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233 lines
6.2 KiB
233 lines
6.2 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 LineGraph = require('./component/LineGraph');
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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 Graph2d.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 Graph2d (container, items, options, groups) {
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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.linegraph = new LineGraph(this.body);
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this.components.push(this.linegraph);
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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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// IMPORTANT: THIS HAPPENS BEFORE SET ITEMS!
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if (groups) {
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this.setGroups(groups);
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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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Graph2d.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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Graph2d.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.linegraph && this.linegraph.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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Graph2d.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.linegraph.setGroups(newDataSet);
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};
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/**
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* Returns an object containing an SVG element with the icon of the group (size determined by iconWidth and iconHeight), the label of the group (content) and the yAxisOrientation of the group (left or right).
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* @param groupId
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* @param width
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* @param height
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*/
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Graph2d.prototype.getLegend = function(groupId, width, height) {
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if (width === undefined) {width = 15;}
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if (height === undefined) {height = 15;}
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if (this.linegraph.groups[groupId] !== undefined) {
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return this.linegraph.groups[groupId].getLegend(width,height);
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}
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else {
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return "cannot find group:" + groupId;
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}
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}
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/**
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* This checks if the visible option of the supplied group (by ID) is true or false.
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* @param groupId
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* @returns {*}
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*/
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Graph2d.prototype.isGroupVisible = function(groupId) {
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if (this.linegraph.groups[groupId] !== undefined) {
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return (this.linegraph.groups[groupId].visible && (this.linegraph.options.groups.visibility[groupId] === undefined || this.linegraph.options.groups.visibility[groupId] == true));
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}
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else {
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return false;
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}
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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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Graph2d.prototype.getItemRange = function() {
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var min = null;
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var max = null;
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// calculate min from start filed
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for (var groupId in this.linegraph.groups) {
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if (this.linegraph.groups.hasOwnProperty(groupId)) {
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if (this.linegraph.groups[groupId].visible == true) {
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for (var i = 0; i < this.linegraph.groups[groupId].itemsData.length; i++) {
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var item = this.linegraph.groups[groupId].itemsData[i];
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var value = util.convert(item.x, 'Date').valueOf();
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min = min == null ? value : min > value ? value : min;
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max = max == null ? value : max < value ? value : max;
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}
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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 = Graph2d;
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