packages = [ "bokeh", "numpy", "pandas", "panel==0.13.1" ]
import panel as pn import pandas as pd import param from pyodide.http import open_url MAPBOX_KEY = "pk.eyJ1IjoicGFuZWxvcmciLCJhIjoiY2s1enA3ejhyMWhmZjNobjM1NXhtbWRrMyJ9.B_frQsAVepGIe-HiOJeqvQ" class App(param.Parameterized): data = param.DataFrame(precedence=-1) view = param.DataFrame(precedence=-1) arc_view = param.DataFrame(precedence=-1) radius = param.Integer(default=50, bounds=(20, 1000)) elevation = param.Integer(default=10, bounds=(0, 50)) hour = param.Integer(default=0, bounds=(0, 23)) speed = param.Integer(default=1, bounds=(0, 10), precedence=-1) play = param.Event(label='▷') def __init__(self, **params): self.deck_gl = None super().__init__(**params) self.deck_gl = pn.pane.DeckGL( dict(self.spec), mapbox_api_key=MAPBOX_KEY, throttle={'click': 10}, sizing_mode='stretch_both', margin=0 ) self.deck_gl.param.watch(self._update_arc_view, 'click_state') self._playing = False self._cb = pn.state.add_periodic_callback( self._update_hour, 1000//self.speed, start=False ) @property def spec(self): return { "initialViewState": { "bearing": 0, "latitude": 40.7, "longitude": -73.9, "maxZoom": 15, "minZoom": 5, "pitch": 40.5, "zoom": 11 }, "layers": [self.hex_layer, self.arc_layer], "mapStyle": "mapbox://styles/mapbox/dark-v9", "views": [ {"@@type": "MapView", "controller": True} ] } @property def hex_layer(self): return { "@@type": "HexagonLayer", "autoHighlight": True, "coverage": 1, "data": self.data if self.view is None else self.view, "elevationRange": [0, 100], "elevationScale": self.elevation, "radius": self.radius, "extruded": True, "getPosition": "@@=[pickup_x, pickup_y]", "id": "8a553b25-ef3a-489c-bbe2-e102d18a3211" } @property def arc_layer(self): return { "@@type": "ArcLayer", "id": 'arc-layer', "data": self.arc_view, "pickable": True, "getWidth": 1, "getSourcePosition": "@@=[pickup_x, pickup_y]", "getTargetPosition": "@@=[dropoff_x, dropoff_y]", "getSourceColor": [0, 255, 0, 180], "getTargetColor": [240, 100, 0, 180] } def _update_hour(self): self.hour = (self.hour+1) % 24 @param.depends('view', watch=True) def _update_arc_view(self, event=None): data = self.data if self.view is None else self.view if not self.deck_gl or not self.deck_gl.click_state: self.arc_view = data.iloc[:0] return lon, lat = self.deck_gl.click_state['coordinate'] tol = 0.001 self.arc_view = data[ (df.pickup_x>=float(lon-tol)) & (df.pickup_x<=float(lon+tol)) & (df.pickup_y>=float(lat-tol)) & (df.pickup_y<=float(lat+tol)) ] @param.depends('hour', watch=True, on_init=True) def _update_hourly_view(self): self.view = self.data[self.data.hour==self.hour] @param.depends('speed', watch=True) def _update_speed(self): self._cb.period = 1000//self.speed @param.depends('play', watch=True) def _play_pause(self): if self._playing: self._cb.stop() self.param.play.label = '▷' self.param.speed.precedence = -1 else: self._cb.start() self.param.play.label = '❚❚' self.param.speed.precedence = 1 self._playing = not self._playing @param.depends('view', 'radius', 'elevation', 'arc_view', watch=True) def update_spec(self): self.deck_gl.object = dict(self.spec) url = 'https://s3.eu-west-1.amazonaws.com/assets.holoviews.org/data/nyc_taxi_wide.csv' df = pd.read_csv(open_url(url)) app = App(data=df) controls = pn.Param(app.param, sizing_mode='stretch_width', show_name=False) app.deck_gl.servable(target='plot') controls.servable(target='widgets');