Implement draglisteners, make polygon draggable.

src/Components/Point.ts

@@ -8,26 +8,30 @@ import {
   Vector3,
 } from "three";
 import Text from "./Text";
-import { Collider, Component, Draggable } from "./interfaces";
+import { Collider, Component, DragListener, Draggable } from "./interfaces";
 
 type PointOptions = {
   label?: boolean;
   decimals?: number;
   color?: string;
   draggable?: Draggable;
+  dragListeners?: ((point: Point) => void)[];
 };
 
 const defaultPointOptions = {
   color: "#FAA307",
   draggable: undefined,
   decimals: 1,
   label: false,
+  dragListeners: [],
 };
 
-class Point extends Component implements Collider {
+class Point extends Component implements Collider, DragListener<Point> {
+  dragListeners: ((point: Point) => void)[];
+
   constructor(x = 0, y = 0, options?: PointOptions) {
     super();
-    const { color, draggable, decimals, label } = {
+    const { color, draggable, decimals, label, dragListeners } = {
       ...defaultPointOptions,
       ...options,
     };
@@ -48,6 +52,7 @@ class Point extends Component implements Collider {
     this.add(strokeMesh);
     // set position of the mesh
     this.position.set(x, y, 2);
+    this.dragListeners = dragListeners ?? [];
 
     if (label) {
       const text = new Text(
@@ -65,6 +70,10 @@ class Point extends Component implements Collider {
     }
   }
 
+  addDragListener(listener: (point: Point) => void) {
+    this.dragListeners.push(listener);
+  }
+
   collidesWith(other: Object3D): boolean {
     const box1 = new Box3().setFromObject(this);
     const box2 = new Box3().setFromObject(other);
@@ -100,6 +109,7 @@ class Point extends Component implements Collider {
       message: "Point has been moved",
       position: this.position,
     }); // Dispatch the drag event
+    this.dragListeners.forEach((fn) => fn(this));
   }
 
   update(camera: THREE.OrthographicCamera) {

src/Components/Shape.ts

@@ -11,18 +11,22 @@ import {
 } from "three";
 import { toVector2 } from "../utils";
 import Line from "./Line";
-import { Collider, Component } from "./interfaces";
+import { Collider, Component, DragListener, Draggable } from "./interfaces";
 import { InputPosition } from "./types";
 
 export type PolygonOptions = {
   color?: number;
   fill?: boolean;
   opacity?: number;
+  draggable?: Draggable;
+  dragListeners?: ((point: Polygon) => void)[];
 };
 
 export const defaultShapeOptions: PolygonOptions = {
   color: 0xfaa307,
   opacity: 0.6,
+  draggable: undefined,
+  dragListeners: [],
 };
 
 type PolygonVertices = [
@@ -32,16 +36,19 @@ type PolygonVertices = [
   ...InputPosition[]
 ];
 
-class Polygon extends Component implements Collider {
-  draggable = undefined;
+class Polygon extends Component implements Collider, DragListener<Polygon> {
   vertices: PolygonVertices;
   color: number;
   object: Object3D;
+  dragListeners: ((value: Polygon) => void)[];
 
   constructor(vertices: PolygonVertices, options?: PolygonOptions) {
     super();
 
-    const { color, opacity } = { ...defaultShapeOptions, ...options };
+    const { color, opacity, draggable, dragListeners } = {
+      ...defaultShapeOptions,
+      ...options,
+    };
 
     const shape = new Shape(vertices.map((e) => toVector2(e)));
     const material = new MeshBasicMaterial({
@@ -53,8 +60,9 @@ class Polygon extends Component implements Collider {
 
     const mesh = new Mesh(geometry, material);
     mesh.scale.set(1, 1, 1);
-    this.add(mesh);
-    this.object = mesh;
+    this.geometry = mesh.geometry;
+    this.material = mesh.material;
+    this.position.setZ(1.5);
 
     const group = new Group();
     const lines = [];
@@ -74,7 +82,18 @@ class Polygon extends Component implements Collider {
     this.object = group;
     this.vertices = vertices;
     this.color = color ?? 0xfaa307;
+    this.draggable = draggable;
+    this.dragListeners = dragListeners ?? [];
   }
+
+  addDragListener(listener: (value: Polygon) => void) {
+    this.dragListeners.push(listener);
+  }
+
+  dragUpdate(): void {
+    this.dragListeners.forEach((fn) => fn(this));
+  }
+
   collidesWith(other: Object3D): boolean {
     const box1 = new Box3().setFromObject(this);
     const box2 = new Box3().setFromObject(other);

src/Components/interfaces.ts

@@ -21,6 +21,12 @@ export interface Collider extends Object3D {
   distanceTo(other: Object3D): number;
 }
 
+export interface DragListener<T> {
+  dragListeners: ((value: T) => void)[];
+  dragUpdate(): void;
+  addDragListener: (listener: (value: T) => void) => void;
+}
+
 export type ConstrainFunction = (x: number, y: number) => [number, number];
 
 export type Draggable =

src/Controls/DragControls.ts

@@ -84,7 +84,6 @@ class DragControls extends EventDispatcher {
         }
 
         this.dispatchEvent({ type: "drag", object: _selected });
-
         return;
       }
 

src/Graphica.ts

@@ -137,7 +137,6 @@ class Graphica {
 
     dragControls.addEventListener("dragstart", function (event) {
       controls.enabled = false;
-
       const draggedObject = event.object;
       draggedObject.is_dragged = true;
       draggedObject.userData.initialPosition = draggedObject.position.clone();
@@ -170,7 +169,6 @@ class Graphica {
 
     dragControls.addEventListener("dragend", function (event) {
       controls.enabled = true;
-
       const draggedObject = event.object;
       draggedObject.is_dragged = false;
     });