cannam@480: /**
cannam@480:  * Created by lucast on 31/05/2017.
cannam@480:  */
cannam@480: import {
cannam@480:   InspectableVerticallyBoundedComponent,
cannam@480:   VerticallyBounded,
cannam@480:   VerticalScaleRenderer,
cannam@480:   VerticalValueInspectorRenderer,
cannam@480:   WavesComponent
cannam@480: } from '../waves-base.component';
cannam@480: import {
cannam@480:   ChangeDetectionStrategy,
cannam@480:   Component,
cannam@480:   Input,
cannam@480: } from '@angular/core';
cannam@480: import {Region} from '../FeatureUtilities';
cannam@480: import Waves from 'waves-ui-piper';
cannam@480: 
cannam@480: @Component({
cannam@480:   selector: 'ugly-regions',
cannam@480:   templateUrl: '../waves-template.html',
cannam@480:   styleUrls: ['../waves-template.css'],
cannam@480:   changeDetection: ChangeDetectionStrategy.OnPush,
cannam@480:   providers: [
cannam@480:     { provide: VerticallyBounded, useExisting: RegionsComponent },
cannam@480:     { provide: VerticalScaleRenderer, useExisting: RegionsComponent },
cannam@480:     {provide: VerticalValueInspectorRenderer, useExisting: RegionsComponent },
cannam@480:     {provide: WavesComponent, useExisting: RegionsComponent}
cannam@480:   ]
cannam@480: })
cannam@480: export class RegionsComponent extends InspectableVerticallyBoundedComponent<Region[]> {
cannam@480:   private currentVerticalRange: [number, number];
cannam@480: 
cannam@480:   get range(): [number, number] {
cannam@480:     return this.currentVerticalRange;
cannam@480:   }
cannam@480: 
cannam@480:   @Input() set regions(regions: Region[]) {
cannam@480:     this.feature = regions;
cannam@480:   }
cannam@480: 
cannam@480:   protected get featureLayers(): Layer[] {
cannam@480:     this.currentVerticalRange = findVerticalRange(this.feature);
cannam@480:     return [
cannam@480:       new Waves.helpers.PianoRollLayer(
cannam@480:         this.feature,
cannam@480:         {
cannam@480:           height: this.height,
cannam@480:           color: this.colour,
cannam@480:           yDomain: this.currentVerticalRange
cannam@480:         }
cannam@480:       )
cannam@480:     ];
cannam@480:   }
cannam@480: }
cannam@480: 
cannam@480: // TODO there might be scope to create a generic utility function like this
cannam@480: function findVerticalRange(regions: Region[]): [number, number] {
cannam@480:   let [min, max] = regions.reduce((acc, region) => {
cannam@480:     const [min, max] = acc;
cannam@480:     return [Math.min (min, region.value), Math.max (max, region.value)];
cannam@480:   }, [Infinity, -Infinity]);
cannam@480:   if (min === Infinity) {
cannam@480:     min = 0;
cannam@480:     max = 1;
cannam@480:   }
cannam@480:   return [ min, max ];
cannam@480: }