Aw5739 Add ngx openlayers

projects/ngx-openlayers/src/lib/tilegrid.component.ts

@@ -0,0 +1,43 @@
+import { Component, Input, OnChanges, OnInit, SimpleChanges } from '@angular/core';
+import { createXYZ } from 'ol/tilegrid';
+import TileGrid from 'ol/tilegrid/TileGrid';
+import { Extent } from 'ol/extent';
+import { Coordinate } from 'ol/coordinate';
+import { Size } from 'ol/size';
+
+@Component({
+  selector: 'aol-tilegrid',
+  template: '',
+})
+export class TileGridComponent implements OnInit, OnChanges {
+  @Input()
+  extent: Extent;
+  @Input()
+  maxZoom: number;
+  @Input()
+  minZoom: number;
+  @Input()
+  tileSize: number | Size;
+  @Input()
+  origin?: Coordinate;
+  @Input()
+  resolutions: number[];
+
+  instance: TileGrid;
+
+  ngOnInit() {
+    if (!this.resolutions) {
+      this.instance = createXYZ(this);
+    } else {
+      this.instance = new TileGrid(this);
+    }
+  }
+
+  ngOnChanges(changes: SimpleChanges) {
+    if (!this.resolutions) {
+      this.instance = createXYZ(this);
+    } else {
+      this.instance = new TileGrid(this);
+    }
+  }
+}