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275 lines
6.7 KiB
275 lines
6.7 KiB
var util = require("../../util");
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var DataSet = require('../../DataSet');
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var DataView = require('../../DataView');
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import Node from "./components/Node";
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import Label from "./components/shared/Label";
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class NodesHandler {
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constructor(body, images, groups, layoutEngine) {
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this.body = body;
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this.images = images;
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this.groups = groups;
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this.layoutEngine = layoutEngine;
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// create the node API in the body container
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this.body.functions.createNode = this.create.bind(this);
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this.nodesListeners = {
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'add': (event, params) => {this.add(params.items);},
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'update': (event, params) => {this.update(params.items, params.data);},
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'remove': (event, params) => {this.remove(params.items);}
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};
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this.options = {};
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this.defaultOptions = {
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borderWidth: 1,
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borderWidthSelected: undefined,
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brokenImage:undefined,
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color: {
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border: '#2B7CE9',
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background: '#97C2FC',
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highlight: {
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border: '#2B7CE9',
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background: '#D2E5FF'
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},
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hover: {
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border: '#2B7CE9',
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background: '#D2E5FF'
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}
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},
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fixed: {
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x:false,
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y:false
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},
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font: {
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color: '#343434',
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size: 14, // px
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face: 'arial',
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background: 'none',
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stroke: 0, // px
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strokeColor: '#ffffff',
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align: 'horizontal'
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},
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group: undefined,
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hidden: false,
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icon: {
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face: 'FontAwesome', //'FontAwesome',
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code: undefined, //'\uf007',
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size: 50, //50,
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color:'#2B7CE9' //'#aa00ff'
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},
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image: undefined, // --> URL
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label: undefined,
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level: undefined,
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mass: 1,
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physics: true,
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scaling: {
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min: 10,
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max: 30,
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label: {
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enabled: false,
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min: 14,
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max: 30,
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maxVisible: 30,
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drawThreshold: 3
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},
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customScalingFunction: function (min,max,total,value) {
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if (max === min) {
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return 0.5;
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}
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else {
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var scale = 1 / (max - min);
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return Math.max(0,(value - min)*scale);
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}
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}
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},
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shadow:{
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enabled: false,
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size:10,
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x:5,
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y:5
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},
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shape: 'ellipse',
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size: 25,
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title: undefined,
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value: undefined,
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x: undefined,
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y: undefined
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};
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util.extend(this.options, this.defaultOptions);
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}
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setOptions(options) {
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if (options !== undefined) {
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Node.parseOptions(this.options, options);
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// update the shape in all nodes
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if (options.shape !== undefined) {
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for (let nodeId in this.body.nodes) {
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if (this.body.nodes.hasOwnProperty(nodeId)) {
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this.body.nodes[nodeId].updateShape();
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}
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}
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}
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// update the shape size in all nodes
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if (options.font !== undefined) {
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Label.parseOptions(this.options.font,options);
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for (let nodeId in this.body.nodes) {
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if (this.body.nodes.hasOwnProperty(nodeId)) {
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this.body.nodes[nodeId].updateLabelModule();
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this.body.nodes[nodeId]._reset();
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}
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}
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}
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// update the shape size in all nodes
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if (options.size !== undefined) {
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for (let nodeId in this.body.nodes) {
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if (this.body.nodes.hasOwnProperty(nodeId)) {
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this.body.nodes[nodeId]._reset();
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}
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}
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}
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// update the state of the variables if needed
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if (options.hidden !== undefined || options.physics !== undefined) {
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this.body.emitter.emit('_dataChanged');
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}
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}
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}
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/**
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* Set a data set with nodes for the network
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* @param {Array | DataSet | DataView} nodes The data containing the nodes.
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* @private
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*/
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setData(nodes, doNotEmit = false) {
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var oldNodesData = this.body.data.nodes;
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if (nodes instanceof DataSet || nodes instanceof DataView) {
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this.body.data.nodes = nodes;
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}
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else if (Array.isArray(nodes)) {
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this.body.data.nodes = new DataSet();
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this.body.data.nodes.add(nodes);
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}
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else if (!nodes) {
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this.body.data.nodes = new DataSet();
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}
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else {
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throw new TypeError('Array or DataSet expected');
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}
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if (oldNodesData) {
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// unsubscribe from old dataset
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util.forEach(this.nodesListeners, function (callback, event) {
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oldNodesData.off(event, callback);
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});
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}
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// remove drawn nodes
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this.body.nodes = {};
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if (this.body.data.nodes) {
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// subscribe to new dataset
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var me = this;
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util.forEach(this.nodesListeners, function (callback, event) {
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me.body.data.nodes.on(event, callback);
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});
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// draw all new nodes
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var ids = this.body.data.nodes.getIds();
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this.add(ids, true);
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}
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if (doNotEmit === false) {
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this.body.emitter.emit("_dataChanged");
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}
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}
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/**
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* Add nodes
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* @param {Number[] | String[]} ids
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* @private
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*/
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add(ids, doNotEmit = false) {
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var id;
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var newNodes = [];
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for (var i = 0; i < ids.length; i++) {
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id = ids[i];
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var properties = this.body.data.nodes.get(id);
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var node = this.create(properties);;
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newNodes.push(node);
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this.body.nodes[id] = node; // note: this may replace an existing node
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}
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this.layoutEngine.positionInitially(newNodes);
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if (doNotEmit === false) {
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this.body.emitter.emit("_dataChanged");
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}
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}
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/**
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* Update existing nodes, or create them when not yet existing
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* @param {Number[] | String[]} ids
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* @private
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*/
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update(ids, changedData) {
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var nodes = this.body.nodes;
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var dataChanged = false;
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for (var i = 0; i < ids.length; i++) {
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var id = ids[i];
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var node = nodes[id];
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var data = changedData[i];
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if (node !== undefined) {
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// update node
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node.setOptions(data, this.constants);
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}
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else {
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dataChanged = true;
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// create node
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node = this.create(properties);
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nodes[id] = node;
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}
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}
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if (dataChanged === true) {
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this.body.emitter.emit("_dataChanged");
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}
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else {
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this.body.emitter.emit("_dataUpdated");
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}
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}
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/**
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* Remove existing nodes. If nodes do not exist, the method will just ignore it.
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* @param {Number[] | String[]} ids
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* @private
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*/
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remove(ids) {
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var nodes = this.body.nodes;
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for (let i = 0; i < ids.length; i++) {
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var id = ids[i];
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delete nodes[id];
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}
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this.body.emitter.emit("_dataChanged");
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}
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create(properties, constructorClass = Node) {
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return new constructorClass(properties, this.body, this.images, this.groups, this.options)
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}
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}
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export default NodesHandler;
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