New approach for draggable

src/app/cartography/cartography.module.ts

@@ -16,6 +16,7 @@ import { MapChangeDetectorRef } from './services/map-change-detector-ref';
 import { Context } from './models/context';
 import { D3_MAP_IMPORTS } from './d3-map.imports';
 import { CanvasSizeDetector } from './helpers/canvas-size-detector';
+import { MapListener } from './listeners/map-listener';
 
 
 @NgModule({
@@ -39,6 +40,7 @@ import { CanvasSizeDetector } from './helpers/canvas-size-detector';
     MapChangeDetectorRef,
     CanvasSizeDetector,
     Context,
+    MapListener,
     ...D3_MAP_IMPORTS
   ],
   exports: [ MapComponent ]

src/app/cartography/components/map/map.component.ts

@@ -22,6 +22,7 @@ import { LinkCreated } from '../../events/links';
 import { CanvasSizeDetector } from '../../helpers/canvas-size-detector';
 import { SelectionManager } from '../../managers/selection-manager';
 import { NodeWidget } from '../../widgets/node';
+import { MapListener } from '../../listeners/map-listener';
 
 
 @Component({
@@ -35,8 +36,6 @@ export class MapComponent implements OnInit, OnChanges, OnDestroy {
   @Input() drawings: Drawing[] = [];
   @Input() symbols: Symbol[] = [];
 
-  @Input('selection-manager') selectionManager: SelectionManager;
-
   @Input() width = 1500;
   @Input() height = 600;
 
@@ -60,6 +59,8 @@ export class MapComponent implements OnInit, OnChanges, OnDestroy {
     private context: Context,
     private mapChangeDetectorRef: MapChangeDetectorRef,
     private canvasSizeDetector: CanvasSizeDetector,
+    private mapListener: MapListener,
+    private selectionManager: SelectionManager,
     protected element: ElementRef,
     protected nodesWidget: NodesWidget,
     protected nodeWidget: NodeWidget,
@@ -123,6 +124,7 @@ export class MapComponent implements OnInit, OnChanges, OnDestroy {
     this.onNodeClickedSubscription.unsubscribe();
     this.onNodeDraggedSubscription.unsubscribe();
     this.onChangesDetected.unsubscribe();
+    this.mapListener.onDestroy();
   }
 
   ngOnInit() {
@@ -175,6 +177,8 @@ export class MapComponent implements OnInit, OnChanges, OnDestroy {
         this.reload();
       }
     });
+
+    this.mapListener.onInit(this.svg);
   }
 
   public createGraph(domElement: HTMLElement) {

src/app/cartography/events/draggable.ts

@@ -0,0 +1,64 @@
+import { EventEmitter } from "@angular/core";
+import { drag, DraggedElementBaseType } from "d3-drag";
+import { event } from "d3-selection";
+
+class DraggableEvent {
+  public dx: number;
+  public dy: number;
+}
+
+export class DraggableStart<T> extends DraggableEvent {
+  constructor(
+    public datum: T
+  ){
+    super();
+  }
+}
+
+export class DraggableDrag<T> extends DraggableEvent {
+  constructor(
+    public datum: T
+  ){
+    super();
+  }
+}
+
+export class DraggableEnd<T> extends DraggableEvent {
+  constructor(
+    public datum: T
+  ){
+    super();
+  }
+}
+
+export class Draggable<GElement extends DraggedElementBaseType, Datum> {
+  public start = new EventEmitter<DraggableStart<Datum>>();
+  public drag = new EventEmitter<DraggableStart<Datum>>();
+  public end = new EventEmitter<DraggableStart<Datum>>();
+
+  public call(selection) {
+    selection.call(this.behaviour());
+  }
+
+  private behaviour() {
+    return drag<GElement, Datum>()
+      .on('start', (datum: Datum) => {
+        const evt = new DraggableStart<Datum>(datum);
+        evt.dx = event.dx;
+        evt.dy = event.dy;
+        this.start.emit(evt);
+      })
+      .on('drag', (datum: Datum) => {
+        const evt = new DraggableDrag<Datum>(datum);
+        evt.dx = event.dx;
+        evt.dy = event.dy;
+        this.drag.emit(evt);
+      })
+      .on('end', (datum: Datum) => {
+        const evt = new DraggableEnd<Datum>(datum);
+        evt.dx = event.dx;
+        evt.dy = event.dy;
+        this.end.emit(evt);
+      });
+  }
+}

src/app/cartography/listeners/map-listener.ts

@@ -0,0 +1,47 @@
+import { Injectable } from "@angular/core";
+import { DrawingsWidget } from "../widgets/drawings";
+import { DraggableStart } from "../events/draggable";
+import { Drawing } from "../models/drawing";
+import { Subscription } from "rxjs";
+import { SelectionManager } from "../managers/selection-manager";
+
+
+@Injectable()
+export class MapListener {
+  private start: Subscription;
+  private drag: Subscription;
+  private end: Subscription;
+
+  constructor(
+    private drawingsWidget: DrawingsWidget,
+    private selectionManager: SelectionManager
+  ) {
+  }
+
+  public onInit(svg: any) {
+    this.start = this.drawingsWidget.draggable.start.subscribe((evt: DraggableStart<Drawing>) => {
+      let drawings = this.selectionManager.getSelectedDrawings();
+      
+      if (drawings.filter((n: Drawing) => n.drawing_id === evt.datum.drawing_id).length === 0) {
+        this.selectionManager.setSelectedDrawings([evt.datum]);
+        drawings = this.selectionManager.getSelectedDrawings();
+      }
+    });
+
+    this.drag = this.drawingsWidget.draggable.start.subscribe((evt: DraggableStart<Drawing>) => {
+      let drawings = this.selectionManager.getSelectedDrawings();
+      drawings.forEach((drawing: Drawing) => {
+        drawing.x += evt.dx;
+        drawing.y += evt.dy;
+        // this.drawingsWidget.redrawDrawing(svg, drawing);
+      });
+    });
+
+  }
+
+  public onDestroy() {
+    this.start.unsubscribe();
+    this.drag.unsubscribe();
+    this.end.unsubscribe();
+  }
+}

src/app/cartography/widgets/drawings.ts

@@ -1,4 +1,4 @@
-import { Injectable } from "@angular/core";
+import { Injectable, EventEmitter } from "@angular/core";
 
 import { Widget } from "./widget";
 import { Drawing } from "../models/drawing";
@@ -11,12 +11,22 @@ import { RectDrawingWidget } from "./drawings/rect-drawing";
 import { LineDrawingWidget } from "./drawings/line-drawing";
 import { EllipseDrawingWidget } from "./drawings/ellipse-drawing";
 import { DrawingWidget } from "./drawings/drawing-widget";
+import { event } from "d3-selection";
+import { D3DragEvent, drag } from "d3-drag";
+import { Draggable } from "../events/draggable";
 
 
 @Injectable()
 export class DrawingsWidget implements Widget {
   private drawingWidgets: DrawingWidget[] = [];
 
+  public draggable = new Draggable<SVGGElement, Drawing>();
+
+  // public onContextMenu = new EventEmitter<NodeContextMenu>();
+  // public onDrawingClicked = new EventEmitter<NodeClicked>();
+  // public onDrawingDragged = new EventEmitter<NodeDragged>();
+  // public onDrawingDragging = new EventEmitter<NodeDragging>();
+  
   constructor(
     private svgToDrawingConverter: SvgToDrawingConverter,
     private textDrawingWidget: TextDrawingWidget,
@@ -69,5 +79,6 @@ export class DrawingsWidget implements Widget {
       .exit()
         .remove();
 
+    this.draggable.call(drawing_merge);
   }
 }

src/app/components/project-map/project-map.component.html

@@ -6,7 +6,6 @@
     [drawings]="drawings"
     [width]="project.scene_width"
     [height]="project.scene_height"
-    [selection-manager]="selectionManager"
     [show-interface-labels]="project.show_interface_labels"
     [selection-tool]="tools.selection"
     [moving-tool]="tools.moving"

src/app/components/project-map/project-map.component.ts

@@ -57,13 +57,11 @@ export class ProjectMapComponent implements OnInit, OnDestroy {
 
   private inReadOnlyMode = false;
 
-  protected selectionManager: SelectionManager;
-
   @ViewChild(MapComponent) mapChild: MapComponent;
 
   @ViewChild(NodeContextMenuComponent) nodeContextMenu: NodeContextMenuComponent;
 
-  private subscriptions: Subscription[];
+  private subscriptions: Subscription[] = [];
 
   constructor(
     private route: ActivatedRoute,
@@ -76,15 +74,11 @@ export class ProjectMapComponent implements OnInit, OnDestroy {
     private projectWebServiceHandler: ProjectWebServiceHandler,
     private mapChangeDetectorRef: MapChangeDetectorRef,
     private nodeWidget: NodeWidget,
+    private selectionManager: SelectionManager,
     protected nodesDataSource: NodesDataSource,
     protected linksDataSource: LinksDataSource,
     protected drawingsDataSource: DrawingsDataSource,
-              ) {
+  ) {}
-    this.selectionManager = new SelectionManager(
-      this.nodesDataSource, this.linksDataSource, this.drawingsDataSource, new InRectangleHelper());
-
-    this.subscriptions = [];
-  }
 
   ngOnInit() {
     this.progressService.activate();