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1059 lines
34 KiB
1059 lines
34 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 Bars = require('./graph2d_types/bar');
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var Lines = require('./graph2d_types/line');
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var Points = require('./graph2d_types/points');
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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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stack: false,
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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, zero
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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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sideBySide: false,
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align: 'center' // left, center, right
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},
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interpolation: {
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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: {}, //Defaults are done on DataAxis level
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legend: {}, //Defaults are done on Legend level
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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 lineGraph 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.updateSVGheight = false;
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this.updateSVGheightOnResize = false;
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this.forceGraphUpdate = true;
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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.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.props.width);
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me.forceGraphUpdate = true;
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//Is this local redraw necessary? (Core also does a change event!)
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me.redraw.call(me);
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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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}
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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 = 'vis-line-graph';
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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', 'stack', 'height', 'graphHeight', 'yAxisOrientation', 'style', 'barChart', 'dataAxis', 'sort', 'groups'];
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if (options.graphHeight === undefined && options.height !== undefined) {
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this.updateSVGheight = true;
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this.updateSVGheightOnResize = 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.updateSVGheight = 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, 'interpolation');
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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.interpolation) {
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if (typeof options.interpolation == 'object') {
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if (options.interpolation.parametrization) {
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if (options.interpolation.parametrization == 'uniform') {
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this.options.interpolation.alpha = 0;
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}
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else if (options.interpolation.parametrization == 'chordal') {
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this.options.interpolation.alpha = 1.0;
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}
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else {
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this.options.interpolation.parametrization = 'centripetal';
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this.options.interpolation.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) { //not on initial run?
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this.forceGraphUpdate=true;
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this.body.emitter.emit("_change",{queue: 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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};
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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.off(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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for (var i = 0; i < ids.length; i++) {
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this._removeGroup(ids[i]);
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}
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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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};
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LineGraph.prototype._onUpdate = function (ids) {
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this._updateAllGroupData();
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};
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LineGraph.prototype._onAdd = function (ids) {
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this._onUpdate(ids);
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};
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LineGraph.prototype._onRemove = function (ids) {
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this._onUpdate(ids);
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};
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LineGraph.prototype._onUpdateGroups = function (groupIds) {
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this._updateAllGroupData();
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};
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LineGraph.prototype._onAddGroups = function (groupIds) {
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this._onUpdateGroups(groupIds);
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};
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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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this._removeGroup(groupIds[i]);
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}
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this.forceGraphUpdate = true;
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this.body.emitter.emit("_change",{queue: true});
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};
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/**
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* this cleans the group out off the legends and the dataaxis
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* @param groupId
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* @private
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*/
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LineGraph.prototype._removeGroup = function (groupId) {
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if (this.groups.hasOwnProperty(groupId)) {
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if (this.groups[groupId].options.yAxisOrientation == 'right') {
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this.yAxisRight.removeGroup(groupId);
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this.legendRight.removeGroup(groupId);
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this.legendRight.redraw();
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}
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else {
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this.yAxisLeft.removeGroup(groupId);
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this.legendLeft.removeGroup(groupId);
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this.legendLeft.redraw();
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}
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delete this.groups[groupId];
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}
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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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//If yAxisOrientation changed, clean out the group from the other axis.
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this.yAxisLeft.removeGroup(groupId);
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this.legendLeft.removeGroup(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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//If yAxisOrientation changed, clean out the group from the other axis.
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this.yAxisRight.removeGroup(groupId);
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this.legendRight.removeGroup(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 items = this.itemsData.get();
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//pre-Determine array sizes, for more efficient memory claim
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var groupCounts = {};
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for (var i = 0; i < items.length; i++) {
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var item = items[i];
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var groupId = item.group;
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if (groupId === null || groupId === undefined) {
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groupId = UNGROUPED;
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}
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groupCounts.hasOwnProperty(groupId) ? groupCounts[groupId]++ : groupCounts[groupId] = 1;
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}
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//Now insert data into the arrays.
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for (var i = 0; i < items.length; i++) {
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var item = items[i];
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var groupId = item.group;
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if (groupId === null || groupId === undefined) {
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groupId = UNGROUPED;
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}
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if (!groupsContent.hasOwnProperty(groupId)) {
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groupsContent[groupId] = new Array(groupCounts[groupId]);
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}
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//Copy data (because of unmodifiable DataView input.
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var extended = util.bridgeObject(item);
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extended.x = util.convert(item.x, 'Date');
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extended.orginalY = item.y; //real Y
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extended.y = Number(item.y);
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var index= groupsContent[groupId].length - groupCounts[groupId]--;
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groupsContent[groupId][index] = extended;
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}
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//Make sure all groups are present, to allow removal of old groups
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for (var groupId in this.groups){
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if (this.groups.hasOwnProperty(groupId)){
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if (!groupsContent.hasOwnProperty(groupId)) {
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groupsContent[groupId] = new Array(0);
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}
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}
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}
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|
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//Update legendas, style and axis
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for (var groupId in groupsContent) {
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if (groupsContent.hasOwnProperty(groupId)) {
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if (groupsContent[groupId].length == 0) {
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if (this.groups.hasOwnProperty(groupId)) {
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this._removeGroup(groupId);
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}
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} else {
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var group = undefined;
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if (this.groupsData != undefined) {
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group = this.groupsData.get(groupId);
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}
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if (group == undefined) {
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group = {id: groupId, content: this.options.defaultGroup + groupId};
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}
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this._updateGroup(group, 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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this.forceGraphUpdate = true;
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this.body.emitter.emit("_change",{queue: true});
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}
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};
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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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*/
|
|
LineGraph.prototype.redraw = function () {
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var resized = false;
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|
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// calculate actual size and position
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|
this.props.width = this.dom.frame.offsetWidth;
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this.props.height = this.body.domProps.centerContainer.height
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- this.body.domProps.border.top
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- this.body.domProps.border.bottom;
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|
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// check if this component is resized
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resized = this._isResized() || resized;
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// check whether zoomed (in that case we need to re-stack everything)
|
|
var visibleInterval = this.body.range.end - this.body.range.start;
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var zoomed = (visibleInterval != this.lastVisibleInterval);
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this.lastVisibleInterval = visibleInterval;
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|
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// the svg element is three times as big as the width, this allows for fully dragging left and right
|
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// without reloading the graph. the controls for this are bound to events in the constructor
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if (resized == true) {
|
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this.svg.style.width = util.option.asSize(3 * this.props.width);
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this.svg.style.left = util.option.asSize(-this.props.width);
|
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|
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// if the height of the graph is set as proportional, change the height of the svg
|
|
if ((this.options.height + '').indexOf("%") != -1 || this.updateSVGheightOnResize == true) {
|
|
this.updateSVGheight = true;
|
|
}
|
|
}
|
|
|
|
// update the height of the graph on each redraw of the graph.
|
|
if (this.updateSVGheight == true) {
|
|
if (this.options.graphHeight != this.props.height + 'px') {
|
|
this.options.graphHeight = this.props.height + 'px';
|
|
this.svg.style.height = this.props.height + 'px';
|
|
}
|
|
this.updateSVGheight = false;
|
|
}
|
|
else {
|
|
this.svg.style.height = ('' + this.options.graphHeight).replace('px', '') + 'px';
|
|
}
|
|
|
|
// zoomed is here to ensure that animations are shown correctly.
|
|
if (resized == true || zoomed == true || this.abortedGraphUpdate == true || this.forceGraphUpdate == true) {
|
|
resized = this._updateGraph() || resized;
|
|
this.forceGraphUpdate = false;
|
|
}
|
|
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.props.width != 0) {
|
|
var rangePerPixelInv = this.props.width / range;
|
|
var xOffset = offset * rangePerPixelInv;
|
|
this.svg.style.left = (-this.props.width - xOffset) + 'px';
|
|
}
|
|
}
|
|
}
|
|
this.legendLeft.redraw();
|
|
this.legendRight.redraw();
|
|
return resized;
|
|
};
|
|
|
|
|
|
LineGraph.prototype._getSortedGroupIds = function(){
|
|
// getting group Ids
|
|
var grouplist = [];
|
|
for (var groupId in this.groups) {
|
|
if (this.groups.hasOwnProperty(groupId)) {
|
|
var group = this.groups[groupId];
|
|
if (group.visible == true && (this.options.groups.visibility[groupId] === undefined || this.options.groups.visibility[groupId] == true)) {
|
|
grouplist.push({id:groupId,zIndex:group.options.zIndex});
|
|
}
|
|
}
|
|
}
|
|
util.insertSort(grouplist,function(a,b){
|
|
var az = a.zIndex;
|
|
var bz = b.zIndex;
|
|
if (az === undefined) az=0;
|
|
if (bz === undefined) bz=0;
|
|
return az==bz? 0: (az<bz ? -1: 1);
|
|
});
|
|
var groupIds = new Array(grouplist.length);
|
|
for (var i=0; i< grouplist.length; i++){
|
|
groupIds[i] = grouplist[i].id;
|
|
}
|
|
return groupIds;
|
|
}
|
|
|
|
/**
|
|
* Update and redraw the graph.
|
|
*
|
|
*/
|
|
LineGraph.prototype._updateGraph = function () {
|
|
// reset the svg elements
|
|
DOMutil.prepareElements(this.svgElements);
|
|
if (this.props.width != 0 && this.itemsData != null) {
|
|
var group, i;
|
|
var groupRanges = {};
|
|
var changeCalled = false;
|
|
// 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);
|
|
|
|
// getting group Ids
|
|
var groupIds = this._getSortedGroupIds();
|
|
if (groupIds.length > 0) {
|
|
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++) {
|
|
this._convertXcoordinates(groupsData[groupIds[i]]);
|
|
}
|
|
|
|
// now all needed data has been collected we start the processing.
|
|
this._getYRanges(groupIds, groupsData, groupRanges);
|
|
|
|
// update the Y axis first, we use this data to draw at the correct Y points
|
|
changeCalled = this._updateYAxis(groupIds, groupRanges);
|
|
|
|
// at changeCalled, abort this update cycle as the graph needs another update with new Width input from the Redraw container.
|
|
// Cleanup SVG elements on abort.
|
|
if (changeCalled == true) {
|
|
DOMutil.cleanupElements(this.svgElements);
|
|
this.abortedGraphUpdate = true;
|
|
return true;
|
|
}
|
|
this.abortedGraphUpdate = false;
|
|
|
|
// With the yAxis scaled correctly, use this to get the Y values of the points.
|
|
var below = undefined;
|
|
for (i = 0; i < groupIds.length; i++) {
|
|
group = this.groups[groupIds[i]];
|
|
if (this.options.stack === true && this.options.style === 'line') {
|
|
if (group.options.excludeFromStacking == undefined || !group.options.excludeFromStacking) {
|
|
if (below != undefined) {
|
|
this._stack(groupsData[group.id], groupsData[below.id]);
|
|
if (group.options.shaded.enabled == true && group.options.shaded.orientation !== "group"){
|
|
if (group.options.shaded.orientation == "top" && below.options.shaded.orientation !== "group"){
|
|
below.options.shaded.orientation="group";
|
|
below.options.shaded.groupId=group.id;
|
|
} else {
|
|
group.options.shaded.orientation="group";
|
|
group.options.shaded.groupId=below.id;
|
|
}
|
|
}
|
|
}
|
|
below = group;
|
|
}
|
|
}
|
|
this._convertYcoordinates(groupsData[groupIds[i]], group);
|
|
}
|
|
|
|
//Precalculate paths and draw shading if appropriate. This will make sure the shading is always behind any lines.
|
|
var paths = {};
|
|
for (i = 0; i < groupIds.length; i++) {
|
|
group = this.groups[groupIds[i]];
|
|
if (group.options.style === 'line' && group.options.shaded.enabled == true) {
|
|
var dataset = groupsData[groupIds[i]];
|
|
if (dataset == null || dataset.length == 0) {
|
|
continue;
|
|
}
|
|
if (!paths.hasOwnProperty(groupIds[i])) {
|
|
paths[groupIds[i]] = Lines.calcPath(dataset, group);
|
|
}
|
|
if (group.options.shaded.orientation === "group") {
|
|
var subGroupId = group.options.shaded.groupId;
|
|
if (groupIds.indexOf(subGroupId) === -1) {
|
|
console.log(group.id + ": Unknown shading group target given:" + subGroupId);
|
|
continue;
|
|
}
|
|
if (!paths.hasOwnProperty(subGroupId)) {
|
|
paths[subGroupId] = Lines.calcPath(groupsData[subGroupId], this.groups[subGroupId]);
|
|
}
|
|
Lines.drawShading(paths[groupIds[i]], group, paths[subGroupId], this.framework);
|
|
}
|
|
else {
|
|
Lines.drawShading(paths[groupIds[i]], group, undefined, this.framework);
|
|
}
|
|
}
|
|
}
|
|
|
|
// draw the groups, calculating paths if still necessary.
|
|
Bars.draw(groupIds, groupsData, this.framework);
|
|
for (i = 0; i < groupIds.length; i++) {
|
|
group = this.groups[groupIds[i]];
|
|
if (groupsData[groupIds[i]].length > 0) {
|
|
switch (group.options.style) {
|
|
case "line":
|
|
if (!paths.hasOwnProperty(groupIds[i])) {
|
|
paths[groupIds[i]] = Lines.calcPath(groupsData[groupIds[i]], group);
|
|
}
|
|
Lines.draw(paths[groupIds[i]], group, this.framework);
|
|
//explicit no break;
|
|
case "point":
|
|
//explicit no break;
|
|
case "points":
|
|
if (group.options.style == "point" || group.options.style == "points" || group.options.drawPoints.enabled == true) {
|
|
Points.draw(groupsData[groupIds[i]], group, this.framework);
|
|
}
|
|
break;
|
|
case "bar":
|
|
// bar needs to be drawn enmasse
|
|
//explicit no break
|
|
default:
|
|
//do nothing...
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
// cleanup unused svg elements
|
|
DOMutil.cleanupElements(this.svgElements);
|
|
return false;
|
|
};
|
|
|
|
LineGraph.prototype._stack = function (data, subData) {
|
|
var index, dx, dy, subPrevPoint, subNextPoint;
|
|
index = 0;
|
|
// for each data point we look for a matching on in the set below
|
|
for (var j = 0; j < data.length; j++) {
|
|
subPrevPoint = undefined;
|
|
subNextPoint = undefined;
|
|
// we look for time matches or a before-after point
|
|
for (var k = index; k < subData.length; k++) {
|
|
// if times match exactly
|
|
if (subData[k].x === data[j].x) {
|
|
subPrevPoint = subData[k];
|
|
subNextPoint = subData[k];
|
|
index = k;
|
|
break;
|
|
}
|
|
else if (subData[k].x > data[j].x) { // overshoot
|
|
subNextPoint = subData[k];
|
|
if (k == 0) {
|
|
subPrevPoint = subNextPoint;
|
|
}
|
|
else {
|
|
subPrevPoint = subData[k - 1];
|
|
}
|
|
index = k;
|
|
break;
|
|
}
|
|
}
|
|
// in case the last data point has been used, we assume it stays like this.
|
|
if (subNextPoint === undefined) {
|
|
subPrevPoint = subData[subData.length - 1];
|
|
subNextPoint = subData[subData.length - 1];
|
|
}
|
|
// linear interpolation
|
|
dx = subNextPoint.x - subPrevPoint.x;
|
|
dy = subNextPoint.y - subPrevPoint.y;
|
|
if (dx == 0) {
|
|
data[j].y = data[j].orginalY + subNextPoint.y;
|
|
}
|
|
else {
|
|
data[j].y = data[j].orginalY + (dy / dx) * (data[j].x - subPrevPoint.x) + subPrevPoint.y; // ax + b where b is data[j].y
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* 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]];
|
|
var itemsData = group.getItems();
|
|
// optimization for sorted data
|
|
if (group.options.sort == true) {
|
|
var dateComparator = function (a, b) {
|
|
return a.getTime() == b.getTime() ? 0 : a < b ? -1 : 1
|
|
};
|
|
var first = Math.max(0, util.binarySearchValue(itemsData, minDate, 'x', 'before', dateComparator));
|
|
var last = Math.min(itemsData.length, util.binarySearchValue(itemsData, maxDate, 'x', 'after', dateComparator) + 1);
|
|
if (last <= 0) {
|
|
last = itemsData.length;
|
|
}
|
|
var dataContainer = new Array(last-first);
|
|
for (j = first; j < last; j++) {
|
|
item = group.itemsData[j];
|
|
dataContainer[j-first] = item;
|
|
}
|
|
groupsData[groupIds[i]] = dataContainer;
|
|
}
|
|
else {
|
|
// If unsorted data, all data is relevant, just returning entire structure
|
|
groupsData[groupIds[i]] = group.itemsData;
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
*
|
|
* @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 = new Array(amountOfPoints);
|
|
for (var j = 0; j < amountOfPoints; j += increment) {
|
|
var idx = Math.round(j/increment);
|
|
sampledData[idx]=dataContainer[j];
|
|
}
|
|
groupsData[groupIds[i]] = sampledData.splice(0,Math.round(amountOfPoints/increment));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
*
|
|
*
|
|
* @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 combinedDataLeft = [];
|
|
var combinedDataRight = [];
|
|
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.stack === true && options.style === 'bar') {
|
|
if (options.yAxisOrientation === 'left') {
|
|
combinedDataLeft = combinedDataLeft.concat(group.getItems());
|
|
}
|
|
else {
|
|
combinedDataRight = combinedDataRight.concat(group.getItems());
|
|
}
|
|
}
|
|
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.
|
|
Bars.getStackedYRange(combinedDataLeft, groupRanges, groupIds, '__barStackLeft', 'left');
|
|
Bars.getStackedYRange(combinedDataRight, groupRanges, groupIds, '__barStackRight', '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 resized = 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 != 'right') {
|
|
yAxisLeftUsed = true;
|
|
minLeft = 1e9;
|
|
maxLeft = -1e9;
|
|
}
|
|
else if (group && group.options.yAxisOrientation) {
|
|
yAxisRightUsed = true;
|
|
minRight = 1e9;
|
|
maxRight = -1e9;
|
|
}
|
|
}
|
|
|
|
// 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 != 'right') {
|
|
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);
|
|
}
|
|
}
|
|
resized = this._toggleAxisVisiblity(yAxisLeftUsed, this.yAxisLeft) || resized;
|
|
resized = this._toggleAxisVisiblity(yAxisRightUsed, this.yAxisRight) || resized;
|
|
|
|
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;
|
|
this.yAxisRight.masterAxis = this.yAxisLeft;
|
|
|
|
if (this.yAxisRight.master == false) {
|
|
if (yAxisRightUsed == true) {
|
|
this.yAxisLeft.lineOffset = this.yAxisRight.width;
|
|
}
|
|
else {
|
|
this.yAxisLeft.lineOffset = 0;
|
|
}
|
|
|
|
resized = this.yAxisLeft.redraw() || resized;
|
|
resized = this.yAxisRight.redraw() || resized;
|
|
}
|
|
else {
|
|
resized = this.yAxisRight.redraw() || resized;
|
|
}
|
|
|
|
// clean the accumulated lists
|
|
var tempGroups = ['__barStackLeft', '__barStackRight', '__lineStackLeft', '__lineStackRight'];
|
|
for (var i = 0; i < tempGroups.length; i++) {
|
|
if (groupIds.indexOf(tempGroups[i]) != -1) {
|
|
groupIds.splice(groupIds.indexOf(tempGroups[i]), 1);
|
|
}
|
|
}
|
|
|
|
return resized;
|
|
};
|
|
|
|
|
|
/**
|
|
* 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
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* the yAxis.
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*
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* @param datapoints
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* @returns {Array}
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* @private
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*/
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LineGraph.prototype._convertXcoordinates = function (datapoints) {
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var toScreen = this.body.util.toScreen;
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for (var i = 0; i < datapoints.length; i++) {
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datapoints[i].screen_x = toScreen(datapoints[i].x) + this.props.width;
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datapoints[i].screen_y = datapoints[i].y; //starting point for range calculations
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}
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};
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/**
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* This uses the DataAxis object to generate the correct X coordinate on the SVG window. It uses the
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* 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.
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|
*
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* @param datapoints
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* @param group
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* @returns {Array}
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* @private
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*/
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LineGraph.prototype._convertYcoordinates = function (datapoints, group) {
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var axis = this.yAxisLeft;
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var svgHeight = Number(this.svg.style.height.replace('px', ''));
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if (group.options.yAxisOrientation == 'right') {
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axis = this.yAxisRight;
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}
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for (var i = 0; i < datapoints.length; i++) {
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datapoints[i].screen_y = Math.round(axis.convertValue(datapoints[i].y));
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}
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group.setZeroPosition(Math.min(svgHeight, axis.convertValue(0)));
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};
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module.exports = LineGraph;
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