76 lines
2.6 KiB
TypeScript
76 lines
2.6 KiB
TypeScript
import { Component, Injectable,ViewChild,AfterViewInit} from '@angular/core';
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import { Feature } from 'ol';
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import * as extent from 'ol/extent';
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import * as render from 'ol/render';
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import { Store } from '@ngrx/store';
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import * as mapReducers from '../../reducers/map.reducer';
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import { commonReducers,ItemTypeService,AppConfig } from '@farmmaps/common';
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import { AbstractFeatureListFeatureComponent } from '../feature-list-feature/feature-list-feature.component';
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import { ForItemType } from '../for-item/for-itemtype.decorator';
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import {getArea} from 'ol/sphere';
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import * as style from 'ol/style';
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@ForItemType("vnd.farmmaps.itemtype.cropfield")
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@Injectable()
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@Component({
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selector: 'fm-map-feature-list-feature-cropfield',
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templateUrl: './feature-list-feature-cropfield.component.html',
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styleUrls: ['./feature-list-feature-cropfield.component.scss']
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})
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export class FeatureListFeatureCropfieldComponent extends AbstractFeatureListFeatureComponent implements AfterViewInit {
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@ViewChild('canvas') canvas;
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@ViewChild('container') container;
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constructor(store: Store<mapReducers.State | commonReducers.State>, itemTypeService: ItemTypeService,config:AppConfig) {
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super(store, itemTypeService,config);
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}
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areaInHa(feature:Feature):number {
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if(!feature) return 0;
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// get area from faeture if 0 calculate from polygon
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let a = feature.get('area');
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if(a) return a;
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return getArea(feature.getGeometry(),{projectio:"EPSG:3857"}) / 10000;
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}
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render(canvas,width,height,feature:Feature) {
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let renderContext = render.toContext(canvas.getContext( '2d'),{ size: [width, height] });
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let strokeStyle = new style.Style({
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stroke: new style.Stroke({ color: 'black',width:1.5 })
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});
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let geom = feature.getGeometry().clone(),
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line = geom.getCoordinates()[0],
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e = extent.boundingExtent( line );
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let dxy = extent.getCenter(e),
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sxy = [
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(width - 2 ) / extent.getWidth(e),
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(height - 2 ) / extent.getHeight(e)
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];
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let dx = dxy[0],
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dy = dxy[1],
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sx = sxy[0],
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sy = sxy[1];
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geom.translate( -dx, -dy );
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geom.scale( Math.min(sx, sy), -Math.min(sx, sy));
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geom.translate( width / 2, height / 2 );
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renderContext.setStyle( strokeStyle );
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renderContext.drawGeometry( geom );
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}
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ngAfterViewInit() {
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this.render(this.canvas.nativeElement,
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this.container.nativeElement.offsetWidth,
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this.container.nativeElement.offsetHeight,
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this.feature);
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}
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}
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