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282 lines
7.5 KiB
282 lines
7.5 KiB
var Emitter = require('emitter-component');
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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 Range = require('./Range');
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var Core = require('./Core');
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var TimeAxis = require('./component/TimeAxis');
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var CurrentTime = require('./component/CurrentTime');
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var CustomTime = require('./component/CustomTime');
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var ItemSet = require('./component/ItemSet');
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/**
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* Create a timeline visualization
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* @param {HTMLElement} container
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* @param {vis.DataSet | Array | google.visualization.DataTable} [items]
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* @param {Object} [options] See Timeline.setOptions for the available options.
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* @constructor
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* @extends Core
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*/
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function Timeline (container, items, options) {
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if (!(this instanceof Timeline)) {
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throw new SyntaxError('Constructor must be called with the new operator');
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}
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var me = this;
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this.defaultOptions = {
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start: null,
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end: null,
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autoResize: true,
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orientation: 'bottom',
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width: null,
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height: null,
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maxHeight: null,
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minHeight: null
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};
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this.options = util.deepExtend({}, this.defaultOptions);
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// Create the DOM, props, and emitter
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this._create(container);
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// all components listed here will be repainted automatically
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this.components = [];
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this.body = {
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dom: this.dom,
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domProps: this.props,
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emitter: {
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on: this.on.bind(this),
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off: this.off.bind(this),
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emit: this.emit.bind(this)
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},
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util: {
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snap: null, // will be specified after TimeAxis is created
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toScreen: me._toScreen.bind(me),
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toGlobalScreen: me._toGlobalScreen.bind(me), // this refers to the root.width
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toTime: me._toTime.bind(me),
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toGlobalTime : me._toGlobalTime.bind(me)
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}
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};
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// range
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this.range = new Range(this.body);
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this.components.push(this.range);
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this.body.range = this.range;
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// time axis
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this.timeAxis = new TimeAxis(this.body);
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this.components.push(this.timeAxis);
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this.body.util.snap = this.timeAxis.snap.bind(this.timeAxis);
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// current time bar
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this.currentTime = new CurrentTime(this.body);
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this.components.push(this.currentTime);
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// custom time bar
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// Note: time bar will be attached in this.setOptions when selected
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this.customTime = new CustomTime(this.body);
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this.components.push(this.customTime);
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// item set
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this.itemSet = new ItemSet(this.body);
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this.components.push(this.itemSet);
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this.itemsData = null; // DataSet
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this.groupsData = null; // DataSet
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// apply options
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if (options) {
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this.setOptions(options);
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}
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// create itemset
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if (items) {
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this.setItems(items);
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}
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else {
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this.redraw();
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}
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}
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// Extend the functionality from Core
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Timeline.prototype = new Core();
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/**
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* Set items
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* @param {vis.DataSet | Array | google.visualization.DataTable | null} items
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*/
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Timeline.prototype.setItems = function(items) {
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var initialLoad = (this.itemsData == null);
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// convert to type DataSet when needed
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var newDataSet;
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if (!items) {
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newDataSet = null;
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}
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else if (items instanceof DataSet || items instanceof DataView) {
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newDataSet = items;
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}
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else {
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// turn an array into a dataset
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newDataSet = new DataSet(items, {
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type: {
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start: 'Date',
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end: 'Date'
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}
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});
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}
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// set items
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this.itemsData = newDataSet;
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this.itemSet && this.itemSet.setItems(newDataSet);
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if (initialLoad && ('start' in this.options || 'end' in this.options)) {
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this.fit();
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var start = ('start' in this.options) ? util.convert(this.options.start, 'Date') : null;
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var end = ('end' in this.options) ? util.convert(this.options.end, 'Date') : null;
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this.setWindow(start, end);
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}
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};
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/**
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* Set groups
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* @param {vis.DataSet | Array | google.visualization.DataTable} groups
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*/
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Timeline.prototype.setGroups = function(groups) {
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// convert to type DataSet when needed
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var newDataSet;
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if (!groups) {
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newDataSet = null;
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}
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else if (groups instanceof DataSet || groups instanceof DataView) {
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newDataSet = groups;
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}
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else {
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// turn an array into a dataset
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newDataSet = new DataSet(groups);
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}
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this.groupsData = newDataSet;
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this.itemSet.setGroups(newDataSet);
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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 {Array} [ids] An array with zero or more id's of the items to be
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* selected. If ids is an empty array, all items will be
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* unselected.
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* @param {Object} [options] Available options:
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* `focus: boolean` If true, focus will be set
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* to the selected item(s)
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*/
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Timeline.prototype.setSelection = function(ids, options) {
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this.itemSet && this.itemSet.setSelection(ids);
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if (ids && options) {
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if (options.focus) {
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this.focus(ids);
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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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Timeline.prototype.getSelection = function() {
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return this.itemSet && this.itemSet.getSelection() || [];
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};
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/**
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* Adjust the visible window such that the selected item (or multiple items)
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* are centered on screen.
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* @param {String | String[]} id An item id or array with item ids
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*/
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Timeline.prototype.focus = function(id) {
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if (!this.itemsData) return;
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// get the specified item(s)
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var itemsData = this.itemsData.getDataSet().get(id, {
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type: {
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start: 'Date',
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end: 'Date'
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}
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});
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// turn into an array in case of a single item
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if (!Array.isArray(itemsData)) {
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itemsData = [itemsData];
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}
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// calculate minimum start and maximum end of specified items
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var start = null;
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var end = null;
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itemsData.forEach(function (itemData) {
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var s = itemData.start.valueOf();
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var e = 'end' in itemData ? itemData.end.valueOf() :itemData.start.valueOf();
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if (start === null || s < start) {
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start = s;
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}
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if (end === null || e > end) {
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end = e;
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}
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});
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// calculate the new middle and interval for the window
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var middle = (start + end) / 2;
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var interval = Math.max((this.range.end - this.range.start), (end - start) * 1.1);
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this.range.setRange(middle - interval / 2, middle + interval / 2);
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};
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/**
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* Get the data range of the item set.
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* @returns {{min: Date, max: Date}} range A range with a start and end Date.
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* When no minimum is found, min==null
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* When no maximum is found, max==null
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*/
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Timeline.prototype.getItemRange = function() {
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// calculate min from start filed
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var dataset = this.itemsData.getDataSet(),
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min = null,
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max = null;
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if (dataset) {
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// calculate the minimum value of the field 'start'
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var minItem = dataset.min('start');
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min = minItem ? util.convert(minItem.start, 'Date').valueOf() : null;
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// Note: we convert first to Date and then to number because else
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// a conversion from ISODate to Number will fail
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// calculate maximum value of fields 'start' and 'end'
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var maxStartItem = dataset.max('start');
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if (maxStartItem) {
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max = util.convert(maxStartItem.start, 'Date').valueOf();
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}
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var maxEndItem = dataset.max('end');
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if (maxEndItem) {
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if (max == null) {
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max = util.convert(maxEndItem.end, 'Date').valueOf();
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}
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else {
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max = Math.max(max, util.convert(maxEndItem.end, 'Date').valueOf());
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}
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}
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}
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return {
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min: (min != null) ? new Date(min) : null,
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max: (max != null) ? new Date(max) : null
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};
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};
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module.exports = Timeline;
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