FarmMapsLib/projects/common-map/src/lib/components/aol/gps-location/gps-location.component.ts

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2019-10-28 13:18:25 +00:00
import { Component, OnInit, Input, ViewChild, ElementRef, OnChanges, SimpleChanges } from '@angular/core';
import { MapComponent } from 'ngx-openlayers';
import Overlay from 'ol/Overlay';
import { fromLonLat, toLonLat } from 'ol/proj';
@Component({
selector: 'gps-location',
templateUrl: './gps-location.component.html',
styleUrls: ['./gps-location.component.scss']
})
export class GpsLocation implements OnInit,OnChanges{
@Input() enable:boolean;
public instance: Overlay;
@Input() position: Position;
@Input() location: number[]=[0,0];
@Input() locationTolerance: number = 0;
@Input() showHeading: boolean = false;
@Input() heading: number = 0;
@Input() headingTolerance: number = 0;
public locTolerancePixels: number = 0;
public path: string = "";
public rotate: string = "";
private resolution: number = 0;
@ViewChild('location') locationElement: ElementRef;
constructor(private map: MapComponent) {
}
recalcLocationTolerance() {
this.locTolerancePixels = this.locationTolerance / this.resolution;
}
ngOnInit() {
this.instance = new Overlay({
stopEvent:false,
positioning: 'center-center',
position: fromLonLat( this.location),
element: this.locationElement.nativeElement
});
var x = Math.tan(this.headingTolerance * Math.PI / 180)*40;
var y = Math.cos(this.headingTolerance * Math.PI / 180) * 40;
var y1 = Math.round(500 - y);
var x1 = Math.round(500 - x);
var y2 = Math.round(y1);
var x2 = Math.round(500 + x);
this.path = "M " + x2 + " " + y2 + " A 45 45,0,0,0, " + x1 + " " + y1 + " L 493 500 L 507 500 Z";
this.rotate = "rotate(" + Math.round(this.heading) + " 500 500)";
this.locTolerancePixels = this.locationTolerance;
this.map.instance.addOverlay(this.instance);
this.map.instance.getView().on('change:resolution', (evt) => {
this.resolution = evt.target.get('resolution');
this.recalcLocationTolerance();
});
}
ngOnChanges(changes: SimpleChanges) {
if (changes.position && this.instance) {
var p = changes.position.currentValue as Position;
this.instance.setPosition(fromLonLat([p.coords.longitude, p.coords.latitude]));
this.locationTolerance = p.coords.accuracy;
this.recalcLocationTolerance();
this.heading = p.coords.heading;
}
}
}