ng-devui
Version:
DevUI components based on Angular
139 lines • 19.2 kB
JavaScript
import { fromEvent, of, Subscription } from 'rxjs';
import { delay, tap, throttleTime } from 'rxjs/operators';
export class TransformableElement {
get element() {
return this._element;
}
set element(ele) {
this._element = ele;
this.setElementListener();
}
constructor(element, { zoom = 1, turn = 0, translateX = 0, translateY = 0 }) {
this._mouseDown = false;
this._originTranslateX = 0;
this._originTranslateY = 0;
this.MIN_SCALE = 0.2;
this.MAX_SCALE = 2.5;
this.element = element;
this.zoom = zoom;
this.turn = turn;
this.translateX = translateX;
this.translateY = translateY;
this.setElementTransform();
}
setElementListener() {
if (typeof window === 'undefined') {
return;
}
if (this.eventSub) {
this.eventSub.unsubscribe();
}
this.eventSub = new Subscription();
this.eventSub.add(fromEvent(this._element, 'mousewheel').subscribe(($event) => this.mouseZoom($event)));
this.eventSub.add(fromEvent(window, 'mousedown').subscribe(($event) => this.mouseDown($event)));
this.eventSub.add(fromEvent(window, 'mousemove').subscribe(($event) => this.mouseMove($event)));
this.eventSub.add(fromEvent(window, 'mouseup').subscribe(($event) => this.mouseUp($event)));
}
removeElementListener() {
if (this.eventSub) {
this.eventSub.unsubscribe();
}
if (this.zoomSub) {
this.zoomSub.unsubscribe();
}
}
mouseZoom($event) {
if (typeof document === 'undefined') {
return;
}
this.zoomSub = of($event)
.pipe(throttleTime(300), tap((event) => {
const value = -event.wheelDelta || event.deltaY || event.detail;
if (value < 0) {
if (this.zoom === this.MAX_SCALE) {
this.element.style.cursor = 'not-allowed';
return;
}
this.element.style.cursor = 'zoom-in';
document.body.style.cursor = 'zoom-in';
this.zoomIn(0.2);
}
else {
if (this.zoom === this.MIN_SCALE) {
this.element.style.cursor = 'not-allowed';
return;
}
this.element.style.cursor = 'zoom-out';
document.body.style.cursor = 'zoom-out';
this.zoomOut(0.2);
}
}), delay(400))
.subscribe(() => {
this.element.style.cursor = 'grab';
document.body.style.cursor = 'default';
});
}
mouseDown($event) {
if ($event.target !== this.element) {
return;
}
this._mouseDown = true;
this._originMouseX = $event.clientX;
this._originMouseY = $event.clientY;
this._originTranslateX = this.translateX;
this._originTranslateY = this.translateY;
}
mouseMove($event) {
if (this._mouseDown && typeof document !== 'undefined') {
$event.stopPropagation();
$event.preventDefault();
this.translateX = this._originTranslateX + ($event.clientX - this._originMouseX);
this.translateY = this._originTranslateY + ($event.clientY - this._originMouseY);
this.setElementTransform();
document.body.style.cursor = 'grabbing';
this.element.style.cursor = 'grabbing';
}
}
mouseUp($event) {
if (typeof document !== 'undefined') {
this._mouseDown = false;
document.body.style.cursor = 'default';
this.element.style.cursor = 'grab';
}
}
zoomOut(step = 0.25) {
this.zoom = Math.max(this.MIN_SCALE, this.zoom - step);
this.setElementTransform();
return this.zoom === this.MIN_SCALE;
}
zoomIn(step = 0.25) {
this.zoom = Math.min(this.MAX_SCALE, this.zoom + step);
this.setElementTransform();
return this.zoom === this.MAX_SCALE;
}
rotate() {
this.turn -= 0.25;
this.setElementTransform();
}
setOriginalScale() {
this.resetTransformProperties();
this.setElementTransform();
}
setBestScale() {
this.resetTransformProperties();
this.setElementTransform();
}
resetTransformProperties() {
this.zoom = 1;
this.translateX = 0;
this.translateY = 1;
}
setElementTransform(targetParam, zoom = this.zoom, translateX = this.translateX, translateY = this.translateY, turn = this.turn) {
let target = targetParam;
if (!target) {
target = this.element;
}
target.style.transform = `translate(${translateX}px, ${translateY}px) scale(${zoom}) rotate(${turn}turn)`;
}
}
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{ fromEvent, of, Subscription } from 'rxjs';\r\nimport { delay, tap, throttleTime } from 'rxjs/operators';\r\n\r\nexport class TransformableElement {\r\n  private _element: HTMLElement;\r\n  private _mouseDown = false;\r\n  private _originMouseX: number;\r\n  private _originMouseY: number;\r\n  private _originTranslateX = 0;\r\n  private _originTranslateY = 0;\r\n\r\n  get element(): HTMLElement {\r\n    return this._element;\r\n  }\r\n\r\n  set element(ele: HTMLElement) {\r\n    this._element = ele;\r\n    this.setElementListener();\r\n  }\r\n\r\n  private zoom: number;\r\n  private turn: number; // turn\r\n  private translateX: number; // px\r\n  private translateY: number; // px\r\n\r\n  private eventSub: Subscription;\r\n  private zoomSub: Subscription;\r\n\r\n  MIN_SCALE = 0.2;\r\n  MAX_SCALE = 2.5;\r\n\r\n  constructor(element: HTMLElement, { zoom = 1, turn = 0, translateX = 0, translateY = 0 }) {\r\n    this.element = element;\r\n    this.zoom = zoom;\r\n    this.turn = turn;\r\n    this.translateX = translateX;\r\n    this.translateY = translateY;\r\n\r\n    this.setElementTransform();\r\n  }\r\n\r\n  setElementListener() {\r\n    if (typeof window === 'undefined') {\r\n      return;\r\n    }\r\n    if (this.eventSub) {\r\n      this.eventSub.unsubscribe();\r\n    }\r\n    this.eventSub = new Subscription();\r\n    this.eventSub.add(fromEvent(this._element, 'mousewheel').subscribe(($event) => this.mouseZoom($event)));\r\n    this.eventSub.add(fromEvent(window, 'mousedown').subscribe(($event) => this.mouseDown($event)));\r\n    this.eventSub.add(fromEvent(window, 'mousemove').subscribe(($event) => this.mouseMove($event)));\r\n    this.eventSub.add(fromEvent(window, 'mouseup').subscribe(($event) => this.mouseUp($event)));\r\n  }\r\n\r\n  removeElementListener() {\r\n    if (this.eventSub) {\r\n      this.eventSub.unsubscribe();\r\n    }\r\n    if (this.zoomSub) {\r\n      this.zoomSub.unsubscribe();\r\n    }\r\n  }\r\n\r\n  mouseZoom($event) {\r\n    if (typeof document === 'undefined') {\r\n      return;\r\n    }\r\n    this.zoomSub = of($event)\r\n      .pipe(\r\n        throttleTime(300),\r\n        tap((event) => {\r\n          const value = -event.wheelDelta || event.deltaY || event.detail;\r\n          if (value < 0) {\r\n            if (this.zoom === this.MAX_SCALE) {\r\n              this.element.style.cursor = 'not-allowed';\r\n              return;\r\n            }\r\n            this.element.style.cursor = 'zoom-in';\r\n            document.body.style.cursor = 'zoom-in';\r\n            this.zoomIn(0.2);\r\n          } else {\r\n            if (this.zoom === this.MIN_SCALE) {\r\n              this.element.style.cursor = 'not-allowed';\r\n              return;\r\n            }\r\n            this.element.style.cursor = 'zoom-out';\r\n            document.body.style.cursor = 'zoom-out';\r\n            this.zoomOut(0.2);\r\n          }\r\n        }),\r\n        delay(400)\r\n      )\r\n      .subscribe(() => {\r\n        this.element.style.cursor = 'grab';\r\n        document.body.style.cursor = 'default';\r\n      });\r\n  }\r\n\r\n  mouseDown($event) {\r\n    if ($event.target !== this.element) {\r\n      return;\r\n    }\r\n\r\n    this._mouseDown = true;\r\n    this._originMouseX = $event.clientX;\r\n    this._originMouseY = $event.clientY;\r\n    this._originTranslateX = this.translateX;\r\n    this._originTranslateY = this.translateY;\r\n  }\r\n\r\n  mouseMove($event) {\r\n    if (this._mouseDown && typeof document !== 'undefined') {\r\n      $event.stopPropagation();\r\n      $event.preventDefault();\r\n      this.translateX = this._originTranslateX + ($event.clientX - this._originMouseX);\r\n      this.translateY = this._originTranslateY + ($event.clientY - this._originMouseY);\r\n      this.setElementTransform();\r\n      document.body.style.cursor = 'grabbing';\r\n      this.element.style.cursor = 'grabbing';\r\n    }\r\n  }\r\n\r\n  mouseUp($event) {\r\n    if (typeof document !== 'undefined') {\r\n      this._mouseDown = false;\r\n      document.body.style.cursor = 'default';\r\n      this.element.style.cursor = 'grab';\r\n    }\r\n  }\r\n\r\n  zoomOut(step = 0.25) {\r\n    this.zoom = Math.max(this.MIN_SCALE, this.zoom - step);\r\n    this.setElementTransform();\r\n    return this.zoom === this.MIN_SCALE;\r\n  }\r\n\r\n  zoomIn(step = 0.25) {\r\n    this.zoom = Math.min(this.MAX_SCALE, this.zoom + step);\r\n    this.setElementTransform();\r\n    return this.zoom === this.MAX_SCALE;\r\n  }\r\n\r\n  rotate() {\r\n    this.turn -= 0.25;\r\n    this.setElementTransform();\r\n  }\r\n\r\n  setOriginalScale() {\r\n    this.resetTransformProperties();\r\n    this.setElementTransform();\r\n  }\r\n\r\n  setBestScale() {\r\n    this.resetTransformProperties();\r\n    this.setElementTransform();\r\n  }\r\n\r\n  resetTransformProperties() {\r\n    this.zoom = 1;\r\n    this.translateX = 0;\r\n    this.translateY = 1;\r\n  }\r\n\r\n  setElementTransform(targetParam?, zoom = this.zoom, translateX = this.translateX, translateY = this.translateY, turn = this.turn) {\r\n    let target = targetParam;\r\n    if (!target) {\r\n      target = this.element;\r\n    }\r\n    target.style.transform = `translate(${translateX}px, ${translateY}px) scale(${zoom}) rotate(${turn}turn)`;\r\n  }\r\n}\r\n"]}