vis.js is a dynamic, browser-based visualization library
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  1. var Hammer = require('../../module/hammer');
  2. var util = require('../../util');
  3. var DataSet = require('../../DataSet');
  4. var DataView = require('../../DataView');
  5. var Component = require('./Component');
  6. var Group = require('./Group');
  7. var BackgroundGroup = require('./BackgroundGroup');
  8. var BoxItem = require('./item/BoxItem');
  9. var PointItem = require('./item/PointItem');
  10. var RangeItem = require('./item/RangeItem');
  11. var BackgroundItem = require('./item/BackgroundItem');
  12. var UNGROUPED = '__ungrouped__'; // reserved group id for ungrouped items
  13. var BACKGROUND = '__background__'; // reserved group id for background items without group
  14. /**
  15. * An ItemSet holds a set of items and ranges which can be displayed in a
  16. * range. The width is determined by the parent of the ItemSet, and the height
  17. * is determined by the size of the items.
  18. * @param {{dom: Object, domProps: Object, emitter: Emitter, range: Range}} body
  19. * @param {Object} [options] See ItemSet.setOptions for the available options.
  20. * @constructor ItemSet
  21. * @extends Component
  22. */
  23. function ItemSet(body, options) {
  24. this.body = body;
  25. this.defaultOptions = {
  26. type: null, // 'box', 'point', 'range', 'background'
  27. orientation: 'bottom', // 'top' or 'bottom'
  28. align: 'auto', // alignment of box items
  29. stack: true,
  30. groupOrder: null,
  31. selectable: true,
  32. editable: {
  33. updateTime: false,
  34. updateGroup: false,
  35. add: false,
  36. remove: false
  37. },
  38. onAdd: function (item, callback) {
  39. callback(item);
  40. },
  41. onUpdate: function (item, callback) {
  42. callback(item);
  43. },
  44. onMove: function (item, callback) {
  45. callback(item);
  46. },
  47. onRemove: function (item, callback) {
  48. callback(item);
  49. },
  50. onMoving: function (item, callback) {
  51. callback(item);
  52. },
  53. margin: {
  54. item: {
  55. horizontal: 10,
  56. vertical: 10
  57. },
  58. axis: 20
  59. },
  60. padding: 5
  61. };
  62. // options is shared by this ItemSet and all its items
  63. this.options = util.extend({}, this.defaultOptions);
  64. // options for getting items from the DataSet with the correct type
  65. this.itemOptions = {
  66. type: {start: 'Date', end: 'Date'}
  67. };
  68. this.conversion = {
  69. toScreen: body.util.toScreen,
  70. toTime: body.util.toTime
  71. };
  72. this.dom = {};
  73. this.props = {};
  74. this.hammer = null;
  75. var me = this;
  76. this.itemsData = null; // DataSet
  77. this.groupsData = null; // DataSet
  78. // listeners for the DataSet of the items
  79. this.itemListeners = {
  80. 'add': function (event, params, senderId) {
  81. me._onAdd(params.items);
  82. },
  83. 'update': function (event, params, senderId) {
  84. me._onUpdate(params.items);
  85. },
  86. 'remove': function (event, params, senderId) {
  87. me._onRemove(params.items);
  88. }
  89. };
  90. // listeners for the DataSet of the groups
  91. this.groupListeners = {
  92. 'add': function (event, params, senderId) {
  93. me._onAddGroups(params.items);
  94. },
  95. 'update': function (event, params, senderId) {
  96. me._onUpdateGroups(params.items);
  97. },
  98. 'remove': function (event, params, senderId) {
  99. me._onRemoveGroups(params.items);
  100. }
  101. };
  102. this.items = {}; // object with an Item for every data item
  103. this.groups = {}; // Group object for every group
  104. this.groupIds = [];
  105. this.selection = []; // list with the ids of all selected nodes
  106. this.stackDirty = true; // if true, all items will be restacked on next redraw
  107. this.touchParams = {}; // stores properties while dragging
  108. // create the HTML DOM
  109. this._create();
  110. this.setOptions(options);
  111. }
  112. ItemSet.prototype = new Component();
  113. // available item types will be registered here
  114. ItemSet.types = {
  115. background: BackgroundItem,
  116. box: BoxItem,
  117. range: RangeItem,
  118. point: PointItem
  119. };
  120. /**
  121. * Create the HTML DOM for the ItemSet
  122. */
  123. ItemSet.prototype._create = function(){
  124. var frame = document.createElement('div');
  125. frame.className = 'itemset';
  126. frame['timeline-itemset'] = this;
  127. this.dom.frame = frame;
  128. // create background panel
  129. var background = document.createElement('div');
  130. background.className = 'background';
  131. frame.appendChild(background);
  132. this.dom.background = background;
  133. // create foreground panel
  134. var foreground = document.createElement('div');
  135. foreground.className = 'foreground';
  136. frame.appendChild(foreground);
  137. this.dom.foreground = foreground;
  138. // create axis panel
  139. var axis = document.createElement('div');
  140. axis.className = 'axis';
  141. this.dom.axis = axis;
  142. // create labelset
  143. var labelSet = document.createElement('div');
  144. labelSet.className = 'labelset';
  145. this.dom.labelSet = labelSet;
  146. // create ungrouped Group
  147. this._updateUngrouped();
  148. // create background Group
  149. var backgroundGroup = new BackgroundGroup(BACKGROUND, null, this);
  150. backgroundGroup.show();
  151. this.groups[BACKGROUND] = backgroundGroup;
  152. // attach event listeners
  153. // Note: we bind to the centerContainer for the case where the height
  154. // of the center container is larger than of the ItemSet, so we
  155. // can click in the empty area to create a new item or deselect an item.
  156. this.hammer = Hammer(this.body.dom.centerContainer, {
  157. prevent_default: true
  158. });
  159. // drag items when selected
  160. this.hammer.on('touch', this._onTouch.bind(this));
  161. this.hammer.on('dragstart', this._onDragStart.bind(this));
  162. this.hammer.on('drag', this._onDrag.bind(this));
  163. this.hammer.on('dragend', this._onDragEnd.bind(this));
  164. // single select (or unselect) when tapping an item
  165. this.hammer.on('tap', this._onSelectItem.bind(this));
  166. // multi select when holding mouse/touch, or on ctrl+click
  167. this.hammer.on('hold', this._onMultiSelectItem.bind(this));
  168. // add item on doubletap
  169. this.hammer.on('doubletap', this._onAddItem.bind(this));
  170. // attach to the DOM
  171. this.show();
  172. };
  173. /**
  174. * Set options for the ItemSet. Existing options will be extended/overwritten.
  175. * @param {Object} [options] The following options are available:
  176. * {String} type
  177. * Default type for the items. Choose from 'box'
  178. * (default), 'point', 'range', or 'background'.
  179. * The default style can be overwritten by
  180. * individual items.
  181. * {String} align
  182. * Alignment for the items, only applicable for
  183. * BoxItem. Choose 'center' (default), 'left', or
  184. * 'right'.
  185. * {String} orientation
  186. * Orientation of the item set. Choose 'top' or
  187. * 'bottom' (default).
  188. * {Function} groupOrder
  189. * A sorting function for ordering groups
  190. * {Boolean} stack
  191. * If true (deafult), items will be stacked on
  192. * top of each other.
  193. * {Number} margin.axis
  194. * Margin between the axis and the items in pixels.
  195. * Default is 20.
  196. * {Number} margin.item.horizontal
  197. * Horizontal margin between items in pixels.
  198. * Default is 10.
  199. * {Number} margin.item.vertical
  200. * Vertical Margin between items in pixels.
  201. * Default is 10.
  202. * {Number} margin.item
  203. * Margin between items in pixels in both horizontal
  204. * and vertical direction. Default is 10.
  205. * {Number} margin
  206. * Set margin for both axis and items in pixels.
  207. * {Number} padding
  208. * Padding of the contents of an item in pixels.
  209. * Must correspond with the items css. Default is 5.
  210. * {Boolean} selectable
  211. * If true (default), items can be selected.
  212. * {Boolean} editable
  213. * Set all editable options to true or false
  214. * {Boolean} editable.updateTime
  215. * Allow dragging an item to an other moment in time
  216. * {Boolean} editable.updateGroup
  217. * Allow dragging an item to an other group
  218. * {Boolean} editable.add
  219. * Allow creating new items on double tap
  220. * {Boolean} editable.remove
  221. * Allow removing items by clicking the delete button
  222. * top right of a selected item.
  223. * {Function(item: Item, callback: Function)} onAdd
  224. * Callback function triggered when an item is about to be added:
  225. * when the user double taps an empty space in the Timeline.
  226. * {Function(item: Item, callback: Function)} onUpdate
  227. * Callback function fired when an item is about to be updated.
  228. * This function typically has to show a dialog where the user
  229. * change the item. If not implemented, nothing happens.
  230. * {Function(item: Item, callback: Function)} onMove
  231. * Fired when an item has been moved. If not implemented,
  232. * the move action will be accepted.
  233. * {Function(item: Item, callback: Function)} onRemove
  234. * Fired when an item is about to be deleted.
  235. * If not implemented, the item will be always removed.
  236. */
  237. ItemSet.prototype.setOptions = function(options) {
  238. if (options) {
  239. // copy all options that we know
  240. var fields = ['type', 'align', 'orientation', 'padding', 'stack', 'selectable', 'groupOrder', 'dataAttributes', 'template','hide'];
  241. util.selectiveExtend(fields, this.options, options);
  242. if ('margin' in options) {
  243. if (typeof options.margin === 'number') {
  244. this.options.margin.axis = options.margin;
  245. this.options.margin.item.horizontal = options.margin;
  246. this.options.margin.item.vertical = options.margin;
  247. }
  248. else if (typeof options.margin === 'object') {
  249. util.selectiveExtend(['axis'], this.options.margin, options.margin);
  250. if ('item' in options.margin) {
  251. if (typeof options.margin.item === 'number') {
  252. this.options.margin.item.horizontal = options.margin.item;
  253. this.options.margin.item.vertical = options.margin.item;
  254. }
  255. else if (typeof options.margin.item === 'object') {
  256. util.selectiveExtend(['horizontal', 'vertical'], this.options.margin.item, options.margin.item);
  257. }
  258. }
  259. }
  260. }
  261. if ('editable' in options) {
  262. if (typeof options.editable === 'boolean') {
  263. this.options.editable.updateTime = options.editable;
  264. this.options.editable.updateGroup = options.editable;
  265. this.options.editable.add = options.editable;
  266. this.options.editable.remove = options.editable;
  267. }
  268. else if (typeof options.editable === 'object') {
  269. util.selectiveExtend(['updateTime', 'updateGroup', 'add', 'remove'], this.options.editable, options.editable);
  270. }
  271. }
  272. // callback functions
  273. var addCallback = (function (name) {
  274. var fn = options[name];
  275. if (fn) {
  276. if (!(fn instanceof Function)) {
  277. throw new Error('option ' + name + ' must be a function ' + name + '(item, callback)');
  278. }
  279. this.options[name] = fn;
  280. }
  281. }).bind(this);
  282. ['onAdd', 'onUpdate', 'onRemove', 'onMove', 'onMoving'].forEach(addCallback);
  283. // force the itemSet to refresh: options like orientation and margins may be changed
  284. this.markDirty();
  285. }
  286. };
  287. /**
  288. * Mark the ItemSet dirty so it will refresh everything with next redraw
  289. */
  290. ItemSet.prototype.markDirty = function() {
  291. this.groupIds = [];
  292. this.stackDirty = true;
  293. };
  294. /**
  295. * Destroy the ItemSet
  296. */
  297. ItemSet.prototype.destroy = function() {
  298. this.hide();
  299. this.setItems(null);
  300. this.setGroups(null);
  301. this.hammer = null;
  302. this.body = null;
  303. this.conversion = null;
  304. };
  305. /**
  306. * Hide the component from the DOM
  307. */
  308. ItemSet.prototype.hide = function() {
  309. // remove the frame containing the items
  310. if (this.dom.frame.parentNode) {
  311. this.dom.frame.parentNode.removeChild(this.dom.frame);
  312. }
  313. // remove the axis with dots
  314. if (this.dom.axis.parentNode) {
  315. this.dom.axis.parentNode.removeChild(this.dom.axis);
  316. }
  317. // remove the labelset containing all group labels
  318. if (this.dom.labelSet.parentNode) {
  319. this.dom.labelSet.parentNode.removeChild(this.dom.labelSet);
  320. }
  321. };
  322. /**
  323. * Show the component in the DOM (when not already visible).
  324. * @return {Boolean} changed
  325. */
  326. ItemSet.prototype.show = function() {
  327. // show frame containing the items
  328. if (!this.dom.frame.parentNode) {
  329. this.body.dom.center.appendChild(this.dom.frame);
  330. }
  331. // show axis with dots
  332. if (!this.dom.axis.parentNode) {
  333. this.body.dom.backgroundVertical.appendChild(this.dom.axis);
  334. }
  335. // show labelset containing labels
  336. if (!this.dom.labelSet.parentNode) {
  337. this.body.dom.left.appendChild(this.dom.labelSet);
  338. }
  339. };
  340. /**
  341. * Set selected items by their id. Replaces the current selection
  342. * Unknown id's are silently ignored.
  343. * @param {string[] | string} [ids] An array with zero or more id's of the items to be
  344. * selected, or a single item id. If ids is undefined
  345. * or an empty array, all items will be unselected.
  346. */
  347. ItemSet.prototype.setSelection = function(ids) {
  348. var i, ii, id, item;
  349. if (ids == undefined) ids = [];
  350. if (!Array.isArray(ids)) ids = [ids];
  351. // unselect currently selected items
  352. for (i = 0, ii = this.selection.length; i < ii; i++) {
  353. id = this.selection[i];
  354. item = this.items[id];
  355. if (item) item.unselect();
  356. }
  357. // select items
  358. this.selection = [];
  359. for (i = 0, ii = ids.length; i < ii; i++) {
  360. id = ids[i];
  361. item = this.items[id];
  362. if (item) {
  363. this.selection.push(id);
  364. item.select();
  365. }
  366. }
  367. };
  368. /**
  369. * Get the selected items by their id
  370. * @return {Array} ids The ids of the selected items
  371. */
  372. ItemSet.prototype.getSelection = function() {
  373. return this.selection.concat([]);
  374. };
  375. /**
  376. * Get the id's of the currently visible items.
  377. * @returns {Array} The ids of the visible items
  378. */
  379. ItemSet.prototype.getVisibleItems = function() {
  380. var range = this.body.range.getRange();
  381. var left = this.body.util.toScreen(range.start);
  382. var right = this.body.util.toScreen(range.end);
  383. var ids = [];
  384. for (var groupId in this.groups) {
  385. if (this.groups.hasOwnProperty(groupId)) {
  386. var group = this.groups[groupId];
  387. var rawVisibleItems = group.visibleItems;
  388. // filter the "raw" set with visibleItems into a set which is really
  389. // visible by pixels
  390. for (var i = 0; i < rawVisibleItems.length; i++) {
  391. var item = rawVisibleItems[i];
  392. // TODO: also check whether visible vertically
  393. if ((item.left < right) && (item.left + item.width > left)) {
  394. ids.push(item.id);
  395. }
  396. }
  397. }
  398. }
  399. return ids;
  400. };
  401. /**
  402. * Deselect a selected item
  403. * @param {String | Number} id
  404. * @private
  405. */
  406. ItemSet.prototype._deselect = function(id) {
  407. var selection = this.selection;
  408. for (var i = 0, ii = selection.length; i < ii; i++) {
  409. if (selection[i] == id) { // non-strict comparison!
  410. selection.splice(i, 1);
  411. break;
  412. }
  413. }
  414. };
  415. /**
  416. * Repaint the component
  417. * @return {boolean} Returns true if the component is resized
  418. */
  419. ItemSet.prototype.redraw = function() {
  420. var margin = this.options.margin,
  421. range = this.body.range,
  422. asSize = util.option.asSize,
  423. options = this.options,
  424. orientation = options.orientation,
  425. resized = false,
  426. frame = this.dom.frame,
  427. editable = options.editable.updateTime || options.editable.updateGroup;
  428. // recalculate absolute position (before redrawing groups)
  429. this.props.top = this.body.domProps.top.height + this.body.domProps.border.top;
  430. this.props.left = this.body.domProps.left.width + this.body.domProps.border.left;
  431. // update class name
  432. frame.className = 'itemset' + (editable ? ' editable' : '');
  433. // reorder the groups (if needed)
  434. resized = this._orderGroups() || resized;
  435. // check whether zoomed (in that case we need to re-stack everything)
  436. // TODO: would be nicer to get this as a trigger from Range
  437. var visibleInterval = range.end - range.start;
  438. var zoomed = (visibleInterval != this.lastVisibleInterval) || (this.props.width != this.props.lastWidth);
  439. if (zoomed) this.stackDirty = true;
  440. this.lastVisibleInterval = visibleInterval;
  441. this.props.lastWidth = this.props.width;
  442. var restack = this.stackDirty;
  443. var firstGroup = this._firstGroup();
  444. var firstMargin = {
  445. item: margin.item,
  446. axis: margin.axis
  447. };
  448. var nonFirstMargin = {
  449. item: margin.item,
  450. axis: margin.item.vertical / 2
  451. };
  452. var height = 0;
  453. var minHeight = margin.axis + margin.item.vertical;
  454. // redraw the background group
  455. this.groups[BACKGROUND].redraw(range, nonFirstMargin, restack);
  456. // redraw all regular groups
  457. util.forEach(this.groups, function (group) {
  458. var groupMargin = (group == firstGroup) ? firstMargin : nonFirstMargin;
  459. var groupResized = group.redraw(range, groupMargin, restack);
  460. resized = groupResized || resized;
  461. height += group.height;
  462. });
  463. height = Math.max(height, minHeight);
  464. this.stackDirty = false;
  465. // update frame height
  466. frame.style.height = asSize(height);
  467. // calculate actual size
  468. this.props.width = frame.offsetWidth;
  469. this.props.height = height;
  470. // reposition axis
  471. this.dom.axis.style.top = asSize((orientation == 'top') ?
  472. (this.body.domProps.top.height + this.body.domProps.border.top) :
  473. (this.body.domProps.top.height + this.body.domProps.centerContainer.height));
  474. this.dom.axis.style.left = '0';
  475. // check if this component is resized
  476. resized = this._isResized() || resized;
  477. return resized;
  478. };
  479. /**
  480. * Get the first group, aligned with the axis
  481. * @return {Group | null} firstGroup
  482. * @private
  483. */
  484. ItemSet.prototype._firstGroup = function() {
  485. var firstGroupIndex = (this.options.orientation == 'top') ? 0 : (this.groupIds.length - 1);
  486. var firstGroupId = this.groupIds[firstGroupIndex];
  487. var firstGroup = this.groups[firstGroupId] || this.groups[UNGROUPED];
  488. return firstGroup || null;
  489. };
  490. /**
  491. * Create or delete the group holding all ungrouped items. This group is used when
  492. * there are no groups specified.
  493. * @protected
  494. */
  495. ItemSet.prototype._updateUngrouped = function() {
  496. var ungrouped = this.groups[UNGROUPED];
  497. var background = this.groups[BACKGROUND];
  498. var item, itemId;
  499. if (this.groupsData) {
  500. // remove the group holding all ungrouped items
  501. if (ungrouped) {
  502. ungrouped.hide();
  503. delete this.groups[UNGROUPED];
  504. for (itemId in this.items) {
  505. if (this.items.hasOwnProperty(itemId)) {
  506. item = this.items[itemId];
  507. item.parent && item.parent.remove(item);
  508. var groupId = this._getGroupId(item.data);
  509. var group = this.groups[groupId];
  510. group && group.add(item) || item.hide();
  511. }
  512. }
  513. }
  514. }
  515. else {
  516. // create a group holding all (unfiltered) items
  517. if (!ungrouped) {
  518. var id = null;
  519. var data = null;
  520. ungrouped = new Group(id, data, this);
  521. this.groups[UNGROUPED] = ungrouped;
  522. for (itemId in this.items) {
  523. if (this.items.hasOwnProperty(itemId)) {
  524. item = this.items[itemId];
  525. ungrouped.add(item);
  526. }
  527. }
  528. ungrouped.show();
  529. }
  530. }
  531. };
  532. /**
  533. * Get the element for the labelset
  534. * @return {HTMLElement} labelSet
  535. */
  536. ItemSet.prototype.getLabelSet = function() {
  537. return this.dom.labelSet;
  538. };
  539. /**
  540. * Set items
  541. * @param {vis.DataSet | null} items
  542. */
  543. ItemSet.prototype.setItems = function(items) {
  544. var me = this,
  545. ids,
  546. oldItemsData = this.itemsData;
  547. // replace the dataset
  548. if (!items) {
  549. this.itemsData = null;
  550. }
  551. else if (items instanceof DataSet || items instanceof DataView) {
  552. this.itemsData = items;
  553. }
  554. else {
  555. throw new TypeError('Data must be an instance of DataSet or DataView');
  556. }
  557. if (oldItemsData) {
  558. // unsubscribe from old dataset
  559. util.forEach(this.itemListeners, function (callback, event) {
  560. oldItemsData.off(event, callback);
  561. });
  562. // remove all drawn items
  563. ids = oldItemsData.getIds();
  564. this._onRemove(ids);
  565. }
  566. if (this.itemsData) {
  567. // subscribe to new dataset
  568. var id = this.id;
  569. util.forEach(this.itemListeners, function (callback, event) {
  570. me.itemsData.on(event, callback, id);
  571. });
  572. // add all new items
  573. ids = this.itemsData.getIds();
  574. this._onAdd(ids);
  575. // update the group holding all ungrouped items
  576. this._updateUngrouped();
  577. }
  578. };
  579. /**
  580. * Get the current items
  581. * @returns {vis.DataSet | null}
  582. */
  583. ItemSet.prototype.getItems = function() {
  584. return this.itemsData;
  585. };
  586. /**
  587. * Set groups
  588. * @param {vis.DataSet} groups
  589. */
  590. ItemSet.prototype.setGroups = function(groups) {
  591. var me = this,
  592. ids;
  593. // unsubscribe from current dataset
  594. if (this.groupsData) {
  595. util.forEach(this.groupListeners, function (callback, event) {
  596. me.groupsData.unsubscribe(event, callback);
  597. });
  598. // remove all drawn groups
  599. ids = this.groupsData.getIds();
  600. this.groupsData = null;
  601. this._onRemoveGroups(ids); // note: this will cause a redraw
  602. }
  603. // replace the dataset
  604. if (!groups) {
  605. this.groupsData = null;
  606. }
  607. else if (groups instanceof DataSet || groups instanceof DataView) {
  608. this.groupsData = groups;
  609. }
  610. else {
  611. throw new TypeError('Data must be an instance of DataSet or DataView');
  612. }
  613. if (this.groupsData) {
  614. // subscribe to new dataset
  615. var id = this.id;
  616. util.forEach(this.groupListeners, function (callback, event) {
  617. me.groupsData.on(event, callback, id);
  618. });
  619. // draw all ms
  620. ids = this.groupsData.getIds();
  621. this._onAddGroups(ids);
  622. }
  623. // update the group holding all ungrouped items
  624. this._updateUngrouped();
  625. // update the order of all items in each group
  626. this._order();
  627. this.body.emitter.emit('change', {queue: true});
  628. };
  629. /**
  630. * Get the current groups
  631. * @returns {vis.DataSet | null} groups
  632. */
  633. ItemSet.prototype.getGroups = function() {
  634. return this.groupsData;
  635. };
  636. /**
  637. * Remove an item by its id
  638. * @param {String | Number} id
  639. */
  640. ItemSet.prototype.removeItem = function(id) {
  641. var item = this.itemsData.get(id),
  642. dataset = this.itemsData.getDataSet();
  643. if (item) {
  644. // confirm deletion
  645. this.options.onRemove(item, function (item) {
  646. if (item) {
  647. // remove by id here, it is possible that an item has no id defined
  648. // itself, so better not delete by the item itself
  649. dataset.remove(id);
  650. }
  651. });
  652. }
  653. };
  654. /**
  655. * Get the time of an item based on it's data and options.type
  656. * @param {Object} itemData
  657. * @returns {string} Returns the type
  658. * @private
  659. */
  660. ItemSet.prototype._getType = function (itemData) {
  661. return itemData.type || this.options.type || (itemData.end ? 'range' : 'box');
  662. };
  663. /**
  664. * Get the group id for an item
  665. * @param {Object} itemData
  666. * @returns {string} Returns the groupId
  667. * @private
  668. */
  669. ItemSet.prototype._getGroupId = function (itemData) {
  670. var type = this._getType(itemData);
  671. if (type == 'background' && itemData.group == undefined) {
  672. return BACKGROUND;
  673. }
  674. else {
  675. return this.groupsData ? itemData.group : UNGROUPED;
  676. }
  677. };
  678. /**
  679. * Handle updated items
  680. * @param {Number[]} ids
  681. * @protected
  682. */
  683. ItemSet.prototype._onUpdate = function(ids) {
  684. var me = this;
  685. ids.forEach(function (id) {
  686. var itemData = me.itemsData.get(id, me.itemOptions);
  687. var item = me.items[id];
  688. var type = me._getType(itemData);
  689. var constructor = ItemSet.types[type];
  690. if (item) {
  691. // update item
  692. if (!constructor || !(item instanceof constructor)) {
  693. // item type has changed, delete the item and recreate it
  694. me._removeItem(item);
  695. item = null;
  696. }
  697. else {
  698. me._updateItem(item, itemData);
  699. }
  700. }
  701. if (!item) {
  702. // create item
  703. if (constructor) {
  704. item = new constructor(itemData, me.conversion, me.options);
  705. item.id = id; // TODO: not so nice setting id afterwards
  706. me._addItem(item);
  707. }
  708. else if (type == 'rangeoverflow') {
  709. // TODO: deprecated since version 2.1.0 (or 3.0.0?). cleanup some day
  710. throw new TypeError('Item type "rangeoverflow" is deprecated. Use css styling instead: ' +
  711. '.vis.timeline .item.range .content {overflow: visible;}');
  712. }
  713. else {
  714. throw new TypeError('Unknown item type "' + type + '"');
  715. }
  716. }
  717. });
  718. this._order();
  719. this.stackDirty = true; // force re-stacking of all items next redraw
  720. this.body.emitter.emit('change', {queue: true});
  721. };
  722. /**
  723. * Handle added items
  724. * @param {Number[]} ids
  725. * @protected
  726. */
  727. ItemSet.prototype._onAdd = ItemSet.prototype._onUpdate;
  728. /**
  729. * Handle removed items
  730. * @param {Number[]} ids
  731. * @protected
  732. */
  733. ItemSet.prototype._onRemove = function(ids) {
  734. var count = 0;
  735. var me = this;
  736. ids.forEach(function (id) {
  737. var item = me.items[id];
  738. if (item) {
  739. count++;
  740. me._removeItem(item);
  741. }
  742. });
  743. if (count) {
  744. // update order
  745. this._order();
  746. this.stackDirty = true; // force re-stacking of all items next redraw
  747. this.body.emitter.emit('change', {queue: true});
  748. }
  749. };
  750. /**
  751. * Update the order of item in all groups
  752. * @private
  753. */
  754. ItemSet.prototype._order = function() {
  755. // reorder the items in all groups
  756. // TODO: optimization: only reorder groups affected by the changed items
  757. util.forEach(this.groups, function (group) {
  758. group.order();
  759. });
  760. };
  761. /**
  762. * Handle updated groups
  763. * @param {Number[]} ids
  764. * @private
  765. */
  766. ItemSet.prototype._onUpdateGroups = function(ids) {
  767. this._onAddGroups(ids);
  768. };
  769. /**
  770. * Handle changed groups (added or updated)
  771. * @param {Number[]} ids
  772. * @private
  773. */
  774. ItemSet.prototype._onAddGroups = function(ids) {
  775. var me = this;
  776. ids.forEach(function (id) {
  777. var groupData = me.groupsData.get(id);
  778. var group = me.groups[id];
  779. if (!group) {
  780. // check for reserved ids
  781. if (id == UNGROUPED || id == BACKGROUND) {
  782. throw new Error('Illegal group id. ' + id + ' is a reserved id.');
  783. }
  784. var groupOptions = Object.create(me.options);
  785. util.extend(groupOptions, {
  786. height: null
  787. });
  788. group = new Group(id, groupData, me);
  789. me.groups[id] = group;
  790. // add items with this groupId to the new group
  791. for (var itemId in me.items) {
  792. if (me.items.hasOwnProperty(itemId)) {
  793. var item = me.items[itemId];
  794. if (item.data.group == id) {
  795. group.add(item);
  796. }
  797. }
  798. }
  799. group.order();
  800. group.show();
  801. }
  802. else {
  803. // update group
  804. group.setData(groupData);
  805. }
  806. });
  807. this.body.emitter.emit('change', {queue: true});
  808. };
  809. /**
  810. * Handle removed groups
  811. * @param {Number[]} ids
  812. * @private
  813. */
  814. ItemSet.prototype._onRemoveGroups = function(ids) {
  815. var groups = this.groups;
  816. ids.forEach(function (id) {
  817. var group = groups[id];
  818. if (group) {
  819. group.hide();
  820. delete groups[id];
  821. }
  822. });
  823. this.markDirty();
  824. this.body.emitter.emit('change', {queue: true});
  825. };
  826. /**
  827. * Reorder the groups if needed
  828. * @return {boolean} changed
  829. * @private
  830. */
  831. ItemSet.prototype._orderGroups = function () {
  832. if (this.groupsData) {
  833. // reorder the groups
  834. var groupIds = this.groupsData.getIds({
  835. order: this.options.groupOrder
  836. });
  837. var changed = !util.equalArray(groupIds, this.groupIds);
  838. if (changed) {
  839. // hide all groups, removes them from the DOM
  840. var groups = this.groups;
  841. groupIds.forEach(function (groupId) {
  842. groups[groupId].hide();
  843. });
  844. // show the groups again, attach them to the DOM in correct order
  845. groupIds.forEach(function (groupId) {
  846. groups[groupId].show();
  847. });
  848. this.groupIds = groupIds;
  849. }
  850. return changed;
  851. }
  852. else {
  853. return false;
  854. }
  855. };
  856. /**
  857. * Add a new item
  858. * @param {Item} item
  859. * @private
  860. */
  861. ItemSet.prototype._addItem = function(item) {
  862. this.items[item.id] = item;
  863. // add to group
  864. var groupId = this._getGroupId(item.data);
  865. var group = this.groups[groupId];
  866. if (group) group.add(item);
  867. };
  868. /**
  869. * Update an existing item
  870. * @param {Item} item
  871. * @param {Object} itemData
  872. * @private
  873. */
  874. ItemSet.prototype._updateItem = function(item, itemData) {
  875. var oldGroupId = item.data.group;
  876. // update the items data (will redraw the item when displayed)
  877. item.setData(itemData);
  878. // update group
  879. if (oldGroupId != item.data.group) {
  880. var oldGroup = this.groups[oldGroupId];
  881. if (oldGroup) oldGroup.remove(item);
  882. var groupId = this._getGroupId(item.data);
  883. var group = this.groups[groupId];
  884. if (group) group.add(item);
  885. }
  886. };
  887. /**
  888. * Delete an item from the ItemSet: remove it from the DOM, from the map
  889. * with items, and from the map with visible items, and from the selection
  890. * @param {Item} item
  891. * @private
  892. */
  893. ItemSet.prototype._removeItem = function(item) {
  894. // remove from DOM
  895. item.hide();
  896. // remove from items
  897. delete this.items[item.id];
  898. // remove from selection
  899. var index = this.selection.indexOf(item.id);
  900. if (index != -1) this.selection.splice(index, 1);
  901. // remove from group
  902. item.parent && item.parent.remove(item);
  903. };
  904. /**
  905. * Create an array containing all items being a range (having an end date)
  906. * @param array
  907. * @returns {Array}
  908. * @private
  909. */
  910. ItemSet.prototype._constructByEndArray = function(array) {
  911. var endArray = [];
  912. for (var i = 0; i < array.length; i++) {
  913. if (array[i] instanceof RangeItem) {
  914. endArray.push(array[i]);
  915. }
  916. }
  917. return endArray;
  918. };
  919. /**
  920. * Register the clicked item on touch, before dragStart is initiated.
  921. *
  922. * dragStart is initiated from a mousemove event, which can have left the item
  923. * already resulting in an item == null
  924. *
  925. * @param {Event} event
  926. * @private
  927. */
  928. ItemSet.prototype._onTouch = function (event) {
  929. // store the touched item, used in _onDragStart
  930. this.touchParams.item = ItemSet.itemFromTarget(event);
  931. };
  932. /**
  933. * Start dragging the selected events
  934. * @param {Event} event
  935. * @private
  936. */
  937. ItemSet.prototype._onDragStart = function (event) {
  938. if (!this.options.editable.updateTime && !this.options.editable.updateGroup) {
  939. return;
  940. }
  941. var item = this.touchParams.item || null;
  942. var me = this;
  943. var props;
  944. if (item && item.selected) {
  945. var dragLeftItem = event.target.dragLeftItem;
  946. var dragRightItem = event.target.dragRightItem;
  947. if (dragLeftItem) {
  948. props = {
  949. item: dragLeftItem,
  950. initialX: event.gesture.center.clientX
  951. };
  952. if (me.options.editable.updateTime) {
  953. props.start = item.data.start.valueOf();
  954. }
  955. if (me.options.editable.updateGroup) {
  956. if ('group' in item.data) props.group = item.data.group;
  957. }
  958. this.touchParams.itemProps = [props];
  959. }
  960. else if (dragRightItem) {
  961. props = {
  962. item: dragRightItem,
  963. initialX: event.gesture.center.clientX
  964. };
  965. if (me.options.editable.updateTime) {
  966. props.end = item.data.end.valueOf();
  967. }
  968. if (me.options.editable.updateGroup) {
  969. if ('group' in item.data) props.group = item.data.group;
  970. }
  971. this.touchParams.itemProps = [props];
  972. }
  973. else {
  974. this.touchParams.itemProps = this.getSelection().map(function (id) {
  975. var item = me.items[id];
  976. var props = {
  977. item: item,
  978. initialX: event.gesture.center.clientX
  979. };
  980. if (me.options.editable.updateTime) {
  981. if ('start' in item.data) props.start = item.data.start.valueOf();
  982. if ('end' in item.data) props.end = item.data.end.valueOf();
  983. }
  984. if (me.options.editable.updateGroup) {
  985. if ('group' in item.data) props.group = item.data.group;
  986. }
  987. return props;
  988. });
  989. }
  990. event.stopPropagation();
  991. }
  992. };
  993. /**
  994. * Drag selected items
  995. * @param {Event} event
  996. * @private
  997. */
  998. ItemSet.prototype._onDrag = function (event) {
  999. if (this.touchParams.itemProps) {
  1000. var me = this;
  1001. var snap = this.body.util.snap || null;
  1002. var xOffset = this.body.dom.root.offsetLeft + this.body.domProps.left.width;
  1003. // move
  1004. this.touchParams.itemProps.forEach(function (props) {
  1005. var newProps = {};
  1006. var current = me.body.util.toTime(event.gesture.center.clientX - xOffset);
  1007. var initial = me.body.util.toTime(props.initialX - xOffset);
  1008. var offset = current - initial;
  1009. if ('start' in props) {
  1010. var start = new Date(props.start + offset);
  1011. newProps.start = snap ? snap(start) : start;
  1012. }
  1013. if ('end' in props) {
  1014. var end = new Date(props.end + offset);
  1015. newProps.end = snap ? snap(end) : end;
  1016. }
  1017. if ('group' in props) {
  1018. // drag from one group to another
  1019. var group = ItemSet.groupFromTarget(event);
  1020. newProps.group = group && group.groupId;
  1021. }
  1022. // confirm moving the item
  1023. var itemData = util.extend({}, props.item.data, newProps);
  1024. me.options.onMoving(itemData, function (itemData) {
  1025. if (itemData) {
  1026. me._updateItemProps(props.item, itemData);
  1027. }
  1028. });
  1029. });
  1030. this.stackDirty = true; // force re-stacking of all items next redraw
  1031. this.body.emitter.emit('change');
  1032. event.stopPropagation();
  1033. }
  1034. };
  1035. /**
  1036. * Update an items properties
  1037. * @param {Item} item
  1038. * @param {Object} props Can contain properties start, end, and group.
  1039. * @private
  1040. */
  1041. ItemSet.prototype._updateItemProps = function(item, props) {
  1042. // TODO: copy all properties from props to item? (also new ones)
  1043. if ('start' in props) item.data.start = props.start;
  1044. if ('end' in props) item.data.end = props.end;
  1045. if ('group' in props && item.data.group != props.group) {
  1046. this._moveToGroup(item, props.group)
  1047. }
  1048. };
  1049. /**
  1050. * Move an item to another group
  1051. * @param {Item} item
  1052. * @param {String | Number} groupId
  1053. * @private
  1054. */
  1055. ItemSet.prototype._moveToGroup = function(item, groupId) {
  1056. var group = this.groups[groupId];
  1057. if (group && group.groupId != item.data.group) {
  1058. var oldGroup = item.parent;
  1059. oldGroup.remove(item);
  1060. oldGroup.order();
  1061. group.add(item);
  1062. group.order();
  1063. item.data.group = group.groupId;
  1064. }
  1065. };
  1066. /**
  1067. * End of dragging selected items
  1068. * @param {Event} event
  1069. * @private
  1070. */
  1071. ItemSet.prototype._onDragEnd = function (event) {
  1072. if (this.touchParams.itemProps) {
  1073. // prepare a change set for the changed items
  1074. var changes = [],
  1075. me = this,
  1076. dataset = this.itemsData.getDataSet();
  1077. var itemProps = this.touchParams.itemProps ;
  1078. this.touchParams.itemProps = null;
  1079. itemProps.forEach(function (props) {
  1080. var id = props.item.id,
  1081. itemData = me.itemsData.get(id, me.itemOptions);
  1082. var changed = false;
  1083. if ('start' in props.item.data) {
  1084. changed = (props.start != props.item.data.start.valueOf());
  1085. itemData.start = util.convert(props.item.data.start,
  1086. dataset._options.type && dataset._options.type.start || 'Date');
  1087. }
  1088. if ('end' in props.item.data) {
  1089. changed = changed || (props.end != props.item.data.end.valueOf());
  1090. itemData.end = util.convert(props.item.data.end,
  1091. dataset._options.type && dataset._options.type.end || 'Date');
  1092. }
  1093. if ('group' in props.item.data) {
  1094. changed = changed || (props.group != props.item.data.group);
  1095. itemData.group = props.item.data.group;
  1096. }
  1097. // only apply changes when start or end is actually changed
  1098. if (changed) {
  1099. me.options.onMove(itemData, function (itemData) {
  1100. if (itemData) {
  1101. // apply changes
  1102. itemData[dataset._fieldId] = id; // ensure the item contains its id (can be undefined)
  1103. changes.push(itemData);
  1104. }
  1105. else {
  1106. // restore original values
  1107. me._updateItemProps(props.item, props);
  1108. me.stackDirty = true; // force re-stacking of all items next redraw
  1109. me.body.emitter.emit('change');
  1110. }
  1111. });
  1112. }
  1113. });
  1114. // apply the changes to the data (if there are changes)
  1115. if (changes.length) {
  1116. dataset.update(changes);
  1117. }
  1118. event.stopPropagation();
  1119. }
  1120. };
  1121. /**
  1122. * Handle selecting/deselecting an item when tapping it
  1123. * @param {Event} event
  1124. * @private
  1125. */
  1126. ItemSet.prototype._onSelectItem = function (event) {
  1127. if (!this.options.selectable) return;
  1128. var ctrlKey = event.gesture.srcEvent && event.gesture.srcEvent.ctrlKey;
  1129. var shiftKey = event.gesture.srcEvent && event.gesture.srcEvent.shiftKey;
  1130. if (ctrlKey || shiftKey) {
  1131. this._onMultiSelectItem(event);
  1132. return;
  1133. }
  1134. var oldSelection = this.getSelection();
  1135. var item = ItemSet.itemFromTarget(event);
  1136. var selection = item ? [item.id] : [];
  1137. this.setSelection(selection);
  1138. var newSelection = this.getSelection();
  1139. // emit a select event,
  1140. // except when old selection is empty and new selection is still empty
  1141. if (newSelection.length > 0 || oldSelection.length > 0) {
  1142. this.body.emitter.emit('select', {
  1143. items: this.getSelection()
  1144. });
  1145. }
  1146. };
  1147. /**
  1148. * Handle creation and updates of an item on double tap
  1149. * @param event
  1150. * @private
  1151. */
  1152. ItemSet.prototype._onAddItem = function (event) {
  1153. if (!this.options.selectable) return;
  1154. if (!this.options.editable.add) return;
  1155. var me = this,
  1156. snap = this.body.util.snap || null,
  1157. item = ItemSet.itemFromTarget(event);
  1158. if (item) {
  1159. // update item
  1160. // execute async handler to update the item (or cancel it)
  1161. var itemData = me.itemsData.get(item.id); // get a clone of the data from the dataset
  1162. this.options.onUpdate(itemData, function (itemData) {
  1163. if (itemData) {
  1164. me.itemsData.update(itemData);
  1165. }
  1166. });
  1167. }
  1168. else {
  1169. // add item
  1170. var xAbs = util.getAbsoluteLeft(this.dom.frame);
  1171. var x = event.gesture.center.pageX - xAbs;
  1172. var start = this.body.util.toTime(x);
  1173. var newItem = {
  1174. start: snap ? snap(start) : start,
  1175. content: 'new item'
  1176. };
  1177. // when default type is a range, add a default end date to the new item
  1178. if (this.options.type === 'range') {
  1179. var end = this.body.util.toTime(x + this.props.width / 5);
  1180. newItem.end = snap ? snap(end) : end;
  1181. }
  1182. newItem[this.itemsData._fieldId] = util.randomUUID();
  1183. var group = ItemSet.groupFromTarget(event);
  1184. if (group) {
  1185. newItem.group = group.groupId;
  1186. }
  1187. // execute async handler to customize (or cancel) adding an item
  1188. this.options.onAdd(newItem, function (item) {
  1189. if (item) {
  1190. me.itemsData.add(item);
  1191. // TODO: need to trigger a redraw?
  1192. }
  1193. });
  1194. }
  1195. };
  1196. /**
  1197. * Handle selecting/deselecting multiple items when holding an item
  1198. * @param {Event} event
  1199. * @private
  1200. */
  1201. ItemSet.prototype._onMultiSelectItem = function (event) {
  1202. if (!this.options.selectable) return;
  1203. var selection,
  1204. item = ItemSet.itemFromTarget(event);
  1205. if (item) {
  1206. // multi select items
  1207. selection = this.getSelection(); // current selection
  1208. var index = selection.indexOf(item.id);
  1209. if (index == -1) {
  1210. // item is not yet selected -> select it
  1211. selection.push(item.id);
  1212. }
  1213. else {
  1214. // item is already selected -> deselect it
  1215. selection.splice(index, 1);
  1216. }
  1217. this.setSelection(selection);
  1218. this.body.emitter.emit('select', {
  1219. items: this.getSelection()
  1220. });
  1221. }
  1222. };
  1223. /**
  1224. * Find an item from an event target:
  1225. * searches for the attribute 'timeline-item' in the event target's element tree
  1226. * @param {Event} event
  1227. * @return {Item | null} item
  1228. */
  1229. ItemSet.itemFromTarget = function(event) {
  1230. var target = event.target;
  1231. while (target) {
  1232. if (target.hasOwnProperty('timeline-item')) {
  1233. return target['timeline-item'];
  1234. }
  1235. target = target.parentNode;
  1236. }
  1237. return null;
  1238. };
  1239. /**
  1240. * Find the Group from an event target:
  1241. * searches for the attribute 'timeline-group' in the event target's element tree
  1242. * @param {Event} event
  1243. * @return {Group | null} group
  1244. */
  1245. ItemSet.groupFromTarget = function(event) {
  1246. var target = event.target;
  1247. while (target) {
  1248. if (target.hasOwnProperty('timeline-group')) {
  1249. return target['timeline-group'];
  1250. }
  1251. target = target.parentNode;
  1252. }
  1253. return null;
  1254. };
  1255. /**
  1256. * Find the ItemSet from an event target:
  1257. * searches for the attribute 'timeline-itemset' in the event target's element tree
  1258. * @param {Event} event
  1259. * @return {ItemSet | null} item
  1260. */
  1261. ItemSet.itemSetFromTarget = function(event) {
  1262. var target = event.target;
  1263. while (target) {
  1264. if (target.hasOwnProperty('timeline-itemset')) {
  1265. return target['timeline-itemset'];
  1266. }
  1267. target = target.parentNode;
  1268. }
  1269. return null;
  1270. };
  1271. module.exports = ItemSet;