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158 lines
5.3 KiB
158 lines
5.3 KiB
var util = require('../../util');
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var DOMutil = require('../../DOMutil');
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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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/**
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* /**
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* @param {object} group | the object of the group from the dataset
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* @param {string} groupId | ID of the group
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* @param {object} options | the default options
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* @param {array} groupsUsingDefaultStyles | this array has one entree.
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* It is passed as an array so it is passed by reference.
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* It enumerates through the default styles
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* @constructor
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*/
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function GraphGroup(group, groupId, options, groupsUsingDefaultStyles) {
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this.id = groupId;
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var fields = ['sampling', 'style', 'sort', 'yAxisOrientation', 'barChart', 'drawPoints', 'shaded', 'interpolation', 'zIndex','excludeFromStacking', 'excludeFromLegend'];
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this.options = util.selectiveBridgeObject(fields, options);
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this.usingDefaultStyle = group.className === undefined;
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this.groupsUsingDefaultStyles = groupsUsingDefaultStyles;
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this.zeroPosition = 0;
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this.update(group);
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if (this.usingDefaultStyle == true) {
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this.groupsUsingDefaultStyles[0] += 1;
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}
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this.itemsData = [];
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this.visible = group.visible === undefined ? true : group.visible;
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}
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/**
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* this loads a reference to all items in this group into this group.
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* @param {array} items
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*/
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GraphGroup.prototype.setItems = function (items) {
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if (items != null) {
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this.itemsData = items;
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if (this.options.sort == true) {
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util.insertSort(this.itemsData,function (a, b) {
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return a.x > b.x ? 1 : -1;
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});
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}
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}
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else {
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this.itemsData = [];
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}
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};
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GraphGroup.prototype.getItems = function () {
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return this.itemsData;
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}
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/**
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* this is used for barcharts and shading, this way, we only have to calculate it once.
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* @param pos
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*/
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GraphGroup.prototype.setZeroPosition = function (pos) {
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this.zeroPosition = pos;
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};
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/**
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* set the options of the graph group over the default options.
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* @param options
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*/
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GraphGroup.prototype.setOptions = function (options) {
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if (options !== undefined) {
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var fields = ['sampling', 'style', 'sort', 'yAxisOrientation', 'barChart', 'zIndex','excludeFromStacking', 'excludeFromLegend'];
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util.selectiveDeepExtend(fields, this.options, options);
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// if the group's drawPoints is a function delegate the callback to the onRender property
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if (typeof options.drawPoints == 'function') {
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options.drawPoints = {
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onRender: options.drawPoints
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}
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}
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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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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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}
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};
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/**
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* this updates the current group class with the latest group dataset entree, used in _updateGroup in linegraph
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* @param group
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*/
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GraphGroup.prototype.update = function (group) {
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this.group = group;
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this.content = group.content || 'graph';
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this.className = group.className || this.className || 'vis-graph-group' + this.groupsUsingDefaultStyles[0] % 10;
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this.visible = group.visible === undefined ? true : group.visible;
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this.style = group.style;
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this.setOptions(group.options);
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};
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/**
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* return the legend entree for this group.
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*
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* @param iconWidth
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* @param iconHeight
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* @returns {{icon: HTMLElement, label: (group.content|*|string), orientation: (.options.yAxisOrientation|*)}}
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*/
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GraphGroup.prototype.getLegend = function (iconWidth, iconHeight, framework, x, y) {
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if (framework == undefined || framework == null) {
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var svg = document.createElementNS('http://www.w3.org/2000/svg', "svg");
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framework = {svg: svg, svgElements:{}, options: this.options, groups: [this]}
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}
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if (x == undefined || x == null){
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x = 0;
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}
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if (y == undefined || y == null){
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y = 0.5 * iconHeight;
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}
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switch (this.options.style){
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case "line":
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Lines.drawIcon(this, x, y, iconWidth, iconHeight, framework);
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break;
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case "points": //explicit no break
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case "point":
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Points.drawIcon(this, x, y, iconWidth, iconHeight, framework);
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break;
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case "bar":
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Bars.drawIcon(this, x, y, iconWidth, iconHeight, framework);
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break;
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}
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return {icon: framework.svg, label: this.content, orientation: this.options.yAxisOrientation};
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};
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GraphGroup.prototype.getYRange = function (groupData) {
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var yMin = groupData[0].y;
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var yMax = groupData[0].y;
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for (var j = 0; j < groupData.length; j++) {
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yMin = yMin > groupData[j].y ? groupData[j].y : yMin;
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yMax = yMax < groupData[j].y ? groupData[j].y : yMax;
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}
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return {min: yMin, max: yMax, yAxisOrientation: this.options.yAxisOrientation};
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};
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module.exports = GraphGroup;
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