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214 lines
6.8 KiB
214 lines
6.8 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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/**
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* Legend for Graph2d
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*/
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function Legend(body, options, side, linegraphOptions) {
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this.body = body;
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this.defaultOptions = {
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enabled: true,
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icons: true,
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iconSize: 20,
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iconSpacing: 6,
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left: {
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visible: true,
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position: 'top-left' // top/bottom - left,center,right
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},
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right: {
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visible: true,
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position: 'top-left' // top/bottom - left,center,right
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}
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}
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this.side = side;
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this.options = util.extend({},this.defaultOptions);
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this.linegraphOptions = linegraphOptions;
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this.svgElements = {};
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this.dom = {};
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this.groups = {};
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this.amountOfGroups = 0;
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this._create();
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this.setOptions(options);
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}
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Legend.prototype = new Component();
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Legend.prototype.clear = function() {
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this.groups = {};
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this.amountOfGroups = 0;
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};
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Legend.prototype.addGroup = function(label, graphOptions) {
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// Include a group only if the group option 'excludeFromLegend: false' is not set.
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if (graphOptions.options.excludeFromLegend != true) {
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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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};
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Legend.prototype.updateGroup = function(label, graphOptions) {
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this.groups[label] = graphOptions;
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};
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Legend.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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Legend.prototype._create = function() {
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this.dom.frame = document.createElement('div');
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this.dom.frame.className = 'vis-legend';
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this.dom.frame.style.position = "absolute";
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this.dom.frame.style.top = "10px";
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this.dom.frame.style.display = "block";
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this.dom.textArea = document.createElement('div');
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this.dom.textArea.className = 'vis-legend-text';
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this.dom.textArea.style.position = "relative";
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this.dom.textArea.style.top = "0px";
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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 = 0 +'px';
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this.svg.style.width = this.options.iconSize + 5 + 'px';
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this.svg.style.height = '100%';
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this.dom.frame.appendChild(this.svg);
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this.dom.frame.appendChild(this.dom.textArea);
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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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Legend.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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Legend.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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Legend.prototype.setOptions = function(options) {
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var fields = ['enabled','orientation','icons','left','right'];
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util.selectiveDeepExtend(fields, this.options, options);
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};
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Legend.prototype.redraw = function() {
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var activeGroups = 0;
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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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activeGroups++;
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}
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}
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if (this.options[this.side].visible == false || this.amountOfGroups == 0 || this.options.enabled == false || 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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if (this.options[this.side].position == 'top-left' || this.options[this.side].position == 'bottom-left') {
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this.dom.frame.style.left = '4px';
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this.dom.frame.style.textAlign = "left";
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this.dom.textArea.style.textAlign = "left";
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this.dom.textArea.style.left = (this.options.iconSize + 15) + 'px';
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this.dom.textArea.style.right = '';
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this.svg.style.left = 0 +'px';
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this.svg.style.right = '';
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}
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else {
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this.dom.frame.style.right = '4px';
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this.dom.frame.style.textAlign = "right";
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this.dom.textArea.style.textAlign = "right";
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this.dom.textArea.style.right = (this.options.iconSize + 15) + 'px';
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this.dom.textArea.style.left = '';
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this.svg.style.right = 0 +'px';
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this.svg.style.left = '';
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}
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if (this.options[this.side].position == 'top-left' || this.options[this.side].position == 'top-right') {
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this.dom.frame.style.top = 4 - Number(this.body.dom.center.style.top.replace("px","")) + 'px';
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this.dom.frame.style.bottom = '';
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}
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else {
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var scrollableHeight = this.body.domProps.center.height - this.body.domProps.centerContainer.height;
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this.dom.frame.style.bottom = 4 + scrollableHeight + Number(this.body.dom.center.style.top.replace("px","")) + 'px';
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this.dom.frame.style.top = '';
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}
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if (this.options.icons == false) {
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this.dom.frame.style.width = this.dom.textArea.offsetWidth + 10 + 'px';
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this.dom.textArea.style.right = '';
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this.dom.textArea.style.left = '';
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this.svg.style.width = '0px';
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}
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else {
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this.dom.frame.style.width = this.options.iconSize + 15 + this.dom.textArea.offsetWidth + 10 + 'px'
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this.drawLegendIcons();
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}
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var content = '';
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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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content += this.groups[groupId].content + '<br />';
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}
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}
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this.dom.textArea.innerHTML = content;
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this.dom.textArea.style.lineHeight = ((0.75 * this.options.iconSize) + this.options.iconSpacing) + 'px';
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}
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};
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Legend.prototype.drawLegendIcons = function() {
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if (this.dom.frame.parentNode) {
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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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// this resets the elements so the order is maintained
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DOMutil.resetElements(this.svgElements);
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var padding = window.getComputedStyle(this.dom.frame).paddingTop;
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var iconOffset = Number(padding.replace('px',''));
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var x = iconOffset;
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var iconWidth = this.options.iconSize;
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var iconHeight = 0.75 * this.options.iconSize;
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var y = iconOffset + 0.5 * iconHeight + 3;
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this.svg.style.width = iconWidth + 5 + iconOffset + 'px';
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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 + this.options.iconSpacing;
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}
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}
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}
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};
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module.exports = Legend;
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