feat(behavior): hide elements when zooming, scrolling and dragging canvas

packages/g6/__tests__/demos/behavior-optimize-canvas.ts

@@ -0,0 +1,31 @@
+import { Graph } from '@/src';
+import data from '@@/dataset/cluster.json';
+
+export const behaviorOptimizeCanvas: TestCase = async (context) => {
+  const graph = new Graph({
+    ...context,
+    data,
+    layout: {
+      type: 'd3-force',
+    },
+    node: {
+      style: {
+        iconSrc: 'https://gw.alipayobjects.com/zos/basement_prod/012bcf4f-423b-4922-8c24-32a89f8c41ce.svg',
+        labelFontSize: 8,
+        labelText: (datum) => datum.id,
+        size: 20,
+      },
+    },
+    edge: {
+      style: {
+        labelFontSize: 8,
+        labelText: (datum) => datum.id,
+      },
+    },
+    behaviors: ['drag-canvas', 'zoom-canvas', 'scroll-canvas', 'optimize-canvas'],
+  });
+
+  await graph.render();
+
+  return graph;
+};

packages/g6/__tests__/demos/index.ts

@@ -15,6 +15,7 @@ export { behaviorExpandCollapseNode } from './behavior-expand-collapse-node';
 export { behaviorFocusElement } from './behavior-focus-element';
 export { behaviorHoverActivate } from './behavior-hover-activate';
 export { behaviorLassoSelect } from './behavior-lasso-select';
+export { behaviorOptimizeCanvas } from './behavior-optimize-canvas';
 export { behaviorScrollCanvas } from './behavior-scroll-canvas';
 export { behaviorZoomCanvas } from './behavior-zoom-canvas';
 export { caseIndentedTree } from './case-indented-tree';

packages/g6/__tests__/unit/behaviors/optimize-canvas.spec.ts

@@ -0,0 +1,35 @@
+import { behaviorOptimizeCanvas } from '@/__tests__/demos';
+import { GraphEvent, type Graph } from '@/src';
+import { createDemoGraph } from '@@/utils';
+
+describe('behavior optimize canvas', () => {
+  let graph: Graph;
+
+  beforeAll(async () => {
+    graph = await createDemoGraph(behaviorOptimizeCanvas, { animation: false });
+  });
+
+  it('viewport', async () => {
+    await expect(graph).toMatchSnapshot(__filename);
+
+    graph.emit(GraphEvent.BEFORE_TRANSFORM, {
+      type: GraphEvent.BEFORE_TRANSFORM,
+      data: {
+        mode: 'relative',
+        translate: [0, -3],
+      },
+    });
+    await expect(graph).toMatchSnapshot(__filename, 'viewport-change');
+    graph.emit(GraphEvent.AFTER_TRANSFORM, {
+      type: GraphEvent.AFTER_TRANSFORM,
+      data: {
+        mode: 'relative',
+        translate: [0, -1],
+      },
+    });
+  });
+
+  it('destroy', () => {
+    graph.destroy();
+  });
+});

packages/g6/src/behaviors/index.ts

@@ -9,6 +9,7 @@ export { DragElementForce } from './drag-element-force';
 export { FocusElement } from './focus-element';
 export { HoverActivate } from './hover-activate';
 export { LassoSelect } from './lasso-select';
+export { OptimizeCanvas } from './optimize-canvas';
 export { ScrollCanvas } from './scroll-canvas';
 export { ZoomCanvas } from './zoom-canvas';
 
@@ -23,5 +24,6 @@ export type { DragElementForceOptions } from './drag-element-force';
 export type { FocusElementOptions } from './focus-element';
 export type { HoverActivateOptions } from './hover-activate';
 export type { LassoSelectOptions } from './lasso-select';
+export type { OptimizeCanvasOptions } from './optimize-canvas';
 export type { ScrollCanvasOptions } from './scroll-canvas';
 export type { ZoomCanvasOptions } from './zoom-canvas';

packages/g6/src/behaviors/optimize-canvas.ts

@@ -0,0 +1,135 @@
+import type { BaseStyleProps, DisplayObject } from '@antv/g';
+import { debounce, isFunction } from '@antv/util';
+import { GraphEvent } from '../constants';
+import type { RuntimeContext } from '../runtime/types';
+import type { ViewportEvent } from '../utils/event';
+import { setVisibility } from '../utils/visibility';
+import type { BaseBehaviorOptions } from './base-behavior';
+import { BaseBehavior } from './base-behavior';
+
+/**
+ * <zh/> 画布优化交互配置项
+ *
+ * <en/> Canvas optimization behavior options
+ */
+export interface OptimizeCanvasOptions extends BaseBehaviorOptions {
+  /**
+   * <zh/> 是否启用画布优化功能
+   *
+   * <en/> Whether to enable canvas optimization function
+   * @defaultValue true
+   */
+  enable?: boolean | ((event: ViewportEvent) => boolean);
+  /**
+   * <zh/> 始终保留的图形类名。操作画布过程中会隐藏元素reservedShapes（除了指定类名的图形），以提高性能
+   *
+   * <en/> Persistently reserved shape classnames. Elements are hidden during canvas manipulation (except for shapes with specified classnames) to enhance performance.
+   * @defaultValue `{ node: ['key'] }`
+   */
+  shapes?: {
+    node?: string[];
+    edge?: string[];
+    combo?: string[];
+  };
+  /**
+   * <zh/> 设置防抖时间
+   *
+   * <en/> Set debounce time
+   * @defaultValue 200
+   */
+  debounce?: number;
+}
+
+/**
+ * <zh/> 操作画布过程中隐藏元素
+ *
+ * <en/> Hide elements during canvas operations (dragging, zooming, scrolling)
+ */
+export class OptimizeCanvas extends BaseBehavior<OptimizeCanvasOptions> {
+  static defaultOptions: Partial<OptimizeCanvasOptions> = {
+    enable: true,
+    debounce: 200,
+    shapes: { node: ['key'] },
+  };
+
+  private isVisible: boolean = true;
+
+  constructor(context: RuntimeContext, options: OptimizeCanvasOptions) {
+    super(context, Object.assign({}, OptimizeCanvas.defaultOptions, options));
+    this.bindEvents();
+  }
+
+  public update(options: Partial<OptimizeCanvasOptions>) {
+    super.update(options);
+    this.bindEvents();
+  }
+
+  private filterShapes = (shapes: DisplayObject[], classnames?: string[]) => {
+    return shapes.filter((shape) => shape.className && !classnames?.includes(shape.className));
+  };
+
+  private setElementsVisibility = (
+    elements: DisplayObject[],
+    visibility: BaseStyleProps['visibility'],
+    excludedClassnames?: string[],
+  ) => {
+    elements.forEach((element) => {
+      setVisibility(
+        element,
+        visibility,
+        excludedClassnames && ((shapes) => this.filterShapes(shapes, excludedClassnames)),
+      );
+    });
+  };
+
+  private hideShapes = (event: ViewportEvent) => {
+    if (!this.validate(event) || !this.isVisible) return;
+    console.log('before event', event);
+
+    const { element } = this.context;
+    const { shapes = {} } = this.options;
+    this.setElementsVisibility(element!.getNodes(), 'hidden', shapes.node);
+    this.setElementsVisibility(element!.getEdges(), 'hidden', shapes.edge);
+    this.setElementsVisibility(element!.getCombos(), 'hidden', shapes.combo);
+    this.isVisible = false;
+  };
+
+  private showShapes = debounce((event: ViewportEvent) => {
+    if (!this.validate(event) || this.isVisible) return;
+    console.log('after event', event);
+
+    const { element } = this.context;
+    this.setElementsVisibility(element!.getNodes(), 'visible');
+    this.setElementsVisibility(element!.getEdges(), 'visible');
+    this.setElementsVisibility(element!.getCombos(), 'visible');
+    this.isVisible = true;
+  }, this.options.debounce);
+
+  private bindEvents() {
+    const { graph } = this.context;
+    this.unbindEvents();
+
+    graph.on(GraphEvent.BEFORE_TRANSFORM, this.hideShapes);
+    graph.on(GraphEvent.AFTER_TRANSFORM, this.showShapes);
+  }
+
+  private unbindEvents() {
+    const { graph } = this.context;
+
+    graph.off(GraphEvent.BEFORE_TRANSFORM, this.hideShapes);
+    graph.off(GraphEvent.AFTER_TRANSFORM, this.showShapes);
+  }
+
+  private validate(event: ViewportEvent) {
+    if (this.destroyed) return false;
+
+    const { enable } = this.options;
+    if (isFunction(enable)) return enable(event);
+    return !!enable;
+  }
+
+  public destroy() {
+    this.unbindEvents();
+    super.destroy();
+  }
+}

packages/g6/src/registry/build-in.ts

@@ -10,6 +10,7 @@ import {
   FocusElement,
   HoverActivate,
   LassoSelect,
+  OptimizeCanvas,
   ScrollCanvas,
   ZoomCanvas,
 } from '../behaviors';
@@ -94,18 +95,19 @@ export const BUILT_IN_EXTENSIONS: ExtensionRegistry = {
     translate: Translate,
   },
   behavior: {
-    'zoom-canvas': ZoomCanvas,
+    'brush-select': BrushSelect,
+    'click-select': ClickSelect,
+    'collapse-expand': CollapseExpand,
+    'create-edge': CreateEdge,
     'drag-canvas': DragCanvas,
-    'drag-element': DragElement,
     'drag-element-force': DragElementForce,
-    'scroll-canvas': ScrollCanvas,
-    'collapse-expand': CollapseExpand,
-    'click-select': ClickSelect,
-    'hover-activate': HoverActivate,
+    'drag-element': DragElement,
     'focus-element': FocusElement,
-    'create-edge': CreateEdge,
-    'brush-select': BrushSelect,
+    'hover-activate': HoverActivate,
     'lasso-select': LassoSelect,
+    'optimize-canvas': OptimizeCanvas,
+    'scroll-canvas': ScrollCanvas,
+    'zoom-canvas': ZoomCanvas,
   },
   combo: {
     circle: CircleCombo,

packages/g6/src/utils/visibility.ts

@@ -10,13 +10,20 @@ const PropertyKey = 'visibility';
  * <en/> Set the visibility of the shape instance
  * @param shape - <zh/> 图形实例 | <en/> shape instance
  * @param visibility - <zh/> 可见性 | <en/> visibility
+ * @param filter - <zh/> 筛选出需要设置可见性的图形 | <en/> Filter out the shapes that need to set visibility
  * @remarks
  * <zh/> 在设置 enableCSSParsing 为 false 的情况下，复合图形无法继承父属性，因此需要对所有子图形应用相同的可见性
  *
  * <en/> After setting enableCSSParsing to false, the compound shape cannot inherit the parent attribute, so the same visibility needs to be applied to all child shapes
  */
-export function setVisibility(shape: DisplayObject, visibility: BaseStyleProps['visibility']) {
-  const shapes = [shape, ...getDescendantShapes(shape)];
+export function setVisibility(
+  shape: DisplayObject,
+  visibility: BaseStyleProps['visibility'],
+  filter?: (shapes: DisplayObject[]) => DisplayObject[],
+) {
+  let shapes = [shape, ...getDescendantShapes(shape)];
+
+  if (filter) shapes = filter?.(shapes);
 
   shapes.forEach((sp) => {
     if (!hasCachedStyle(sp, PropertyKey)) cacheStyle(sp, PropertyKey);

packages/site/.dumirc.ts

@@ -16,7 +16,7 @@ export default defineConfig({
       content: 'A Graph Visualization Framework in JavaScript',
     },
   ],
-  mako: {},
+  // mako: {},
   themeConfig: {
     title: 'G6',
     description: 'A Graph Visualization Framework in JavaScript',

packages/site/examples/behavior/canvas/demo/meta.json

@@ -27,6 +27,22 @@
         "en": "Scroll Y"
       },
       "screenshot": "https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*c5DCSoAYsZQAAAAAAAAAAAAADmJ7AQ/original"
+    },
+    {
+      "filename": "zoom.js",
+      "title": {
+        "zh": "缩放画布",
+        "en": "Zoom Canvas"
+      },
+      "screenshot": "https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*1AXoRY9Bw-0AAAAAAAAAAAAADmJ7AQ/original"
+    },
+    {
+      "filename": "optimize.js",
+      "title": {
+        "zh": "拖拽缩放画布时隐藏元素",
+        "en": "Hide Elements When Dragging and Zooming"
+      },
+      "screenshot": "https://mdn.alipayobjects.com/huamei_qa8qxu/afts/img/A*AZ4IRJkIZr8AAAAAAAAAAAAADmJ7AQ/original"
     }
   ]
 }

packages/site/examples/behavior/canvas/demo/optimize.js

@@ -0,0 +1,27 @@
+import { Graph } from '@antv/g6';
+
+const graph = new Graph({
+  container: 'container',
+  layout: {
+    type: 'grid',
+  },
+  data: {
+    nodes: [{ id: 'node1' }, { id: 'node2' }, { id: 'node3' }, { id: 'node4' }, { id: 'node5' }],
+    edges: [
+      { source: 'node1', target: 'node2' },
+      { source: 'node1', target: 'node3' },
+      { source: 'node1', target: 'node4' },
+      { source: 'node2', target: 'node3' },
+      { source: 'node3', target: 'node4' },
+      { source: 'node4', target: 'node5' },
+    ],
+  },
+  node: {
+    style: {
+      labelText: (datum) => datum.id,
+    },
+  },
+  behaviors: ['zoom-canvas', 'drag-canvas', 'scroll-canvas', 'optimize-canvas'],
+});
+
+graph.render();

packages/site/examples/behavior/canvas/demo/zoom.js

@@ -0,0 +1,22 @@
+import { Graph } from '@antv/g6';
+
+const graph = new Graph({
+  container: 'container',
+  layout: {
+    type: 'grid',
+  },
+  data: {
+    nodes: [{ id: 'node1' }, { id: 'node2' }, { id: 'node3' }, { id: 'node4' }, { id: 'node5' }],
+    edges: [
+      { source: 'node1', target: 'node2' },
+      { source: 'node1', target: 'node3' },
+      { source: 'node1', target: 'node4' },
+      { source: 'node2', target: 'node3' },
+      { source: 'node3', target: 'node4' },
+      { source: 'node4', target: 'node5' },
+    ],
+  },
+  behaviors: ['zoom-canvas'],
+});
+
+graph.render();