angular-draggable.directive.js 52 KB

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  1. /**
  2. * @fileoverview added by tsickle
  3. * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
  4. */
  5. import { Directive, ElementRef, Renderer2, Input, Output, HostListener, EventEmitter } from '@angular/core';
  6. import { fromEvent } from 'rxjs';
  7. import { Position } from './models/position';
  8. import { HelperBlock } from './widgets/helper-block';
  9. export class AngularDraggableDirective {
  10. /**
  11. * @param {?} el
  12. * @param {?} renderer
  13. */
  14. constructor(el, renderer) {
  15. this.el = el;
  16. this.renderer = renderer;
  17. this.allowDrag = true;
  18. this.moving = false;
  19. this.orignal = null;
  20. this.oldTrans = new Position(0, 0);
  21. this.tempTrans = new Position(0, 0);
  22. this.currTrans = new Position(0, 0);
  23. this.oldZIndex = '';
  24. this._zIndex = '';
  25. this.needTransform = false;
  26. this.draggingSub = null;
  27. /**
  28. * Bugfix: iFrames, and context unrelated elements block all events, and are unusable
  29. * https://github.com/xieziyu/angular2-draggable/issues/84
  30. */
  31. this._helperBlock = null;
  32. this.started = new EventEmitter();
  33. this.stopped = new EventEmitter();
  34. this.edge = new EventEmitter();
  35. /**
  36. * List of allowed out of bounds edges *
  37. */
  38. this.outOfBounds = {
  39. top: false,
  40. right: false,
  41. bottom: false,
  42. left: false
  43. };
  44. /**
  45. * Round the position to nearest grid
  46. */
  47. this.gridSize = 1;
  48. /**
  49. * Whether to limit the element stay in the bounds
  50. */
  51. this.inBounds = false;
  52. /**
  53. * Whether the element should use it's previous drag position on a new drag event.
  54. */
  55. this.trackPosition = true;
  56. /**
  57. * Input css scale transform of element so translations are correct
  58. */
  59. this.scale = 1;
  60. /**
  61. * Whether to prevent default event
  62. */
  63. this.preventDefaultEvent = false;
  64. /**
  65. * Set initial position by offsets
  66. */
  67. this.position = { x: 0, y: 0 };
  68. /**
  69. * Lock axis: 'x' or 'y'
  70. */
  71. this.lockAxis = null;
  72. /**
  73. * Emit position offsets when moving
  74. */
  75. this.movingOffset = new EventEmitter();
  76. /**
  77. * Emit position offsets when put back
  78. */
  79. this.endOffset = new EventEmitter();
  80. this._helperBlock = new HelperBlock(el.nativeElement, renderer);
  81. }
  82. /**
  83. * Set z-index when not dragging
  84. * @param {?} setting
  85. * @return {?}
  86. */
  87. set zIndex(setting) {
  88. this.renderer.setStyle(this.el.nativeElement, 'z-index', setting);
  89. this._zIndex = setting;
  90. }
  91. /**
  92. * @param {?} setting
  93. * @return {?}
  94. */
  95. set ngDraggable(setting) {
  96. if (setting !== undefined && setting !== null && setting !== '') {
  97. this.allowDrag = !!setting;
  98. /** @type {?} */
  99. let element = this.getDragEl();
  100. if (this.allowDrag) {
  101. this.renderer.addClass(element, 'ng-draggable');
  102. }
  103. else {
  104. this.putBack();
  105. this.renderer.removeClass(element, 'ng-draggable');
  106. }
  107. }
  108. }
  109. /**
  110. * @return {?}
  111. */
  112. ngOnInit() {
  113. if (this.allowDrag) {
  114. /** @type {?} */
  115. let element = this.getDragEl();
  116. this.renderer.addClass(element, 'ng-draggable');
  117. }
  118. this.resetPosition();
  119. }
  120. /**
  121. * @return {?}
  122. */
  123. ngOnDestroy() {
  124. this.bounds = null;
  125. this.handle = null;
  126. this.orignal = null;
  127. this.oldTrans = null;
  128. this.tempTrans = null;
  129. this.currTrans = null;
  130. this._helperBlock.dispose();
  131. this._helperBlock = null;
  132. if (this.draggingSub) {
  133. this.draggingSub.unsubscribe();
  134. }
  135. }
  136. /**
  137. * @param {?} changes
  138. * @return {?}
  139. */
  140. ngOnChanges(changes) {
  141. if (changes['position'] && !changes['position'].isFirstChange()) {
  142. /** @type {?} */
  143. let p = changes['position'].currentValue;
  144. if (!this.moving) {
  145. if (Position.isIPosition(p)) {
  146. this.oldTrans.set(p);
  147. }
  148. else {
  149. this.oldTrans.reset();
  150. }
  151. this.transform();
  152. }
  153. else {
  154. this.needTransform = true;
  155. }
  156. }
  157. }
  158. /**
  159. * @return {?}
  160. */
  161. ngAfterViewInit() {
  162. if (this.inBounds) {
  163. this.boundsCheck();
  164. this.oldTrans.add(this.tempTrans);
  165. this.tempTrans.reset();
  166. }
  167. }
  168. /**
  169. * @private
  170. * @return {?}
  171. */
  172. getDragEl() {
  173. return this.handle ? this.handle : this.el.nativeElement;
  174. }
  175. /**
  176. * @return {?}
  177. */
  178. resetPosition() {
  179. if (Position.isIPosition(this.position)) {
  180. this.oldTrans.set(this.position);
  181. }
  182. else {
  183. this.oldTrans.reset();
  184. }
  185. this.tempTrans.reset();
  186. this.transform();
  187. }
  188. /**
  189. * @private
  190. * @param {?} p
  191. * @return {?}
  192. */
  193. moveTo(p) {
  194. if (this.orignal) {
  195. p.subtract(this.orignal);
  196. this.tempTrans.set(p);
  197. this.tempTrans.divide(this.scale);
  198. this.transform();
  199. if (this.bounds) {
  200. this.edge.emit(this.boundsCheck());
  201. }
  202. this.movingOffset.emit(this.currTrans.value);
  203. }
  204. }
  205. /**
  206. * @private
  207. * @return {?}
  208. */
  209. transform() {
  210. /** @type {?} */
  211. let translateX = this.tempTrans.x + this.oldTrans.x;
  212. /** @type {?} */
  213. let translateY = this.tempTrans.y + this.oldTrans.y;
  214. if (this.lockAxis === 'x') {
  215. translateX = this.oldTrans.x;
  216. this.tempTrans.x = 0;
  217. }
  218. else if (this.lockAxis === 'y') {
  219. translateY = this.oldTrans.y;
  220. this.tempTrans.y = 0;
  221. }
  222. // Snap to grid: by grid size
  223. if (this.gridSize > 1) {
  224. translateX = Math.round(translateX / this.gridSize) * this.gridSize;
  225. translateY = Math.round(translateY / this.gridSize) * this.gridSize;
  226. }
  227. /** @type {?} */
  228. let value = `translate(${Math.round(translateX)}px, ${Math.round(translateY)}px)`;
  229. this.renderer.setStyle(this.el.nativeElement, 'transform', value);
  230. this.renderer.setStyle(this.el.nativeElement, '-webkit-transform', value);
  231. this.renderer.setStyle(this.el.nativeElement, '-ms-transform', value);
  232. this.renderer.setStyle(this.el.nativeElement, '-moz-transform', value);
  233. this.renderer.setStyle(this.el.nativeElement, '-o-transform', value);
  234. // save current position
  235. this.currTrans.x = translateX;
  236. this.currTrans.y = translateY;
  237. }
  238. /**
  239. * @private
  240. * @return {?}
  241. */
  242. pickUp() {
  243. // get old z-index:
  244. this.oldZIndex = this.el.nativeElement.style.zIndex ? this.el.nativeElement.style.zIndex : '';
  245. if (window) {
  246. this.oldZIndex = window.getComputedStyle(this.el.nativeElement, null).getPropertyValue('z-index');
  247. }
  248. if (this.zIndexMoving) {
  249. this.renderer.setStyle(this.el.nativeElement, 'z-index', this.zIndexMoving);
  250. }
  251. if (!this.moving) {
  252. this.started.emit(this.el.nativeElement);
  253. this.moving = true;
  254. /** @type {?} */
  255. const element = this.getDragEl();
  256. this.renderer.addClass(element, 'ng-dragging');
  257. /**
  258. * Fix performance issue:
  259. * https://github.com/xieziyu/angular2-draggable/issues/112
  260. */
  261. this.subscribeEvents();
  262. }
  263. }
  264. /**
  265. * @private
  266. * @return {?}
  267. */
  268. subscribeEvents() {
  269. this.draggingSub = fromEvent(document, 'mousemove', { passive: false }).subscribe(event => this.onMouseMove((/** @type {?} */ (event))));
  270. this.draggingSub.add(fromEvent(document, 'touchmove', { passive: false }).subscribe(event => this.onMouseMove((/** @type {?} */ (event)))));
  271. this.draggingSub.add(fromEvent(document, 'mouseup', { passive: false }).subscribe(() => this.putBack()));
  272. // checking if browser is IE or Edge - https://github.com/xieziyu/angular2-draggable/issues/153
  273. /** @type {?} */
  274. let isIEOrEdge = /msie\s|trident\//i.test(window.navigator.userAgent);
  275. if (!isIEOrEdge) {
  276. this.draggingSub.add(fromEvent(document, 'mouseleave', { passive: false }).subscribe(() => this.putBack()));
  277. }
  278. this.draggingSub.add(fromEvent(document, 'touchend', { passive: false }).subscribe(() => this.putBack()));
  279. this.draggingSub.add(fromEvent(document, 'touchcancel', { passive: false }).subscribe(() => this.putBack()));
  280. }
  281. /**
  282. * @private
  283. * @return {?}
  284. */
  285. unsubscribeEvents() {
  286. this.draggingSub.unsubscribe();
  287. this.draggingSub = null;
  288. }
  289. /**
  290. * @return {?}
  291. */
  292. boundsCheck() {
  293. if (this.bounds) {
  294. /** @type {?} */
  295. let boundary = this.bounds.getBoundingClientRect();
  296. /** @type {?} */
  297. let elem = this.el.nativeElement.getBoundingClientRect();
  298. /** @type {?} */
  299. let result = {
  300. 'top': this.outOfBounds.top ? true : boundary.top < elem.top,
  301. 'right': this.outOfBounds.right ? true : boundary.right > elem.right,
  302. 'bottom': this.outOfBounds.bottom ? true : boundary.bottom > elem.bottom,
  303. 'left': this.outOfBounds.left ? true : boundary.left < elem.left
  304. };
  305. if (this.inBounds) {
  306. if (!result.top) {
  307. this.tempTrans.y -= (elem.top - boundary.top) / this.scale;
  308. }
  309. if (!result.bottom) {
  310. this.tempTrans.y -= (elem.bottom - boundary.bottom) / this.scale;
  311. }
  312. if (!result.right) {
  313. this.tempTrans.x -= (elem.right - boundary.right) / this.scale;
  314. }
  315. if (!result.left) {
  316. this.tempTrans.x -= (elem.left - boundary.left) / this.scale;
  317. }
  318. this.transform();
  319. }
  320. return result;
  321. }
  322. }
  323. /**
  324. * Get current offset
  325. * @return {?}
  326. */
  327. getCurrentOffset() {
  328. return this.currTrans.value;
  329. }
  330. /**
  331. * @private
  332. * @return {?}
  333. */
  334. putBack() {
  335. if (this._zIndex) {
  336. this.renderer.setStyle(this.el.nativeElement, 'z-index', this._zIndex);
  337. }
  338. else if (this.zIndexMoving) {
  339. if (this.oldZIndex) {
  340. this.renderer.setStyle(this.el.nativeElement, 'z-index', this.oldZIndex);
  341. }
  342. else {
  343. this.el.nativeElement.style.removeProperty('z-index');
  344. }
  345. }
  346. if (this.moving) {
  347. this.stopped.emit(this.el.nativeElement);
  348. // Remove the helper div:
  349. this._helperBlock.remove();
  350. if (this.needTransform) {
  351. if (Position.isIPosition(this.position)) {
  352. this.oldTrans.set(this.position);
  353. }
  354. else {
  355. this.oldTrans.reset();
  356. }
  357. this.transform();
  358. this.needTransform = false;
  359. }
  360. if (this.bounds) {
  361. this.edge.emit(this.boundsCheck());
  362. }
  363. this.moving = false;
  364. this.endOffset.emit(this.currTrans.value);
  365. if (this.trackPosition) {
  366. this.oldTrans.add(this.tempTrans);
  367. }
  368. this.tempTrans.reset();
  369. if (!this.trackPosition) {
  370. this.transform();
  371. }
  372. /** @type {?} */
  373. const element = this.getDragEl();
  374. this.renderer.removeClass(element, 'ng-dragging');
  375. /**
  376. * Fix performance issue:
  377. * https://github.com/xieziyu/angular2-draggable/issues/112
  378. */
  379. this.unsubscribeEvents();
  380. }
  381. }
  382. /**
  383. * @param {?} target
  384. * @param {?} element
  385. * @return {?}
  386. */
  387. checkHandleTarget(target, element) {
  388. // Checks if the target is the element clicked, then checks each child element of element as well
  389. // Ignores button clicks
  390. // Ignore elements of type button
  391. if (element.tagName === 'BUTTON') {
  392. return false;
  393. }
  394. // If the target was found, return true (handle was found)
  395. if (element === target) {
  396. return true;
  397. }
  398. // Recursively iterate this elements children
  399. for (let child in element.children) {
  400. if (element.children.hasOwnProperty(child)) {
  401. if (this.checkHandleTarget(target, element.children[child])) {
  402. return true;
  403. }
  404. }
  405. }
  406. // Handle was not found in this lineage
  407. // Note: return false is ignore unless it is the parent element
  408. return false;
  409. }
  410. /**
  411. * @param {?} event
  412. * @return {?}
  413. */
  414. onMouseDown(event) {
  415. // 1. skip right click;
  416. if (event instanceof MouseEvent && event.button === 2) {
  417. return;
  418. }
  419. // 2. if handle is set, the element can only be moved by handle
  420. /** @type {?} */
  421. let target = event.target || event.srcElement;
  422. if (this.handle !== undefined && !this.checkHandleTarget(target, this.handle)) {
  423. return;
  424. }
  425. // 3. if allow drag is set to false, ignore the mousedown
  426. if (this.allowDrag === false) {
  427. return;
  428. }
  429. if (this.preventDefaultEvent) {
  430. event.stopPropagation();
  431. event.preventDefault();
  432. }
  433. this.orignal = Position.fromEvent(event, this.getDragEl());
  434. this.pickUp();
  435. }
  436. /**
  437. * @param {?} event
  438. * @return {?}
  439. */
  440. onMouseMove(event) {
  441. if (this.moving && this.allowDrag) {
  442. if (this.preventDefaultEvent) {
  443. event.stopPropagation();
  444. event.preventDefault();
  445. }
  446. // Add a transparent helper div:
  447. this._helperBlock.add();
  448. this.moveTo(Position.fromEvent(event, this.getDragEl()));
  449. }
  450. }
  451. }
  452. AngularDraggableDirective.decorators = [
  453. { type: Directive, args: [{
  454. selector: '[ngDraggable]',
  455. exportAs: 'ngDraggable'
  456. },] }
  457. ];
  458. /** @nocollapse */
  459. AngularDraggableDirective.ctorParameters = () => [
  460. { type: ElementRef },
  461. { type: Renderer2 }
  462. ];
  463. AngularDraggableDirective.propDecorators = {
  464. started: [{ type: Output }],
  465. stopped: [{ type: Output }],
  466. edge: [{ type: Output }],
  467. handle: [{ type: Input }],
  468. bounds: [{ type: Input }],
  469. outOfBounds: [{ type: Input }],
  470. gridSize: [{ type: Input }],
  471. zIndexMoving: [{ type: Input }],
  472. zIndex: [{ type: Input }],
  473. inBounds: [{ type: Input }],
  474. trackPosition: [{ type: Input }],
  475. scale: [{ type: Input }],
  476. preventDefaultEvent: [{ type: Input }],
  477. position: [{ type: Input }],
  478. lockAxis: [{ type: Input }],
  479. movingOffset: [{ type: Output }],
  480. endOffset: [{ type: Output }],
  481. ngDraggable: [{ type: Input }],
  482. onMouseDown: [{ type: HostListener, args: ['mousedown', ['$event'],] }, { type: HostListener, args: ['touchstart', ['$event'],] }]
  483. };
  484. if (false) {
  485. /**
  486. * @type {?}
  487. * @private
  488. */
  489. AngularDraggableDirective.prototype.allowDrag;
  490. /**
  491. * @type {?}
  492. * @private
  493. */
  494. AngularDraggableDirective.prototype.moving;
  495. /**
  496. * @type {?}
  497. * @private
  498. */
  499. AngularDraggableDirective.prototype.orignal;
  500. /**
  501. * @type {?}
  502. * @private
  503. */
  504. AngularDraggableDirective.prototype.oldTrans;
  505. /**
  506. * @type {?}
  507. * @private
  508. */
  509. AngularDraggableDirective.prototype.tempTrans;
  510. /**
  511. * @type {?}
  512. * @private
  513. */
  514. AngularDraggableDirective.prototype.currTrans;
  515. /**
  516. * @type {?}
  517. * @private
  518. */
  519. AngularDraggableDirective.prototype.oldZIndex;
  520. /**
  521. * @type {?}
  522. * @private
  523. */
  524. AngularDraggableDirective.prototype._zIndex;
  525. /**
  526. * @type {?}
  527. * @private
  528. */
  529. AngularDraggableDirective.prototype.needTransform;
  530. /**
  531. * @type {?}
  532. * @private
  533. */
  534. AngularDraggableDirective.prototype.draggingSub;
  535. /**
  536. * Bugfix: iFrames, and context unrelated elements block all events, and are unusable
  537. * https://github.com/xieziyu/angular2-draggable/issues/84
  538. * @type {?}
  539. * @private
  540. */
  541. AngularDraggableDirective.prototype._helperBlock;
  542. /** @type {?} */
  543. AngularDraggableDirective.prototype.started;
  544. /** @type {?} */
  545. AngularDraggableDirective.prototype.stopped;
  546. /** @type {?} */
  547. AngularDraggableDirective.prototype.edge;
  548. /**
  549. * Make the handle HTMLElement draggable
  550. * @type {?}
  551. */
  552. AngularDraggableDirective.prototype.handle;
  553. /**
  554. * Set the bounds HTMLElement
  555. * @type {?}
  556. */
  557. AngularDraggableDirective.prototype.bounds;
  558. /**
  559. * List of allowed out of bounds edges *
  560. * @type {?}
  561. */
  562. AngularDraggableDirective.prototype.outOfBounds;
  563. /**
  564. * Round the position to nearest grid
  565. * @type {?}
  566. */
  567. AngularDraggableDirective.prototype.gridSize;
  568. /**
  569. * Set z-index when dragging
  570. * @type {?}
  571. */
  572. AngularDraggableDirective.prototype.zIndexMoving;
  573. /**
  574. * Whether to limit the element stay in the bounds
  575. * @type {?}
  576. */
  577. AngularDraggableDirective.prototype.inBounds;
  578. /**
  579. * Whether the element should use it's previous drag position on a new drag event.
  580. * @type {?}
  581. */
  582. AngularDraggableDirective.prototype.trackPosition;
  583. /**
  584. * Input css scale transform of element so translations are correct
  585. * @type {?}
  586. */
  587. AngularDraggableDirective.prototype.scale;
  588. /**
  589. * Whether to prevent default event
  590. * @type {?}
  591. */
  592. AngularDraggableDirective.prototype.preventDefaultEvent;
  593. /**
  594. * Set initial position by offsets
  595. * @type {?}
  596. */
  597. AngularDraggableDirective.prototype.position;
  598. /**
  599. * Lock axis: 'x' or 'y'
  600. * @type {?}
  601. */
  602. AngularDraggableDirective.prototype.lockAxis;
  603. /**
  604. * Emit position offsets when moving
  605. * @type {?}
  606. */
  607. AngularDraggableDirective.prototype.movingOffset;
  608. /**
  609. * Emit position offsets when put back
  610. * @type {?}
  611. */
  612. AngularDraggableDirective.prototype.endOffset;
  613. /**
  614. * @type {?}
  615. * @private
  616. */
  617. AngularDraggableDirective.prototype.el;
  618. /**
  619. * @type {?}
  620. * @private
  621. */
  622. AngularDraggableDirective.prototype.renderer;
  623. }
  624. //# 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{\n  Directive, ElementRef, Renderer2,\n  Input, Output, OnInit, HostListener,\n  EventEmitter, OnChanges, SimpleChanges, OnDestroy, AfterViewInit\n} from '@angular/core';\n\nimport { Subscription, fromEvent } from 'rxjs';\nimport { IPosition, Position } from './models/position';\nimport { HelperBlock } from './widgets/helper-block';\n\n@Directive({\n  selector: '[ngDraggable]',\n  exportAs: 'ngDraggable'\n})\nexport class AngularDraggableDirective implements OnInit, OnDestroy, OnChanges, AfterViewInit {\n  private allowDrag = true;\n  private moving = false;\n  private orignal: Position = null;\n  private oldTrans = new Position(0, 0);\n  private tempTrans = new Position(0, 0);\n  private currTrans = new Position(0, 0);\n  private oldZIndex = '';\n  private _zIndex = '';\n  private needTransform = false;\n\n  private draggingSub: Subscription = null;\n\n  /**\n   * Bugfix: iFrames, and context unrelated elements block all events, and are unusable\n   * https://github.com/xieziyu/angular2-draggable/issues/84\n   */\n  private _helperBlock: HelperBlock = null;\n\n  @Output() started = new EventEmitter<any>();\n  @Output() stopped = new EventEmitter<any>();\n  @Output() edge = new EventEmitter<any>();\n\n  /** Make the handle HTMLElement draggable */\n  @Input() handle: HTMLElement;\n\n  /** Set the bounds HTMLElement */\n  @Input() bounds: HTMLElement;\n\n  /** List of allowed out of bounds edges **/\n  @Input() outOfBounds = {\n    top: false,\n    right: false,\n    bottom: false,\n    left: false\n  };\n\n  /** Round the position to nearest grid */\n  @Input() gridSize = 1;\n\n  /** Set z-index when dragging */\n  @Input() zIndexMoving: string;\n\n  /** Set z-index when not dragging */\n  @Input() set zIndex(setting: string) {\n    this.renderer.setStyle(this.el.nativeElement, 'z-index', setting);\n    this._zIndex = setting;\n  }\n  /** Whether to limit the element stay in the bounds */\n  @Input() inBounds = false;\n\n  /** Whether the element should use it's previous drag position on a new drag event. */\n  @Input() trackPosition = true;\n\n  /** Input css scale transform of element so translations are correct */\n  @Input() scale = 1;\n\n  /** Whether to prevent default event */\n  @Input() preventDefaultEvent = false;\n\n  /** Set initial position by offsets */\n  @Input() position: IPosition = { x: 0, y: 0 };\n\n  /** Lock axis: 'x' or 'y' */\n  @Input() lockAxis: string = null;\n\n  /** Emit position offsets when moving */\n  @Output() movingOffset = new EventEmitter<IPosition>();\n\n  /** Emit position offsets when put back */\n  @Output() endOffset = new EventEmitter<IPosition>();\n\n  @Input()\n  set ngDraggable(setting: any) {\n    if (setting !== undefined && setting !== null && setting !== '') {\n      this.allowDrag = !!setting;\n\n      let element = this.getDragEl();\n\n      if (this.allowDrag) {\n        this.renderer.addClass(element, 'ng-draggable');\n      } else {\n        this.putBack();\n        this.renderer.removeClass(element, 'ng-draggable');\n      }\n    }\n  }\n\n  constructor(private el: ElementRef, private renderer: Renderer2) {\n    this._helperBlock = new HelperBlock(el.nativeElement, renderer);\n  }\n\n  ngOnInit() {\n    if (this.allowDrag) {\n      let element = this.getDragEl();\n      this.renderer.addClass(element, 'ng-draggable');\n    }\n    this.resetPosition();\n  }\n\n  ngOnDestroy() {\n    this.bounds = null;\n    this.handle = null;\n    this.orignal = null;\n    this.oldTrans = null;\n    this.tempTrans = null;\n    this.currTrans = null;\n    this._helperBlock.dispose();\n    this._helperBlock = null;\n\n    if (this.draggingSub) {\n      this.draggingSub.unsubscribe();\n    }\n  }\n\n  ngOnChanges(changes: SimpleChanges) {\n    if (changes['position'] && !changes['position'].isFirstChange()) {\n      let p = changes['position'].currentValue;\n\n      if (!this.moving) {\n        if (Position.isIPosition(p)) {\n          this.oldTrans.set(p);\n        } else {\n          this.oldTrans.reset();\n        }\n\n        this.transform();\n      } else {\n        this.needTransform = true;\n      }\n    }\n  }\n\n  ngAfterViewInit() {\n    if (this.inBounds) {\n      this.boundsCheck();\n      this.oldTrans.add(this.tempTrans);\n      this.tempTrans.reset();\n    }\n  }\n\n  private getDragEl() {\n    return this.handle ? this.handle : this.el.nativeElement;\n  }\n\n  resetPosition() {\n    if (Position.isIPosition(this.position)) {\n      this.oldTrans.set(this.position);\n    } else {\n      this.oldTrans.reset();\n    }\n    this.tempTrans.reset();\n    this.transform();\n  }\n\n  private moveTo(p: Position) {\n    if (this.orignal) {\n      p.subtract(this.orignal);\n      this.tempTrans.set(p);\n      this.tempTrans.divide(this.scale);\n      this.transform();\n\n      if (this.bounds) {\n        this.edge.emit(this.boundsCheck());\n      }\n\n      this.movingOffset.emit(this.currTrans.value);\n    }\n  }\n\n  private transform() {\n    let translateX = this.tempTrans.x + this.oldTrans.x;\n    let translateY = this.tempTrans.y + this.oldTrans.y;\n\n    if (this.lockAxis === 'x') {\n      translateX = this.oldTrans.x;\n      this.tempTrans.x = 0;\n    } else if (this.lockAxis === 'y') {\n      translateY = this.oldTrans.y;\n      this.tempTrans.y = 0;\n    }\n\n    // Snap to grid: by grid size\n    if (this.gridSize > 1) {\n      translateX = Math.round(translateX / this.gridSize) * this.gridSize;\n      translateY = Math.round(translateY / this.gridSize) * this.gridSize;\n    }\n\n    let value = `translate(${ Math.round(translateX) }px, ${ Math.round(translateY) }px)`;\n\n    this.renderer.setStyle(this.el.nativeElement, 'transform', value);\n    this.renderer.setStyle(this.el.nativeElement, '-webkit-transform', value);\n    this.renderer.setStyle(this.el.nativeElement, '-ms-transform', value);\n    this.renderer.setStyle(this.el.nativeElement, '-moz-transform', value);\n    this.renderer.setStyle(this.el.nativeElement, '-o-transform', value);\n\n    // save current position\n    this.currTrans.x = translateX;\n    this.currTrans.y = translateY;\n  }\n\n  private pickUp() {\n    // get old z-index:\n    this.oldZIndex = this.el.nativeElement.style.zIndex ? this.el.nativeElement.style.zIndex : '';\n\n    if (window) {\n      this.oldZIndex = window.getComputedStyle(this.el.nativeElement, null).getPropertyValue('z-index');\n    }\n\n    if (this.zIndexMoving) {\n      this.renderer.setStyle(this.el.nativeElement, 'z-index', this.zIndexMoving);\n    }\n\n    if (!this.moving) {\n      this.started.emit(this.el.nativeElement);\n      this.moving = true;\n\n      const element = this.getDragEl();\n      this.renderer.addClass(element, 'ng-dragging');\n\n      /**\n       * Fix performance issue:\n       * https://github.com/xieziyu/angular2-draggable/issues/112\n       */\n      this.subscribeEvents();\n    }\n  }\n\n  private subscribeEvents() {\n    this.draggingSub = fromEvent(document, 'mousemove', { passive: false }).subscribe(event => this.onMouseMove(event as MouseEvent));\n    this.draggingSub.add(fromEvent(document, 'touchmove', { passive: false }).subscribe(event => this.onMouseMove(event as TouchEvent)));\n    this.draggingSub.add(fromEvent(document, 'mouseup', { passive: false }).subscribe(() => this.putBack()));\n    // checking if browser is IE or Edge - https://github.com/xieziyu/angular2-draggable/issues/153\n    let isIEOrEdge = /msie\\s|trident\\//i.test(window.navigator.userAgent);\n    if (!isIEOrEdge) {\n      this.draggingSub.add(fromEvent(document, 'mouseleave', {passive: false}).subscribe(() => this.putBack()));\n    }\n    this.draggingSub.add(fromEvent(document, 'touchend', { passive: false }).subscribe(() => this.putBack()));\n    this.draggingSub.add(fromEvent(document, 'touchcancel', { passive: false }).subscribe(() => this.putBack()));\n  }\n\n  private unsubscribeEvents() {\n    this.draggingSub.unsubscribe();\n    this.draggingSub = null;\n  }\n\n  boundsCheck() {\n    if (this.bounds) {\n      let boundary = this.bounds.getBoundingClientRect();\n      let elem = this.el.nativeElement.getBoundingClientRect();\n      let result = {\n        'top': this.outOfBounds.top ? true : boundary.top < elem.top,\n        'right': this.outOfBounds.right ? true : boundary.right > elem.right,\n        'bottom': this.outOfBounds.bottom ? true : boundary.bottom > elem.bottom,\n        'left': this.outOfBounds.left ? true : boundary.left < elem.left\n      };\n\n      if (this.inBounds) {\n        if (!result.top) {\n          this.tempTrans.y -= (elem.top - boundary.top) / this.scale;\n        }\n\n        if (!result.bottom) {\n          this.tempTrans.y -= (elem.bottom - boundary.bottom) / this.scale;\n        }\n\n        if (!result.right) {\n          this.tempTrans.x -= (elem.right - boundary.right) / this.scale;\n        }\n\n        if (!result.left) {\n          this.tempTrans.x -= (elem.left - boundary.left) / this.scale;\n        }\n\n        this.transform();\n      }\n\n      return result;\n    }\n  }\n\n  /** Get current offset */\n  getCurrentOffset() {\n    return this.currTrans.value;\n  }\n\n  private putBack() {\n    if (this._zIndex) {\n      this.renderer.setStyle(this.el.nativeElement, 'z-index', this._zIndex);\n    } else if (this.zIndexMoving) {\n      if (this.oldZIndex) {\n        this.renderer.setStyle(this.el.nativeElement, 'z-index', this.oldZIndex);\n      } else {\n        this.el.nativeElement.style.removeProperty('z-index');\n      }\n    }\n\n    if (this.moving) {\n      this.stopped.emit(this.el.nativeElement);\n\n      // Remove the helper div:\n      this._helperBlock.remove();\n\n      if (this.needTransform) {\n        if (Position.isIPosition(this.position)) {\n          this.oldTrans.set(this.position);\n        } else {\n          this.oldTrans.reset();\n        }\n\n        this.transform();\n        this.needTransform = false;\n      }\n\n      if (this.bounds) {\n        this.edge.emit(this.boundsCheck());\n      }\n\n      this.moving = false;\n      this.endOffset.emit(this.currTrans.value);\n\n      if (this.trackPosition) {\n        this.oldTrans.add(this.tempTrans);\n      }\n\n      this.tempTrans.reset();\n\n      if (!this.trackPosition) {\n        this.transform();\n      }\n\n      const element = this.getDragEl();\n      this.renderer.removeClass(element, 'ng-dragging');\n\n      /**\n       * Fix performance issue:\n       * https://github.com/xieziyu/angular2-draggable/issues/112\n       */\n      this.unsubscribeEvents();\n    }\n  }\n\n  checkHandleTarget(target: EventTarget, element: Element) {\n    // Checks if the target is the element clicked, then checks each child element of element as well\n    // Ignores button clicks\n\n    // Ignore elements of type button\n    if (element.tagName === 'BUTTON') {\n      return false;\n    }\n\n    // If the target was found, return true (handle was found)\n    if (element === target) {\n      return true;\n    }\n\n    // Recursively iterate this elements children\n    for (let child in element.children) {\n      if (element.children.hasOwnProperty(child)) {\n        if (this.checkHandleTarget(target, element.children[child])) {\n          return true;\n        }\n      }\n    }\n\n    // Handle was not found in this lineage\n    // Note: return false is ignore unless it is the parent element\n    return false;\n  }\n\n  @HostListener('mousedown', ['$event'])\n  @HostListener('touchstart', ['$event'])\n  onMouseDown(event: MouseEvent | TouchEvent) {\n    // 1. skip right click;\n    if (event instanceof MouseEvent && event.button === 2) {\n      return;\n    }\n    // 2. if handle is set, the element can only be moved by handle\n    let target = event.target || event.srcElement;\n    if (this.handle !== undefined && !this.checkHandleTarget(target, this.handle)) {\n      return;\n    }\n\n    // 3. if allow drag is set to false, ignore the mousedown\n    if (this.allowDrag === false) {\n      return;\n    }\n\n    if (this.preventDefaultEvent) {\n      event.stopPropagation();\n      event.preventDefault();\n    }\n\n    this.orignal = Position.fromEvent(event, this.getDragEl());\n    this.pickUp();\n  }\n\n  onMouseMove(event: MouseEvent | TouchEvent) {\n    if (this.moving && this.allowDrag) {\n      if (this.preventDefaultEvent) {\n        event.stopPropagation();\n        event.preventDefault();\n      }\n\n      // Add a transparent helper div:\n      this._helperBlock.add();\n      this.moveTo(Position.fromEvent(event, this.getDragEl()));\n    }\n  }\n}\n"]}