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985 lines
30 KiB
985 lines
30 KiB
var util = require('../../util');
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var DOMutil = require('../../DOMutil');
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var DataSet = require('../../DataSet');
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var DataView = require('../../DataView');
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var Component = require('./Component');
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var DataAxis = require('./DataAxis');
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var GraphGroup = require('./GraphGroup');
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var Legend = require('./Legend');
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var BarGraphFunctions = require('./graph2d_types/bar');
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var UNGROUPED = '__ungrouped__'; // reserved group id for ungrouped items
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/**
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* This is the constructor of the LineGraph. It requires a Timeline body and options.
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*
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* @param body
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* @param options
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* @constructor
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*/
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function LineGraph(body, options) {
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this.id = util.randomUUID();
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this.body = body;
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this.defaultOptions = {
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yAxisOrientation: 'left',
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defaultGroup: 'default',
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sort: true,
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sampling: true,
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graphHeight: '400px',
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shaded: {
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enabled: false,
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orientation: 'bottom' // top, bottom
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},
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style: 'line', // line, bar
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barChart: {
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width: 50,
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handleOverlap: 'overlap',
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align: 'center' // left, center, right
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},
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catmullRom: {
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enabled: true,
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parametrization: 'centripetal', // uniform (alpha = 0.0), chordal (alpha = 1.0), centripetal (alpha = 0.5)
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alpha: 0.5
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},
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drawPoints: {
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enabled: true,
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size: 6,
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style: 'square' // square, circle
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},
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dataAxis: {
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showMinorLabels: true,
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showMajorLabels: true,
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icons: false,
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width: '40px',
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visible: true,
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alignZeros: true,
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customRange: {
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left: {min:undefined, max:undefined},
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right: {min:undefined, max:undefined}
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}
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//, these options are not set by default, but this shows the format they will be in
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//format: {
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// left: {decimals: 2},
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// right: {decimals: 2}
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//},
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//title: {
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// left: {
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// text: 'left',
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// style: 'color:black;'
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// },
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// right: {
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// text: 'right',
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// style: 'color:black;'
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// }
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//}
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},
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legend: {
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enabled: false,
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icons: true,
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left: {
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visible: true,
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position: 'top-left' // top/bottom - left,right
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},
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right: {
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visible: true,
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position: 'top-right' // top/bottom - left,right
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}
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},
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groups: {
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visibility: {}
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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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this.dom = {};
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this.props = {};
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this.hammer = null;
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this.groups = {};
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this.abortedGraphUpdate = false;
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this.autoSizeSVG = false;
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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.selection = []; // list with the ids of all selected nodes
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this.lastStart = this.body.range.start;
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this.touchParams = {}; // stores properties while dragging
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this.svgElements = {};
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this.setOptions(options);
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this.groupsUsingDefaultStyles = [0];
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this.COUNTER = 0;
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this.body.emitter.on('rangechanged', function() {
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me.lastStart = me.body.range.start;
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me.svg.style.left = util.option.asSize(-me.width);
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me.redraw.call(me,true);
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});
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// create the HTML DOM
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this._create();
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this.framework = {svg: this.svg, svgElements: this.svgElements, options: this.options, groups: this.groups};
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this.body.emitter.emit('change');
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}
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LineGraph.prototype = new Component();
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/**
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* Create the HTML DOM for the ItemSet
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*/
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LineGraph.prototype._create = function(){
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var frame = document.createElement('div');
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frame.className = 'LineGraph';
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this.dom.frame = frame;
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// create svg element for graph drawing.
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this.svg = document.createElementNS('http://www.w3.org/2000/svg','svg');
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this.svg.style.position = 'relative';
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this.svg.style.height = ('' + this.options.graphHeight).replace('px','') + 'px';
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this.svg.style.display = 'block';
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frame.appendChild(this.svg);
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// data axis
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this.options.dataAxis.orientation = 'left';
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this.yAxisLeft = new DataAxis(this.body, this.options.dataAxis, this.svg, this.options.groups);
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this.options.dataAxis.orientation = 'right';
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this.yAxisRight = new DataAxis(this.body, this.options.dataAxis, this.svg, this.options.groups);
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delete this.options.dataAxis.orientation;
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// legends
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this.legendLeft = new Legend(this.body, this.options.legend, 'left', this.options.groups);
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this.legendRight = new Legend(this.body, this.options.legend, 'right', this.options.groups);
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this.show();
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};
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/**
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* set the options of the LineGraph. the mergeOptions is used for subObjects that have an enabled element.
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* @param {object} options
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*/
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LineGraph.prototype.setOptions = function(options) {
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if (options) {
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var fields = ['sampling','defaultGroup','graphHeight','yAxisOrientation','style','barChart','dataAxis','sort','groups'];
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if (options.graphHeight === undefined && options.height !== undefined && this.body.domProps.centerContainer.height !== undefined) {
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this.autoSizeSVG = true;
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}
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else if (this.body.domProps.centerContainer.height !== undefined && options.graphHeight !== undefined) {
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if (parseInt((options.graphHeight + '').replace("px",'')) < this.body.domProps.centerContainer.height) {
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this.autoSizeSVG = true;
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}
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}
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util.selectiveDeepExtend(fields, this.options, options);
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util.mergeOptions(this.options, options,'catmullRom');
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util.mergeOptions(this.options, options,'drawPoints');
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util.mergeOptions(this.options, options,'shaded');
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util.mergeOptions(this.options, options,'legend');
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if (options.catmullRom) {
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if (typeof options.catmullRom == 'object') {
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if (options.catmullRom.parametrization) {
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if (options.catmullRom.parametrization == 'uniform') {
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this.options.catmullRom.alpha = 0;
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}
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else if (options.catmullRom.parametrization == 'chordal') {
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this.options.catmullRom.alpha = 1.0;
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}
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else {
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this.options.catmullRom.parametrization = 'centripetal';
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this.options.catmullRom.alpha = 0.5;
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}
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}
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}
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}
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if (this.yAxisLeft) {
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if (options.dataAxis !== undefined) {
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this.yAxisLeft.setOptions(this.options.dataAxis);
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this.yAxisRight.setOptions(this.options.dataAxis);
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}
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}
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if (this.legendLeft) {
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if (options.legend !== undefined) {
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this.legendLeft.setOptions(this.options.legend);
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this.legendRight.setOptions(this.options.legend);
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}
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}
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if (this.groups.hasOwnProperty(UNGROUPED)) {
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this.groups[UNGROUPED].setOptions(options);
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}
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}
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// this is used to redraw the graph if the visibility of the groups is changed.
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if (this.dom.frame) {
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this.redraw(true);
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}
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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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LineGraph.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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};
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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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LineGraph.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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};
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/**
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* Set items
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* @param {vis.DataSet | null} items
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*/
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LineGraph.prototype.setItems = function(items) {
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var me = this,
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ids,
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oldItemsData = this.itemsData;
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// replace the dataset
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if (!items) {
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this.itemsData = null;
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}
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else if (items instanceof DataSet || items instanceof DataView) {
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this.itemsData = items;
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}
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else {
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throw new TypeError('Data must be an instance of DataSet or DataView');
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}
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if (oldItemsData) {
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// unsubscribe from old dataset
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util.forEach(this.itemListeners, function (callback, event) {
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oldItemsData.off(event, callback);
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});
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// remove all drawn items
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ids = oldItemsData.getIds();
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this._onRemove(ids);
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}
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if (this.itemsData) {
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// subscribe to new dataset
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var id = this.id;
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util.forEach(this.itemListeners, function (callback, event) {
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me.itemsData.on(event, callback, id);
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});
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// add all new items
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ids = this.itemsData.getIds();
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this._onAdd(ids);
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}
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this._updateUngrouped();
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//this._updateGraph();
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this.redraw(true);
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};
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/**
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* Set groups
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* @param {vis.DataSet} groups
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*/
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LineGraph.prototype.setGroups = function(groups) {
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var me = this;
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var ids;
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// unsubscribe from current dataset
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if (this.groupsData) {
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util.forEach(this.groupListeners, function (callback, event) {
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me.groupsData.unsubscribe(event, callback);
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});
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// remove all drawn groups
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ids = this.groupsData.getIds();
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this.groupsData = null;
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this._onRemoveGroups(ids); // note: this will cause a redraw
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}
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// replace the dataset
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if (!groups) {
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this.groupsData = null;
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}
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else if (groups instanceof DataSet || groups instanceof DataView) {
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this.groupsData = groups;
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}
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else {
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throw new TypeError('Data must be an instance of DataSet or DataView');
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}
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if (this.groupsData) {
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// subscribe to new dataset
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var id = this.id;
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util.forEach(this.groupListeners, function (callback, event) {
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me.groupsData.on(event, callback, id);
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});
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// draw all ms
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ids = this.groupsData.getIds();
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this._onAddGroups(ids);
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}
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this._onUpdate();
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};
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/**
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* Update the data
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* @param [ids]
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* @private
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*/
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LineGraph.prototype._onUpdate = function(ids) {
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this._updateUngrouped();
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this._updateAllGroupData();
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//this._updateGraph();
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this.redraw(true);
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};
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LineGraph.prototype._onAdd = function (ids) {this._onUpdate(ids);};
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LineGraph.prototype._onRemove = function (ids) {this._onUpdate(ids);};
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LineGraph.prototype._onUpdateGroups = function (groupIds) {
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for (var i = 0; i < groupIds.length; i++) {
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var group = this.groupsData.get(groupIds[i]);
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this._updateGroup(group, groupIds[i]);
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}
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//this._updateGraph();
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this.redraw(true);
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};
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LineGraph.prototype._onAddGroups = function (groupIds) {this._onUpdateGroups(groupIds);};
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/**
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* this cleans the group out off the legends and the dataaxis, updates the ungrouped and updates the graph
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* @param {Array} groupIds
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* @private
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*/
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LineGraph.prototype._onRemoveGroups = function (groupIds) {
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for (var i = 0; i < groupIds.length; i++) {
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if (this.groups.hasOwnProperty(groupIds[i])) {
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if (this.groups[groupIds[i]].options.yAxisOrientation == 'right') {
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this.yAxisRight.removeGroup(groupIds[i]);
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this.legendRight.removeGroup(groupIds[i]);
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this.legendRight.redraw();
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}
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else {
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this.yAxisLeft.removeGroup(groupIds[i]);
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this.legendLeft.removeGroup(groupIds[i]);
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this.legendLeft.redraw();
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}
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delete this.groups[groupIds[i]];
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}
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}
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this._updateUngrouped();
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//this._updateGraph();
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this.redraw(true);
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};
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/**
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* update a group object with the group dataset entree
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*
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* @param group
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* @param groupId
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* @private
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*/
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LineGraph.prototype._updateGroup = function (group, groupId) {
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if (!this.groups.hasOwnProperty(groupId)) {
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this.groups[groupId] = new GraphGroup(group, groupId, this.options, this.groupsUsingDefaultStyles);
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if (this.groups[groupId].options.yAxisOrientation == 'right') {
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this.yAxisRight.addGroup(groupId, this.groups[groupId]);
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this.legendRight.addGroup(groupId, this.groups[groupId]);
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}
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else {
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this.yAxisLeft.addGroup(groupId, this.groups[groupId]);
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this.legendLeft.addGroup(groupId, this.groups[groupId]);
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}
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}
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else {
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this.groups[groupId].update(group);
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if (this.groups[groupId].options.yAxisOrientation == 'right') {
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this.yAxisRight.updateGroup(groupId, this.groups[groupId]);
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this.legendRight.updateGroup(groupId, this.groups[groupId]);
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}
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else {
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this.yAxisLeft.updateGroup(groupId, this.groups[groupId]);
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this.legendLeft.updateGroup(groupId, this.groups[groupId]);
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}
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}
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this.legendLeft.redraw();
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this.legendRight.redraw();
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};
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/**
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* this updates all groups, it is used when there is an update the the itemset.
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*
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* @private
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*/
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LineGraph.prototype._updateAllGroupData = function () {
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if (this.itemsData != null) {
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var groupsContent = {};
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var groupId;
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for (groupId in this.groups) {
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if (this.groups.hasOwnProperty(groupId)) {
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groupsContent[groupId] = [];
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}
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}
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for (var itemId in this.itemsData._data) {
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if (this.itemsData._data.hasOwnProperty(itemId)) {
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var item = this.itemsData._data[itemId];
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if (groupsContent[item.group] === undefined) {
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throw new Error('Cannot find referenced group. Possible reason: items added before groups? Groups need to be added before items, as items refer to groups.')
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}
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item.x = util.convert(item.x,'Date');
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groupsContent[item.group].push(item);
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}
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}
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for (groupId in this.groups) {
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if (this.groups.hasOwnProperty(groupId)) {
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this.groups[groupId].setItems(groupsContent[groupId]);
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}
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}
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}
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};
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/**
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* Create or delete the group holding all ungrouped items. This group is used when
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* there are no groups specified. This anonymous group is called 'graph'.
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* @protected
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*/
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LineGraph.prototype._updateUngrouped = function() {
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if (this.itemsData && this.itemsData != null) {
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var ungroupedCounter = 0;
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for (var itemId in this.itemsData._data) {
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if (this.itemsData._data.hasOwnProperty(itemId)) {
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var item = this.itemsData._data[itemId];
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if (item != undefined) {
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if (item.hasOwnProperty('group')) {
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if (item.group === undefined) {
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item.group = UNGROUPED;
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}
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}
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else {
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item.group = UNGROUPED;
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}
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ungroupedCounter = item.group == UNGROUPED ? ungroupedCounter + 1 : ungroupedCounter;
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}
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}
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}
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if (ungroupedCounter == 0) {
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delete this.groups[UNGROUPED];
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this.legendLeft.removeGroup(UNGROUPED);
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this.legendRight.removeGroup(UNGROUPED);
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this.yAxisLeft.removeGroup(UNGROUPED);
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this.yAxisRight.removeGroup(UNGROUPED);
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}
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else {
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var group = {id: UNGROUPED, content: this.options.defaultGroup};
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this._updateGroup(group, UNGROUPED);
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}
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}
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else {
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delete this.groups[UNGROUPED];
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this.legendLeft.removeGroup(UNGROUPED);
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this.legendRight.removeGroup(UNGROUPED);
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this.yAxisLeft.removeGroup(UNGROUPED);
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this.yAxisRight.removeGroup(UNGROUPED);
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}
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this.legendLeft.redraw();
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this.legendRight.redraw();
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};
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/**
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* Redraw the component, mandatory function
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* @return {boolean} Returns true if the component is resized
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*/
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|
LineGraph.prototype.redraw = function(forceGraphUpdate) {
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var resized = false;
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|
|
this.svg.style.height = ('' + this.options.graphHeight).replace('px','') + 'px';
|
|
if (this.lastWidth === undefined && this.width || this.lastWidth != this.width) {
|
|
resized = true;
|
|
}
|
|
// check if this component is resized
|
|
resized = this._isResized() || resized;
|
|
// check whether zoomed (in that case we need to re-stack everything)
|
|
var visibleInterval = this.body.range.end - this.body.range.start;
|
|
//var zoomed = (visibleInterval != this.lastVisibleInterval) || (this.width != this.lastWidth); // we get this from the range changed event
|
|
this.lastVisibleInterval = visibleInterval;
|
|
this.lastWidth = this.width;
|
|
|
|
// calculate actual size and position
|
|
this.width = this.dom.frame.offsetWidth;
|
|
|
|
// the svg element is three times as big as the width, this allows for fully dragging left and right
|
|
// without reloading the graph. the controls for this are bound to events in the constructor
|
|
if (resized == true) {
|
|
this.svg.style.width = util.option.asSize(3*this.width);
|
|
this.svg.style.left = util.option.asSize(-this.width);
|
|
}
|
|
|
|
if (this.abortedGraphUpdate == true || forceGraphUpdate == true) {
|
|
resized = resized || this._updateGraph();
|
|
}
|
|
else {
|
|
// move the whole svg while dragging
|
|
if (this.lastStart != 0) {
|
|
var offset = this.body.range.start - this.lastStart;
|
|
var range = this.body.range.end - this.body.range.start;
|
|
if (this.width != 0) {
|
|
var rangePerPixelInv = this.width/range;
|
|
var xOffset = offset * rangePerPixelInv;
|
|
this.svg.style.left = (-this.width - xOffset) + 'px';
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
this.legendLeft.redraw();
|
|
this.legendRight.redraw();
|
|
|
|
return resized;
|
|
};
|
|
|
|
|
|
/**
|
|
* Update and redraw the graph.
|
|
*
|
|
*/
|
|
LineGraph.prototype._updateGraph = function () {
|
|
// reset the svg elements
|
|
DOMutil.prepareElements(this.svgElements);
|
|
if (this.width != 0 && this.itemsData != null) {
|
|
var group, i;
|
|
var preprocessedGroupData = {};
|
|
var processedGroupData = {};
|
|
var groupRanges = {};
|
|
var changeCalled = false;
|
|
|
|
// update the height of the graph on each redraw of the graph.
|
|
if (this.autoSizeSVG == true) {
|
|
if (this.options.graphHeight != this.body.domProps.centerContainer.height + 'px') {
|
|
this.options.graphHeight = this.body.domProps.centerContainer.height + 'px';
|
|
this.svg.style.height = this.body.domProps.centerContainer.height + 'px';
|
|
}
|
|
this.autoSizeSVG = false;
|
|
}
|
|
|
|
// getting group Ids
|
|
var groupIds = [];
|
|
for (var groupId in this.groups) {
|
|
if (this.groups.hasOwnProperty(groupId)) {
|
|
group = this.groups[groupId];
|
|
if (group.visible == true && (this.options.groups.visibility[groupId] === undefined || this.options.groups.visibility[groupId] == true)) {
|
|
groupIds.push(groupId);
|
|
}
|
|
}
|
|
}
|
|
if (groupIds.length > 0) {
|
|
// this is the range of the SVG canvas
|
|
var minDate = this.body.util.toGlobalTime(-this.body.domProps.root.width);
|
|
var maxDate = this.body.util.toGlobalTime(2 * this.body.domProps.root.width);
|
|
var groupsData = {};
|
|
// fill groups data, this only loads the data we require based on the timewindow
|
|
this._getRelevantData(groupIds, groupsData, minDate, maxDate);
|
|
|
|
// apply sampling, if disabled, it will pass through this function.
|
|
this._applySampling(groupIds, groupsData);
|
|
|
|
// we transform the X coordinates to detect collisions
|
|
for (i = 0; i < groupIds.length; i++) {
|
|
preprocessedGroupData[groupIds[i]] = this._convertXcoordinates(groupsData[groupIds[i]]);
|
|
}
|
|
|
|
// now all needed data has been collected we start the processing.
|
|
this._getYRanges(groupIds, preprocessedGroupData, groupRanges);
|
|
|
|
// update the Y axis first, we use this data to draw at the correct Y points
|
|
// changeCalled is required to clean the SVG on a change emit.
|
|
changeCalled = this._updateYAxis(groupIds, groupRanges);
|
|
var MAX_CYCLES = 5;
|
|
if (changeCalled == true && this.COUNTER < MAX_CYCLES) {
|
|
DOMutil.cleanupElements(this.svgElements);
|
|
this.abortedGraphUpdate = true;
|
|
this.COUNTER++;
|
|
this.body.emitter.emit('change');
|
|
return true;
|
|
}
|
|
else {
|
|
if (this.COUNTER > MAX_CYCLES) {
|
|
console.log("WARNING: there may be an infinite loop in the _updateGraph emitter cycle.")
|
|
}
|
|
this.COUNTER = 0;
|
|
this.abortedGraphUpdate = false;
|
|
|
|
// With the yAxis scaled correctly, use this to get the Y values of the points.
|
|
for (i = 0; i < groupIds.length; i++) {
|
|
group = this.groups[groupIds[i]];
|
|
processedGroupData[groupIds[i]] = this._convertYcoordinates(groupsData[groupIds[i]], group);
|
|
}
|
|
|
|
// draw the groups
|
|
for (i = 0; i < groupIds.length; i++) {
|
|
group = this.groups[groupIds[i]];
|
|
if (group.options.style != 'bar') { // bar needs to be drawn enmasse
|
|
group.draw(processedGroupData[groupIds[i]], group, this.framework);
|
|
}
|
|
}
|
|
BarGraphFunctions.draw(groupIds, processedGroupData, this.framework);
|
|
}
|
|
}
|
|
}
|
|
|
|
// cleanup unused svg elements
|
|
DOMutil.cleanupElements(this.svgElements);
|
|
return false;
|
|
};
|
|
|
|
|
|
/**
|
|
* first select and preprocess the data from the datasets.
|
|
* the groups have their preselection of data, we now loop over this data to see
|
|
* what data we need to draw. Sorted data is much faster.
|
|
* more optimization is possible by doing the sampling before and using the binary search
|
|
* to find the end date to determine the increment.
|
|
*
|
|
* @param {array} groupIds
|
|
* @param {object} groupsData
|
|
* @param {date} minDate
|
|
* @param {date} maxDate
|
|
* @private
|
|
*/
|
|
LineGraph.prototype._getRelevantData = function (groupIds, groupsData, minDate, maxDate) {
|
|
var group, i, j, item;
|
|
if (groupIds.length > 0) {
|
|
for (i = 0; i < groupIds.length; i++) {
|
|
group = this.groups[groupIds[i]];
|
|
groupsData[groupIds[i]] = [];
|
|
var dataContainer = groupsData[groupIds[i]];
|
|
// optimization for sorted data
|
|
if (group.options.sort == true) {
|
|
var guess = Math.max(0, util.binarySearchValue(group.itemsData, minDate, 'x', 'before'));
|
|
for (j = guess; j < group.itemsData.length; j++) {
|
|
item = group.itemsData[j];
|
|
if (item !== undefined) {
|
|
if (item.x > maxDate) {
|
|
dataContainer.push(item);
|
|
break;
|
|
}
|
|
else {
|
|
dataContainer.push(item);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
for (j = 0; j < group.itemsData.length; j++) {
|
|
item = group.itemsData[j];
|
|
if (item !== undefined) {
|
|
if (item.x > minDate && item.x < maxDate) {
|
|
dataContainer.push(item);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
*
|
|
* @param groupIds
|
|
* @param groupsData
|
|
* @private
|
|
*/
|
|
LineGraph.prototype._applySampling = function (groupIds, groupsData) {
|
|
var group;
|
|
if (groupIds.length > 0) {
|
|
for (var i = 0; i < groupIds.length; i++) {
|
|
group = this.groups[groupIds[i]];
|
|
if (group.options.sampling == true) {
|
|
var dataContainer = groupsData[groupIds[i]];
|
|
if (dataContainer.length > 0) {
|
|
var increment = 1;
|
|
var amountOfPoints = dataContainer.length;
|
|
|
|
// the global screen is used because changing the width of the yAxis may affect the increment, resulting in an endless loop
|
|
// of width changing of the yAxis.
|
|
var xDistance = this.body.util.toGlobalScreen(dataContainer[dataContainer.length - 1].x) - this.body.util.toGlobalScreen(dataContainer[0].x);
|
|
var pointsPerPixel = amountOfPoints / xDistance;
|
|
increment = Math.min(Math.ceil(0.2 * amountOfPoints), Math.max(1, Math.round(pointsPerPixel)));
|
|
|
|
var sampledData = [];
|
|
for (var j = 0; j < amountOfPoints; j += increment) {
|
|
sampledData.push(dataContainer[j]);
|
|
|
|
}
|
|
groupsData[groupIds[i]] = sampledData;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
*
|
|
*
|
|
* @param {array} groupIds
|
|
* @param {object} groupsData
|
|
* @param {object} groupRanges | this is being filled here
|
|
* @private
|
|
*/
|
|
LineGraph.prototype._getYRanges = function (groupIds, groupsData, groupRanges) {
|
|
var groupData, group, i;
|
|
var barCombinedDataLeft = [];
|
|
var barCombinedDataRight = [];
|
|
var options;
|
|
if (groupIds.length > 0) {
|
|
for (i = 0; i < groupIds.length; i++) {
|
|
groupData = groupsData[groupIds[i]];
|
|
options = this.groups[groupIds[i]].options;
|
|
if (groupData.length > 0) {
|
|
group = this.groups[groupIds[i]];
|
|
// if bar graphs are stacked, their range need to be handled differently and accumulated over all groups.
|
|
if (options.barChart.handleOverlap == 'stack' && options.style == 'bar') {
|
|
if (options.yAxisOrientation == 'left') {barCombinedDataLeft = barCombinedDataLeft.concat(group.getYRange(groupData)) ;}
|
|
else {barCombinedDataRight = barCombinedDataRight.concat(group.getYRange(groupData));}
|
|
}
|
|
else {
|
|
groupRanges[groupIds[i]] = group.getYRange(groupData,groupIds[i]);
|
|
}
|
|
}
|
|
}
|
|
|
|
// if bar graphs are stacked, their range need to be handled differently and accumulated over all groups.
|
|
BarGraphFunctions.getStackedBarYRange(barCombinedDataLeft , groupRanges, groupIds, '__barchartLeft' , 'left' );
|
|
BarGraphFunctions.getStackedBarYRange(barCombinedDataRight, groupRanges, groupIds, '__barchartRight', 'right');
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* this sets the Y ranges for the Y axis. It also determines which of the axis should be shown or hidden.
|
|
* @param {Array} groupIds
|
|
* @param {Object} groupRanges
|
|
* @private
|
|
*/
|
|
LineGraph.prototype._updateYAxis = function (groupIds, groupRanges) {
|
|
var changeCalled = false;
|
|
var yAxisLeftUsed = false;
|
|
var yAxisRightUsed = false;
|
|
var minLeft = 1e9, minRight = 1e9, maxLeft = -1e9, maxRight = -1e9, minVal, maxVal;
|
|
// if groups are present
|
|
if (groupIds.length > 0) {
|
|
// this is here to make sure that if there are no items in the axis but there are groups, that there is no infinite draw/redraw loop.
|
|
for (var i = 0; i < groupIds.length; i++) {
|
|
var group = this.groups[groupIds[i]];
|
|
if (group && group.options.yAxisOrientation == 'left') {
|
|
yAxisLeftUsed = true;
|
|
minLeft = 0;
|
|
maxLeft = 0;
|
|
}
|
|
else {
|
|
yAxisRightUsed = true;
|
|
minRight = 0;
|
|
maxRight = 0;
|
|
}
|
|
}
|
|
|
|
// if there are items:
|
|
for (var i = 0; i < groupIds.length; i++) {
|
|
if (groupRanges.hasOwnProperty(groupIds[i])) {
|
|
if (groupRanges[groupIds[i]].ignore !== true) {
|
|
minVal = groupRanges[groupIds[i]].min;
|
|
maxVal = groupRanges[groupIds[i]].max;
|
|
|
|
if (groupRanges[groupIds[i]].yAxisOrientation == 'left') {
|
|
yAxisLeftUsed = true;
|
|
minLeft = minLeft > minVal ? minVal : minLeft;
|
|
maxLeft = maxLeft < maxVal ? maxVal : maxLeft;
|
|
}
|
|
else {
|
|
yAxisRightUsed = true;
|
|
minRight = minRight > minVal ? minVal : minRight;
|
|
maxRight = maxRight < maxVal ? maxVal : maxRight;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (yAxisLeftUsed == true) {
|
|
this.yAxisLeft.setRange(minLeft, maxLeft);
|
|
}
|
|
if (yAxisRightUsed == true) {
|
|
this.yAxisRight.setRange(minRight, maxRight);
|
|
}
|
|
}
|
|
changeCalled = this._toggleAxisVisiblity(yAxisLeftUsed , this.yAxisLeft) || changeCalled;
|
|
changeCalled = this._toggleAxisVisiblity(yAxisRightUsed, this.yAxisRight) || changeCalled;
|
|
|
|
if (yAxisRightUsed == true && yAxisLeftUsed == true) {
|
|
this.yAxisLeft.drawIcons = true;
|
|
this.yAxisRight.drawIcons = true;
|
|
}
|
|
else {
|
|
this.yAxisLeft.drawIcons = false;
|
|
this.yAxisRight.drawIcons = false;
|
|
}
|
|
|
|
this.yAxisRight.master = !yAxisLeftUsed;
|
|
|
|
if (this.yAxisRight.master == false) {
|
|
if (yAxisRightUsed == true) {this.yAxisLeft.lineOffset = this.yAxisRight.width;}
|
|
else {this.yAxisLeft.lineOffset = 0;}
|
|
|
|
changeCalled = this.yAxisLeft.redraw() || changeCalled;
|
|
this.yAxisRight.stepPixelsForced = this.yAxisLeft.stepPixels;
|
|
this.yAxisRight.zeroCrossing = this.yAxisLeft.zeroCrossing;
|
|
changeCalled = this.yAxisRight.redraw() || changeCalled;
|
|
}
|
|
else {
|
|
changeCalled = this.yAxisRight.redraw() || changeCalled;
|
|
}
|
|
|
|
// clean the accumulated lists
|
|
if (groupIds.indexOf('__barchartLeft') != -1) {
|
|
groupIds.splice(groupIds.indexOf('__barchartLeft'),1);
|
|
}
|
|
if (groupIds.indexOf('__barchartRight') != -1) {
|
|
groupIds.splice(groupIds.indexOf('__barchartRight'),1);
|
|
}
|
|
|
|
return changeCalled;
|
|
};
|
|
|
|
|
|
/**
|
|
* This shows or hides the Y axis if needed. If there is a change, the changed event is emitted by the updateYAxis function
|
|
*
|
|
* @param {boolean} axisUsed
|
|
* @returns {boolean}
|
|
* @private
|
|
* @param axis
|
|
*/
|
|
LineGraph.prototype._toggleAxisVisiblity = function (axisUsed, axis) {
|
|
var changed = false;
|
|
if (axisUsed == false) {
|
|
if (axis.dom.frame.parentNode && axis.hidden == false) {
|
|
axis.hide()
|
|
changed = true;
|
|
}
|
|
}
|
|
else {
|
|
if (!axis.dom.frame.parentNode && axis.hidden == true) {
|
|
axis.show();
|
|
changed = true;
|
|
}
|
|
}
|
|
return changed;
|
|
};
|
|
|
|
|
|
/**
|
|
* This uses the DataAxis object to generate the correct X coordinate on the SVG window. It uses the
|
|
* util function toScreen to get the x coordinate from the timestamp. It also pre-filters the data and get the minMax ranges for
|
|
* the yAxis.
|
|
*
|
|
* @param datapoints
|
|
* @returns {Array}
|
|
* @private
|
|
*/
|
|
LineGraph.prototype._convertXcoordinates = function (datapoints) {
|
|
var extractedData = [];
|
|
var xValue, yValue;
|
|
var toScreen = this.body.util.toScreen;
|
|
|
|
for (var i = 0; i < datapoints.length; i++) {
|
|
xValue = toScreen(datapoints[i].x) + this.width;
|
|
yValue = datapoints[i].y;
|
|
extractedData.push({x: xValue, y: yValue});
|
|
}
|
|
|
|
return extractedData;
|
|
};
|
|
|
|
|
|
/**
|
|
* This uses the DataAxis object to generate the correct X coordinate on the SVG window. It uses the
|
|
* util function toScreen to get the x coordinate from the timestamp. It also pre-filters the data and get the minMax ranges for
|
|
* the yAxis.
|
|
*
|
|
* @param datapoints
|
|
* @param group
|
|
* @returns {Array}
|
|
* @private
|
|
*/
|
|
LineGraph.prototype._convertYcoordinates = function (datapoints, group) {
|
|
var extractedData = [];
|
|
var xValue, yValue;
|
|
var toScreen = this.body.util.toScreen;
|
|
var axis = this.yAxisLeft;
|
|
var svgHeight = Number(this.svg.style.height.replace('px',''));
|
|
if (group.options.yAxisOrientation == 'right') {
|
|
axis = this.yAxisRight;
|
|
}
|
|
|
|
for (var i = 0; i < datapoints.length; i++) {
|
|
xValue = toScreen(datapoints[i].x) + this.width;
|
|
yValue = Math.round(axis.convertValue(datapoints[i].y));
|
|
extractedData.push({x: xValue, y: yValue});
|
|
}
|
|
|
|
group.setZeroPosition(Math.min(svgHeight, axis.convertValue(0)));
|
|
|
|
return extractedData;
|
|
};
|
|
|
|
|
|
module.exports = LineGraph;
|