added service to provide canvas all over

src/app/services/canvas.service.ts

@@ -0,0 +1,19 @@
+import { Inject, Injectable, Optional, ViewChild } from '@angular/core';
+import * as Selection from 'd3-selection';
+
+@Injectable()
+export class CanvasService {
+
+  public canvas: any;
+
+  constructor() {
+  }
+
+  public get get() {
+    return this.canvas;
+  }
+
+  public set(el) {
+    this.canvas = el;
+  }
+}