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243 lines
6.5 KiB
243 lines
6.5 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 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, groups, options) {
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// if the third element is options, the forth is groups (optionally);
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if (!(groups instanceof Array || groups instanceof vis.DataSet) && groups instanceof Object) {
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var forthArgument = options;
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options = groups;
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groups = forthArgument;
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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.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) {
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if (this.options.start != undefined || this.options.end != undefined) {
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var start = this.options.start != undefined ? this.options.start : null;
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var end = this.options.end != undefined ? this.options.end : null;
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this.setWindow(start, end, {animate: false});
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}
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else {
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this.fit({animate: false});
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}
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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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