animation frame controller

src/folk-graph.ts

@@ -1,9 +1,9 @@
-import { DOMRectTransform } from './common/DOMRectTransform.ts';
 import { FolkBaseSet } from './folk-base-set.ts';
 import { PropertyValues } from '@lit/reactive-element';
 import { Layout } from 'webcola';
 import { FolkShape } from './folk-shape.ts';
 import { FolkArrow } from './folk-arrow.ts';
+import { AnimationFrameController, AnimationFrameControllerHost } from './common/animation-frame-controller.ts';
 
 type ColaNode = {
   id: FolkShape;
@@ -19,29 +19,29 @@ type ColaLink = {
   target: FolkShape;
 };
 
-export class FolkGraph extends FolkBaseSet {
+export class FolkGraph extends FolkBaseSet implements AnimationFrameControllerHost {
   static override tagName = 'folk-graph';
 
   private graphSim: Layout;
-  private animationFrameId?: number;
   private colaNodes: Map<FolkShape, ColaNode> = new Map();
   private colaLinks: Map<FolkArrow, ColaLink> = new Map();
+  #rAF = new AnimationFrameController(this);
 
   constructor() {
     super();
     this.graphSim = new Layout();
   }
 
+  render() {}
+
   connectedCallback() {
     super.connectedCallback();
-    this.startSimulation();
+    this.#rAF.start();
   }
 
   disconnectedCallback() {
     super.disconnectedCallback();
-    if (this.animationFrameId) {
-      cancelAnimationFrame(this.animationFrameId);
-    }
+    this.#rAF.stop();
     this.colaNodes.clear();
     this.colaLinks.clear();
   }
@@ -51,21 +51,35 @@ export class FolkGraph extends FolkBaseSet {
     this.updateGraph();
   }
 
+  tick() {
+    this.graphSim.start(1, 0, 0, 0, true, false);
+
+    for (const node of this.graphSim.nodes() as ColaNode[]) {
+      const shape = node.id;
+      if (shape !== document.activeElement) {
+        shape.x = node.x - shape.width / 2;
+        shape.y = node.y - shape.height / 2;
+      } else {
+        const rect = shape.getTransformDOMRect();
+        node.x = rect.center.x;
+        node.y = rect.center.y;
+      }
+    }
+  }
+
   private updateGraph() {
-    // Clear existing nodes and links
     this.colaNodes.clear();
     this.colaLinks.clear();
 
     // Create nodes for shapes
     for (const element of this.sourceElements) {
       if (!(element instanceof FolkShape)) continue;
-      const rect = this.sourcesMap.get(element);
-      if (!(rect instanceof DOMRectTransform)) continue;
+      const rect = element.getTransformDOMRect();
 
       const node: ColaNode = {
         id: element,
-        x: rect.x + rect.width / 2,
-        y: rect.y + rect.height / 2,
+        x: rect.center.x,
+        y: rect.center.y,
         width: rect.width,
         height: rect.height,
         rotation: rect.rotation,
@@ -104,28 +118,4 @@ export class FolkGraph extends FolkBaseSet {
 
     this.graphSim.nodes(nodes).links(links).linkDistance(250).avoidOverlaps(true).handleDisconnected(true);
   }
-
-  private startSimulation() {
-    const step = () => {
-      this.graphSim.start(1, 0, 0, 0, true, false);
-
-      for (const node of this.graphSim.nodes() as ColaNode[]) {
-        const shape = node.id;
-        const rect = this.sourcesMap.get(shape);
-        if (!(rect instanceof DOMRectTransform)) continue;
-
-        if (shape !== document.activeElement) {
-          shape.x = node.x - rect.width / 2;
-          shape.y = node.y - rect.height / 2;
-        } else {
-          node.x = rect.x + rect.width / 2;
-          node.y = rect.y + rect.height / 2;
-        }
-      }
-
-      this.animationFrameId = requestAnimationFrame(step);
-    };
-
-    this.animationFrameId = requestAnimationFrame(step);
-  }
 }