/
deckgl.ts
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/
deckgl.ts
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import {div} from "@bokehjs/core/dom"
import * as p from "@bokehjs/core/properties"
import {ColumnDataSource} from "@bokehjs/models/sources/column_data_source"
import {debounce} from "debounce"
import {transform_cds_to_records} from "./data"
import {LayoutDOM, LayoutDOMView} from "@bokehjs/models/layouts/layout_dom"
import {makeTooltip} from "./tooltips"
import GL from '@luma.gl/constants';
function extractClasses() {
// Get classes for registration from standalone deck.gl
const classesDict: any = {};
const deck = (window as any).deck;
const classes = Object.keys(deck).filter(x => x.charAt(0) === x.charAt(0).toUpperCase());
for (const cls of classes) {
classesDict[cls] = deck[cls];
}
return classesDict;
}
export class DeckGLPlotView extends LayoutDOMView {
model: DeckGLPlot
jsonConverter: any
deckGL: any
_connected: any[]
_layer_map: any
connect_signals(): void {
super.connect_signals()
const {data, mapbox_api_key, tooltip, layers, initialViewState, data_sources} = this.model.properties
this.on_change([mapbox_api_key, tooltip], () => this.render())
this.on_change([data, initialViewState], () => this.updateDeck())
this.on_change([layers], () => this._update_layers())
this.on_change([data_sources], () => this._connect_sources(true))
this._layer_map = {}
this._connected = []
this._connect_sources()
}
override remove(): void {
this.deckGL.finalize()
super.remove()
}
_update_layers(): void {
this._layer_map = {}
this._update_data(true)
}
_connect_sources(render: boolean = false): void {
for (const cds of this.model.data_sources) {
if (this._connected.indexOf(cds) < 0) {
this.connect(cds.properties.data.change, () => this._update_data(true))
this._connected.push(cds)
}
}
this._update_data(render)
}
initialize(): void {
super.initialize()
if ((window as any).deck.JSONConverter) {
const {CSVLoader, Tiles3DLoader} = (window as any).loaders;
(window as any).loaders.registerLoaders([Tiles3DLoader, CSVLoader]);
const jsonConverterConfiguration: any = {
classes: extractClasses(),
// Will be resolved as `<enum-name>.<enum-value>`
enumerations: {
COORDINATE_SYSTEM: (window as any).deck.COORDINATE_SYSTEM,
GL
},
// Constants that should be resolved with the provided values by JSON converter
constants: {
Tiles3DLoader
}
};
this.jsonConverter = new (window as any).deck.JSONConverter({
configuration: jsonConverterConfiguration
});
}
}
_update_data(render: boolean = true): void {
let n = 0;
for (const layer of this.model.layers) {
let cds;
n += 1;
if ((n-1) in this._layer_map) {
cds = this.model.data_sources[this._layer_map[n-1]]
} else if (typeof layer.data != "number")
continue
else {
this._layer_map[n-1] = layer.data
cds = this.model.data_sources[layer.data]
}
layer.data = transform_cds_to_records(cds);
}
if (render)
this.updateDeck()
}
_on_click_event(event: any): void {
const click_state: any = {
coordinate: event.coordinate,
lngLat: event.coordinate,
index: event.index
}
if (event.layer)
click_state.layer = event.layer.id
this.model.clickState = click_state
}
_on_hover_event(event: any): void {
if (event.coordinate == null)
return
const hover_state: any = {
coordinate: event.coordinate,
lngLat: event.coordinate,
index: event.index
}
if (event.layer)
hover_state.layer = event.layer.id
this.model.hoverState = hover_state
}
_on_viewState_event(event: any): void {
const view_state = {...event.viewState}
delete view_state.normalize
for (const p in view_state) {
if (p.startsWith('transition'))
delete view_state[p]
}
const viewport = new (window as any).deck.WebMercatorViewport(view_state);
view_state.nw = viewport.unproject([0, 0]);
view_state.se = viewport.unproject([viewport.width, viewport.height]);
this.model.viewState = view_state
}
get child_models(): LayoutDOM[] {
return []
}
getData(): any {
const view_timeout = this.model.throttle['view'] || 200
const hover_timeout = this.model.throttle['hover'] || 100
const view_cb = debounce((event: any) => this._on_viewState_event(event), view_timeout, false)
const hover_cb = debounce((event: any) => this._on_hover_event(event), hover_timeout, false)
const data = {
...this.model.data,
layers: this.model.layers,
initialViewState: this.model.initialViewState,
onViewStateChange: view_cb,
onClick: (event: any) => this._on_click_event(event),
onHover: hover_cb
}
return data
}
updateDeck(): void {
if (!this.deckGL) {
this.render()
return
}
const data = this.getData()
if ((window as any).deck.updateDeck) {
(window as any).deck.updateDeck(data, this.deckGL)
} else {
const results = this.jsonConverter.convert(data);
this.deckGL.setProps(results);
}
}
createDeck({mapboxApiKey, container, jsonInput, tooltip} : any): void {
let deckgl;
try {
const props = this.jsonConverter.convert(jsonInput);
const getTooltip = makeTooltip(tooltip, props.layers);
deckgl = new (window as any).deck.DeckGL({
...props,
map: (window as any).mapboxgl,
mapboxApiAccessToken: mapboxApiKey,
container,
getTooltip,
width: '100%',
height: '100%'
});
} catch (err) {
console.error(err);
}
return deckgl;
}
render(): void {
super.render()
const container = div({class: "deckgl"})
const MAPBOX_API_KEY = this.model.mapbox_api_key
const tooltip = this.model.tooltip
const data = this.getData()
if ((window as any).deck.createDeck) {
this.deckGL = (window as any).deck.createDeck({
mapboxApiKey: MAPBOX_API_KEY,
container: container,
jsonInput: data,
tooltip
});
} else {
this.deckGL = this.createDeck({
mapboxApiKey: MAPBOX_API_KEY,
container: container,
jsonInput: data,
tooltip
});
}
this.shadow_el.appendChild(container)
}
after_layout(): void {
super.after_layout()
this.deckGL.redraw(true);
}
}
export namespace DeckGLPlot {
export type Attrs = p.AttrsOf<Props>
export type Props = LayoutDOM.Props & {
data: p.Property<any>
data_sources: p.Property<ColumnDataSource[]>
initialViewState: p.Property<any>
layers: p.Property<any[]>
mapbox_api_key: p.Property<string>
tooltip: p.Property<any>
clickState: p.Property<any>
hoverState: p.Property<any>
throttle: p.Property<any>
viewState: p.Property<any>
}
}
export interface DeckGLPlot extends DeckGLPlot.Attrs { }
export class DeckGLPlot extends LayoutDOM {
properties: DeckGLPlot.Props
constructor(attrs?: Partial<DeckGLPlot.Attrs>) {
super(attrs)
}
static __module__ = "panel.models.deckgl"
static {
this.prototype.default_view = DeckGLPlotView;
this.define<DeckGLPlot.Props>(({Any, Array, String, Ref}) => ({
data: [ Any ],
data_sources: [ Array(Ref(ColumnDataSource)), [] ],
clickState: [ Any, {} ],
hoverState: [ Any, {} ],
initialViewState: [ Any, {} ],
layers: [ Array(Any), [] ],
mapbox_api_key: [ String, '' ],
throttle: [ Any, {} ],
tooltip: [ Any, true ],
viewState: [ Any, {} ],
}))
this.override<DeckGLPlot.Props>({
height: 400,
width: 600
});
}
}