(class_map, trait_name, previous_trait_value, $el) { |
|
563 | 563 | // Update the DOM classes applied to the widget based on a single |
|
564 | 564 | // trait's value. |
|
565 | 565 | // |
|
566 | 566 | // Given a trait value classes map, this function automatically |
|
567 | 567 | // handles applying the appropriate classes to the widget element |
|
568 | 568 | // and removing classes that are no longer valid. |
|
569 | 569 | // |
|
570 | 570 | // Parameters |
|
571 | 571 | // ---------- |
|
572 | 572 | // class_map: dictionary |
|
573 | 573 | // Dictionary of trait values to class lists. |
|
574 | 574 | // Example: |
|
575 | 575 | // { |
|
576 | 576 | // success: ['alert', 'alert-success'], |
|
577 | 577 | // info: ['alert', 'alert-info'], |
|
578 | 578 | // warning: ['alert', 'alert-warning'], |
|
579 | 579 | // danger: ['alert', 'alert-danger'] |
|
580 | 580 | // }; |
|
581 | 581 | // trait_name: string |
|
582 | 582 | // Name of the trait to check the value of. |
|
583 | 583 | // previous_trait_value: optional string, default '' |
|
584 | 584 | // Last trait value |
|
585 | 585 | // $el: optional jQuery element handle, defaults to this.$el |
|
586 | 586 | // Element that the classes are applied to. |
|
587 | 587 | var key = previous_trait_value; |
|
588 | 588 | if (key === undefined) { |
|
589 | 589 | key = this.model.previous(trait_name); |
|
590 | 590 | } |
|
591 | 591 | var old_classes = class_map[key] ? class_map[key] : []; |
|
592 | 592 | key = this.model.get(trait_name); |
|
593 | 593 | var new_classes = class_map[key] ? class_map[key] : []; |
|
594 | 594 | |
|
595 | 595 | this.update_classes(old_classes, new_classes, $el || this.$el); |
|
596 | 596 | }, |
|
597 | 597 | |
|
598 | 598 | _get_selector_element: function (selector) { |
|
599 | 599 | // Get the elements via the css selector. |
|
600 | 600 | var elements; |
|
601 | 601 | if (!selector) { |
|
602 | 602 | elements = this.$el; |
|
603 | 603 | } else { |
|
604 | 604 | elements = this.$el.find(selector).addBack(selector); |
|
605 | 605 | } |
|
606 | 606 | return elements; |
|
607 | 607 | }, |
|
608 | 608 | }); |
|
609 | 609 | |
|
610 | 610 | |
|
611 | 611 | var widget = { |
|
612 | 612 | 'WidgetModel': WidgetModel, |
|
613 | 613 | 'WidgetView': WidgetView, |
|
614 | 614 | 'DOMWidgetView': DOMWidgetView, |
|
615 | 615 | }; |
|
616 | 616 | |
|
617 | 617 | // For backwards compatability. |
|
618 | 618 | $.extend(IPython, widget); |
|
619 | 619 | |
|
620 | 620 | return widget; |
|
621 | 621 | }); |
@@ -1,470 +1,469 b'' | |||
|
1 | 1 | """Base Widget class. Allows user to create widgets in the back-end that render |
|
2 | 2 | in the IPython notebook front-end. |
|
3 | 3 | """ |
|
4 | 4 | #----------------------------------------------------------------------------- |
|
5 | 5 | # Copyright (c) 2013, the IPython Development Team. |
|
6 | 6 | # |
|
7 | 7 | # Distributed under the terms of the Modified BSD License. |
|
8 | 8 | # |
|
9 | 9 | # The full license is in the file COPYING.txt, distributed with this software. |
|
10 | 10 | #----------------------------------------------------------------------------- |
|
11 | 11 | |
|
12 | 12 | #----------------------------------------------------------------------------- |
|
13 | 13 | # Imports |
|
14 | 14 | #----------------------------------------------------------------------------- |
|
15 | 15 | from contextlib import contextmanager |
|
16 | 16 | import collections |
|
17 | 17 | |
|
18 | 18 | from IPython.core.getipython import get_ipython |
|
19 | 19 | from IPython.kernel.comm import Comm |
|
20 | 20 | from IPython.config import LoggingConfigurable |
|
21 | 21 | from IPython.utils.importstring import import_item |
|
22 | 22 | from IPython.utils.traitlets import Unicode, Dict, Instance, Bool, List, \ |
|
23 | 23 | CaselessStrEnum, Tuple, CUnicode, Int, Set |
|
24 | 24 | from IPython.utils.py3compat import string_types |
|
25 | 25 | |
|
26 | 26 | #----------------------------------------------------------------------------- |
|
27 | 27 | # Classes |
|
28 | 28 | #----------------------------------------------------------------------------- |
|
29 | 29 | class CallbackDispatcher(LoggingConfigurable): |
|
30 | 30 | """A structure for registering and running callbacks""" |
|
31 | 31 | callbacks = List() |
|
32 | 32 | |
|
33 | 33 | def __call__(self, *args, **kwargs): |
|
34 | 34 | """Call all of the registered callbacks.""" |
|
35 | 35 | value = None |
|
36 | 36 | for callback in self.callbacks: |
|
37 | 37 | try: |
|
38 | 38 | local_value = callback(*args, **kwargs) |
|
39 | 39 | except Exception as e: |
|
40 | 40 | ip = get_ipython() |
|
41 | 41 | if ip is None: |
|
42 | 42 | self.log.warn("Exception in callback %s: %s", callback, e, exc_info=True) |
|
43 | 43 | else: |
|
44 | 44 | ip.showtraceback() |
|
45 | 45 | else: |
|
46 | 46 | value = local_value if local_value is not None else value |
|
47 | 47 | return value |
|
48 | 48 | |
|
49 | 49 | def register_callback(self, callback, remove=False): |
|
50 | 50 | """(Un)Register a callback |
|
51 | 51 | |
|
52 | 52 | Parameters |
|
53 | 53 | ---------- |
|
54 | 54 | callback: method handle |
|
55 | 55 | Method to be registered or unregistered. |
|
56 | 56 | remove=False: bool |
|
57 | 57 | Whether to unregister the callback.""" |
|
58 | 58 | |
|
59 | 59 | # (Un)Register the callback. |
|
60 | 60 | if remove and callback in self.callbacks: |
|
61 | 61 | self.callbacks.remove(callback) |
|
62 | 62 | elif not remove and callback not in self.callbacks: |
|
63 | 63 | self.callbacks.append(callback) |
|
64 | 64 | |
|
65 | 65 | def _show_traceback(method): |
|
66 | 66 | """decorator for showing tracebacks in IPython""" |
|
67 | 67 | def m(self, *args, **kwargs): |
|
68 | 68 | try: |
|
69 | 69 | return(method(self, *args, **kwargs)) |
|
70 | 70 | except Exception as e: |
|
71 | 71 | ip = get_ipython() |
|
72 | 72 | if ip is None: |
|
73 | 73 | self.log.warn("Exception in widget method %s: %s", method, e, exc_info=True) |
|
74 | 74 | else: |
|
75 | 75 | ip.showtraceback() |
|
76 | 76 | return m |
|
77 | 77 | |
|
78 | 78 | class Widget(LoggingConfigurable): |
|
79 | 79 | #------------------------------------------------------------------------- |
|
80 | 80 | # Class attributes |
|
81 | 81 | #------------------------------------------------------------------------- |
|
82 | 82 | _widget_construction_callback = None |
|
83 | 83 | widgets = {} |
|
84 | 84 | |
|
85 | 85 | @staticmethod |
|
86 | 86 | def on_widget_constructed(callback): |
|
87 | 87 | """Registers a callback to be called when a widget is constructed. |
|
88 | 88 | |
|
89 | 89 | The callback must have the following signature: |
|
90 | 90 | callback(widget)""" |
|
91 | 91 | Widget._widget_construction_callback = callback |
|
92 | 92 | |
|
93 | 93 | @staticmethod |
|
94 | 94 | def _call_widget_constructed(widget): |
|
95 | 95 | """Static method, called when a widget is constructed.""" |
|
96 | 96 | if Widget._widget_construction_callback is not None and callable(Widget._widget_construction_callback): |
|
97 | 97 | Widget._widget_construction_callback(widget) |
|
98 | 98 | |
|
99 | 99 | @staticmethod |
|
100 | 100 | def handle_comm_opened(comm, msg): |
|
101 | 101 | """Static method, called when a widget is constructed.""" |
|
102 | 102 | target_name = msg['content']['data']['target_name'] |
|
103 | 103 | widget_class = import_item(target_name) |
|
104 | 104 | widget = widget_class(open_comm=False) |
|
105 |
widget. |
|
|
105 | widget.comm = comm | |
|
106 | 106 | |
|
107 | 107 | |
|
108 | 108 | #------------------------------------------------------------------------- |
|
109 | 109 | # Traits |
|
110 | 110 | #------------------------------------------------------------------------- |
|
111 | 111 | _model_module = Unicode(None, allow_none=True, help="""A requirejs module name |
|
112 | 112 | in which to find _model_name. If empty, look in the global registry.""") |
|
113 | 113 | _model_name = Unicode('WidgetModel', help="""Name of the backbone model |
|
114 | 114 | registered in the front-end to create and sync this widget with.""") |
|
115 | 115 | _view_module = Unicode(help="""A requirejs module in which to find _view_name. |
|
116 | 116 | If empty, look in the global registry.""", sync=True) |
|
117 | 117 | _view_name = Unicode(None, allow_none=True, help="""Default view registered in the front-end |
|
118 | 118 | to use to represent the widget.""", sync=True) |
|
119 | 119 | comm = Instance('IPython.kernel.comm.Comm') |
|
120 | 120 | |
|
121 | 121 | msg_throttle = Int(3, sync=True, help="""Maximum number of msgs the |
|
122 | 122 | front-end can send before receiving an idle msg from the back-end.""") |
|
123 | 123 | |
|
124 | 124 | version = Int(0, sync=True, help="""Widget's version""") |
|
125 | 125 | keys = List() |
|
126 | 126 | def _keys_default(self): |
|
127 | 127 | return [name for name in self.traits(sync=True)] |
|
128 | 128 | |
|
129 | 129 | _property_lock = Tuple((None, None)) |
|
130 | 130 | _send_state_lock = Int(0) |
|
131 | 131 | _states_to_send = Set(allow_none=False) |
|
132 | 132 | _display_callbacks = Instance(CallbackDispatcher, ()) |
|
133 | 133 | _msg_callbacks = Instance(CallbackDispatcher, ()) |
|
134 | 134 | |
|
135 | 135 | #------------------------------------------------------------------------- |
|
136 | 136 | # (Con/de)structor |
|
137 | 137 | #------------------------------------------------------------------------- |
|
138 | 138 | def __init__(self, open_comm=True, **kwargs): |
|
139 | 139 | """Public constructor""" |
|
140 | 140 | self._model_id = kwargs.pop('model_id', None) |
|
141 | 141 | super(Widget, self).__init__(**kwargs) |
|
142 | 142 | |
|
143 | 143 | Widget._call_widget_constructed(self) |
|
144 | 144 | if open_comm: |
|
145 | 145 | self.open() |
|
146 | 146 | |
|
147 | 147 | def __del__(self): |
|
148 | 148 | """Object disposal""" |
|
149 | 149 | self.close() |
|
150 | 150 | |
|
151 | 151 | #------------------------------------------------------------------------- |
|
152 | 152 | # Properties |
|
153 | 153 | #------------------------------------------------------------------------- |
|
154 | 154 | |
|
155 | 155 | def open(self): |
|
156 | 156 | """Open a comm to the frontend if one isn't already open.""" |
|
157 | 157 | if self.comm is None: |
|
158 | 158 | args = dict(target_name='ipython.widget', |
|
159 | 159 | data={'model_name': self._model_name, |
|
160 | 160 | 'model_module': self._model_module}) |
|
161 | 161 | if self._model_id is not None: |
|
162 | 162 | args['comm_id'] = self._model_id |
|
163 |
self. |
|
|
163 | self.comm = Comm(**args) | |
|
164 | 164 | |
|
165 |
def |
|
|
166 |
""" |
|
|
167 |
self.comm = |
|
|
165 | def _comm_changed(self, name, new): | |
|
166 | """Called when the comm is changed.""" | |
|
167 | self.comm = new | |
|
168 | 168 | self._model_id = self.model_id |
|
169 | 169 | |
|
170 | 170 | self.comm.on_msg(self._handle_msg) |
|
171 | 171 | Widget.widgets[self.model_id] = self |
|
172 | 172 | |
|
173 | 173 | # first update |
|
174 | 174 | self.send_state() |
|
175 | 175 | |
|
176 | ||
|
177 | 176 | @property |
|
178 | 177 | def model_id(self): |
|
179 | 178 | """Gets the model id of this widget. |
|
180 | 179 | |
|
181 | 180 | If a Comm doesn't exist yet, a Comm will be created automagically.""" |
|
182 | 181 | return self.comm.comm_id |
|
183 | 182 | |
|
184 | 183 | #------------------------------------------------------------------------- |
|
185 | 184 | # Methods |
|
186 | 185 | #------------------------------------------------------------------------- |
|
187 | 186 | |
|
188 | 187 | def close(self): |
|
189 | 188 | """Close method. |
|
190 | 189 | |
|
191 | 190 | Closes the underlying comm. |
|
192 | 191 | When the comm is closed, all of the widget views are automatically |
|
193 | 192 | removed from the front-end.""" |
|
194 | 193 | if self.comm is not None: |
|
195 | 194 | Widget.widgets.pop(self.model_id, None) |
|
196 | 195 | self.comm.close() |
|
197 | 196 | self.comm = None |
|
198 | 197 | |
|
199 | 198 | def send_state(self, key=None): |
|
200 | 199 | """Sends the widget state, or a piece of it, to the front-end. |
|
201 | 200 | |
|
202 | 201 | Parameters |
|
203 | 202 | ---------- |
|
204 | 203 | key : unicode, or iterable (optional) |
|
205 | 204 | A single property's name or iterable of property names to sync with the front-end. |
|
206 | 205 | """ |
|
207 | 206 | self._send({ |
|
208 | 207 | "method" : "update", |
|
209 | 208 | "state" : self.get_state(key=key) |
|
210 | 209 | }) |
|
211 | 210 | |
|
212 | 211 | def get_state(self, key=None): |
|
213 | 212 | """Gets the widget state, or a piece of it. |
|
214 | 213 | |
|
215 | 214 | Parameters |
|
216 | 215 | ---------- |
|
217 | 216 | key : unicode or iterable (optional) |
|
218 | 217 | A single property's name or iterable of property names to get. |
|
219 | 218 | """ |
|
220 | 219 | if key is None: |
|
221 | 220 | keys = self.keys |
|
222 | 221 | elif isinstance(key, string_types): |
|
223 | 222 | keys = [key] |
|
224 | 223 | elif isinstance(key, collections.Iterable): |
|
225 | 224 | keys = key |
|
226 | 225 | else: |
|
227 | 226 | raise ValueError("key must be a string, an iterable of keys, or None") |
|
228 | 227 | state = {} |
|
229 | 228 | for k in keys: |
|
230 | 229 | f = self.trait_metadata(k, 'to_json', self._trait_to_json) |
|
231 | 230 | value = getattr(self, k) |
|
232 | 231 | state[k] = f(value) |
|
233 | 232 | return state |
|
234 | 233 | |
|
235 | 234 | def set_state(self, sync_data): |
|
236 | 235 | """Called when a state is received from the front-end.""" |
|
237 | 236 | for name in self.keys: |
|
238 | 237 | if name in sync_data: |
|
239 | 238 | json_value = sync_data[name] |
|
240 | 239 | from_json = self.trait_metadata(name, 'from_json', self._trait_from_json) |
|
241 | 240 | with self._lock_property(name, json_value): |
|
242 | 241 | setattr(self, name, from_json(json_value)) |
|
243 | 242 | |
|
244 | 243 | def send(self, content): |
|
245 | 244 | """Sends a custom msg to the widget model in the front-end. |
|
246 | 245 | |
|
247 | 246 | Parameters |
|
248 | 247 | ---------- |
|
249 | 248 | content : dict |
|
250 | 249 | Content of the message to send. |
|
251 | 250 | """ |
|
252 | 251 | self._send({"method": "custom", "content": content}) |
|
253 | 252 | |
|
254 | 253 | def on_msg(self, callback, remove=False): |
|
255 | 254 | """(Un)Register a custom msg receive callback. |
|
256 | 255 | |
|
257 | 256 | Parameters |
|
258 | 257 | ---------- |
|
259 | 258 | callback: callable |
|
260 | 259 | callback will be passed two arguments when a message arrives:: |
|
261 | 260 | |
|
262 | 261 | callback(widget, content) |
|
263 | 262 | |
|
264 | 263 | remove: bool |
|
265 | 264 | True if the callback should be unregistered.""" |
|
266 | 265 | self._msg_callbacks.register_callback(callback, remove=remove) |
|
267 | 266 | |
|
268 | 267 | def on_displayed(self, callback, remove=False): |
|
269 | 268 | """(Un)Register a widget displayed callback. |
|
270 | 269 | |
|
271 | 270 | Parameters |
|
272 | 271 | ---------- |
|
273 | 272 | callback: method handler |
|
274 | 273 | Must have a signature of:: |
|
275 | 274 | |
|
276 | 275 | callback(widget, **kwargs) |
|
277 | 276 | |
|
278 | 277 | kwargs from display are passed through without modification. |
|
279 | 278 | remove: bool |
|
280 | 279 | True if the callback should be unregistered.""" |
|
281 | 280 | self._display_callbacks.register_callback(callback, remove=remove) |
|
282 | 281 | |
|
283 | 282 | #------------------------------------------------------------------------- |
|
284 | 283 | # Support methods |
|
285 | 284 | #------------------------------------------------------------------------- |
|
286 | 285 | @contextmanager |
|
287 | 286 | def _lock_property(self, key, value): |
|
288 | 287 | """Lock a property-value pair. |
|
289 | 288 | |
|
290 | 289 | The value should be the JSON state of the property. |
|
291 | 290 | |
|
292 | 291 | NOTE: This, in addition to the single lock for all state changes, is |
|
293 | 292 | flawed. In the future we may want to look into buffering state changes |
|
294 | 293 | back to the front-end.""" |
|
295 | 294 | self._property_lock = (key, value) |
|
296 | 295 | try: |
|
297 | 296 | yield |
|
298 | 297 | finally: |
|
299 | 298 | self._property_lock = (None, None) |
|
300 | 299 | |
|
301 | 300 | @contextmanager |
|
302 | 301 | def hold_sync(self): |
|
303 | 302 | """Hold syncing any state until the context manager is released""" |
|
304 | 303 | # We increment a value so that this can be nested. Syncing will happen when |
|
305 | 304 | # all levels have been released. |
|
306 | 305 | self._send_state_lock += 1 |
|
307 | 306 | try: |
|
308 | 307 | yield |
|
309 | 308 | finally: |
|
310 | 309 | self._send_state_lock -=1 |
|
311 | 310 | if self._send_state_lock == 0: |
|
312 | 311 | self.send_state(self._states_to_send) |
|
313 | 312 | self._states_to_send.clear() |
|
314 | 313 | |
|
315 | 314 | def _should_send_property(self, key, value): |
|
316 | 315 | """Check the property lock (property_lock)""" |
|
317 | 316 | to_json = self.trait_metadata(key, 'to_json', self._trait_to_json) |
|
318 | 317 | if (key == self._property_lock[0] |
|
319 | 318 | and to_json(value) == self._property_lock[1]): |
|
320 | 319 | return False |
|
321 | 320 | elif self._send_state_lock > 0: |
|
322 | 321 | self._states_to_send.add(key) |
|
323 | 322 | return False |
|
324 | 323 | else: |
|
325 | 324 | return True |
|
326 | 325 | |
|
327 | 326 | # Event handlers |
|
328 | 327 | @_show_traceback |
|
329 | 328 | def _handle_msg(self, msg): |
|
330 | 329 | """Called when a msg is received from the front-end""" |
|
331 | 330 | data = msg['content']['data'] |
|
332 | 331 | method = data['method'] |
|
333 | 332 | if not method in ['backbone', 'custom']: |
|
334 | 333 | self.log.error('Unknown front-end to back-end widget msg with method "%s"' % method) |
|
335 | 334 | |
|
336 | 335 | # Handle backbone sync methods CREATE, PATCH, and UPDATE all in one. |
|
337 | 336 | if method == 'backbone' and 'sync_data' in data: |
|
338 | 337 | sync_data = data['sync_data'] |
|
339 | 338 | self.set_state(sync_data) # handles all methods |
|
340 | 339 | |
|
341 | 340 | # Handle a custom msg from the front-end |
|
342 | 341 | elif method == 'custom': |
|
343 | 342 | if 'content' in data: |
|
344 | 343 | self._handle_custom_msg(data['content']) |
|
345 | 344 | |
|
346 | 345 | def _handle_custom_msg(self, content): |
|
347 | 346 | """Called when a custom msg is received.""" |
|
348 | 347 | self._msg_callbacks(self, content) |
|
349 | 348 | |
|
350 | 349 | def _notify_trait(self, name, old_value, new_value): |
|
351 | 350 | """Called when a property has been changed.""" |
|
352 | 351 | # Trigger default traitlet callback machinery. This allows any user |
|
353 | 352 | # registered validation to be processed prior to allowing the widget |
|
354 | 353 | # machinery to handle the state. |
|
355 | 354 | LoggingConfigurable._notify_trait(self, name, old_value, new_value) |
|
356 | 355 | |
|
357 | 356 | # Send the state after the user registered callbacks for trait changes |
|
358 | 357 | # have all fired (allows for user to validate values). |
|
359 | 358 | if self.comm is not None and name in self.keys: |
|
360 | 359 | # Make sure this isn't information that the front-end just sent us. |
|
361 | 360 | if self._should_send_property(name, new_value): |
|
362 | 361 | # Send new state to front-end |
|
363 | 362 | self.send_state(key=name) |
|
364 | 363 | |
|
365 | 364 | def _handle_displayed(self, **kwargs): |
|
366 | 365 | """Called when a view has been displayed for this widget instance""" |
|
367 | 366 | self._display_callbacks(self, **kwargs) |
|
368 | 367 | |
|
369 | 368 | def _trait_to_json(self, x): |
|
370 | 369 | """Convert a trait value to json |
|
371 | 370 | |
|
372 | 371 | Traverse lists/tuples and dicts and serialize their values as well. |
|
373 | 372 | Replace any widgets with their model_id |
|
374 | 373 | """ |
|
375 | 374 | if isinstance(x, dict): |
|
376 | 375 | return {k: self._trait_to_json(v) for k, v in x.items()} |
|
377 | 376 | elif isinstance(x, (list, tuple)): |
|
378 | 377 | return [self._trait_to_json(v) for v in x] |
|
379 | 378 | elif isinstance(x, Widget): |
|
380 | 379 | return "IPY_MODEL_" + x.model_id |
|
381 | 380 | else: |
|
382 | 381 | return x # Value must be JSON-able |
|
383 | 382 | |
|
384 | 383 | def _trait_from_json(self, x): |
|
385 | 384 | """Convert json values to objects |
|
386 | 385 | |
|
387 | 386 | Replace any strings representing valid model id values to Widget references. |
|
388 | 387 | """ |
|
389 | 388 | if isinstance(x, dict): |
|
390 | 389 | return {k: self._trait_from_json(v) for k, v in x.items()} |
|
391 | 390 | elif isinstance(x, (list, tuple)): |
|
392 | 391 | return [self._trait_from_json(v) for v in x] |
|
393 | 392 | elif isinstance(x, string_types) and x.startswith('IPY_MODEL_') and x[10:] in Widget.widgets: |
|
394 | 393 | # we want to support having child widgets at any level in a hierarchy |
|
395 | 394 | # trusting that a widget UUID will not appear out in the wild |
|
396 | 395 | return Widget.widgets[x[10:]] |
|
397 | 396 | else: |
|
398 | 397 | return x |
|
399 | 398 | |
|
400 | 399 | def _ipython_display_(self, **kwargs): |
|
401 | 400 | """Called when `IPython.display.display` is called on the widget.""" |
|
402 | 401 | # Show view. |
|
403 | 402 | if self._view_name is not None: |
|
404 | 403 | self._send({"method": "display"}) |
|
405 | 404 | self._handle_displayed(**kwargs) |
|
406 | 405 | |
|
407 | 406 | def _send(self, msg): |
|
408 | 407 | """Sends a message to the model in the front-end.""" |
|
409 | 408 | self.comm.send(msg) |
|
410 | 409 | |
|
411 | 410 | |
|
412 | 411 | class DOMWidget(Widget): |
|
413 | 412 | visible = Bool(True, help="Whether the widget is visible.", sync=True) |
|
414 | 413 | _css = Tuple(sync=True, help="CSS property list: (selector, key, value)") |
|
415 | 414 | _dom_classes = Tuple(sync=True, help="DOM classes applied to widget.$el.") |
|
416 | 415 | |
|
417 | 416 | width = CUnicode(sync=True) |
|
418 | 417 | height = CUnicode(sync=True) |
|
419 | 418 | padding = CUnicode(sync=True) |
|
420 | 419 | margin = CUnicode(sync=True) |
|
421 | 420 | |
|
422 | 421 | color = Unicode(sync=True) |
|
423 | 422 | background_color = Unicode(sync=True) |
|
424 | 423 | border_color = Unicode(sync=True) |
|
425 | 424 | |
|
426 | 425 | border_width = CUnicode(sync=True) |
|
427 | 426 | border_radius = CUnicode(sync=True) |
|
428 | 427 | border_style = CaselessStrEnum(values=[ # http://www.w3schools.com/cssref/pr_border-style.asp |
|
429 | 428 | 'none', |
|
430 | 429 | 'hidden', |
|
431 | 430 | 'dotted', |
|
432 | 431 | 'dashed', |
|
433 | 432 | 'solid', |
|
434 | 433 | 'double', |
|
435 | 434 | 'groove', |
|
436 | 435 | 'ridge', |
|
437 | 436 | 'inset', |
|
438 | 437 | 'outset', |
|
439 | 438 | 'initial', |
|
440 | 439 | 'inherit', ''], |
|
441 | 440 | default_value='', sync=True) |
|
442 | 441 | |
|
443 | 442 | font_style = CaselessStrEnum(values=[ # http://www.w3schools.com/cssref/pr_font_font-style.asp |
|
444 | 443 | 'normal', |
|
445 | 444 | 'italic', |
|
446 | 445 | 'oblique', |
|
447 | 446 | 'initial', |
|
448 | 447 | 'inherit', ''], |
|
449 | 448 | default_value='', sync=True) |
|
450 | 449 | font_weight = CaselessStrEnum(values=[ # http://www.w3schools.com/cssref/pr_font_weight.asp |
|
451 | 450 | 'normal', |
|
452 | 451 | 'bold', |
|
453 | 452 | 'bolder', |
|
454 | 453 | 'lighter', |
|
455 | 454 | 'initial', |
|
456 | 455 | 'inherit', ''] + [str(100 * (i+1)) for i in range(9)], |
|
457 | 456 | default_value='', sync=True) |
|
458 | 457 | font_size = CUnicode(sync=True) |
|
459 | 458 | font_family = Unicode(sync=True) |
|
460 | 459 | |
|
461 | 460 | def __init__(self, *pargs, **kwargs): |
|
462 | 461 | super(DOMWidget, self).__init__(*pargs, **kwargs) |
|
463 | 462 | |
|
464 | 463 | def _validate_border(name, old, new): |
|
465 | 464 | if new is not None and new != '': |
|
466 | 465 | if name != 'border_width' and not self.border_width: |
|
467 | 466 | self.border_width = 1 |
|
468 | 467 | if name != 'border_style' and self.border_style == '': |
|
469 | 468 | self.border_style = 'solid' |
|
470 | 469 | self.on_trait_change(_validate_border, ['border_width', 'border_style', 'border_color']) |
General Comments 0
You need to be logged in to leave comments.
Login now