AW1873 labels

projects/common-map/src/fm-map/components/aol/item-vector-source/item-vector-source.component.ts

@@ -1,6 +1,6 @@
-import { Component, Host, Input, Output, EventEmitter, OnInit, OnChanges, SimpleChanges, forwardRef, Inject, InjectionToken } from '@angular/core';
+import { Component, Host, Input, Output, EventEmitter, OnInit, OnChanges, SimpleChanges, forwardRef, Inject, InjectionToken, OnDestroy } from '@angular/core';
 import { LayerVectorComponent, SourceVectorComponent, MapComponent } from 'ngx-openlayers';
-import { ItemService, ItemTypeService, IItem, IItemType } from '@farmmaps/common';
+import { ItemService, ItemTypeService, IItem, IItemType, FolderService } from '@farmmaps/common';
 
 import { Feature } from 'ol';
 import { Point, Geometry } from 'ol/geom';
@@ -17,6 +17,8 @@ import { GeoJSON } from 'ol/format';
 import { Select } from 'ol/interaction';
 import { IStyles } from '../../../models/style.cache';
 import { FeatureIconService } from '../../../services/feature-icon.service';
+import { Subscription } from 'rxjs';
+import { getCenter } from 'ol/extent';
 
 @Component({
   selector: 'fm-map-item-source-vector',
@@ -25,7 +27,7 @@ import { FeatureIconService } from '../../../services/feature-icon.service';
     { provide: SourceVectorComponent, useExisting: forwardRef(() => ItemVectorSourceComponent) }
   ]
 })
-export class ItemVectorSourceComponent extends SourceVectorComponent implements OnInit, OnChanges {
+export class ItemVectorSourceComponent extends SourceVectorComponent implements OnInit, OnDestroy, OnChanges {
   instance: Vector<Geometry>;
   private _format: GeoJSON;
   private _select: Select;
@@ -38,8 +40,10 @@ export class ItemVectorSourceComponent extends SourceVectorComponent implements
   @Output() onFeatureSelected: EventEmitter<Feature<Geometry>> = new EventEmitter<Feature<Geometry>>();
   @Output() onFeatureHover: EventEmitter<Feature<Geometry>> = new EventEmitter<Feature<Geometry>>();
   private stylesCache: IStyles = {};
+  private labelToolSettings = { showFieldName: true, showCropName: true, showArea: false, showCentroid: false };
+  private sub: Subscription;
 
-  constructor(@Host() private layer: LayerVectorComponent, private itemService: ItemService, private map: MapComponent, private itemTypeService: ItemTypeService, private featureIconService$: FeatureIconService) {
+  constructor(@Host() private layer: LayerVectorComponent, private itemService: ItemService, private map: MapComponent, private itemTypeService: ItemTypeService, private featureIconService$: FeatureIconService, private folderService: FolderService) {
     super(layer);
     this._format = new GeoJSON();  
   }
@@ -76,6 +80,14 @@ export class ItemVectorSourceComponent extends SourceVectorComponent implements
   }
 
   ngOnInit() {
+    this.sub = this.folderService.getFolder('my_settings').subscribe(
+      userSettingsRoot => {
+        this.itemService.getChildItemList(userSettingsRoot.code, 'vnd.farmmaps.itemtype.settings.general').subscribe(
+            items => {
+              if (items && items.length > 0) this.labelToolSettings = items[0].data.labelToolSettings;
+            }
+        )
+      });  
     this.strategy = loadingstrategy.bbox;
     this.format = new GeoJSON();
     this._select = new Select({
@@ -133,7 +145,8 @@ export class ItemVectorSourceComponent extends SourceVectorComponent implements
             fill: new style.Fill({
               color: fillColor
             }),
-            geometry: (feature: Feature<Geometry>) => this.geometry(feature)
+            geometry: (feature: Feature<Geometry>) => this.geometry(feature), 
+            text: this.getTextForCropField(feature)
           });
         } else {
           key = 'file';
@@ -153,6 +166,10 @@ export class ItemVectorSourceComponent extends SourceVectorComponent implements
     });
   }
 
+  ngOnDestroy(): void {
+    if (this.sub) this.sub.unsubscribe();
+  }
+
   ngOnChanges(changes: SimpleChanges) {
     if (changes["features"] && this.instance) {
       this.instance.clear(true);
@@ -188,4 +205,24 @@ export class ItemVectorSourceComponent extends SourceVectorComponent implements
       }
     }
   }
+  
+  getTextForCropField(feature): style.Text {
+    if (!this.labelToolSettings) return null;
+    let displayText = '';
+    if (this.labelToolSettings.showFieldName) displayText += feature.get('name') + '\n';
+    if (this.labelToolSettings.showCropName) displayText += feature.get('cropTypeName') + '\n';
+    if (this.labelToolSettings.showArea) displayText += feature.get('area') + 'ha\n';
+    if (this.labelToolSettings.showCentroid) displayText += this.getCentroid(feature);
+    
+    return new style.Text({
+      font: '13px Calibri,sans-serif',
+      fill: new style.Fill({ color: '#ffffff' }),
+      stroke: new style.Stroke({ color: '#000000', width: 2 }),
+      text: displayText
+    });
+  }
+
+  private getCentroid(feature: Feature<Geometry>) {
+    return null;
+  }
 }