ng-zorro-antd
Version:
An enterprise-class UI components based on Ant Design and Angular
148 lines • 18.9 kB
JavaScript
/**
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE
*/
import { ChangeDetectorRef, Directive, ElementRef, EventEmitter, Input, Output } from '@angular/core';
import { Subject } from 'rxjs';
import { select } from 'd3-selection';
import { transition as d3Transition } from 'd3-transition';
import { zoom, zoomIdentity, zoomTransform } from 'd3-zoom';
import { calculateTransform } from './core/utils';
Selection.bind('transition', d3Transition);
export class NzGraphZoomDirective {
constructor(element, cdr) {
this.element = element;
this.cdr = cdr;
this.nzMinZoom = 0.1;
this.nzMaxZoom = 10;
this.nzTransformEvent = new EventEmitter();
this.nzZoomChange = new EventEmitter();
this.destroy$ = new Subject();
}
ngAfterViewInit() {
this.bind();
}
ngOnDestroy() {
this.unbind();
this.destroy$.next();
this.destroy$.complete();
}
bind() {
this.svgElement = this.element.nativeElement.querySelector('svg');
this.gZoomElement = this.element.nativeElement.querySelector('svg > g');
const { width, height } = this.element.nativeElement.getBoundingClientRect();
this.svgSelection = select(this.svgElement);
this.zoomBehavior = zoom()
.extent([
[0, 0],
[width, height]
])
.scaleExtent([this.nzMinZoom, this.nzMaxZoom])
.on('zoom', e => {
this.zoomed(e);
});
this.svgSelection.call(this.zoomBehavior, zoomIdentity.translate(0, 0).scale(this.nzZoom || 1));
// Init with nzZoom
this.reScale(0, this.nzZoom);
}
unbind() {
var _a;
// Destroy listener
(_a = this.svgSelection) === null || _a === void 0 ? void 0 : _a.interrupt().selectAll('*').interrupt();
if (this.zoomBehavior) {
this.zoomBehavior.on('end', null).on('zoom', null);
}
}
// Methods
fitCenter(duration = 0) {
this.reScale(duration);
}
focus(id, duration = 0) {
// Make sure this node is under SVG container
if (!this.svgElement.getElementById(`${id}`)) {
return;
}
const node = this.svgElement.getElementById(`${id}`);
const svgRect = this.svgElement.getBoundingClientRect();
const position = this.getRelativePositionInfo(node);
const svgTransform = zoomTransform(this.svgElement);
const centerX = (position.topLeft.x + position.bottomRight.x) / 2;
const centerY = (position.topLeft.y + position.bottomRight.y) / 2;
const dx = svgRect.left + svgRect.width / 2 - centerX;
const dy = svgRect.top + svgRect.height / 2 - centerY;
this.svgSelection
.transition()
.duration(duration)
.call(this.zoomBehavior.translateBy, dx / svgTransform.k, dy / svgTransform.k);
}
/**
* Handle zoom event
*
* @param transform
*/
zoomed({ transform }) {
const { x, y, k } = transform;
// Update g element transform
this.gZoomElement.setAttribute('transform', `translate(${x}, ${y})scale(${k})`);
this.nzZoom = k;
this.nzZoomChange.emit(this.nzZoom);
this.nzTransformEvent.emit(transform);
this.cdr.markForCheck();
}
/**
* Scale with zoom and duration
*
* @param duration
* @param scale
* @private
*/
reScale(duration, scale) {
const transform = calculateTransform(this.svgElement, this.gZoomElement, scale);
if (!transform) {
return;
}
const { x, y, k } = transform;
const zTransform = zoomIdentity.translate(x, y).scale(Math.max(k, this.nzMinZoom));
this.svgSelection
.transition()
.duration(duration)
.call(this.zoomBehavior.transform, zTransform)
.on('end.fitted', () => {
this.zoomBehavior.on('end.fitted', null);
});
}
getRelativePositionInfo(node) {
const nodeBox = node.getBBox();
const nodeCtm = node.getScreenCTM();
let pointTL = this.svgElement.createSVGPoint();
let pointBR = this.svgElement.createSVGPoint();
pointTL.x = nodeBox.x;
pointTL.y = nodeBox.y;
pointBR.x = nodeBox.x + nodeBox.width;
pointBR.y = nodeBox.y + nodeBox.height;
pointTL = pointTL.matrixTransform(nodeCtm);
pointBR = pointBR.matrixTransform(nodeCtm);
return {
topLeft: pointTL,
bottomRight: pointBR
};
}
}
NzGraphZoomDirective.decorators = [
{ type: Directive, args: [{
selector: '[nz-graph-zoom]',
exportAs: 'nzGraphZoom'
},] }
];
NzGraphZoomDirective.ctorParameters = () => [
{ type: ElementRef },
{ type: ChangeDetectorRef }
];
NzGraphZoomDirective.propDecorators = {
nzZoom: [{ type: Input }],
nzMinZoom: [{ type: Input }],
nzMaxZoom: [{ type: Input }],
nzTransformEvent: [{ type: Output }],
nzZoomChange: [{ type: Output }]
};
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* Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/LICENSE\n */\n\nimport {\n  AfterViewInit,\n  ChangeDetectorRef,\n  Directive,\n  ElementRef,\n  EventEmitter,\n  Input,\n  OnDestroy,\n  Output\n} from '@angular/core';\nimport { Subject } from 'rxjs';\n\nimport { select, Selection } from 'd3-selection';\nimport { transition as d3Transition } from 'd3-transition';\nimport { zoom, ZoomBehavior, zoomIdentity, zoomTransform } from 'd3-zoom';\n\nimport { NzSafeAny } from 'ng-zorro-antd/core/types';\n\nimport { calculateTransform } from './core/utils';\nimport { NzZoomTransform, RelativePositionInfo } from './interface';\nSelection.bind('transition', d3Transition);\n\n@Directive({\n  selector: '[nz-graph-zoom]',\n  exportAs: 'nzGraphZoom'\n})\nexport class NzGraphZoomDirective implements OnDestroy, AfterViewInit {\n  @Input() nzZoom?: number;\n  @Input() nzMinZoom = 0.1;\n  @Input() nzMaxZoom = 10;\n\n  @Output() readonly nzTransformEvent: EventEmitter<NzZoomTransform> = new EventEmitter();\n  @Output() readonly nzZoomChange: EventEmitter<number> = new EventEmitter();\n\n  svgSelection!: Selection<NzSafeAny, NzSafeAny, NzSafeAny, NzSafeAny>;\n  zoomBehavior!: ZoomBehavior<NzSafeAny, NzSafeAny>;\n\n  // TODO\n  // Support svg element only now\n  svgElement!: SVGSVGElement;\n  gZoomElement!: SVGGElement;\n\n  private destroy$ = new Subject<void>();\n\n  constructor(private element: ElementRef, private cdr: ChangeDetectorRef) {}\n\n  ngAfterViewInit(): void {\n    this.bind();\n  }\n\n  ngOnDestroy(): void {\n    this.unbind();\n    this.destroy$.next();\n    this.destroy$.complete();\n  }\n\n  bind(): void {\n    this.svgElement = this.element.nativeElement.querySelector('svg') as SVGSVGElement;\n    this.gZoomElement = this.element.nativeElement.querySelector('svg > g') as SVGGElement;\n    const { width, height } = this.element.nativeElement.getBoundingClientRect();\n    this.svgSelection = select(this.svgElement);\n    this.zoomBehavior = zoom()\n      .extent([\n        [0, 0],\n        [width, height]\n      ])\n      .scaleExtent([this.nzMinZoom, this.nzMaxZoom])\n      .on('zoom', e => {\n        this.zoomed(e);\n      });\n    this.svgSelection.call(this.zoomBehavior, zoomIdentity.translate(0, 0).scale(this.nzZoom || 1));\n    // Init with nzZoom\n    this.reScale(0, this.nzZoom);\n  }\n\n  unbind(): void {\n    // Destroy listener\n    this.svgSelection?.interrupt().selectAll('*').interrupt();\n    if (this.zoomBehavior) {\n      this.zoomBehavior.on('end', null).on('zoom', null);\n    }\n  }\n\n  // Methods\n  fitCenter(duration: number = 0): void {\n    this.reScale(duration);\n  }\n\n  focus(id: NzSafeAny, duration: number = 0): void {\n    // Make sure this node is under SVG container\n    if (!this.svgElement.getElementById(`${id}`)) {\n      return;\n    }\n\n    const node = this.svgElement.getElementById(`${id}`) as SVGGElement;\n    const svgRect = this.svgElement.getBoundingClientRect();\n    const position = this.getRelativePositionInfo(node);\n    const svgTransform = zoomTransform(this.svgElement);\n\n    const centerX = (position.topLeft.x + position.bottomRight.x) / 2;\n    const centerY = (position.topLeft.y + position.bottomRight.y) / 2;\n    const dx = svgRect.left + svgRect.width / 2 - centerX;\n    const dy = svgRect.top + svgRect.height / 2 - centerY;\n\n    this.svgSelection\n      .transition()\n      .duration(duration)\n      .call(this.zoomBehavior.translateBy, dx / svgTransform.k, dy / svgTransform.k);\n  }\n\n  /**\n   * Handle zoom event\n   *\n   * @param transform\n   */\n  private zoomed({ transform }: NzSafeAny): void {\n    const { x, y, k } = transform;\n    // Update g element transform\n    (this.gZoomElement as SVGGElement).setAttribute('transform', `translate(${x}, ${y})scale(${k})`);\n    this.nzZoom = k;\n    this.nzZoomChange.emit(this.nzZoom);\n    this.nzTransformEvent.emit(transform);\n    this.cdr.markForCheck();\n  }\n\n  /**\n   * Scale with zoom and duration\n   *\n   * @param duration\n   * @param scale\n   * @private\n   */\n  private reScale(duration: number, scale?: number): void {\n    const transform = calculateTransform(this.svgElement, this.gZoomElement, scale);\n    if (!transform) {\n      return;\n    }\n    const { x, y, k } = transform;\n    const zTransform = zoomIdentity.translate(x, y).scale(Math.max(k, this.nzMinZoom));\n    this.svgSelection\n      .transition()\n      .duration(duration)\n      .call(this.zoomBehavior.transform, zTransform)\n      .on('end.fitted', () => {\n        this.zoomBehavior.on('end.fitted', null);\n      });\n  }\n\n  private getRelativePositionInfo(node: SVGGElement): RelativePositionInfo {\n    const nodeBox = node.getBBox();\n    const nodeCtm = node.getScreenCTM();\n    let pointTL = this.svgElement.createSVGPoint();\n    let pointBR = this.svgElement.createSVGPoint();\n\n    pointTL.x = nodeBox.x;\n    pointTL.y = nodeBox.y;\n    pointBR.x = nodeBox.x + nodeBox.width;\n    pointBR.y = nodeBox.y + nodeBox.height;\n    pointTL = pointTL.matrixTransform(nodeCtm!);\n    pointBR = pointBR.matrixTransform(nodeCtm!);\n    return {\n      topLeft: pointTL,\n      bottomRight: pointBR\n    };\n  }\n}\n"]}