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@nebula.gl/layers

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A suite of 3D-enabled data editing layers, suitable for deck.gl

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import turfBearing from '@turf/bearing'; import turfDistance from '@turf/distance'; import turfTransformTranslate from '@turf/transform-translate'; import { point } from '@turf/helpers'; import { FeatureCollection, Position } from '@nebula.gl/edit-modes'; import { PointerMoveEvent, StartDraggingEvent, StopDraggingEvent } from '../event-types'; import { EditAction, ModeHandler } from './mode-handler'; // TODO edit-modes: delete handlers once EditMode fully implemented export class TranslateHandler extends ModeHandler { _geometryBeforeTranslate: FeatureCollection | null | undefined; _isTranslatable: boolean; handlePointerMove( event: PointerMoveEvent ): { editAction: EditAction | null | undefined; cancelMapPan: boolean } { let editAction: EditAction | null | undefined = null; this._isTranslatable = Boolean(this._geometryBeforeTranslate) || this.isSelectionPicked(event.picks); if (!this._isTranslatable || !event.pointerDownGroundCoords) { // Nothing to do return { editAction: null, cancelMapPan: false }; } if (event.isDragging && this._geometryBeforeTranslate) { // Translate the geometry editAction = this.getTranslateAction( event.pointerDownGroundCoords, event.groundCoords, 'translating' ); } return { editAction, cancelMapPan: true }; } handleStartDragging(event: StartDraggingEvent): EditAction | null | undefined { if (!this._isTranslatable) { return null; } this._geometryBeforeTranslate = this.getSelectedFeaturesAsFeatureCollection(); return null; } handleStopDragging(event: StopDraggingEvent): EditAction | null | undefined { let editAction: EditAction | null | undefined = null; if (this._geometryBeforeTranslate) { // Translate the geometry editAction = this.getTranslateAction( event.pointerDownGroundCoords, event.groundCoords, 'translated' ); this._geometryBeforeTranslate = null; } return editAction; } getCursor({ isDragging }: { isDragging: boolean }): string { if (this._isTranslatable) { return 'move'; } return isDragging ? 'grabbing' : 'grab'; } getTranslateAction( startDragPoint: Position, currentPoint: Position, editType: string ): EditAction | null | undefined { if (!this._geometryBeforeTranslate) { return null; } const p1 = point(startDragPoint); const p2 = point(currentPoint); const distanceMoved = turfDistance(p1, p2); const direction = turfBearing(p1, p2); const movedFeatures = turfTransformTranslate( // @ts-ignore this._geometryBeforeTranslate, distanceMoved, direction ); let updatedData = this.getImmutableFeatureCollection(); const selectedIndexes = this.getSelectedFeatureIndexes(); for (let i = 0; i < selectedIndexes.length; i++) { const selectedIndex = selectedIndexes[i]; const movedFeature = movedFeatures.features[i]; updatedData = updatedData.replaceGeometry(selectedIndex, movedFeature.geometry); } return { updatedData: updatedData.getObject(), editType, featureIndexes: selectedIndexes, editContext: null, }; } }