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646 lines
19 KiB
646 lines
19 KiB
var util = require('../../util');
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var DOMutil = require('../../DOMutil');
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var Component = require('./Component');
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var DataStep = require('../DataStep');
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/**
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* A horizontal time axis
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* @param {Object} [options] See DataAxis.setOptions for the available
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* options.
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* @constructor DataAxis
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* @extends Component
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* @param body
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*/
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function DataAxis (body, options, svg, linegraphOptions) {
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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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orientation: 'left', // supported: 'left', 'right'
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showMinorLabels: true,
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showMajorLabels: true,
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icons: true,
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majorLinesOffset: 7,
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minorLinesOffset: 4,
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labelOffsetX: 10,
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labelOffsetY: 2,
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iconWidth: 20,
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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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title: {
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left: {text:undefined},
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right: {text:undefined}
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},
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format: {
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left: {decimals: undefined},
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right: {decimals: undefined}
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}
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};
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this.linegraphOptions = linegraphOptions;
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this.linegraphSVG = svg;
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this.props = {};
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this.DOMelements = { // dynamic elements
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lines: {},
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labels: {},
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title: {}
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};
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this.dom = {};
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this.range = {start:0, end:0};
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this.options = util.extend({}, this.defaultOptions);
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this.conversionFactor = 1;
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this.setOptions(options);
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this.width = Number(('' + this.options.width).replace("px",""));
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this.minWidth = this.width;
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this.height = this.linegraphSVG.offsetHeight;
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this.hidden = false;
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this.stepPixels = 25;
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this.stepPixelsForced = 25;
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this.zeroCrossing = -1;
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this.amountOfSteps = -1;
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this.lineOffset = 0;
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this.master = true;
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this.svgElements = {};
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this.iconsRemoved = false;
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this.groups = {};
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this.amountOfGroups = 0;
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// create the HTML DOM
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this._create();
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var me = this;
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this.body.emitter.on("verticalDrag", function() {
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me.dom.lineContainer.style.top = me.body.domProps.scrollTop + 'px';
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});
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}
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DataAxis.prototype = new Component();
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DataAxis.prototype.addGroup = function(label, graphOptions) {
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if (!this.groups.hasOwnProperty(label)) {
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this.groups[label] = graphOptions;
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}
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this.amountOfGroups += 1;
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};
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DataAxis.prototype.updateGroup = function(label, graphOptions) {
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this.groups[label] = graphOptions;
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};
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DataAxis.prototype.removeGroup = function(label) {
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if (this.groups.hasOwnProperty(label)) {
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delete this.groups[label];
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this.amountOfGroups -= 1;
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}
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};
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DataAxis.prototype.setOptions = function (options) {
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if (options) {
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var redraw = false;
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if (this.options.orientation != options.orientation && options.orientation !== undefined) {
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redraw = true;
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}
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var fields = [
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'orientation',
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'showMinorLabels',
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'showMajorLabels',
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'icons',
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'majorLinesOffset',
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'minorLinesOffset',
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'labelOffsetX',
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'labelOffsetY',
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'iconWidth',
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'width',
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'visible',
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'customRange',
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'title',
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'format',
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'alignZeros'
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];
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util.selectiveExtend(fields, this.options, options);
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this.minWidth = Number(('' + this.options.width).replace("px",""));
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if (redraw === true && this.dom.frame) {
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this.hide();
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this.show();
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}
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}
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};
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/**
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* Create the HTML DOM for the DataAxis
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*/
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DataAxis.prototype._create = function() {
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this.dom.frame = document.createElement('div');
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this.dom.frame.style.width = this.options.width;
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this.dom.frame.style.height = this.height;
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this.dom.lineContainer = document.createElement('div');
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this.dom.lineContainer.style.width = '100%';
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this.dom.lineContainer.style.height = this.height;
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this.dom.lineContainer.style.position = 'relative';
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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 = "absolute";
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this.svg.style.top = '0px';
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this.svg.style.height = '100%';
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this.svg.style.width = '100%';
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this.svg.style.display = "block";
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this.dom.frame.appendChild(this.svg);
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};
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DataAxis.prototype._redrawGroupIcons = function () {
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DOMutil.prepareElements(this.svgElements);
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var x;
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var iconWidth = this.options.iconWidth;
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var iconHeight = 15;
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var iconOffset = 4;
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var y = iconOffset + 0.5 * iconHeight;
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if (this.options.orientation === 'left') {
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x = iconOffset;
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}
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else {
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x = this.width - iconWidth - iconOffset;
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}
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var groupArray = Object.keys(this.groups);
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groupArray.sort(function (a,b) {
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return (a < b ? -1 : 1);
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})
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for (var i = 0; i < groupArray.length; i++) {
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var groupId = groupArray[i];
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if (this.groups[groupId].visible === true && (this.linegraphOptions.visibility[groupId] === undefined || this.linegraphOptions.visibility[groupId] === true)) {
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this.groups[groupId].drawIcon(x, y, this.svgElements, this.svg, iconWidth, iconHeight);
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y += iconHeight + iconOffset;
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}
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}
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DOMutil.cleanupElements(this.svgElements);
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this.iconsRemoved = false;
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};
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DataAxis.prototype._cleanupIcons = function() {
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if (this.iconsRemoved === false) {
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DOMutil.prepareElements(this.svgElements);
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DOMutil.cleanupElements(this.svgElements);
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this.iconsRemoved = true;
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}
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}
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/**
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* Create the HTML DOM for the DataAxis
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*/
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DataAxis.prototype.show = function() {
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this.hidden = false;
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if (!this.dom.frame.parentNode) {
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if (this.options.orientation === 'left') {
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this.body.dom.left.appendChild(this.dom.frame);
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}
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else {
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this.body.dom.right.appendChild(this.dom.frame);
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}
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}
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if (!this.dom.lineContainer.parentNode) {
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this.body.dom.backgroundHorizontal.appendChild(this.dom.lineContainer);
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}
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};
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/**
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* Create the HTML DOM for the DataAxis
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*/
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DataAxis.prototype.hide = function() {
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this.hidden = true;
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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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if (this.dom.lineContainer.parentNode) {
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this.dom.lineContainer.parentNode.removeChild(this.dom.lineContainer);
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}
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};
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/**
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* Set a range (start and end)
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* @param end
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* @param start
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* @param end
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*/
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DataAxis.prototype.setRange = function (start, end) {
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if (this.master === false && this.options.alignZeros === true && this.zeroCrossing != -1) {
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if (start > 0) {
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start = 0;
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}
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}
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this.range.start = start;
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this.range.end = end;
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};
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/**
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* Repaint the component
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* @return {boolean} Returns true if the component is resized
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*/
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DataAxis.prototype.redraw = function () {
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var resized = false;
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var activeGroups = 0;
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// Make sure the line container adheres to the vertical scrolling.
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this.dom.lineContainer.style.top = this.body.domProps.scrollTop + 'px';
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for (var groupId in this.groups) {
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if (this.groups.hasOwnProperty(groupId)) {
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if (this.groups[groupId].visible === true && (this.linegraphOptions.visibility[groupId] === undefined || this.linegraphOptions.visibility[groupId] === true)) {
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activeGroups++;
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}
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}
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}
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if (this.amountOfGroups === 0 || activeGroups === 0) {
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this.hide();
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}
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else {
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this.show();
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this.height = Number(this.linegraphSVG.style.height.replace("px",""));
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// svg offsetheight did not work in firefox and explorer...
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this.dom.lineContainer.style.height = this.height + 'px';
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this.width = this.options.visible === true ? Number(('' + this.options.width).replace("px","")) : 0;
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var props = this.props;
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var frame = this.dom.frame;
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// update classname
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frame.className = 'vis-data-axis';
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// calculate character width and height
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this._calculateCharSize();
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var orientation = this.options.orientation;
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var showMinorLabels = this.options.showMinorLabels;
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var showMajorLabels = this.options.showMajorLabels;
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// determine the width and height of the elements for the axis
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props.minorLabelHeight = showMinorLabels ? props.minorCharHeight : 0;
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props.majorLabelHeight = showMajorLabels ? props.majorCharHeight : 0;
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props.minorLineWidth = this.body.dom.backgroundHorizontal.offsetWidth - this.lineOffset - this.width + 2 * this.options.minorLinesOffset;
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props.minorLineHeight = 1;
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props.majorLineWidth = this.body.dom.backgroundHorizontal.offsetWidth - this.lineOffset - this.width + 2 * this.options.majorLinesOffset;
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props.majorLineHeight = 1;
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// take frame offline while updating (is almost twice as fast)
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if (orientation === 'left') {
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frame.style.top = '0';
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frame.style.left = '0';
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frame.style.bottom = '';
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frame.style.width = this.width + 'px';
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frame.style.height = this.height + "px";
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this.props.width = this.body.domProps.left.width;
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this.props.height = this.body.domProps.left.height;
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}
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else { // right
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frame.style.top = '';
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frame.style.bottom = '0';
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frame.style.left = '0';
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frame.style.width = this.width + 'px';
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frame.style.height = this.height + "px";
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this.props.width = this.body.domProps.right.width;
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this.props.height = this.body.domProps.right.height;
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}
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resized = this._redrawLabels();
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resized = this._isResized() || resized;
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if (this.options.icons === true) {
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this._redrawGroupIcons();
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}
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else {
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this._cleanupIcons();
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}
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this._redrawTitle(orientation);
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}
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return resized;
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};
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/**
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* Repaint major and minor text labels and vertical grid lines
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* @private
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*/
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DataAxis.prototype._redrawLabels = function () {
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var resized = false;
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DOMutil.prepareElements(this.DOMelements.lines);
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DOMutil.prepareElements(this.DOMelements.labels);
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var orientation = this.options['orientation'];
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// get the range for the slaved axis
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var step;
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if (this.master === false) {
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var stepSize, rangeStart, rangeEnd, minimumStep;
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if (this.zeroCrossing !== -1 && this.options.alignZeros === true) {
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if (this.range.end > 0) {
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stepSize = this.range.end / this.zeroCrossing; // size of one step
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rangeStart = this.range.end - this.amountOfSteps * stepSize;
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rangeEnd = this.range.end;
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}
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else {
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// all of the range (including start) has to be done before the zero crossing.
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stepSize = -1 * this.range.start / (this.amountOfSteps - this.zeroCrossing); // absolute size of a step
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rangeStart = this.range.start;
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rangeEnd = this.range.start + stepSize * this.amountOfSteps;
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}
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}
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else {
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rangeStart = this.range.start;
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rangeEnd = this.range.end;
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}
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minimumStep = this.stepPixels;
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}
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else {
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// calculate range and step (step such that we have space for 7 characters per label)
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minimumStep = this.props.majorCharHeight;
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rangeStart = this.range.start;
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rangeEnd = this.range.end;
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}
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this.step = step = new DataStep(
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rangeStart,
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rangeEnd,
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minimumStep,
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this.dom.frame.offsetHeight,
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this.options.customRange[this.options.orientation],
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this.master === false && this.options.alignZeros // does the step have to align zeros? only if not master and the options is on
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);
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// the slave axis needs to use the same horizontal lines as the master axis.
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if (this.master === true) {
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this.stepPixels = ((this.dom.frame.offsetHeight) / step.marginRange) * step.step;
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this.amountOfSteps = Math.ceil(this.dom.frame.offsetHeight / this.stepPixels);
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}
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else {
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// align with zero
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if (this.options.alignZeros === true && this.zeroCrossing !== -1) {
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// distance is the amount of steps away from the zero crossing we are.
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let distance = (step.current - this.zeroCrossing * step.step) / step.step;
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this.step.shift(distance);
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}
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}
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// value at the bottom of the SVG
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this.valueAtBottom = step.marginEnd;
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// Get the number of decimal places
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var decimals;
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if(this.options.format[orientation] !== undefined) {
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decimals = this.options.format[orientation].decimals;
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}
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this.maxLabelSize = 0;
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var y = 0; // init value
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var stepIndex = 0; // init value
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var isMajor = false; // init value
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while (stepIndex < this.amountOfSteps) {
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y = Math.round(stepIndex * this.stepPixels);
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isMajor = step.isMajor();
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if (stepIndex > 0 && stepIndex !== this.amountOfSteps) {
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if (this.options['showMinorLabels'] && isMajor === false || this.master === false && this.options['showMinorLabels'] === true) {
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this._redrawLabel(y - 2, step.getCurrent(decimals), orientation, 'vis-y-axis vis-minor', this.props.minorCharHeight);
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}
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if (isMajor && this.options['showMajorLabels'] && this.master === true ||
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this.options['showMinorLabels'] === false && this.master === false && isMajor === true) {
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if (y >= 0) {
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this._redrawLabel(y - 2, step.getCurrent(decimals), orientation, 'vis-y-axis vis-major', this.props.majorCharHeight);
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}
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this._redrawLine(y, orientation, 'vis-grid vis-horizontal vis-major', this.options.majorLinesOffset, this.props.majorLineWidth);
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}
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else {
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this._redrawLine(y, orientation, 'vis-grid vis-horizontal vis-minor', this.options.minorLinesOffset, this.props.minorLineWidth);
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}
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}
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// get zero crossing
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if (this.master === true && step.current === 0) {
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this.zeroCrossing = stepIndex;
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}
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step.next();
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stepIndex += 1;
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}
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// get zero crossing if it's the last step
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if (this.master === true && step.current === 0) {
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this.zeroCrossing = stepIndex;
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}
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this.conversionFactor = this.stepPixels / step.step;
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// Note that title is rotated, so we're using the height, not width!
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var titleWidth = 0;
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if (this.options.title[orientation] !== undefined && this.options.title[orientation].text !== undefined) {
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titleWidth = this.props.titleCharHeight;
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}
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var offset = this.options.icons === true ? Math.max(this.options.iconWidth, titleWidth) + this.options.labelOffsetX + 15 : titleWidth + this.options.labelOffsetX + 15;
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// this will resize the yAxis to accommodate the labels.
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if (this.maxLabelSize > (this.width - offset) && this.options.visible === true) {
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this.width = this.maxLabelSize + offset;
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this.options.width = this.width + "px";
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DOMutil.cleanupElements(this.DOMelements.lines);
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DOMutil.cleanupElements(this.DOMelements.labels);
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this.redraw();
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resized = true;
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}
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// this will resize the yAxis if it is too big for the labels.
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else if (this.maxLabelSize < (this.width - offset) && this.options.visible === true && this.width > this.minWidth) {
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this.width = Math.max(this.minWidth,this.maxLabelSize + offset);
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this.options.width = this.width + "px";
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DOMutil.cleanupElements(this.DOMelements.lines);
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DOMutil.cleanupElements(this.DOMelements.labels);
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this.redraw();
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resized = true;
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}
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else {
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DOMutil.cleanupElements(this.DOMelements.lines);
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DOMutil.cleanupElements(this.DOMelements.labels);
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resized = false;
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}
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return resized;
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};
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DataAxis.prototype.convertValue = function (value) {
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var invertedValue = this.valueAtBottom - value;
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var convertedValue = invertedValue * this.conversionFactor;
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return convertedValue;
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};
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DataAxis.prototype.screenToValue = function (x) {
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return this.valueAtBottom - (x / this.conversionFactor);
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};
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/**
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* Create a label for the axis at position x
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* @private
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* @param y
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* @param text
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* @param orientation
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* @param className
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* @param characterHeight
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*/
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DataAxis.prototype._redrawLabel = function (y, text, orientation, className, characterHeight) {
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// reuse redundant label
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var label = DOMutil.getDOMElement('div',this.DOMelements.labels, this.dom.frame); //this.dom.redundant.labels.shift();
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label.className = className;
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label.innerHTML = text;
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if (orientation === 'left') {
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label.style.left = '-' + this.options.labelOffsetX + 'px';
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label.style.textAlign = "right";
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}
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else {
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label.style.right = '-' + this.options.labelOffsetX + 'px';
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|
label.style.textAlign = "left";
|
|
}
|
|
|
|
label.style.top = y - 0.5 * characterHeight + this.options.labelOffsetY + 'px';
|
|
|
|
text += '';
|
|
|
|
var largestWidth = Math.max(this.props.majorCharWidth,this.props.minorCharWidth);
|
|
if (this.maxLabelSize < text.length * largestWidth) {
|
|
this.maxLabelSize = text.length * largestWidth;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Create a minor line for the axis at position y
|
|
* @param y
|
|
* @param orientation
|
|
* @param className
|
|
* @param offset
|
|
* @param width
|
|
*/
|
|
DataAxis.prototype._redrawLine = function (y, orientation, className, offset, width) {
|
|
if (this.master === true) {
|
|
var line = DOMutil.getDOMElement('div',this.DOMelements.lines, this.dom.lineContainer);//this.dom.redundant.lines.shift();
|
|
line.className = className;
|
|
line.innerHTML = '';
|
|
|
|
if (orientation === 'left') {
|
|
line.style.left = (this.width - offset) + 'px';
|
|
}
|
|
else {
|
|
line.style.right = (this.width - offset) + 'px';
|
|
}
|
|
|
|
line.style.width = width + 'px';
|
|
line.style.top = y + 'px';
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Create a title for the axis
|
|
* @private
|
|
* @param orientation
|
|
*/
|
|
DataAxis.prototype._redrawTitle = function (orientation) {
|
|
DOMutil.prepareElements(this.DOMelements.title);
|
|
|
|
// Check if the title is defined for this axes
|
|
if (this.options.title[orientation] !== undefined && this.options.title[orientation].text !== undefined) {
|
|
var title = DOMutil.getDOMElement('div', this.DOMelements.title, this.dom.frame);
|
|
title.className = 'vis-y-axis vis-title vis-' + orientation;
|
|
title.innerHTML = this.options.title[orientation].text;
|
|
|
|
// Add style - if provided
|
|
if (this.options.title[orientation].style !== undefined) {
|
|
util.addCssText(title, this.options.title[orientation].style);
|
|
}
|
|
|
|
if (orientation === 'left') {
|
|
title.style.left = this.props.titleCharHeight + 'px';
|
|
}
|
|
else {
|
|
title.style.right = this.props.titleCharHeight + 'px';
|
|
}
|
|
|
|
title.style.width = this.height + 'px';
|
|
}
|
|
|
|
// we need to clean up in case we did not use all elements.
|
|
DOMutil.cleanupElements(this.DOMelements.title);
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Determine the size of text on the axis (both major and minor axis).
|
|
* The size is calculated only once and then cached in this.props.
|
|
* @private
|
|
*/
|
|
DataAxis.prototype._calculateCharSize = function () {
|
|
// determine the char width and height on the minor axis
|
|
if (!('minorCharHeight' in this.props)) {
|
|
var textMinor = document.createTextNode('0');
|
|
var measureCharMinor = document.createElement('div');
|
|
measureCharMinor.className = 'vis-y-axis vis-minor vis-measure';
|
|
measureCharMinor.appendChild(textMinor);
|
|
this.dom.frame.appendChild(measureCharMinor);
|
|
|
|
this.props.minorCharHeight = measureCharMinor.clientHeight;
|
|
this.props.minorCharWidth = measureCharMinor.clientWidth;
|
|
|
|
this.dom.frame.removeChild(measureCharMinor);
|
|
}
|
|
|
|
if (!('majorCharHeight' in this.props)) {
|
|
var textMajor = document.createTextNode('0');
|
|
var measureCharMajor = document.createElement('div');
|
|
measureCharMajor.className = 'vis-y-axis vis-major vis-measure';
|
|
measureCharMajor.appendChild(textMajor);
|
|
this.dom.frame.appendChild(measureCharMajor);
|
|
|
|
this.props.majorCharHeight = measureCharMajor.clientHeight;
|
|
this.props.majorCharWidth = measureCharMajor.clientWidth;
|
|
|
|
this.dom.frame.removeChild(measureCharMajor);
|
|
}
|
|
|
|
if (!('titleCharHeight' in this.props)) {
|
|
var textTitle = document.createTextNode('0');
|
|
var measureCharTitle = document.createElement('div');
|
|
measureCharTitle.className = 'vis-y-axis vis-title vis-measure';
|
|
measureCharTitle.appendChild(textTitle);
|
|
this.dom.frame.appendChild(measureCharTitle);
|
|
|
|
this.props.titleCharHeight = measureCharTitle.clientHeight;
|
|
this.props.titleCharWidth = measureCharTitle.clientWidth;
|
|
|
|
this.dom.frame.removeChild(measureCharTitle);
|
|
}
|
|
};
|
|
|
|
module.exports = DataAxis;
|