vis.js is a dynamic, browser-based visualization library
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var util = require("../../util");
var DataSet = require('../../DataSet');
var DataView = require('../../DataView');
import Edge from "./components/Edge"
import Label from "./components/shared/Label"
class EdgesHandler {
constructor(body, images, groups) {
this.body = body;
this.images = images;
this.groups = groups;
// create the edge API in the body container
this.body.functions.createEdge = this.create.bind(this);
this.edgesListeners = {
add: (event, params) => {this.add(params.items);},
update: (event, params) => {this.update(params.items);},
remove: (event, params) => {this.remove(params.items);}
};
this.options = {};
this.defaultOptions = {
arrows: {
to: {enabled: false, scaleFactor:1}, // boolean / {arrowScaleFactor:1} / {enabled: false, arrowScaleFactor:1}
middle: {enabled: false, scaleFactor:1},
from: {enabled: false, scaleFactor:1}
},
color: {
color:'#848484',
highlight:'#848484',
hover: '#848484',
inherit: 'from',
opacity:1.0
},
dashes: false,
font: {
color: '#343434',
size: 14, // px
face: 'arial',
background: 'none',
strokeWidth: 2, // px
strokeColor: '#ffffff',
align:'horizontal'
},
hidden: false,
hoverWidth: 1.5,
label: undefined,
labelHighlightBold: true,
length: undefined,
physics: true,
scaling:{
min: 1,
max: 15,
label: {
enabled: true,
min: 14,
max: 30,
maxVisible: 30,
drawThreshold: 5
},
customScalingFunction: function (min,max,total,value) {
if (max === min) {
return 0.5;
}
else {
var scale = 1 / (max - min);
return Math.max(0,(value - min)*scale);
}
}
},
selectionWidth: 1.5,
selfReferenceSize:20,
shadow:{
enabled: false,
size:10,
x:5,
y:5
},
smooth: {
enabled: true,
type: "dynamic",
roundness: 0.5
},
title:undefined,
width: 1,
value: undefined
};
util.extend(this.options, this.defaultOptions);
this.bindEventListeners();
}
bindEventListeners() {
// this allows external modules to force all dynamic curves to turn static.
this.body.emitter.on("_forceDisableDynamicCurves", (type) => {
if (type === 'dynamic') {
type = 'continuous';
}
let emitChange = false;
for (let edgeId in this.body.edges) {
if (this.body.edges.hasOwnProperty(edgeId)) {
let edge = this.body.edges[edgeId];
let edgeData = this.body.data.edges._data[edgeId];
// only forcilby remove the smooth curve if the data has been set of the edge has the smooth curves defined.
// this is because a change in the global would not affect these curves.
if (edgeData !== undefined) {
let edgeOptions = edgeData.smooth;
if (edgeOptions !== undefined) {
if (edgeOptions.enabled === true && edgeOptions.type === 'dynamic') {
if (type === undefined) {
edge.setOptions({smooth: false});
}
else {
edge.setOptions({smooth: {type: type}});
}
emitChange = true;
}
}
}
}
}
if (emitChange === true) {
this.body.emitter.emit("_dataChanged");
}
});
// this is called when options of EXISTING nodes or edges have changed.
this.body.emitter.on("_dataUpdated", () => {
this.reconnectEdges();
this.markAllEdgesAsDirty();
});
// refresh the edges. Used when reverting from hierarchical layout
this.body.emitter.on("refreshEdges", this.refresh.bind(this));
this.body.emitter.on("refresh", this.refresh.bind(this));
this.body.emitter.on("destroy", () => {
delete this.body.functions.createEdge;
delete this.edgesListeners.add;
delete this.edgesListeners.update;
delete this.edgesListeners.remove;
delete this.edgesListeners;
});
}
setOptions(options) {
if (options !== undefined) {
// use the parser from the Edge class to fill in all shorthand notations
Edge.parseOptions(this.options, options);
// hanlde multiple input cases for color
if (options.color !== undefined) {
this.markAllEdgesAsDirty();
}
// update smooth settings in all edges
let dataChanged = false;
if (options.smooth !== undefined) {
for (let edgeId in this.body.edges) {
if (this.body.edges.hasOwnProperty(edgeId)) {
dataChanged = this.body.edges[edgeId].updateEdgeType() || dataChanged;
}
}
}
// update fonts in all edges
if (options.font !== undefined) {
// use the parser from the Label class to fill in all shorthand notations
Label.parseOptions(this.options.font, options);
for (let edgeId in this.body.edges) {
if (this.body.edges.hasOwnProperty(edgeId)) {
this.body.edges[edgeId].updateLabelModule();
}
}
}
// update the state of the variables if needed
if (options.hidden !== undefined || options.physics !== undefined || dataChanged === true) {
this.body.emitter.emit('_dataChanged');
}
}
}
/**
* Load edges by reading the data table
* @param {Array | DataSet | DataView} edges The data containing the edges.
* @private
* @private
*/
setData(edges, doNotEmit = false) {
var oldEdgesData = this.body.data.edges;
if (edges instanceof DataSet || edges instanceof DataView) {
this.body.data.edges = edges;
}
else if (Array.isArray(edges)) {
this.body.data.edges = new DataSet();
this.body.data.edges.add(edges);
}
else if (!edges) {
this.body.data.edges = new DataSet();
}
else {
throw new TypeError('Array or DataSet expected');
}
// TODO: is this null or undefined or false?
if (oldEdgesData) {
// unsubscribe from old dataset
util.forEach(this.edgesListeners, (callback, event) => {oldEdgesData.off(event, callback);});
}
// remove drawn edges
this.body.edges = {};
// TODO: is this null or undefined or false?
if (this.body.data.edges) {
// subscribe to new dataset
util.forEach(this.edgesListeners, (callback, event) => {this.body.data.edges.on(event, callback);});
// draw all new nodes
var ids = this.body.data.edges.getIds();
this.add(ids, true);
}
if (doNotEmit === false) {
this.body.emitter.emit("_dataChanged");
}
}
/**
* Add edges
* @param {Number[] | String[]} ids
* @private
*/
add(ids, doNotEmit = false) {
var edges = this.body.edges;
var edgesData = this.body.data.edges;
for (let i = 0; i < ids.length; i++) {
var id = ids[i];
var oldEdge = edges[id];
if (oldEdge) {
oldEdge.disconnect();
}
var data = edgesData.get(id, {"showInternalIds" : true});
edges[id] = this.create(data);
}
if (doNotEmit === false) {
this.body.emitter.emit("_dataChanged");
}
}
/**
* Update existing edges, or create them when not yet existing
* @param {Number[] | String[]} ids
* @private
*/
update(ids) {
var edges = this.body.edges;
var edgesData = this.body.data.edges;
var dataChanged = false;
for (var i = 0; i < ids.length; i++) {
var id = ids[i];
var data = edgesData.get(id);
var edge = edges[id];
if (edge !== undefined) {
// update edge
edge.disconnect();
dataChanged = edge.setOptions(data) || dataChanged; // if a support node is added, data can be changed.
edge.connect();
}
else {
// create edge
this.body.edges[id] = this.create(data);
dataChanged = true;
}
}
if (dataChanged === true) {
this.body.emitter.emit("_dataChanged");
}
else {
this.body.emitter.emit("_dataUpdated");
}
}
/**
* Remove existing edges. Non existing ids will be ignored
* @param {Number[] | String[]} ids
* @private
*/
remove(ids) {
var edges = this.body.edges;
for (var i = 0; i < ids.length; i++) {
var id = ids[i];
var edge = edges[id];
if (edge !== undefined) {
edge.edgeType.cleanup();
edge.disconnect();
delete edges[id];
}
}
this.body.emitter.emit("_dataChanged");
}
refresh() {
let edges = this.body.edges;
for (let edgeId in edges) {
let edge = undefined;
if (edges.hasOwnProperty(edgeId)) {
edge = edges[edgeId];
}
let data = this.body.data.edges._data[edgeId];
if (edge !== undefined && data !== undefined) {
edge.setOptions(data);
}
}
}
create(properties) {
return new Edge(properties, this.body, this.options)
}
markAllEdgesAsDirty() {
for (var edgeId in this.body.edges) {
this.body.edges[edgeId].edgeType.colorDirty = true;
}
}
/**
* Reconnect all edges
* @private
*/
reconnectEdges() {
var id;
var nodes = this.body.nodes;
var edges = this.body.edges;
for (id in nodes) {
if (nodes.hasOwnProperty(id)) {
nodes[id].edges = [];
}
}
for (id in edges) {
if (edges.hasOwnProperty(id)) {
var edge = edges[id];
edge.from = null;
edge.to = null;
edge.connect();
}
}
}
getConnectedNodes(edgeId) {
let nodeList = [];
if (this.body.edges[edgeId] !== undefined) {
let edge = this.body.edges[edgeId];
if (edge.fromId) {nodeList.push(edge.fromId);}
if (edge.toId) {nodeList.push(edge.toId);}
}
return nodeList;
}
}
export default EdgesHandler;