Added d3 force graph to GUI2 topology
Change-Id: I6860472efaf51ea27fad74e630e687f0c6abad3d
diff --git a/web/gui2/src/main/webapp/app/view/topology/layer/forcesvg/draggable/draggable.directive.ts b/web/gui2/src/main/webapp/app/view/topology/layer/forcesvg/draggable/draggable.directive.ts
new file mode 100644
index 0000000..88faa37
--- /dev/null
+++ b/web/gui2/src/main/webapp/app/view/topology/layer/forcesvg/draggable/draggable.directive.ts
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { Directive, ElementRef, Input, OnChanges } from '@angular/core';
+import { ForceDirectedGraph, Node } from '../models';
+import * as d3 from 'd3';
+
+@Directive({
+ selector: '[onosDraggableNode]'
+})
+export class DraggableDirective implements OnChanges {
+ @Input() draggableNode: Node;
+ @Input() draggableInGraph: ForceDirectedGraph;
+
+ constructor(
+ private _element: ElementRef
+ ) {
+ }
+
+ ngOnChanges() {
+ this.applyDraggableBehaviour(
+ this._element.nativeElement,
+ this.draggableNode,
+ this.draggableInGraph);
+ }
+
+ /**
+ * A method to bind a draggable behaviour to an svg element
+ */
+ applyDraggableBehaviour(element, node: Node, graph: ForceDirectedGraph) {
+ const d3element = d3.select(element);
+
+ function started() {
+ /** Preventing propagation of dragstart to parent elements */
+ d3.event.sourceEvent.stopPropagation();
+
+ if (!d3.event.active) {
+ graph.simulation.alphaTarget(0.3).restart();
+ }
+
+ d3.event.on('drag', dragged).on('end', ended);
+
+ function dragged() {
+ node.fx = d3.event.x;
+ node.fy = d3.event.y;
+ }
+
+ function ended() {
+ if (!d3.event.active) {
+ graph.simulation.alphaTarget(0);
+ }
+
+ node.fx = null;
+ node.fy = null;
+ }
+ }
+
+ d3element.call(d3.drag()
+ .on('start', started));
+ }
+}