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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| import threading | ||
| import time | ||
| import ipywidgets as widgets | ||
| from traitlets import Bool, Integer, observe, Unicode | ||
| from .remote_thread import RemoteCallThread | ||
| from IPython.display import display | ||
| import numpy as np | ||
|
|
||
| from ._frontend import __frontend_version__ | ||
|
|
||
| class WidgetBase(widgets.DOMWidget): | ||
| _view_module = Unicode('nglview-js-widgets').tag(sync=True) | ||
| _model_module = Unicode('nglview-js-widgets').tag(sync=True) | ||
| _view_module_version = Unicode(__frontend_version__).tag(sync=True) | ||
| _model_module_version = Unicode(__frontend_version__).tag(sync=True) | ||
|
|
||
| frame = Integer().tag(sync=True) | ||
| loaded = Bool(False).tag(sync=False) | ||
| _component_ids = [] | ||
| _trajlist = [] | ||
| _callbacks_before_loaded = [] | ||
| _event = threading.Event() | ||
|
|
||
| def __init__(self, **kwargs): | ||
| # Extract recognized arguments | ||
| recognized_kwargs = {k: v for k, v in kwargs.items() if k in self.trait_names()} | ||
| super().__init__(**recognized_kwargs) | ||
| self._initialize_threads() | ||
|
|
||
| def _initialize_threads(self): | ||
| self._remote_call_thread = RemoteCallThread(self, registered_funcs=[]) | ||
| self._remote_call_thread.daemon = True | ||
| self._remote_call_thread.start() | ||
| self._handle_msg_thread = threading.Thread(target=self.on_msg, args=(self._handle_nglview_custom_message,)) | ||
| self._handle_msg_thread.daemon = True | ||
| self._handle_msg_thread.start() | ||
|
|
||
| def _handle_nglview_custom_message(self, widget, msg, buffers): | ||
| raise NotImplementedError() | ||
|
|
||
| def render_image(self): | ||
| image = widgets.Image() | ||
| self._js(f"this.exportImage('{image.model_id}')") | ||
| return image | ||
|
|
||
| def handle_resize(self): | ||
| self._js("this.plugin.handleResize()") | ||
|
|
||
| @observe('loaded') | ||
| def on_loaded(self, change): | ||
| # trick for firefox on Linux | ||
| time.sleep(0.1) | ||
| if change['new']: | ||
| self._fire_callbacks(self._callbacks_before_loaded) | ||
|
|
||
| def _thread_run(self, func, *args): | ||
| thread = threading.Thread(target=func, args=args) | ||
| thread.daemon = True | ||
| thread.start() | ||
| return thread | ||
|
|
||
| def _fire_callbacks(self, callbacks): | ||
| def _call(event): | ||
| for callback in callbacks: | ||
| callback(self) | ||
| self._thread_run(_call, self._event) | ||
|
|
||
| def _update_max_frame(self): | ||
| self.max_frame = max( | ||
| int(traj.n_frames) for traj in self._trajlist | ||
| if hasattr(traj, 'n_frames')) - 1 # index starts from 0 | ||
|
|
||
| def _wait_until_finished(self, timeout=0.0001): | ||
| self._event.clear() | ||
| while True: | ||
| # idle to make room for waiting for | ||
| # "finished" event sent from JS | ||
| time.sleep(timeout) | ||
| if self._event.is_set(): | ||
| # if event is set from another thread | ||
| # break while True | ||
| break | ||
|
|
||
| def _js(self, code, **kwargs): | ||
| self._remote_call('executeCode', target='Widget', args=[code], **kwargs) | ||
|
|
||
| def _remote_call(self, method_name, target='Widget', args=None, kwargs=None, **other_kwargs): | ||
| msg = self._get_remote_call_msg(method_name, target=target, args=args, kwargs=kwargs, **other_kwargs) | ||
| def callback(widget, msg=msg): | ||
| widget.send(msg) | ||
| callback._method_name = method_name | ||
| callback._msg = msg | ||
| if self.loaded: | ||
| self._remote_call_thread.q.append(callback) | ||
| else: | ||
| self._callbacks_before_loaded.append(callback) | ||
|
|
||
| def _get_remote_call_msg(self, method_name, target='Widget', args=None, kwargs=None, **other_kwargs): | ||
| msg = {'target': target, 'type': 'call_method', 'methodName': method_name, 'args': args, 'kwargs': kwargs} | ||
| msg.update(other_kwargs) | ||
| return msg | ||
|
|
||
| def _set_coordinates(self, index, movie_making=False, render_params=None): | ||
| '''update coordinates for all trajectories at index-th frame''' | ||
| render_params = render_params or {} | ||
| if self._trajlist: | ||
| coordinates_dict = {} | ||
| for trajectory in self._trajlist: | ||
| traj_index = self._ngl_component_ids.index(trajectory.id) | ||
|
|
||
| try: | ||
| if trajectory.shown: | ||
| coordinates_dict[traj_index] = trajectory.get_coordinates(index) | ||
| else: | ||
| coordinates_dict[traj_index] = np.empty((0), dtype='f4') | ||
| except (IndexError, ValueError): | ||
| coordinates_dict[traj_index] = np.empty((0), dtype='f4') | ||
|
|
||
| self.set_coordinates(coordinates_dict, | ||
| render_params=render_params, | ||
| movie_making=movie_making) | ||
| else: | ||
| print("no trajectory available") | ||
|
|
||
| def set_coordinates(self, arr_dict, movie_making=False, render_params=None): | ||
| """Used for update coordinates of a given trajectory | ||
| >>> # arr: numpy array, ndim=2 | ||
| >>> # update coordinates of 1st trajectory | ||
| >>> view.set_coordinates({0: arr})# doctest: +SKIP | ||
| """ | ||
| render_params = render_params or {} | ||
| self._coordinates_dict = arr_dict | ||
|
|
||
| buffers = [] | ||
| coordinates_meta = dict() | ||
| for index, arr in self._coordinates_dict.items(): | ||
| buffers.append(arr.astype('f4').tobytes()) | ||
| coordinates_meta[index] = index | ||
| msg = { | ||
| 'type': 'binary_single', | ||
| 'data': coordinates_meta, | ||
| } | ||
| if movie_making: | ||
| msg['movie_making'] = movie_making | ||
| msg['render_params'] = render_params | ||
|
|
||
| self.send(msg, buffers=buffers) | ||
|
|
||
| @observe('frame') | ||
| def _on_frame_changed(self, change): | ||
| self._set_coordinates(change['new']) | ||
|
|
||
| def _ipython_display_(self, **kwargs): | ||
| try: | ||
| # ipywidgets < 8 | ||
| super()._ipython_display_(**kwargs) | ||
| except AttributeError: | ||
| display(super()._repr_mimebundle_(), raw=True) |
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