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1641 lines
46 KiB
1641 lines
46 KiB
var Hammer = require('../../module/hammer');
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var util = require('../../util');
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var DataSet = require('../../DataSet');
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var DataView = require('../../DataView');
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var TimeStep = require('../TimeStep');
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var Component = require('./Component');
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var Group = require('./Group');
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var BackgroundGroup = require('./BackgroundGroup');
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var BoxItem = require('./item/BoxItem');
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var PointItem = require('./item/PointItem');
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var RangeItem = require('./item/RangeItem');
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var BackgroundItem = require('./item/BackgroundItem');
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var UNGROUPED = '__ungrouped__'; // reserved group id for ungrouped items
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var BACKGROUND = '__background__'; // reserved group id for background items without group
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/**
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* An ItemSet holds a set of items and ranges which can be displayed in a
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* range. The width is determined by the parent of the ItemSet, and the height
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* is determined by the size of the items.
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* @param {{dom: Object, domProps: Object, emitter: Emitter, range: Range}} body
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* @param {Object} [options] See ItemSet.setOptions for the available options.
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* @constructor ItemSet
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* @extends Component
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*/
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function ItemSet(body, options) {
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this.body = body;
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this.defaultOptions = {
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type: null, // 'box', 'point', 'range', 'background'
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orientation: {
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item: 'bottom' // item orientation: 'top' or 'bottom'
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},
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align: 'auto', // alignment of box items
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stack: true,
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groupOrder: null,
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selectable: true,
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multiselect: false,
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editable: {
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updateTime: false,
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updateGroup: false,
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add: false,
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remove: false
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},
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snap: TimeStep.snap,
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onAdd: function (item, callback) {
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callback(item);
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},
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onUpdate: function (item, callback) {
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callback(item);
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},
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onMove: function (item, callback) {
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callback(item);
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},
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onRemove: function (item, callback) {
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callback(item);
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},
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onMoving: function (item, callback) {
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callback(item);
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},
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margin: {
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item: {
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horizontal: 10,
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vertical: 10
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},
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axis: 20
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}
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};
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// options is shared by this ItemSet and all its items
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this.options = util.extend({}, this.defaultOptions);
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// options for getting items from the DataSet with the correct type
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this.itemOptions = {
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type: {start: 'Date', end: 'Date'}
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};
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this.conversion = {
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toScreen: body.util.toScreen,
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toTime: body.util.toTime
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};
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this.dom = {};
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this.props = {};
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this.hammer = null;
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var me = this;
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this.itemsData = null; // DataSet
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this.groupsData = null; // DataSet
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// listeners for the DataSet of the items
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this.itemListeners = {
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'add': function (event, params, senderId) {
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me._onAdd(params.items);
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},
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'update': function (event, params, senderId) {
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me._onUpdate(params.items);
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},
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'remove': function (event, params, senderId) {
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me._onRemove(params.items);
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}
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};
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// listeners for the DataSet of the groups
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this.groupListeners = {
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'add': function (event, params, senderId) {
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me._onAddGroups(params.items);
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},
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'update': function (event, params, senderId) {
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me._onUpdateGroups(params.items);
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},
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'remove': function (event, params, senderId) {
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me._onRemoveGroups(params.items);
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}
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};
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this.items = {}; // object with an Item for every data item
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this.groups = {}; // Group object for every group
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this.groupIds = [];
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this.selection = []; // list with the ids of all selected nodes
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this.stackDirty = true; // if true, all items will be restacked on next redraw
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this.touchParams = {}; // stores properties while dragging
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// create the HTML DOM
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this._create();
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this.setOptions(options);
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}
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ItemSet.prototype = new Component();
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// available item types will be registered here
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ItemSet.types = {
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background: BackgroundItem,
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box: BoxItem,
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range: RangeItem,
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point: PointItem
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};
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/**
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* Create the HTML DOM for the ItemSet
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*/
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ItemSet.prototype._create = function(){
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var frame = document.createElement('div');
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frame.className = 'vis-itemset';
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frame['timeline-itemset'] = this;
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this.dom.frame = frame;
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// create background panel
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var background = document.createElement('div');
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background.className = 'vis-background';
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frame.appendChild(background);
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this.dom.background = background;
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// create foreground panel
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var foreground = document.createElement('div');
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foreground.className = 'vis-foreground';
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frame.appendChild(foreground);
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this.dom.foreground = foreground;
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// create axis panel
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var axis = document.createElement('div');
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axis.className = 'vis-axis';
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this.dom.axis = axis;
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// create labelset
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var labelSet = document.createElement('div');
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labelSet.className = 'vis-labelset';
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this.dom.labelSet = labelSet;
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// create ungrouped Group
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this._updateUngrouped();
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// create background Group
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var backgroundGroup = new BackgroundGroup(BACKGROUND, null, this);
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backgroundGroup.show();
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this.groups[BACKGROUND] = backgroundGroup;
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// attach event listeners
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// Note: we bind to the centerContainer for the case where the height
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// of the center container is larger than of the ItemSet, so we
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// can click in the empty area to create a new item or deselect an item.
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this.hammer = new Hammer(this.body.dom.centerContainer);
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// drag items when selected
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this.hammer.on('hammer.input', function (event) {
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if (event.isFirst) {
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this._onTouch(event);
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}
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}.bind(this));
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this.hammer.on('panstart', this._onDragStart.bind(this));
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this.hammer.on('panmove', this._onDrag.bind(this));
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this.hammer.on('panend', this._onDragEnd.bind(this));
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// single select (or unselect) when tapping an item
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this.hammer.on('tap', this._onSelectItem.bind(this));
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// multi select when holding mouse/touch, or on ctrl+click
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this.hammer.on('press', this._onMultiSelectItem.bind(this));
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// add item on doubletap
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this.hammer.on('doubletap', this._onAddItem.bind(this));
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// attach to the DOM
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this.show();
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};
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/**
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* Set options for the ItemSet. Existing options will be extended/overwritten.
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* @param {Object} [options] The following options are available:
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* {String} type
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* Default type for the items. Choose from 'box'
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* (default), 'point', 'range', or 'background'.
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* The default style can be overwritten by
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* individual items.
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* {String} align
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* Alignment for the items, only applicable for
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* BoxItem. Choose 'center' (default), 'left', or
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* 'right'.
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* {String} orientation.item
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* Orientation of the item set. Choose 'top' or
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* 'bottom' (default).
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* {Function} groupOrder
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* A sorting function for ordering groups
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* {Boolean} stack
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* If true (default), items will be stacked on
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* top of each other.
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* {Number} margin.axis
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* Margin between the axis and the items in pixels.
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* Default is 20.
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* {Number} margin.item.horizontal
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* Horizontal margin between items in pixels.
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* Default is 10.
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* {Number} margin.item.vertical
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* Vertical Margin between items in pixels.
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* Default is 10.
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* {Number} margin.item
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* Margin between items in pixels in both horizontal
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* and vertical direction. Default is 10.
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* {Number} margin
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* Set margin for both axis and items in pixels.
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* {Boolean} selectable
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* If true (default), items can be selected.
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* {Boolean} multiselect
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* If true, multiple items can be selected.
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* False by default.
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* {Boolean} editable
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* Set all editable options to true or false
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* {Boolean} editable.updateTime
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* Allow dragging an item to an other moment in time
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* {Boolean} editable.updateGroup
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* Allow dragging an item to an other group
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* {Boolean} editable.add
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* Allow creating new items on double tap
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* {Boolean} editable.remove
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* Allow removing items by clicking the delete button
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* top right of a selected item.
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* {Function(item: Item, callback: Function)} onAdd
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* Callback function triggered when an item is about to be added:
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* when the user double taps an empty space in the Timeline.
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* {Function(item: Item, callback: Function)} onUpdate
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* Callback function fired when an item is about to be updated.
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* This function typically has to show a dialog where the user
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* change the item. If not implemented, nothing happens.
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* {Function(item: Item, callback: Function)} onMove
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* Fired when an item has been moved. If not implemented,
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* the move action will be accepted.
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* {Function(item: Item, callback: Function)} onRemove
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* Fired when an item is about to be deleted.
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* If not implemented, the item will be always removed.
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*/
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ItemSet.prototype.setOptions = function(options) {
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if (options) {
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// copy all options that we know
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var fields = ['type', 'align', 'order', 'stack', 'selectable', 'multiselect', 'groupOrder', 'dataAttributes', 'template','hide', 'snap'];
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util.selectiveExtend(fields, this.options, options);
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if ('orientation' in options) {
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if (typeof options.orientation === 'string') {
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this.options.orientation.item = options.orientation === 'top' ? 'top' : 'bottom';
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}
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else if (typeof options.orientation === 'object' && 'item' in options.orientation) {
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this.options.orientation.item = options.orientation.item;
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}
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}
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if ('margin' in options) {
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if (typeof options.margin === 'number') {
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this.options.margin.axis = options.margin;
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this.options.margin.item.horizontal = options.margin;
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this.options.margin.item.vertical = options.margin;
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}
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else if (typeof options.margin === 'object') {
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util.selectiveExtend(['axis'], this.options.margin, options.margin);
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if ('item' in options.margin) {
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if (typeof options.margin.item === 'number') {
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this.options.margin.item.horizontal = options.margin.item;
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this.options.margin.item.vertical = options.margin.item;
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}
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else if (typeof options.margin.item === 'object') {
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util.selectiveExtend(['horizontal', 'vertical'], this.options.margin.item, options.margin.item);
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}
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}
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}
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}
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if ('editable' in options) {
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if (typeof options.editable === 'boolean') {
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this.options.editable.updateTime = options.editable;
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this.options.editable.updateGroup = options.editable;
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this.options.editable.add = options.editable;
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this.options.editable.remove = options.editable;
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}
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else if (typeof options.editable === 'object') {
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util.selectiveExtend(['updateTime', 'updateGroup', 'add', 'remove'], this.options.editable, options.editable);
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}
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}
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// callback functions
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var addCallback = (function (name) {
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var fn = options[name];
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if (fn) {
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if (!(fn instanceof Function)) {
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throw new Error('option ' + name + ' must be a function ' + name + '(item, callback)');
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}
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this.options[name] = fn;
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}
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}).bind(this);
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['onAdd', 'onUpdate', 'onRemove', 'onMove', 'onMoving'].forEach(addCallback);
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// force the itemSet to refresh: options like orientation and margins may be changed
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this.markDirty();
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}
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};
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/**
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* Mark the ItemSet dirty so it will refresh everything with next redraw.
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* Optionally, all items can be marked as dirty and be refreshed.
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* @param {{refreshItems: boolean}} [options]
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*/
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ItemSet.prototype.markDirty = function(options) {
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this.groupIds = [];
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this.stackDirty = true;
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if (options && options.refreshItems) {
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util.forEach(this.items, function (item) {
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item.dirty = true;
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if (item.displayed) item.redraw();
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});
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}
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};
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/**
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* Destroy the ItemSet
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*/
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ItemSet.prototype.destroy = function() {
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this.hide();
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this.setItems(null);
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this.setGroups(null);
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this.hammer = null;
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this.body = null;
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this.conversion = null;
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};
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/**
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* Hide the component from the DOM
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*/
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ItemSet.prototype.hide = function() {
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// remove the frame containing the items
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if (this.dom.frame.parentNode) {
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this.dom.frame.parentNode.removeChild(this.dom.frame);
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}
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// remove the axis with dots
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if (this.dom.axis.parentNode) {
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this.dom.axis.parentNode.removeChild(this.dom.axis);
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}
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// remove the labelset containing all group labels
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if (this.dom.labelSet.parentNode) {
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this.dom.labelSet.parentNode.removeChild(this.dom.labelSet);
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}
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};
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/**
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* Show the component in the DOM (when not already visible).
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* @return {Boolean} changed
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*/
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ItemSet.prototype.show = function() {
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// show frame containing the items
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if (!this.dom.frame.parentNode) {
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this.body.dom.center.appendChild(this.dom.frame);
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}
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// show axis with dots
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if (!this.dom.axis.parentNode) {
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this.body.dom.backgroundVertical.appendChild(this.dom.axis);
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}
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// show labelset containing labels
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if (!this.dom.labelSet.parentNode) {
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this.body.dom.left.appendChild(this.dom.labelSet);
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}
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};
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/**
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* Set selected items by their id. Replaces the current selection
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* Unknown id's are silently ignored.
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* @param {string[] | string} [ids] An array with zero or more id's of the items to be
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* selected, or a single item id. If ids is undefined
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* or an empty array, all items will be unselected.
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*/
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ItemSet.prototype.setSelection = function(ids) {
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var i, ii, id, item;
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if (ids == undefined) ids = [];
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if (!Array.isArray(ids)) ids = [ids];
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// unselect currently selected items
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for (i = 0, ii = this.selection.length; i < ii; i++) {
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id = this.selection[i];
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item = this.items[id];
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if (item) item.unselect();
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}
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// select items
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this.selection = [];
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for (i = 0, ii = ids.length; i < ii; i++) {
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id = ids[i];
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item = this.items[id];
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if (item) {
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this.selection.push(id);
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item.select();
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}
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}
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};
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/**
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* Get the selected items by their id
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* @return {Array} ids The ids of the selected items
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*/
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ItemSet.prototype.getSelection = function() {
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return this.selection.concat([]);
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};
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/**
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* Get the id's of the currently visible items.
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* @returns {Array} The ids of the visible items
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*/
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ItemSet.prototype.getVisibleItems = function() {
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var range = this.body.range.getRange();
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var left = this.body.util.toScreen(range.start);
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var right = this.body.util.toScreen(range.end);
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var ids = [];
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for (var groupId in this.groups) {
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if (this.groups.hasOwnProperty(groupId)) {
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var group = this.groups[groupId];
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var rawVisibleItems = group.visibleItems;
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// filter the "raw" set with visibleItems into a set which is really
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// visible by pixels
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for (var i = 0; i < rawVisibleItems.length; i++) {
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var item = rawVisibleItems[i];
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// TODO: also check whether visible vertically
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if ((item.left < right) && (item.left + item.width > left)) {
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ids.push(item.id);
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}
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}
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}
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}
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return ids;
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};
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/**
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* Deselect a selected item
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* @param {String | Number} id
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* @private
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*/
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ItemSet.prototype._deselect = function(id) {
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var selection = this.selection;
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for (var i = 0, ii = selection.length; i < ii; i++) {
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if (selection[i] == id) { // non-strict comparison!
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selection.splice(i, 1);
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break;
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}
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}
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};
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|
|
/**
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* Repaint the component
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* @return {boolean} Returns true if the component is resized
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*/
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|
ItemSet.prototype.redraw = function() {
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var margin = this.options.margin,
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range = this.body.range,
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asSize = util.option.asSize,
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options = this.options,
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orientation = options.orientation.item,
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resized = false,
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frame = this.dom.frame,
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editable = options.editable.updateTime || options.editable.updateGroup;
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// recalculate absolute position (before redrawing groups)
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this.props.top = this.body.domProps.top.height + this.body.domProps.border.top;
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this.props.left = this.body.domProps.left.width + this.body.domProps.border.left;
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// update class name
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frame.className = 'vis-itemset' + (editable ? ' vis-editable' : '');
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// reorder the groups (if needed)
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resized = this._orderGroups() || resized;
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// check whether zoomed (in that case we need to re-stack everything)
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// TODO: would be nicer to get this as a trigger from Range
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var visibleInterval = range.end - range.start;
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var zoomed = (visibleInterval != this.lastVisibleInterval) || (this.props.width != this.props.lastWidth);
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if (zoomed) this.stackDirty = true;
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this.lastVisibleInterval = visibleInterval;
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this.props.lastWidth = this.props.width;
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var restack = this.stackDirty;
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var firstGroup = this._firstGroup();
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var firstMargin = {
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|
item: margin.item,
|
|
axis: margin.axis
|
|
};
|
|
var nonFirstMargin = {
|
|
item: margin.item,
|
|
axis: margin.item.vertical / 2
|
|
};
|
|
var height = 0;
|
|
var minHeight = margin.axis + margin.item.vertical;
|
|
|
|
// redraw the background group
|
|
this.groups[BACKGROUND].redraw(range, nonFirstMargin, restack);
|
|
|
|
// redraw all regular groups
|
|
util.forEach(this.groups, function (group) {
|
|
var groupMargin = (group == firstGroup) ? firstMargin : nonFirstMargin;
|
|
var groupResized = group.redraw(range, groupMargin, restack);
|
|
resized = groupResized || resized;
|
|
height += group.height;
|
|
});
|
|
height = Math.max(height, minHeight);
|
|
this.stackDirty = false;
|
|
|
|
// update frame height
|
|
frame.style.height = asSize(height);
|
|
|
|
// calculate actual size
|
|
this.props.width = frame.offsetWidth;
|
|
this.props.height = height;
|
|
|
|
// reposition axis
|
|
this.dom.axis.style.top = asSize((orientation == 'top') ?
|
|
(this.body.domProps.top.height + this.body.domProps.border.top) :
|
|
(this.body.domProps.top.height + this.body.domProps.centerContainer.height));
|
|
this.dom.axis.style.left = '0';
|
|
|
|
// check if this component is resized
|
|
resized = this._isResized() || resized;
|
|
|
|
return resized;
|
|
};
|
|
|
|
/**
|
|
* Get the first group, aligned with the axis
|
|
* @return {Group | null} firstGroup
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._firstGroup = function() {
|
|
var firstGroupIndex = (this.options.orientation.item == 'top') ? 0 : (this.groupIds.length - 1);
|
|
var firstGroupId = this.groupIds[firstGroupIndex];
|
|
var firstGroup = this.groups[firstGroupId] || this.groups[UNGROUPED];
|
|
|
|
return firstGroup || null;
|
|
};
|
|
|
|
/**
|
|
* Create or delete the group holding all ungrouped items. This group is used when
|
|
* there are no groups specified.
|
|
* @protected
|
|
*/
|
|
ItemSet.prototype._updateUngrouped = function() {
|
|
var ungrouped = this.groups[UNGROUPED];
|
|
var background = this.groups[BACKGROUND];
|
|
var item, itemId;
|
|
|
|
if (this.groupsData) {
|
|
// remove the group holding all ungrouped items
|
|
if (ungrouped) {
|
|
ungrouped.hide();
|
|
delete this.groups[UNGROUPED];
|
|
|
|
for (itemId in this.items) {
|
|
if (this.items.hasOwnProperty(itemId)) {
|
|
item = this.items[itemId];
|
|
item.parent && item.parent.remove(item);
|
|
var groupId = this._getGroupId(item.data);
|
|
var group = this.groups[groupId];
|
|
group && group.add(item) || item.hide();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// create a group holding all (unfiltered) items
|
|
if (!ungrouped) {
|
|
var id = null;
|
|
var data = null;
|
|
ungrouped = new Group(id, data, this);
|
|
this.groups[UNGROUPED] = ungrouped;
|
|
|
|
for (itemId in this.items) {
|
|
if (this.items.hasOwnProperty(itemId)) {
|
|
item = this.items[itemId];
|
|
ungrouped.add(item);
|
|
}
|
|
}
|
|
|
|
ungrouped.show();
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get the element for the labelset
|
|
* @return {HTMLElement} labelSet
|
|
*/
|
|
ItemSet.prototype.getLabelSet = function() {
|
|
return this.dom.labelSet;
|
|
};
|
|
|
|
/**
|
|
* Set items
|
|
* @param {vis.DataSet | null} items
|
|
*/
|
|
ItemSet.prototype.setItems = function(items) {
|
|
var me = this,
|
|
ids,
|
|
oldItemsData = this.itemsData;
|
|
|
|
// replace the dataset
|
|
if (!items) {
|
|
this.itemsData = null;
|
|
}
|
|
else if (items instanceof DataSet || items instanceof DataView) {
|
|
this.itemsData = items;
|
|
}
|
|
else {
|
|
throw new TypeError('Data must be an instance of DataSet or DataView');
|
|
}
|
|
|
|
if (oldItemsData) {
|
|
// unsubscribe from old dataset
|
|
util.forEach(this.itemListeners, function (callback, event) {
|
|
oldItemsData.off(event, callback);
|
|
});
|
|
|
|
// remove all drawn items
|
|
ids = oldItemsData.getIds();
|
|
this._onRemove(ids);
|
|
}
|
|
|
|
if (this.itemsData) {
|
|
// subscribe to new dataset
|
|
var id = this.id;
|
|
util.forEach(this.itemListeners, function (callback, event) {
|
|
me.itemsData.on(event, callback, id);
|
|
});
|
|
|
|
// add all new items
|
|
ids = this.itemsData.getIds();
|
|
this._onAdd(ids);
|
|
|
|
// update the group holding all ungrouped items
|
|
this._updateUngrouped();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get the current items
|
|
* @returns {vis.DataSet | null}
|
|
*/
|
|
ItemSet.prototype.getItems = function() {
|
|
return this.itemsData;
|
|
};
|
|
|
|
/**
|
|
* Set groups
|
|
* @param {vis.DataSet} groups
|
|
*/
|
|
ItemSet.prototype.setGroups = function(groups) {
|
|
var me = this,
|
|
ids;
|
|
|
|
// unsubscribe from current dataset
|
|
if (this.groupsData) {
|
|
util.forEach(this.groupListeners, function (callback, event) {
|
|
me.groupsData.off(event, callback);
|
|
});
|
|
|
|
// remove all drawn groups
|
|
ids = this.groupsData.getIds();
|
|
this.groupsData = null;
|
|
this._onRemoveGroups(ids); // note: this will cause a redraw
|
|
}
|
|
|
|
// replace the dataset
|
|
if (!groups) {
|
|
this.groupsData = null;
|
|
}
|
|
else if (groups instanceof DataSet || groups instanceof DataView) {
|
|
this.groupsData = groups;
|
|
}
|
|
else {
|
|
throw new TypeError('Data must be an instance of DataSet or DataView');
|
|
}
|
|
|
|
if (this.groupsData) {
|
|
// subscribe to new dataset
|
|
var id = this.id;
|
|
util.forEach(this.groupListeners, function (callback, event) {
|
|
me.groupsData.on(event, callback, id);
|
|
});
|
|
|
|
// draw all ms
|
|
ids = this.groupsData.getIds();
|
|
this._onAddGroups(ids);
|
|
}
|
|
|
|
// update the group holding all ungrouped items
|
|
this._updateUngrouped();
|
|
|
|
// update the order of all items in each group
|
|
this._order();
|
|
|
|
this.body.emitter.emit('change', {queue: true});
|
|
};
|
|
|
|
/**
|
|
* Get the current groups
|
|
* @returns {vis.DataSet | null} groups
|
|
*/
|
|
ItemSet.prototype.getGroups = function() {
|
|
return this.groupsData;
|
|
};
|
|
|
|
/**
|
|
* Remove an item by its id
|
|
* @param {String | Number} id
|
|
*/
|
|
ItemSet.prototype.removeItem = function(id) {
|
|
var item = this.itemsData.get(id),
|
|
dataset = this.itemsData.getDataSet();
|
|
|
|
if (item) {
|
|
// confirm deletion
|
|
this.options.onRemove(item, function (item) {
|
|
if (item) {
|
|
// remove by id here, it is possible that an item has no id defined
|
|
// itself, so better not delete by the item itself
|
|
dataset.remove(id);
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Get the time of an item based on it's data and options.type
|
|
* @param {Object} itemData
|
|
* @returns {string} Returns the type
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._getType = function (itemData) {
|
|
return itemData.type || this.options.type || (itemData.end ? 'range' : 'box');
|
|
};
|
|
|
|
|
|
/**
|
|
* Get the group id for an item
|
|
* @param {Object} itemData
|
|
* @returns {string} Returns the groupId
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._getGroupId = function (itemData) {
|
|
var type = this._getType(itemData);
|
|
if (type == 'background' && itemData.group == undefined) {
|
|
return BACKGROUND;
|
|
}
|
|
else {
|
|
return this.groupsData ? itemData.group : UNGROUPED;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Handle updated items
|
|
* @param {Number[]} ids
|
|
* @protected
|
|
*/
|
|
ItemSet.prototype._onUpdate = function(ids) {
|
|
var me = this;
|
|
|
|
ids.forEach(function (id) {
|
|
var itemData = me.itemsData.get(id, me.itemOptions);
|
|
var item = me.items[id];
|
|
var type = me._getType(itemData);
|
|
|
|
var constructor = ItemSet.types[type];
|
|
var selected;
|
|
|
|
if (item) {
|
|
// update item
|
|
if (!constructor || !(item instanceof constructor)) {
|
|
// item type has changed, delete the item and recreate it
|
|
selected = item.selected; // preserve selection of this item
|
|
me._removeItem(item);
|
|
item = null;
|
|
}
|
|
else {
|
|
me._updateItem(item, itemData);
|
|
}
|
|
}
|
|
|
|
if (!item) {
|
|
// create item
|
|
if (constructor) {
|
|
item = new constructor(itemData, me.conversion, me.options);
|
|
item.id = id; // TODO: not so nice setting id afterwards
|
|
me._addItem(item);
|
|
if (selected) {
|
|
this.selection.push(id);
|
|
item.select();
|
|
}
|
|
}
|
|
else if (type == 'rangeoverflow') {
|
|
// TODO: deprecated since version 2.1.0 (or 3.0.0?). cleanup some day
|
|
throw new TypeError('Item type "rangeoverflow" is deprecated. Use css styling instead: ' +
|
|
'.vis-item.vis-range .vis-item-content {overflow: visible;}');
|
|
}
|
|
else {
|
|
throw new TypeError('Unknown item type "' + type + '"');
|
|
}
|
|
}
|
|
}.bind(this));
|
|
|
|
this._order();
|
|
this.stackDirty = true; // force re-stacking of all items next redraw
|
|
this.body.emitter.emit('change', {queue: true});
|
|
};
|
|
|
|
/**
|
|
* Handle added items
|
|
* @param {Number[]} ids
|
|
* @protected
|
|
*/
|
|
ItemSet.prototype._onAdd = ItemSet.prototype._onUpdate;
|
|
|
|
/**
|
|
* Handle removed items
|
|
* @param {Number[]} ids
|
|
* @protected
|
|
*/
|
|
ItemSet.prototype._onRemove = function(ids) {
|
|
var count = 0;
|
|
var me = this;
|
|
ids.forEach(function (id) {
|
|
var item = me.items[id];
|
|
if (item) {
|
|
count++;
|
|
me._removeItem(item);
|
|
}
|
|
});
|
|
|
|
if (count) {
|
|
// update order
|
|
this._order();
|
|
this.stackDirty = true; // force re-stacking of all items next redraw
|
|
this.body.emitter.emit('change', {queue: true});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Update the order of item in all groups
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._order = function() {
|
|
// reorder the items in all groups
|
|
// TODO: optimization: only reorder groups affected by the changed items
|
|
util.forEach(this.groups, function (group) {
|
|
group.order();
|
|
});
|
|
};
|
|
|
|
/**
|
|
* Handle updated groups
|
|
* @param {Number[]} ids
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onUpdateGroups = function(ids) {
|
|
this._onAddGroups(ids);
|
|
};
|
|
|
|
/**
|
|
* Handle changed groups (added or updated)
|
|
* @param {Number[]} ids
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onAddGroups = function(ids) {
|
|
var me = this;
|
|
|
|
ids.forEach(function (id) {
|
|
var groupData = me.groupsData.get(id);
|
|
var group = me.groups[id];
|
|
|
|
if (!group) {
|
|
// check for reserved ids
|
|
if (id == UNGROUPED || id == BACKGROUND) {
|
|
throw new Error('Illegal group id. ' + id + ' is a reserved id.');
|
|
}
|
|
|
|
var groupOptions = Object.create(me.options);
|
|
util.extend(groupOptions, {
|
|
height: null
|
|
});
|
|
|
|
group = new Group(id, groupData, me);
|
|
me.groups[id] = group;
|
|
|
|
// add items with this groupId to the new group
|
|
for (var itemId in me.items) {
|
|
if (me.items.hasOwnProperty(itemId)) {
|
|
var item = me.items[itemId];
|
|
if (item.data.group == id) {
|
|
group.add(item);
|
|
}
|
|
}
|
|
}
|
|
|
|
group.order();
|
|
group.show();
|
|
}
|
|
else {
|
|
// update group
|
|
group.setData(groupData);
|
|
}
|
|
});
|
|
|
|
this.body.emitter.emit('change', {queue: true});
|
|
};
|
|
|
|
/**
|
|
* Handle removed groups
|
|
* @param {Number[]} ids
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onRemoveGroups = function(ids) {
|
|
var groups = this.groups;
|
|
ids.forEach(function (id) {
|
|
var group = groups[id];
|
|
|
|
if (group) {
|
|
group.hide();
|
|
delete groups[id];
|
|
}
|
|
});
|
|
|
|
this.markDirty();
|
|
|
|
this.body.emitter.emit('change', {queue: true});
|
|
};
|
|
|
|
/**
|
|
* Reorder the groups if needed
|
|
* @return {boolean} changed
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._orderGroups = function () {
|
|
if (this.groupsData) {
|
|
// reorder the groups
|
|
var groupIds = this.groupsData.getIds({
|
|
order: this.options.groupOrder
|
|
});
|
|
|
|
var changed = !util.equalArray(groupIds, this.groupIds);
|
|
if (changed) {
|
|
// hide all groups, removes them from the DOM
|
|
var groups = this.groups;
|
|
groupIds.forEach(function (groupId) {
|
|
groups[groupId].hide();
|
|
});
|
|
|
|
// show the groups again, attach them to the DOM in correct order
|
|
groupIds.forEach(function (groupId) {
|
|
groups[groupId].show();
|
|
});
|
|
|
|
this.groupIds = groupIds;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
else {
|
|
return false;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Add a new item
|
|
* @param {Item} item
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._addItem = function(item) {
|
|
this.items[item.id] = item;
|
|
|
|
// add to group
|
|
var groupId = this._getGroupId(item.data);
|
|
var group = this.groups[groupId];
|
|
if (group) group.add(item);
|
|
};
|
|
|
|
/**
|
|
* Update an existing item
|
|
* @param {Item} item
|
|
* @param {Object} itemData
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._updateItem = function(item, itemData) {
|
|
var oldGroupId = item.data.group;
|
|
var oldSubGroupId = item.data.subgroup;
|
|
|
|
// update the items data (will redraw the item when displayed)
|
|
item.setData(itemData);
|
|
|
|
// update group
|
|
if (oldGroupId != item.data.group || oldSubGroupId != item.data.subgroup) {
|
|
var oldGroup = this.groups[oldGroupId];
|
|
if (oldGroup) oldGroup.remove(item);
|
|
|
|
var groupId = this._getGroupId(item.data);
|
|
var group = this.groups[groupId];
|
|
if (group) group.add(item);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Delete an item from the ItemSet: remove it from the DOM, from the map
|
|
* with items, and from the map with visible items, and from the selection
|
|
* @param {Item} item
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._removeItem = function(item) {
|
|
// remove from DOM
|
|
item.hide();
|
|
|
|
// remove from items
|
|
delete this.items[item.id];
|
|
|
|
// remove from selection
|
|
var index = this.selection.indexOf(item.id);
|
|
if (index != -1) this.selection.splice(index, 1);
|
|
|
|
// remove from group
|
|
item.parent && item.parent.remove(item);
|
|
};
|
|
|
|
/**
|
|
* Create an array containing all items being a range (having an end date)
|
|
* @param array
|
|
* @returns {Array}
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._constructByEndArray = function(array) {
|
|
var endArray = [];
|
|
|
|
for (var i = 0; i < array.length; i++) {
|
|
if (array[i] instanceof RangeItem) {
|
|
endArray.push(array[i]);
|
|
}
|
|
}
|
|
return endArray;
|
|
};
|
|
|
|
/**
|
|
* Register the clicked item on touch, before dragStart is initiated.
|
|
*
|
|
* dragStart is initiated from a mousemove event, AFTER the mouse/touch is
|
|
* already moving. Therefore, the mouse/touch can sometimes be above an other
|
|
* DOM element than the item itself.
|
|
*
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onTouch = function (event) {
|
|
// store the touched item, used in _onDragStart
|
|
this.touchParams.item = this.itemFromTarget(event);
|
|
this.touchParams.dragLeftItem = event.target.dragLeftItem || false;
|
|
this.touchParams.dragRightItem = event.target.dragRightItem || false;
|
|
this.touchParams.itemProps = null;
|
|
};
|
|
|
|
/**
|
|
* Start dragging the selected events
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDragStart = function (event) {
|
|
if (!this.options.editable.updateTime && !this.options.editable.updateGroup) {
|
|
return;
|
|
}
|
|
|
|
var item = this.touchParams.item || null;
|
|
var me = this;
|
|
var props;
|
|
|
|
if (item && item.selected) {
|
|
var dragLeftItem = this.touchParams.dragLeftItem;
|
|
var dragRightItem = this.touchParams.dragRightItem;
|
|
|
|
if (dragLeftItem) {
|
|
props = {
|
|
item: dragLeftItem,
|
|
initialX: event.center.x,
|
|
dragLeft: true,
|
|
data: util.extend({}, item.data) // clone the items data
|
|
};
|
|
|
|
this.touchParams.itemProps = [props];
|
|
}
|
|
else if (dragRightItem) {
|
|
props = {
|
|
item: dragRightItem,
|
|
initialX: event.center.x,
|
|
dragRight: true,
|
|
data: util.extend({}, item.data) // clone the items data
|
|
};
|
|
|
|
this.touchParams.itemProps = [props];
|
|
}
|
|
else {
|
|
this.touchParams.itemProps = this.getSelection().map(function (id) {
|
|
var item = me.items[id];
|
|
var props = {
|
|
item: item,
|
|
initialX: event.center.x,
|
|
data: util.extend({}, item.data) // clone the items data
|
|
};
|
|
|
|
return props;
|
|
});
|
|
}
|
|
|
|
event.stopPropagation();
|
|
}
|
|
else if (this.options.editable.add && (event.srcEvent.ctrlKey || event.srcEvent.metaKey)) {
|
|
// create a new range item when dragging with ctrl key down
|
|
this._onDragStartAddItem(event);
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Start creating a new range item by dragging.
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDragStartAddItem = function (event) {
|
|
var snap = this.options.snap || null;
|
|
var xAbs = util.getAbsoluteLeft(this.dom.frame);
|
|
var x = event.center.x - xAbs - 10; // minus 10 to compensate for the drag starting as soon as you've moved 10px
|
|
var time = this.body.util.toTime(x);
|
|
var scale = this.body.util.getScale();
|
|
var step = this.body.util.getStep();
|
|
var start = snap ? snap(time, scale, step) : start;
|
|
var end = start;
|
|
|
|
var itemData = {
|
|
type: 'range',
|
|
start: start,
|
|
end: end,
|
|
content: 'new item'
|
|
};
|
|
|
|
var id = util.randomUUID();
|
|
itemData[this.itemsData._fieldId] = id;
|
|
|
|
var group = this.groupFromTarget(event);
|
|
if (group) {
|
|
itemData.group = group.groupId;
|
|
}
|
|
|
|
var newItem = new RangeItem(itemData, this.conversion, this.options);
|
|
newItem.id = id; // TODO: not so nice setting id afterwards
|
|
newItem.data = itemData;
|
|
this._addItem(newItem);
|
|
|
|
var props = {
|
|
item: newItem,
|
|
dragRight: true,
|
|
initialX: event.center.x,
|
|
data: util.extend({}, itemData)
|
|
};
|
|
this.touchParams.itemProps = [props];
|
|
|
|
event.stopPropagation();
|
|
};
|
|
|
|
/**
|
|
* Drag selected items
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDrag = function (event) {
|
|
if (this.touchParams.itemProps) {
|
|
event.stopPropagation();
|
|
|
|
var me = this;
|
|
var snap = this.options.snap || null;
|
|
var xOffset = this.body.dom.root.offsetLeft + this.body.domProps.left.width;
|
|
var scale = this.body.util.getScale();
|
|
var step = this.body.util.getStep();
|
|
|
|
// move
|
|
this.touchParams.itemProps.forEach(function (props) {
|
|
var newProps = {};
|
|
var current = me.body.util.toTime(event.center.x - xOffset);
|
|
var initial = me.body.util.toTime(props.initialX - xOffset);
|
|
var offset = current - initial;
|
|
|
|
var itemData = util.extend({}, props.item.data); // clone the data
|
|
|
|
if (me.options.editable.updateTime) {
|
|
if (props.dragLeft) {
|
|
// drag left side of a range item
|
|
if (itemData.start != undefined) {
|
|
var initialStart = util.convert(props.data.start, 'Date');
|
|
var start = new Date(initialStart.valueOf() + offset);
|
|
itemData.start = snap ? snap(start, scale, step) : start;
|
|
}
|
|
}
|
|
else if (props.dragRight) {
|
|
// drag right side of a range item
|
|
if (itemData.end != undefined) {
|
|
var initialEnd = util.convert(props.data.end, 'Date');
|
|
var end = new Date(initialEnd.valueOf() + offset);
|
|
itemData.end = snap ? snap(end, scale, step) : end;
|
|
}
|
|
}
|
|
else {
|
|
// drag both start and end
|
|
if (itemData.start != undefined) {
|
|
var initialStart = util.convert(props.data.start, 'Date').valueOf();
|
|
var start = new Date(initialStart + offset);
|
|
|
|
if (itemData.end != undefined) {
|
|
var initialEnd = util.convert(props.data.end, 'Date');
|
|
var duration = initialEnd.valueOf() - initialStart.valueOf();
|
|
|
|
itemData.start = snap ? snap(start, scale, step) : start;
|
|
itemData.end = new Date(itemData.start.valueOf() + duration);
|
|
}
|
|
else {
|
|
itemData.start = snap ? snap(start, scale, step) : start;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (me.options.editable.updateGroup && (!props.dragLeft && !props.dragRight)) {
|
|
if (itemData.group != undefined) {
|
|
// drag from one group to another
|
|
var group = me.groupFromTarget(event);
|
|
if (group) {
|
|
itemData.group = group.groupId;
|
|
}
|
|
}
|
|
}
|
|
|
|
// confirm moving the item
|
|
me.options.onMoving(itemData, function (itemData) {
|
|
if (itemData) {
|
|
props.item.setData(itemData);
|
|
}
|
|
});
|
|
});
|
|
|
|
this.stackDirty = true; // force re-stacking of all items next redraw
|
|
this.body.emitter.emit('change');
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Move an item to another group
|
|
* @param {Item} item
|
|
* @param {String | Number} groupId
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._moveToGroup = function(item, groupId) {
|
|
var group = this.groups[groupId];
|
|
if (group && group.groupId != item.data.group) {
|
|
var oldGroup = item.parent;
|
|
oldGroup.remove(item);
|
|
oldGroup.order();
|
|
group.add(item);
|
|
group.order();
|
|
|
|
item.data.group = group.groupId;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* End of dragging selected items
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onDragEnd = function (event) {
|
|
if (this.touchParams.itemProps) {
|
|
event.stopPropagation();
|
|
|
|
// prepare a change set for the changed items
|
|
var changes = [];
|
|
var me = this;
|
|
var dataset = this.itemsData.getDataSet();
|
|
|
|
var itemProps = this.touchParams.itemProps ;
|
|
this.touchParams.itemProps = null;
|
|
itemProps.forEach(function (props) {
|
|
var id = props.item.id;
|
|
var exists = me.itemsData.get(id, me.itemOptions) != null;
|
|
|
|
if (!exists) {
|
|
// add a new item
|
|
me.options.onAdd(props.item.data, function (itemData) {
|
|
me._removeItem(props.item); // remove temporary item
|
|
if (itemData) {
|
|
me.itemsData.getDataSet().add(itemData);
|
|
}
|
|
|
|
// force re-stacking of all items next redraw
|
|
me.stackDirty = true;
|
|
me.body.emitter.emit('change');
|
|
});
|
|
}
|
|
else {
|
|
// update existing item
|
|
var itemData = util.extend({}, props.item.data); // clone the data
|
|
me.options.onMove(itemData, function (itemData) {
|
|
if (itemData) {
|
|
// apply changes
|
|
itemData[dataset._fieldId] = id; // ensure the item contains its id (can be undefined)
|
|
changes.push(itemData);
|
|
}
|
|
else {
|
|
// restore original values
|
|
props.item.setData(props.data);
|
|
|
|
me.stackDirty = true; // force re-stacking of all items next redraw
|
|
me.body.emitter.emit('change');
|
|
}
|
|
});
|
|
}
|
|
});
|
|
|
|
// apply the changes to the data (if there are changes)
|
|
if (changes.length) {
|
|
dataset.update(changes);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Handle selecting/deselecting an item when tapping it
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onSelectItem = function (event) {
|
|
if (!this.options.selectable) return;
|
|
|
|
var ctrlKey = event.srcEvent && (event.srcEvent.ctrlKey || event.srcEvent.metaKey);
|
|
var shiftKey = event.srcEvent && event.srcEvent.shiftKey;
|
|
if (ctrlKey || shiftKey) {
|
|
this._onMultiSelectItem(event);
|
|
return;
|
|
}
|
|
|
|
var oldSelection = this.getSelection();
|
|
|
|
var item = this.itemFromTarget(event);
|
|
var selection = item ? [item.id] : [];
|
|
this.setSelection(selection);
|
|
|
|
var newSelection = this.getSelection();
|
|
|
|
// emit a select event,
|
|
// except when old selection is empty and new selection is still empty
|
|
if (newSelection.length > 0 || oldSelection.length > 0) {
|
|
this.body.emitter.emit('select', {
|
|
items: newSelection,
|
|
event: event
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Handle creation and updates of an item on double tap
|
|
* @param event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onAddItem = function (event) {
|
|
if (!this.options.selectable) return;
|
|
if (!this.options.editable.add) return;
|
|
|
|
var me = this;
|
|
var snap = this.options.snap || null;
|
|
var item = this.itemFromTarget(event);
|
|
|
|
event.stopPropagation();
|
|
|
|
if (item) {
|
|
// update item
|
|
|
|
// execute async handler to update the item (or cancel it)
|
|
var itemData = me.itemsData.get(item.id); // get a clone of the data from the dataset
|
|
this.options.onUpdate(itemData, function (itemData) {
|
|
if (itemData) {
|
|
me.itemsData.getDataSet().update(itemData);
|
|
}
|
|
});
|
|
}
|
|
else {
|
|
// add item
|
|
var xAbs = util.getAbsoluteLeft(this.dom.frame);
|
|
var x = event.center.x - xAbs;
|
|
var start = this.body.util.toTime(x);
|
|
var scale = this.body.util.getScale();
|
|
var step = this.body.util.getStep();
|
|
|
|
var newItem = {
|
|
start: snap ? snap(start, scale, step) : start,
|
|
content: 'new item'
|
|
};
|
|
|
|
// when default type is a range, add a default end date to the new item
|
|
if (this.options.type === 'range') {
|
|
var end = this.body.util.toTime(x + this.props.width / 5);
|
|
newItem.end = snap ? snap(end, scale, step) : end;
|
|
}
|
|
|
|
newItem[this.itemsData._fieldId] = util.randomUUID();
|
|
|
|
var group = this.groupFromTarget(event);
|
|
if (group) {
|
|
newItem.group = group.groupId;
|
|
}
|
|
|
|
// execute async handler to customize (or cancel) adding an item
|
|
this.options.onAdd(newItem, function (item) {
|
|
if (item) {
|
|
me.itemsData.getDataSet().add(item);
|
|
// TODO: need to trigger a redraw?
|
|
}
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Handle selecting/deselecting multiple items when holding an item
|
|
* @param {Event} event
|
|
* @private
|
|
*/
|
|
ItemSet.prototype._onMultiSelectItem = function (event) {
|
|
if (!this.options.selectable) return;
|
|
|
|
var item = this.itemFromTarget(event);
|
|
|
|
if (item) {
|
|
// multi select items (if allowed)
|
|
|
|
var selection = this.options.multiselect
|
|
? this.getSelection() // take current selection
|
|
: []; // deselect current selection
|
|
|
|
var shiftKey = event.srcEvent && event.srcEvent.shiftKey || false;
|
|
|
|
if (shiftKey && this.options.multiselect) {
|
|
// select all items between the old selection and the tapped item
|
|
|
|
// determine the selection range
|
|
selection.push(item.id);
|
|
var range = ItemSet._getItemRange(this.itemsData.get(selection, this.itemOptions));
|
|
|
|
// select all items within the selection range
|
|
selection = [];
|
|
for (var id in this.items) {
|
|
if (this.items.hasOwnProperty(id)) {
|
|
var _item = this.items[id];
|
|
var start = _item.data.start;
|
|
var end = (_item.data.end !== undefined) ? _item.data.end : start;
|
|
|
|
if (start >= range.min &&
|
|
end <= range.max &&
|
|
!(_item instanceof BackgroundItem)) {
|
|
selection.push(_item.id); // do not use id but item.id, id itself is stringified
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
// add/remove this item from the current selection
|
|
var index = selection.indexOf(item.id);
|
|
if (index == -1) {
|
|
// item is not yet selected -> select it
|
|
selection.push(item.id);
|
|
}
|
|
else {
|
|
// item is already selected -> deselect it
|
|
selection.splice(index, 1);
|
|
}
|
|
}
|
|
|
|
this.setSelection(selection);
|
|
|
|
this.body.emitter.emit('select', {
|
|
items: this.getSelection(),
|
|
event: event
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Calculate the time range of a list of items
|
|
* @param {Array.<Object>} itemsData
|
|
* @return {{min: Date, max: Date}} Returns the range of the provided items
|
|
* @private
|
|
*/
|
|
ItemSet._getItemRange = function(itemsData) {
|
|
var max = null;
|
|
var min = null;
|
|
|
|
itemsData.forEach(function (data) {
|
|
if (min == null || data.start < min) {
|
|
min = data.start;
|
|
}
|
|
|
|
if (data.end != undefined) {
|
|
if (max == null || data.end > max) {
|
|
max = data.end;
|
|
}
|
|
}
|
|
else {
|
|
if (max == null || data.start > max) {
|
|
max = data.start;
|
|
}
|
|
}
|
|
});
|
|
|
|
return {
|
|
min: min,
|
|
max: max
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Find an item from an event target:
|
|
* searches for the attribute 'timeline-item' in the event target's element tree
|
|
* @param {Event} event
|
|
* @return {Item | null} item
|
|
*/
|
|
ItemSet.prototype.itemFromTarget = function(event) {
|
|
var target = event.target;
|
|
while (target) {
|
|
if (target.hasOwnProperty('timeline-item')) {
|
|
return target['timeline-item'];
|
|
}
|
|
target = target.parentNode;
|
|
}
|
|
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Find the Group from an event target:
|
|
* searches for the attribute 'timeline-group' in the event target's element tree
|
|
* @param {Event} event
|
|
* @return {Group | null} group
|
|
*/
|
|
ItemSet.prototype.groupFromTarget = function(event) {
|
|
var clientY = event.center ? event.center.y : event.clientY;
|
|
for (var i = 0; i < this.groupIds.length; i++) {
|
|
var groupId = this.groupIds[i];
|
|
var group = this.groups[groupId];
|
|
var foreground = group.dom.foreground;
|
|
var top = util.getAbsoluteTop(foreground);
|
|
if (clientY > top && clientY < top + foreground.offsetHeight) {
|
|
return group;
|
|
}
|
|
|
|
if (this.options.orientation.item === 'top') {
|
|
if (i === this.groupIds.length - 1 && clientY > top) {
|
|
return group;
|
|
}
|
|
}
|
|
else {
|
|
if (i === 0 && clientY < top + foreground.offset) {
|
|
return group;
|
|
}
|
|
}
|
|
}
|
|
|
|
return null;
|
|
};
|
|
|
|
/**
|
|
* Find the ItemSet from an event target:
|
|
* searches for the attribute 'timeline-itemset' in the event target's element tree
|
|
* @param {Event} event
|
|
* @return {ItemSet | null} item
|
|
*/
|
|
ItemSet.itemSetFromTarget = function(event) {
|
|
var target = event.target;
|
|
while (target) {
|
|
if (target.hasOwnProperty('timeline-itemset')) {
|
|
return target['timeline-itemset'];
|
|
}
|
|
target = target.parentNode;
|
|
}
|
|
|
|
return null;
|
|
};
|
|
|
|
module.exports = ItemSet;
|