var Emitter = require('emitter-component'); var Hammer = require('../module/hammer'); var keycharm = require('keycharm'); var util = require('../util'); var hammerUtil = require('../hammerUtil'); var DataSet = require('../DataSet'); var DataView = require('../DataView'); var dotparser = require('./dotparser'); var gephiParser = require('./gephiParser'); var Groups = require('./Groups'); var Images = require('./Images'); var Node = require('./Node'); var Edge = require('./Edge'); var Popup = require('./Popup'); var MixinLoader = require('./mixins/MixinLoader'); var Activator = require('../shared/Activator'); var locales = require('./locales'); // Load custom shapes into CanvasRenderingContext2D require('./shapes'); /** * @constructor Network * Create a network visualization, displaying nodes and edges. * * @param {Element} container The DOM element in which the Network will * be created. Normally a div element. * @param {Object} data An object containing parameters * {Array} nodes * {Array} edges * @param {Object} options Options */ function Network (container, data, options) { if (!(this instanceof Network)) { throw new SyntaxError('Constructor must be called with the new operator'); } this._initializeMixinLoaders(); // create variables and set default values this.containerElement = container; // render and calculation settings this.renderRefreshRate = 60; // hz (fps) this.renderTimestep = 1000 / this.renderRefreshRate; // ms -- saves calculation later on this.renderTime = 0.5 * this.renderTimestep; // measured time it takes to render a frame this.maxPhysicsTicksPerRender = 3; // max amount of physics ticks per render step. this.physicsDiscreteStepsize = 0.50; // discrete stepsize of the simulation this.initializing = true; this.triggerFunctions = {add:null,edit:null,editEdge:null,connect:null,del:null}; // set constant values this.defaultOptions = { nodes: { mass: 1, radiusMin: 10, radiusMax: 30, radius: 10, shape: 'ellipse', image: undefined, widthMin: 16, // px widthMax: 64, // px fontColor: 'black', fontSize: 14, // px fontFace: 'verdana', fontFill: undefined, level: -1, color: { border: '#2B7CE9', background: '#97C2FC', highlight: { border: '#2B7CE9', background: '#D2E5FF' }, hover: { border: '#2B7CE9', background: '#D2E5FF' } }, borderColor: '#2B7CE9', backgroundColor: '#97C2FC', highlightColor: '#D2E5FF', group: undefined, borderWidth: 1, borderWidthSelected: undefined }, edges: { widthMin: 1, // widthMax: 15,// width: 1, widthSelectionMultiplier: 2, hoverWidth: 1.5, style: 'line', color: { color:'#848484', highlight:'#848484', hover: '#848484' }, fontColor: '#343434', fontSize: 14, // px fontFace: 'arial', fontFill: 'white', arrowScaleFactor: 1, dash: { length: 10, gap: 5, altLength: undefined }, inheritColor: "from" // to, from, false, true (== from) }, configurePhysics:false, physics: { barnesHut: { enabled: true, theta: 1 / 0.6, // inverted to save time during calculation gravitationalConstant: -2000, centralGravity: 0.3, springLength: 95, springConstant: 0.04, damping: 0.09 }, repulsion: { centralGravity: 0.0, springLength: 200, springConstant: 0.05, nodeDistance: 100, damping: 0.09 }, hierarchicalRepulsion: { enabled: false, centralGravity: 0.0, springLength: 100, springConstant: 0.01, nodeDistance: 150, damping: 0.09 }, damping: null, centralGravity: null, springLength: null, springConstant: null }, clustering: { // Per Node in Cluster = PNiC enabled: false, // (Boolean) | global on/off switch for clustering. initialMaxNodes: 100, // (# nodes) | if the initial amount of nodes is larger than this, we cluster until the total number is less than this threshold. clusterThreshold:500, // (# nodes) | during calculate forces, we check if the total number of nodes is larger than this. If it is, cluster until reduced to reduceToNodes reduceToNodes:300, // (# nodes) | during calculate forces, we check if the total number of nodes is larger than clusterThreshold. If it is, cluster until reduced to this chainThreshold: 0.4, // (% of all drawn nodes)| maximum percentage of allowed chainnodes (long strings of connected nodes) within all nodes. (lower means less chains). clusterEdgeThreshold: 20, // (px) | edge length threshold. if smaller, this node is clustered. sectorThreshold: 100, // (# nodes in cluster) | cluster size threshold. If larger, expanding in own sector. screenSizeThreshold: 0.2, // (% of canvas) | relative size threshold. If the width or height of a clusternode takes up this much of the screen, decluster node. fontSizeMultiplier: 4.0, // (px PNiC) | how much the cluster font size grows per node in cluster (in px). maxFontSize: 1000, forceAmplification: 0.1, // (multiplier PNiC) | factor of increase fo the repulsion force of a cluster (per node in cluster). distanceAmplification: 0.1, // (multiplier PNiC) | factor how much the repulsion distance of a cluster increases (per node in cluster). edgeGrowth: 20, // (px PNiC) | amount of clusterSize connected to the edge is multiplied with this and added to edgeLength. nodeScaling: {width: 1, // (px PNiC) | growth of the width per node in cluster. height: 1, // (px PNiC) | growth of the height per node in cluster. radius: 1}, // (px PNiC) | growth of the radius per node in cluster. maxNodeSizeIncrements: 600, // (# increments) | max growth of the width per node in cluster. activeAreaBoxSize: 80, // (px) | box area around the curser where clusters are popped open. clusterLevelDifference: 2 }, navigation: { enabled: false }, keyboard: { enabled: false, speed: {x: 10, y: 10, zoom: 0.02} }, dataManipulation: { enabled: false, initiallyVisible: false }, hierarchicalLayout: { enabled:false, levelSeparation: 150, nodeSpacing: 100, direction: "UD", // UD, DU, LR, RL layout: "hubsize" // hubsize, directed }, freezeForStabilization: false, smoothCurves: { enabled: true, dynamic: true, type: "continuous", roundness: 0.5 }, maxVelocity: 30, minVelocity: 0.1, // px/s stabilize: true, // stabilize before displaying the network stabilizationIterations: 1000, // maximum number of iteration to stabilize locale: 'en', locales: locales, tooltip: { delay: 300, fontColor: 'black', fontSize: 14, // px fontFace: 'verdana', color: { border: '#666', background: '#FFFFC6' } }, dragNetwork: true, dragNodes: true, zoomable: true, hover: false, hideEdgesOnDrag: false, hideNodesOnDrag: false, width : '100%', height : '100%', selectable: true }; this.constants = util.extend({}, this.defaultOptions); this.pixelRatio = 1; this.hoverObj = {nodes:{},edges:{}}; this.controlNodesActive = false; this.navigationHammers = {existing:[], new: []}; // animation properties this.animationSpeed = 1/this.renderRefreshRate; this.animationEasingFunction = "easeInOutQuint"; this.easingTime = 0; this.sourceScale = 0; this.targetScale = 0; this.sourceTranslation = 0; this.targetTranslation = 0; this.lockedOnNodeId = null; this.lockedOnNodeOffset = null; // Node variables var network = this; this.groups = new Groups(); // object with groups this.images = new Images(); // object with images this.images.setOnloadCallback(function () { network._redraw(); }); // keyboard navigation variables this.xIncrement = 0; this.yIncrement = 0; this.zoomIncrement = 0; // loading all the mixins: // load the force calculation functions, grouped under the physics system. this._loadPhysicsSystem(); // create a frame and canvas this._create(); // load the sector system. (mandatory, fully integrated with Network) this._loadSectorSystem(); // load the cluster system. (mandatory, even when not using the cluster system, there are function calls to it) this._loadClusterSystem(); // load the selection system. (mandatory, required by Network) this._loadSelectionSystem(); // load the selection system. (mandatory, required by Network) this._loadHierarchySystem(); // apply options this._setTranslation(this.frame.clientWidth / 2, this.frame.clientHeight / 2); this._setScale(1); this.setOptions(options); // other vars this.freezeSimulation = false;// freeze the simulation this.cachedFunctions = {}; this.startedStabilization = false; this.stabilized = false; this.stabilizationIterations = null; this.draggingNodes = false; // containers for nodes and edges this.calculationNodes = {}; this.calculationNodeIndices = []; this.nodeIndices = []; // array with all the indices of the nodes. Used to speed up forces calculation this.nodes = {}; // object with Node objects this.edges = {}; // object with Edge objects // position and scale variables and objects this.canvasTopLeft = {"x": 0,"y": 0}; // coordinates of the top left of the canvas. they will be set during _redraw. this.canvasBottomRight = {"x": 0,"y": 0}; // coordinates of the bottom right of the canvas. they will be set during _redraw this.pointerPosition = {"x": 0,"y": 0}; // coordinates of the bottom right of the canvas. they will be set during _redraw this.areaCenter = {}; // object with x and y elements used for determining the center of the zoom action this.scale = 1; // defining the global scale variable in the constructor this.previousScale = this.scale; // this is used to check if the zoom operation is zooming in or out // datasets or dataviews this.nodesData = null; // A DataSet or DataView this.edgesData = null; // A DataSet or DataView // create event listeners used to subscribe on the DataSets of the nodes and edges this.nodesListeners = { 'add': function (event, params) { network._addNodes(params.items); network.start(); }, 'update': function (event, params) { network._updateNodes(params.items, params.data); network.start(); }, 'remove': function (event, params) { network._removeNodes(params.items); network.start(); } }; this.edgesListeners = { 'add': function (event, params) { network._addEdges(params.items); network.start(); }, 'update': function (event, params) { network._updateEdges(params.items); network.start(); }, 'remove': function (event, params) { network._removeEdges(params.items); network.start(); } }; // properties for the animation this.moving = true; this.timer = undefined; // Scheduling function. Is definded in this.start(); // load data (the disable start variable will be the same as the enabled clustering) this.setData(data,this.constants.clustering.enabled || this.constants.hierarchicalLayout.enabled); // hierarchical layout this.initializing = false; if (this.constants.hierarchicalLayout.enabled == true) { this._setupHierarchicalLayout(); } else { // zoom so all data will fit on the screen, if clustering is enabled, we do not want start to be called here. if (this.constants.stabilize == false) { this.zoomExtent(undefined, true,this.constants.clustering.enabled); } } // if clustering is disabled, the simulation will have started in the setData function if (this.constants.clustering.enabled) { this.startWithClustering(); } } // Extend Network with an Emitter mixin Emitter(Network.prototype); /** * Get the script path where the vis.js library is located * * @returns {string | null} path Path or null when not found. Path does not * end with a slash. * @private */ Network.prototype._getScriptPath = function() { var scripts = document.getElementsByTagName( 'script' ); // find script named vis.js or vis.min.js for (var i = 0; i < scripts.length; i++) { var src = scripts[i].src; var match = src && /\/?vis(.min)?\.js$/.exec(src); if (match) { // return path without the script name return src.substring(0, src.length - match[0].length); } } return null; }; /** * Find the center position of the network * @private */ Network.prototype._getRange = function() { var minY = 1e9, maxY = -1e9, minX = 1e9, maxX = -1e9, node; for (var nodeId in this.nodes) { if (this.nodes.hasOwnProperty(nodeId)) { node = this.nodes[nodeId]; if (minX > (node.x)) {minX = node.x;} if (maxX < (node.x)) {maxX = node.x;} if (minY > (node.y)) {minY = node.y;} if (maxY < (node.y)) {maxY = node.y;} } } if (minX == 1e9 && maxX == -1e9 && minY == 1e9 && maxY == -1e9) { minY = 0, maxY = 0, minX = 0, maxX = 0; } return {minX: minX, maxX: maxX, minY: minY, maxY: maxY}; }; /** * @param {object} range = {minX: minX, maxX: maxX, minY: minY, maxY: maxY}; * @returns {{x: number, y: number}} * @private */ Network.prototype._findCenter = function(range) { return {x: (0.5 * (range.maxX + range.minX)), y: (0.5 * (range.maxY + range.minY))}; }; /** * This function zooms out to fit all data on screen based on amount of nodes * * @param {Boolean} [initialZoom] | zoom based on fitted formula or range, true = fitted, default = false; * @param {Boolean} [disableStart] | If true, start is not called. */ Network.prototype.zoomExtent = function(animationOptions, initialZoom, disableStart) { if (initialZoom === undefined) { initialZoom = false; } if (disableStart === undefined) { disableStart = false; } if (animationOptions === undefined) { animationOptions = false; } var range = this._getRange(); var zoomLevel; if (initialZoom == true) { var numberOfNodes = this.nodeIndices.length; if (this.constants.smoothCurves == true) { if (this.constants.clustering.enabled == true && numberOfNodes >= this.constants.clustering.initialMaxNodes) { zoomLevel = 49.07548 / (numberOfNodes + 142.05338) + 9.1444e-04; // this is obtained from fitting a dataset from 5 points with scale levels that looked good. } else { zoomLevel = 12.662 / (numberOfNodes + 7.4147) + 0.0964822; // this is obtained from fitting a dataset from 5 points with scale levels that looked good. } } else { if (this.constants.clustering.enabled == true && numberOfNodes >= this.constants.clustering.initialMaxNodes) { zoomLevel = 77.5271985 / (numberOfNodes + 187.266146) + 4.76710517e-05; // this is obtained from fitting a dataset from 5 points with scale levels that looked good. } else { zoomLevel = 30.5062972 / (numberOfNodes + 19.93597763) + 0.08413486; // this is obtained from fitting a dataset from 5 points with scale levels that looked good. } } // correct for larger canvasses. var factor = Math.min(this.frame.canvas.clientWidth / 600, this.frame.canvas.clientHeight / 600); zoomLevel *= factor; } else { var xDistance = Math.abs(range.maxX - range.minX) * 1.1; var yDistance = Math.abs(range.maxY - range.minY) * 1.1; var xZoomLevel = this.frame.canvas.clientWidth / xDistance; var yZoomLevel = this.frame.canvas.clientHeight / yDistance; zoomLevel = (xZoomLevel <= yZoomLevel) ? xZoomLevel : yZoomLevel; } if (zoomLevel > 1.0) { zoomLevel = 1.0; } var center = this._findCenter(range); if (disableStart == false) { var options = {position: center, scale: zoomLevel, animation: animationOptions}; this.moveTo(options); this.moving = true; this.start(); } else { center.x *= zoomLevel; center.y *= zoomLevel; center.x -= 0.5 * this.frame.canvas.clientWidth; center.y -= 0.5 * this.frame.canvas.clientHeight; this._setScale(zoomLevel); this._setTranslation(-center.x,-center.y); } }; /** * Update the this.nodeIndices with the most recent node index list * @private */ Network.prototype._updateNodeIndexList = function() { this._clearNodeIndexList(); for (var idx in this.nodes) { if (this.nodes.hasOwnProperty(idx)) { this.nodeIndices.push(idx); } } }; /** * Set nodes and edges, and optionally options as well. * * @param {Object} data Object containing parameters: * {Array | DataSet | DataView} [nodes] Array with nodes * {Array | DataSet | DataView} [edges] Array with edges * {String} [dot] String containing data in DOT format * {String} [gephi] String containing data in gephi JSON format * {Options} [options] Object with options * @param {Boolean} [disableStart] | optional: disable the calling of the start function. */ Network.prototype.setData = function(data, disableStart) { if (disableStart === undefined) { disableStart = false; } // we set initializing to true to ensure that the hierarchical layout is not performed until both nodes and edges are added. this.initializing = true; if (data && data.dot && (data.nodes || data.edges)) { throw new SyntaxError('Data must contain either parameter "dot" or ' + ' parameter pair "nodes" and "edges", but not both.'); } // set options this.setOptions(data && data.options); // set all data if (data && data.dot) { // parse DOT file if(data && data.dot) { var dotData = dotparser.DOTToGraph(data.dot); this.setData(dotData); return; } } else if (data && data.gephi) { // parse DOT file if(data && data.gephi) { var gephiData = gephiParser.parseGephi(data.gephi); this.setData(gephiData); return; } } else { this._setNodes(data && data.nodes); this._setEdges(data && data.edges); } this._putDataInSector(); if (disableStart == false) { if (this.constants.hierarchicalLayout.enabled == true) { this._resetLevels(); this._setupHierarchicalLayout(); } else { // find a stable position or start animating to a stable position if (this.constants.stabilize) { this._stabilize(); } } this.start(); } this.initializing = false; }; /** * Set options * @param {Object} options */ Network.prototype.setOptions = function (options) { if (options) { var prop; var fields = ['nodes','edges','smoothCurves','hierarchicalLayout','clustering','navigation', 'keyboard','dataManipulation','onAdd','onEdit','onEditEdge','onConnect','onDelete','clickToUse' ]; // extend all but the values in fields util.selectiveNotDeepExtend(fields,this.constants, options); util.selectiveNotDeepExtend(['color'],this.constants.nodes, options.nodes); util.selectiveNotDeepExtend(['color','length'],this.constants.edges, options.edges); if (options.physics) { util.mergeOptions(this.constants.physics, options.physics,'barnesHut'); util.mergeOptions(this.constants.physics, options.physics,'repulsion'); if (options.physics.hierarchicalRepulsion) { this.constants.hierarchicalLayout.enabled = true; this.constants.physics.hierarchicalRepulsion.enabled = true; this.constants.physics.barnesHut.enabled = false; for (prop in options.physics.hierarchicalRepulsion) { if (options.physics.hierarchicalRepulsion.hasOwnProperty(prop)) { this.constants.physics.hierarchicalRepulsion[prop] = options.physics.hierarchicalRepulsion[prop]; } } } } if (options.onAdd) {this.triggerFunctions.add = options.onAdd;} if (options.onEdit) {this.triggerFunctions.edit = options.onEdit;} if (options.onEditEdge) {this.triggerFunctions.editEdge = options.onEditEdge;} if (options.onConnect) {this.triggerFunctions.connect = options.onConnect;} if (options.onDelete) {this.triggerFunctions.del = options.onDelete;} util.mergeOptions(this.constants, options,'smoothCurves'); util.mergeOptions(this.constants, options,'hierarchicalLayout'); util.mergeOptions(this.constants, options,'clustering'); util.mergeOptions(this.constants, options,'navigation'); util.mergeOptions(this.constants, options,'keyboard'); util.mergeOptions(this.constants, options,'dataManipulation'); if (options.dataManipulation) { this.editMode = this.constants.dataManipulation.initiallyVisible; } // TODO: work out these options and document them if (options.edges) { if (options.edges.color !== undefined) { if (util.isString(options.edges.color)) { this.constants.edges.color = {}; this.constants.edges.color.color = options.edges.color; this.constants.edges.color.highlight = options.edges.color; this.constants.edges.color.hover = options.edges.color; } else { if (options.edges.color.color !== undefined) {this.constants.edges.color.color = options.edges.color.color;} if (options.edges.color.highlight !== undefined) {this.constants.edges.color.highlight = options.edges.color.highlight;} if (options.edges.color.hover !== undefined) {this.constants.edges.color.hover = options.edges.color.hover;} } } if (!options.edges.fontColor) { if (options.edges.color !== undefined) { if (util.isString(options.edges.color)) {this.constants.edges.fontColor = options.edges.color;} else if (options.edges.color.color !== undefined) {this.constants.edges.fontColor = options.edges.color.color;} } } } if (options.nodes) { if (options.nodes.color) { var newColorObj = util.parseColor(options.nodes.color); this.constants.nodes.color.background = newColorObj.background; this.constants.nodes.color.border = newColorObj.border; this.constants.nodes.color.highlight.background = newColorObj.highlight.background; this.constants.nodes.color.highlight.border = newColorObj.highlight.border; this.constants.nodes.color.hover.background = newColorObj.hover.background; this.constants.nodes.color.hover.border = newColorObj.hover.border; } } if (options.groups) { for (var groupname in options.groups) { if (options.groups.hasOwnProperty(groupname)) { var group = options.groups[groupname]; this.groups.add(groupname, group); } } } if (options.tooltip) { for (prop in options.tooltip) { if (options.tooltip.hasOwnProperty(prop)) { this.constants.tooltip[prop] = options.tooltip[prop]; } } if (options.tooltip.color) { this.constants.tooltip.color = util.parseColor(options.tooltip.color); } } if ('clickToUse' in options) { if (options.clickToUse) { this.activator = new Activator(this.frame); this.activator.on('change', this._createKeyBinds.bind(this)); } else { if (this.activator) { this.activator.destroy(); delete this.activator; } } } if (options.labels) { throw new Error('Option "labels" is deprecated. Use options "locale" and "locales" instead.'); } } // (Re)loading the mixins that can be enabled or disabled in the options. // load the force calculation functions, grouped under the physics system. this._loadPhysicsSystem(); // load the navigation system. this._loadNavigationControls(); // load the data manipulation system this._loadManipulationSystem(); // configure the smooth curves this._configureSmoothCurves(); // bind keys. If disabled, this will not do anything; this._createKeyBinds(); this.setSize(this.constants.width, this.constants.height); this.moving = true; this.start(); }; /** * Create the main frame for the Network. * This function is executed once when a Network object is created. The frame * contains a canvas, and this canvas contains all objects like the axis and * nodes. * @private */ Network.prototype._create = function () { // remove all elements from the container element. while (this.containerElement.hasChildNodes()) { this.containerElement.removeChild(this.containerElement.firstChild); } this.frame = document.createElement('div'); this.frame.className = 'vis network-frame'; this.frame.style.position = 'relative'; this.frame.style.overflow = 'hidden'; ////////////////////////////////////////////////////////////////// this.frame.canvas = document.createElement("canvas"); this.frame.canvas.style.position = 'relative'; this.frame.appendChild(this.frame.canvas); if (!this.frame.canvas.getContext) { var noCanvas = document.createElement( 'DIV' ); noCanvas.style.color = 'red'; noCanvas.style.fontWeight = 'bold' ; noCanvas.style.padding = '10px'; noCanvas.innerHTML = 'Error: your browser does not support HTML canvas'; this.frame.canvas.appendChild(noCanvas); } else { var ctx = this.frame.canvas.getContext("2d"); this.pixelRatio = (window.devicePixelRatio || 1) / (ctx.webkitBackingStorePixelRatio || ctx.mozBackingStorePixelRatio || ctx.msBackingStorePixelRatio || ctx.oBackingStorePixelRatio || ctx.backingStorePixelRatio || 1); this.frame.canvas.getContext("2d").setTransform(this.pixelRatio, 0, 0, this.pixelRatio, 0, 0); } ////////////////////////////////////////////////////////////////// var me = this; this.drag = {}; this.pinch = {}; this.hammer = Hammer(this.frame.canvas, { prevent_default: true }); this.hammer.on('tap', me._onTap.bind(me) ); this.hammer.on('doubletap', me._onDoubleTap.bind(me) ); this.hammer.on('hold', me._onHold.bind(me) ); this.hammer.on('pinch', me._onPinch.bind(me) ); this.hammer.on('touch', me._onTouch.bind(me) ); this.hammer.on('dragstart', me._onDragStart.bind(me) ); this.hammer.on('drag', me._onDrag.bind(me) ); this.hammer.on('dragend', me._onDragEnd.bind(me) ); this.hammer.on('mousewheel',me._onMouseWheel.bind(me) ); this.hammer.on('DOMMouseScroll',me._onMouseWheel.bind(me) ); // for FF this.hammer.on('mousemove', me._onMouseMoveTitle.bind(me) ); this.hammerFrame = Hammer(this.frame, { prevent_default: true }); this.hammerFrame.on('release', me._onRelease.bind(me) ); // add the frame to the container element this.containerElement.appendChild(this.frame); }; /** * Binding the keys for keyboard navigation. These functions are defined in the NavigationMixin * @private */ Network.prototype._createKeyBinds = function() { var me = this; if (this.keycharm !== undefined) { this.keycharm.destroy(); } this.keycharm = keycharm(); this.keycharm.reset(); if (this.constants.keyboard.enabled && this.isActive()) { this.keycharm.bind("up", this._moveUp.bind(me) , "keydown"); this.keycharm.bind("up", this._yStopMoving.bind(me), "keyup"); this.keycharm.bind("down", this._moveDown.bind(me) , "keydown"); this.keycharm.bind("down", this._yStopMoving.bind(me), "keyup"); this.keycharm.bind("left", this._moveLeft.bind(me) , "keydown"); this.keycharm.bind("left", this._xStopMoving.bind(me), "keyup"); this.keycharm.bind("right",this._moveRight.bind(me), "keydown"); this.keycharm.bind("right",this._xStopMoving.bind(me), "keyup"); this.keycharm.bind("=", this._zoomIn.bind(me), "keydown"); this.keycharm.bind("=", this._stopZoom.bind(me), "keyup"); this.keycharm.bind("num+", this._zoomIn.bind(me), "keydown"); this.keycharm.bind("num+", this._stopZoom.bind(me), "keyup"); this.keycharm.bind("num-", this._zoomOut.bind(me), "keydown"); this.keycharm.bind("num-", this._stopZoom.bind(me), "keyup"); this.keycharm.bind("-", this._zoomOut.bind(me), "keydown"); this.keycharm.bind("-", this._stopZoom.bind(me), "keyup"); this.keycharm.bind("[", this._zoomIn.bind(me), "keydown"); this.keycharm.bind("[", this._stopZoom.bind(me), "keyup"); this.keycharm.bind("]", this._zoomOut.bind(me), "keydown"); this.keycharm.bind("]", this._stopZoom.bind(me), "keyup"); this.keycharm.bind("pageup",this._zoomIn.bind(me), "keydown"); this.keycharm.bind("pageup",this._stopZoom.bind(me), "keyup"); this.keycharm.bind("pagedown",this._zoomOut.bind(me),"keydown"); this.keycharm.bind("pagedown",this._stopZoom.bind(me), "keyup"); } if (this.constants.dataManipulation.enabled == true) { this.keycharm.bind("esc",this._createManipulatorBar.bind(me)); this.keycharm.bind("delete",this._deleteSelected.bind(me)); } }; /** * Get the pointer location from a touch location * @param {{pageX: Number, pageY: Number}} touch * @return {{x: Number, y: Number}} pointer * @private */ Network.prototype._getPointer = function (touch) { return { x: touch.pageX - util.getAbsoluteLeft(this.frame.canvas), y: touch.pageY - util.getAbsoluteTop(this.frame.canvas) }; }; /** * On start of a touch gesture, store the pointer * @param event * @private */ Network.prototype._onTouch = function (event) { this.drag.pointer = this._getPointer(event.gesture.center); this.drag.pinched = false; this.pinch.scale = this._getScale(); this._handleTouch(this.drag.pointer); }; /** * handle drag start event * @private */ Network.prototype._onDragStart = function () { this._handleDragStart(); }; /** * This function is called by _onDragStart. * It is separated out because we can then overload it for the datamanipulation system. * * @private */ Network.prototype._handleDragStart = function() { var drag = this.drag; var node = this._getNodeAt(drag.pointer); // note: drag.pointer is set in _onTouch to get the initial touch location drag.dragging = true; drag.selection = []; drag.translation = this._getTranslation(); drag.nodeId = null; this.draggingNodes = false; if (node != null && this.constants.dragNodes == true) { this.draggingNodes = true; drag.nodeId = node.id; // select the clicked node if not yet selected if (!node.isSelected()) { this._selectObject(node,false); } this.emit("dragStart",{nodeIds:this.getSelection().nodes}); // create an array with the selected nodes and their original location and status for (var objectId in this.selectionObj.nodes) { if (this.selectionObj.nodes.hasOwnProperty(objectId)) { var object = this.selectionObj.nodes[objectId]; var s = { id: object.id, node: object, // store original x, y, xFixed and yFixed, make the node temporarily Fixed x: object.x, y: object.y, xFixed: object.xFixed, yFixed: object.yFixed }; object.xFixed = true; object.yFixed = true; drag.selection.push(s); } } } }; /** * handle drag event * @private */ Network.prototype._onDrag = function (event) { this._handleOnDrag(event) }; /** * This function is called by _onDrag. * It is separated out because we can then overload it for the datamanipulation system. * * @private */ Network.prototype._handleOnDrag = function(event) { if (this.drag.pinched) { return; } // remove the focus on node if it is focussed on by the focusOnNode this.releaseNode(); var pointer = this._getPointer(event.gesture.center); var me = this; var drag = this.drag; var selection = drag.selection; if (selection && selection.length && this.constants.dragNodes == true) { // calculate delta's and new location var deltaX = pointer.x - drag.pointer.x; var deltaY = pointer.y - drag.pointer.y; // update position of all selected nodes selection.forEach(function (s) { var node = s.node; if (!s.xFixed) { node.x = me._XconvertDOMtoCanvas(me._XconvertCanvasToDOM(s.x) + deltaX); } if (!s.yFixed) { node.y = me._YconvertDOMtoCanvas(me._YconvertCanvasToDOM(s.y) + deltaY); } }); // start _animationStep if not yet running if (!this.moving) { this.moving = true; this.start(); } } else { if (this.constants.dragNetwork == true) { // move the network var diffX = pointer.x - this.drag.pointer.x; var diffY = pointer.y - this.drag.pointer.y; this._setTranslation( this.drag.translation.x + diffX, this.drag.translation.y + diffY ); this._redraw(); // this.moving = true; // this.start(); } } }; /** * handle drag start event * @private */ Network.prototype._onDragEnd = function (event) { this._handleDragEnd(event); }; Network.prototype._handleDragEnd = function(event) { this.drag.dragging = false; var selection = this.drag.selection; if (selection && selection.length) { selection.forEach(function (s) { // restore original xFixed and yFixed s.node.xFixed = s.xFixed; s.node.yFixed = s.yFixed; }); this.moving = true; this.start(); } else { this._redraw(); } if (this.draggingNodes == false) { this.emit("dragEnd",{nodeIds:[]}); } else { this.emit("dragEnd",{nodeIds:this.getSelection().nodes}); } } /** * handle tap/click event: select/unselect a node * @private */ Network.prototype._onTap = function (event) { var pointer = this._getPointer(event.gesture.center); this.pointerPosition = pointer; this._handleTap(pointer); }; /** * handle doubletap event * @private */ Network.prototype._onDoubleTap = function (event) { var pointer = this._getPointer(event.gesture.center); this._handleDoubleTap(pointer); }; /** * handle long tap event: multi select nodes * @private */ Network.prototype._onHold = function (event) { var pointer = this._getPointer(event.gesture.center); this.pointerPosition = pointer; this._handleOnHold(pointer); }; /** * handle the release of the screen * * @private */ Network.prototype._onRelease = function (event) { var pointer = this._getPointer(event.gesture.center); this._handleOnRelease(pointer); }; /** * Handle pinch event * @param event * @private */ Network.prototype._onPinch = function (event) { var pointer = this._getPointer(event.gesture.center); this.drag.pinched = true; if (!('scale' in this.pinch)) { this.pinch.scale = 1; } // TODO: enabled moving while pinching? var scale = this.pinch.scale * event.gesture.scale; this._zoom(scale, pointer) }; /** * Zoom the network in or out * @param {Number} scale a number around 1, and between 0.01 and 10 * @param {{x: Number, y: Number}} pointer Position on screen * @return {Number} appliedScale scale is limited within the boundaries * @private */ Network.prototype._zoom = function(scale, pointer) { if (this.constants.zoomable == true) { var scaleOld = this._getScale(); if (scale < 0.00001) { scale = 0.00001; } if (scale > 10) { scale = 10; } var preScaleDragPointer = null; if (this.drag !== undefined) { if (this.drag.dragging == true) { preScaleDragPointer = this.DOMtoCanvas(this.drag.pointer); } } // + this.frame.canvas.clientHeight / 2 var translation = this._getTranslation(); var scaleFrac = scale / scaleOld; var tx = (1 - scaleFrac) * pointer.x + translation.x * scaleFrac; var ty = (1 - scaleFrac) * pointer.y + translation.y * scaleFrac; this.areaCenter = {"x" : this._XconvertDOMtoCanvas(pointer.x), "y" : this._YconvertDOMtoCanvas(pointer.y)}; this._setScale(scale); this._setTranslation(tx, ty); this.updateClustersDefault(); if (preScaleDragPointer != null) { var postScaleDragPointer = this.canvasToDOM(preScaleDragPointer); this.drag.pointer.x = postScaleDragPointer.x; this.drag.pointer.y = postScaleDragPointer.y; } this._redraw(); if (scaleOld < scale) { this.emit("zoom", {direction:"+"}); } else { this.emit("zoom", {direction:"-"}); } return scale; } }; /** * Event handler for mouse wheel event, used to zoom the timeline * See http://adomas.org/javascript-mouse-wheel/ * https://github.com/EightMedia/hammer.js/issues/256 * @param {MouseEvent} event * @private */ Network.prototype._onMouseWheel = function(event) { // retrieve delta var delta = 0; if (event.wheelDelta) { /* IE/Opera. */ delta = event.wheelDelta/120; } else if (event.detail) { /* Mozilla case. */ // In Mozilla, sign of delta is different than in IE. // Also, delta is multiple of 3. delta = -event.detail/3; } // If delta is nonzero, handle it. // Basically, delta is now positive if wheel was scrolled up, // and negative, if wheel was scrolled down. if (delta) { // calculate the new scale var scale = this._getScale(); var zoom = delta / 10; if (delta < 0) { zoom = zoom / (1 - zoom); } scale *= (1 + zoom); // calculate the pointer location var gesture = hammerUtil.fakeGesture(this, event); var pointer = this._getPointer(gesture.center); // apply the new scale this._zoom(scale, pointer); } // Prevent default actions caused by mouse wheel. event.preventDefault(); }; /** * Mouse move handler for checking whether the title moves over a node with a title. * @param {Event} event * @private */ Network.prototype._onMouseMoveTitle = function (event) { var gesture = hammerUtil.fakeGesture(this, event); var pointer = this._getPointer(gesture.center); // check if the previously selected node is still selected if (this.popupObj) { this._checkHidePopup(pointer); } // start a timeout that will check if the mouse is positioned above // an element var me = this; var checkShow = function() { me._checkShowPopup(pointer); }; if (this.popupTimer) { clearInterval(this.popupTimer); // stop any running calculationTimer } if (!this.drag.dragging) { this.popupTimer = setTimeout(checkShow, this.constants.tooltip.delay); } /** * Adding hover highlights */ if (this.constants.hover == true) { // removing all hover highlights for (var edgeId in this.hoverObj.edges) { if (this.hoverObj.edges.hasOwnProperty(edgeId)) { this.hoverObj.edges[edgeId].hover = false; delete this.hoverObj.edges[edgeId]; } } // adding hover highlights var obj = this._getNodeAt(pointer); if (obj == null) { obj = this._getEdgeAt(pointer); } if (obj != null) { this._hoverObject(obj); } // removing all node hover highlights except for the selected one. for (var nodeId in this.hoverObj.nodes) { if (this.hoverObj.nodes.hasOwnProperty(nodeId)) { if (obj instanceof Node && obj.id != nodeId || obj instanceof Edge || obj == null) { this._blurObject(this.hoverObj.nodes[nodeId]); delete this.hoverObj.nodes[nodeId]; } } } this.redraw(); } }; /** * Check if there is an element on the given position in the network * (a node or edge). If so, and if this element has a title, * show a popup window with its title. * * @param {{x:Number, y:Number}} pointer * @private */ Network.prototype._checkShowPopup = function (pointer) { var obj = { left: this._XconvertDOMtoCanvas(pointer.x), top: this._YconvertDOMtoCanvas(pointer.y), right: this._XconvertDOMtoCanvas(pointer.x), bottom: this._YconvertDOMtoCanvas(pointer.y) }; var id; var lastPopupNode = this.popupObj; if (this.popupObj == undefined) { // search the nodes for overlap, select the top one in case of multiple nodes var nodes = this.nodes; for (id in nodes) { if (nodes.hasOwnProperty(id)) { var node = nodes[id]; if (node.getTitle() !== undefined && node.isOverlappingWith(obj)) { this.popupObj = node; break; } } } } if (this.popupObj === undefined) { // search the edges for overlap var edges = this.edges; for (id in edges) { if (edges.hasOwnProperty(id)) { var edge = edges[id]; if (edge.connected && (edge.getTitle() !== undefined) && edge.isOverlappingWith(obj)) { this.popupObj = edge; break; } } } } if (this.popupObj) { // show popup message window if (this.popupObj != lastPopupNode) { var me = this; if (!me.popup) { me.popup = new Popup(me.frame, me.constants.tooltip); } // adjust a small offset such that the mouse cursor is located in the // bottom left location of the popup, and you can easily move over the // popup area me.popup.setPosition(pointer.x - 3, pointer.y - 3); me.popup.setText(me.popupObj.getTitle()); me.popup.show(); } } else { if (this.popup) { this.popup.hide(); } } }; /** * Check if the popup must be hided, which is the case when the mouse is no * longer hovering on the object * @param {{x:Number, y:Number}} pointer * @private */ Network.prototype._checkHidePopup = function (pointer) { if (!this.popupObj || !this._getNodeAt(pointer) ) { this.popupObj = undefined; if (this.popup) { this.popup.hide(); } } }; /** * Set a new size for the network * @param {string} width Width in pixels or percentage (for example '800px' * or '50%') * @param {string} height Height in pixels or percentage (for example '400px' * or '30%') */ Network.prototype.setSize = function(width, height) { var emitEvent = false; var oldWidth = this.frame.canvas.width; var oldHeight = this.frame.canvas.height; if (width != this.constants.width || height != this.constants.height || this.frame.style.width != width || this.frame.style.height != height) { this.frame.style.width = width; this.frame.style.height = height; this.frame.canvas.style.width = '100%'; this.frame.canvas.style.height = '100%'; this.frame.canvas.width = this.frame.canvas.clientWidth * this.pixelRatio; this.frame.canvas.height = this.frame.canvas.clientHeight * this.pixelRatio; this.constants.width = width; this.constants.height = height; emitEvent = true; } else { // this would adapt the width of the canvas to the width from 100% if and only if // there is a change. if (this.frame.canvas.width != this.frame.canvas.clientWidth * this.pixelRatio) { this.frame.canvas.width = this.frame.canvas.clientWidth * this.pixelRatio; emitEvent = true; } if (this.frame.canvas.height != this.frame.canvas.clientHeight * this.pixelRatio) { this.frame.canvas.height = this.frame.canvas.clientHeight * this.pixelRatio; emitEvent = true; } } if (emitEvent == true) { this.emit('resize', {width:this.frame.canvas.width * this.pixelRatio,height:this.frame.canvas.height * this.pixelRatio, oldWidth: oldWidth * this.pixelRatio, oldHeight: oldHeight * this.pixelRatio}); } }; /** * Set a data set with nodes for the network * @param {Array | DataSet | DataView} nodes The data containing the nodes. * @private */ Network.prototype._setNodes = function(nodes) { var oldNodesData = this.nodesData; if (nodes instanceof DataSet || nodes instanceof DataView) { this.nodesData = nodes; } else if (Array.isArray(nodes)) { this.nodesData = new DataSet(); this.nodesData.add(nodes); } else if (!nodes) { this.nodesData = new DataSet(); } else { throw new TypeError('Array or DataSet expected'); } if (oldNodesData) { // unsubscribe from old dataset util.forEach(this.nodesListeners, function (callback, event) { oldNodesData.off(event, callback); }); } // remove drawn nodes this.nodes = {}; if (this.nodesData) { // subscribe to new dataset var me = this; util.forEach(this.nodesListeners, function (callback, event) { me.nodesData.on(event, callback); }); // draw all new nodes var ids = this.nodesData.getIds(); this._addNodes(ids); } this._updateSelection(); }; /** * Add nodes * @param {Number[] | String[]} ids * @private */ Network.prototype._addNodes = function(ids) { var id; for (var i = 0, len = ids.length; i < len; i++) { id = ids[i]; var data = this.nodesData.get(id); var node = new Node(data, this.images, this.groups, this.constants); this.nodes[id] = node; // note: this may replace an existing node if ((node.xFixed == false || node.yFixed == false) && (node.x === null || node.y === null)) { var radius = 10 * 0.1*ids.length + 10; var angle = 2 * Math.PI * Math.random(); if (node.xFixed == false) {node.x = radius * Math.cos(angle);} if (node.yFixed == false) {node.y = radius * Math.sin(angle);} } this.moving = true; } this._updateNodeIndexList(); if (this.constants.hierarchicalLayout.enabled == true && this.initializing == false) { this._resetLevels(); this._setupHierarchicalLayout(); } this._updateCalculationNodes(); this._reconnectEdges(); this._updateValueRange(this.nodes); this.updateLabels(); }; /** * Update existing nodes, or create them when not yet existing * @param {Number[] | String[]} ids * @private */ Network.prototype._updateNodes = function(ids,changedData) { var nodes = this.nodes; for (var i = 0, len = ids.length; i < len; i++) { var id = ids[i]; var node = nodes[id]; var data = changedData[i]; if (node) { // update node node.setProperties(data, this.constants); } else { // create node node = new Node(properties, this.images, this.groups, this.constants); nodes[id] = node; } } this.moving = true; if (this.constants.hierarchicalLayout.enabled == true && this.initializing == false) { this._resetLevels(); this._setupHierarchicalLayout(); } this._updateNodeIndexList(); this._updateValueRange(nodes); }; /** * Remove existing nodes. If nodes do not exist, the method will just ignore it. * @param {Number[] | String[]} ids * @private */ Network.prototype._removeNodes = function(ids) { var nodes = this.nodes; for (var i = 0, len = ids.length; i < len; i++) { var id = ids[i]; delete nodes[id]; } this._updateNodeIndexList(); if (this.constants.hierarchicalLayout.enabled == true && this.initializing == false) { this._resetLevels(); this._setupHierarchicalLayout(); } this._updateCalculationNodes(); this._reconnectEdges(); this._updateSelection(); this._updateValueRange(nodes); }; /** * Load edges by reading the data table * @param {Array | DataSet | DataView} edges The data containing the edges. * @private * @private */ Network.prototype._setEdges = function(edges) { var oldEdgesData = this.edgesData; if (edges instanceof DataSet || edges instanceof DataView) { this.edgesData = edges; } else if (Array.isArray(edges)) { this.edgesData = new DataSet(); this.edgesData.add(edges); } else if (!edges) { this.edgesData = new DataSet(); } else { throw new TypeError('Array or DataSet expected'); } if (oldEdgesData) { // unsubscribe from old dataset util.forEach(this.edgesListeners, function (callback, event) { oldEdgesData.off(event, callback); }); } // remove drawn edges this.edges = {}; if (this.edgesData) { // subscribe to new dataset var me = this; util.forEach(this.edgesListeners, function (callback, event) { me.edgesData.on(event, callback); }); // draw all new nodes var ids = this.edgesData.getIds(); this._addEdges(ids); } this._reconnectEdges(); }; /** * Add edges * @param {Number[] | String[]} ids * @private */ Network.prototype._addEdges = function (ids) { var edges = this.edges, edgesData = this.edgesData; for (var i = 0, len = ids.length; i < len; i++) { var id = ids[i]; var oldEdge = edges[id]; if (oldEdge) { oldEdge.disconnect(); } var data = edgesData.get(id, {"showInternalIds" : true}); edges[id] = new Edge(data, this, this.constants); } this.moving = true; this._updateValueRange(edges); this._createBezierNodes(); this._updateCalculationNodes(); if (this.constants.hierarchicalLayout.enabled == true && this.initializing == false) { this._resetLevels(); this._setupHierarchicalLayout(); } }; /** * Update existing edges, or create them when not yet existing * @param {Number[] | String[]} ids * @private */ Network.prototype._updateEdges = function (ids) { var edges = this.edges, edgesData = this.edgesData; for (var i = 0, len = ids.length; i < len; i++) { var id = ids[i]; var data = edgesData.get(id); var edge = edges[id]; if (edge) { // update edge edge.disconnect(); edge.setProperties(data, this.constants); edge.connect(); } else { // create edge edge = new Edge(data, this, this.constants); this.edges[id] = edge; } } this._createBezierNodes(); if (this.constants.hierarchicalLayout.enabled == true && this.initializing == false) { this._resetLevels(); this._setupHierarchicalLayout(); } this.moving = true; this._updateValueRange(edges); }; /** * Remove existing edges. Non existing ids will be ignored * @param {Number[] | String[]} ids * @private */ Network.prototype._removeEdges = function (ids) { var edges = this.edges; for (var i = 0, len = ids.length; i < len; i++) { var id = ids[i]; var edge = edges[id]; if (edge) { if (edge.via != null) { delete this.sectors['support']['nodes'][edge.via.id]; } edge.disconnect(); delete edges[id]; } } this.moving = true; this._updateValueRange(edges); if (this.constants.hierarchicalLayout.enabled == true && this.initializing == false) { this._resetLevels(); this._setupHierarchicalLayout(); } this._updateCalculationNodes(); }; /** * Reconnect all edges * @private */ Network.prototype._reconnectEdges = function() { var id, nodes = this.nodes, edges = this.edges; for (id in nodes) { if (nodes.hasOwnProperty(id)) { nodes[id].edges = []; nodes[id].dynamicEdges = []; } } for (id in edges) { if (edges.hasOwnProperty(id)) { var edge = edges[id]; edge.from = null; edge.to = null; edge.connect(); } } }; /** * Update the values of all object in the given array according to the current * value range of the objects in the array. * @param {Object} obj An object containing a set of Edges or Nodes * The objects must have a method getValue() and * setValueRange(min, max). * @private */ Network.prototype._updateValueRange = function(obj) { var id; // determine the range of the objects var valueMin = undefined; var valueMax = undefined; for (id in obj) { if (obj.hasOwnProperty(id)) { var value = obj[id].getValue(); if (value !== undefined) { valueMin = (valueMin === undefined) ? value : Math.min(value, valueMin); valueMax = (valueMax === undefined) ? value : Math.max(value, valueMax); } } } // adjust the range of all objects if (valueMin !== undefined && valueMax !== undefined) { for (id in obj) { if (obj.hasOwnProperty(id)) { obj[id].setValueRange(valueMin, valueMax); } } } }; /** * Redraw the network with the current data * chart will be resized too. */ Network.prototype.redraw = function() { this.setSize(this.constants.width, this.constants.height); this._redraw(); }; /** * Redraw the network with the current data * @private */ Network.prototype._redraw = function() { var ctx = this.frame.canvas.getContext('2d'); ctx.setTransform(this.pixelRatio, 0, 0, this.pixelRatio, 0, 0); // clear the canvas var w = this.frame.canvas.width * this.pixelRatio; var h = this.frame.canvas.height * this.pixelRatio; ctx.clearRect(0, 0, w, h); // set scaling and translation ctx.save(); ctx.translate(this.translation.x, this.translation.y); ctx.scale(this.scale, this.scale); this.canvasTopLeft = { "x": this._XconvertDOMtoCanvas(0), "y": this._YconvertDOMtoCanvas(0) }; this.canvasBottomRight = { "x": this._XconvertDOMtoCanvas(this.frame.canvas.clientWidth * this.pixelRatio), "y": this._YconvertDOMtoCanvas(this.frame.canvas.clientHeight * this.pixelRatio) }; this._doInAllSectors("_drawAllSectorNodes",ctx); if (this.drag.dragging == false || this.drag.dragging === undefined || this.constants.hideEdgesOnDrag == false) { this._doInAllSectors("_drawEdges",ctx); } if (this.drag.dragging == false || this.drag.dragging === undefined || this.constants.hideNodesOnDrag == false) { this._doInAllSectors("_drawNodes",ctx,false); } if (this.controlNodesActive == true) { this._doInAllSectors("_drawControlNodes",ctx); } // this._doInSupportSector("_drawNodes",ctx,true); // this._drawTree(ctx,"#F00F0F"); // restore original scaling and translation ctx.restore(); }; /** * Set the translation of the network * @param {Number} offsetX Horizontal offset * @param {Number} offsetY Vertical offset * @private */ Network.prototype._setTranslation = function(offsetX, offsetY) { if (this.translation === undefined) { this.translation = { x: 0, y: 0 }; } if (offsetX !== undefined) { this.translation.x = offsetX; } if (offsetY !== undefined) { this.translation.y = offsetY; } this.emit('viewChanged'); }; /** * Get the translation of the network * @return {Object} translation An object with parameters x and y, both a number * @private */ Network.prototype._getTranslation = function() { return { x: this.translation.x, y: this.translation.y }; }; /** * Scale the network * @param {Number} scale Scaling factor 1.0 is unscaled * @private */ Network.prototype._setScale = function(scale) { this.scale = scale; }; /** * Get the current scale of the network * @return {Number} scale Scaling factor 1.0 is unscaled * @private */ Network.prototype._getScale = function() { return this.scale; }; /** * Convert the X coordinate in DOM-space (coordinate point in browser relative to the container div) to * the X coordinate in canvas-space (the simulation sandbox, which the camera looks upon) * @param {number} x * @returns {number} * @private */ Network.prototype._XconvertDOMtoCanvas = function(x) { return (x - this.translation.x) / this.scale; }; /** * Convert the X coordinate in canvas-space (the simulation sandbox, which the camera looks upon) to * the X coordinate in DOM-space (coordinate point in browser relative to the container div) * @param {number} x * @returns {number} * @private */ Network.prototype._XconvertCanvasToDOM = function(x) { return x * this.scale + this.translation.x; }; /** * Convert the Y coordinate in DOM-space (coordinate point in browser relative to the container div) to * the Y coordinate in canvas-space (the simulation sandbox, which the camera looks upon) * @param {number} y * @returns {number} * @private */ Network.prototype._YconvertDOMtoCanvas = function(y) { return (y - this.translation.y) / this.scale; }; /** * Convert the Y coordinate in canvas-space (the simulation sandbox, which the camera looks upon) to * the Y coordinate in DOM-space (coordinate point in browser relative to the container div) * @param {number} y * @returns {number} * @private */ Network.prototype._YconvertCanvasToDOM = function(y) { return y * this.scale + this.translation.y ; }; /** * * @param {object} pos = {x: number, y: number} * @returns {{x: number, y: number}} * @constructor */ Network.prototype.canvasToDOM = function (pos) { return {x: this._XconvertCanvasToDOM(pos.x), y: this._YconvertCanvasToDOM(pos.y)}; }; /** * * @param {object} pos = {x: number, y: number} * @returns {{x: number, y: number}} * @constructor */ Network.prototype.DOMtoCanvas = function (pos) { return {x: this._XconvertDOMtoCanvas(pos.x), y: this._YconvertDOMtoCanvas(pos.y)}; }; /** * Redraw all nodes * The 2d context of a HTML canvas can be retrieved by canvas.getContext('2d'); * @param {CanvasRenderingContext2D} ctx * @param {Boolean} [alwaysShow] * @private */ Network.prototype._drawNodes = function(ctx,alwaysShow) { if (alwaysShow === undefined) { alwaysShow = false; } // first draw the unselected nodes var nodes = this.nodes; var selected = []; for (var id in nodes) { if (nodes.hasOwnProperty(id)) { nodes[id].setScaleAndPos(this.scale,this.canvasTopLeft,this.canvasBottomRight); if (nodes[id].isSelected()) { selected.push(id); } else { if (nodes[id].inArea() || alwaysShow) { nodes[id].draw(ctx); } } } } // draw the selected nodes on top for (var s = 0, sMax = selected.length; s < sMax; s++) { if (nodes[selected[s]].inArea() || alwaysShow) { nodes[selected[s]].draw(ctx); } } }; /** * Redraw all edges * The 2d context of a HTML canvas can be retrieved by canvas.getContext('2d'); * @param {CanvasRenderingContext2D} ctx * @private */ Network.prototype._drawEdges = function(ctx) { var edges = this.edges; for (var id in edges) { if (edges.hasOwnProperty(id)) { var edge = edges[id]; edge.setScale(this.scale); if (edge.connected) { edges[id].draw(ctx); } } } }; /** * Redraw all edges * The 2d context of a HTML canvas can be retrieved by canvas.getContext('2d'); * @param {CanvasRenderingContext2D} ctx * @private */ Network.prototype._drawControlNodes = function(ctx) { var edges = this.edges; for (var id in edges) { if (edges.hasOwnProperty(id)) { edges[id]._drawControlNodes(ctx); } } }; /** * Find a stable position for all nodes * @private */ Network.prototype._stabilize = function() { if (this.constants.freezeForStabilization == true) { this._freezeDefinedNodes(); } // find stable position var count = 0; while (this.moving && count < this.constants.stabilizationIterations) { this._physicsTick(); count++; } this.zoomExtent(undefined,false,true); if (this.constants.freezeForStabilization == true) { this._restoreFrozenNodes(); } }; /** * When initializing and stabilizing, we can freeze nodes with a predefined position. This greatly speeds up stabilization * because only the supportnodes for the smoothCurves have to settle. * * @private */ Network.prototype._freezeDefinedNodes = function() { var nodes = this.nodes; for (var id in nodes) { if (nodes.hasOwnProperty(id)) { if (nodes[id].x != null && nodes[id].y != null) { nodes[id].fixedData.x = nodes[id].xFixed; nodes[id].fixedData.y = nodes[id].yFixed; nodes[id].xFixed = true; nodes[id].yFixed = true; } } } }; /** * Unfreezes the nodes that have been frozen by _freezeDefinedNodes. * * @private */ Network.prototype._restoreFrozenNodes = function() { var nodes = this.nodes; for (var id in nodes) { if (nodes.hasOwnProperty(id)) { if (nodes[id].fixedData.x != null) { nodes[id].xFixed = nodes[id].fixedData.x; nodes[id].yFixed = nodes[id].fixedData.y; } } } }; /** * Check if any of the nodes is still moving * @param {number} vmin the minimum velocity considered as 'moving' * @return {boolean} true if moving, false if non of the nodes is moving * @private */ Network.prototype._isMoving = function(vmin) { var nodes = this.nodes; for (var id in nodes) { if (nodes.hasOwnProperty(id) && nodes[id].isMoving(vmin)) { return true; } } return false; }; /** * /** * Perform one discrete step for all nodes * * @private */ Network.prototype._discreteStepNodes = function() { var interval = this.physicsDiscreteStepsize; var nodes = this.nodes; var nodeId; var nodesPresent = false; if (this.constants.maxVelocity > 0) { for (nodeId in nodes) { if (nodes.hasOwnProperty(nodeId)) { nodes[nodeId].discreteStepLimited(interval, this.constants.maxVelocity); nodesPresent = true; } } } else { for (nodeId in nodes) { if (nodes.hasOwnProperty(nodeId)) { nodes[nodeId].discreteStep(interval); nodesPresent = true; } } } if (nodesPresent == true) { var vminCorrected = this.constants.minVelocity / Math.max(this.scale,0.05); if (vminCorrected > 0.5*this.constants.maxVelocity) { return true; } else { return this._isMoving(vminCorrected); } } return false; }; /** * A single simulation step (or "tick") in the physics simulation * * @private */ Network.prototype._physicsTick = function() { if (!this.freezeSimulation) { if (this.moving == true) { var mainMovingStatus = false; var supportMovingStatus = false; this._doInAllActiveSectors("_initializeForceCalculation"); var mainMoving = this._doInAllActiveSectors("_discreteStepNodes"); if (this.constants.smoothCurves.enabled == true && this.constants.smoothCurves.dynamic == true) { supportMovingStatus = this._doInSupportSector("_discreteStepNodes"); } // gather movement data from all sectors, if one moves, we are NOT stabilzied for (var i = 0; i < mainMoving.length; i++) {mainMovingStatus = mainMoving[0] || mainMovingStatus;} // determine if the network has stabilzied this.moving = mainMovingStatus || supportMovingStatus; this.stabilizationIterations++; } } }; /** * This function runs one step of the animation. It calls an x amount of physics ticks and one render tick. * It reschedules itself at the beginning of the function * * @private */ Network.prototype._animationStep = function() { // reset the timer so a new scheduled animation step can be set this.timer = undefined; // handle the keyboad movement this._handleNavigation(); // this schedules a new animation step this.start(); // start the physics simulation var calculationTime = Date.now(); var maxSteps = 1; this._physicsTick(); var timeRequired = Date.now() - calculationTime; while (timeRequired < 0.9*(this.renderTimestep - this.renderTime) && maxSteps < this.maxPhysicsTicksPerRender) { this._physicsTick(); timeRequired = Date.now() - calculationTime; maxSteps++; } // start the rendering process var renderTime = Date.now(); this._redraw(); this.renderTime = Date.now() - renderTime; }; if (typeof window !== 'undefined') { window.requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame; } /** * Schedule a animation step with the refreshrate interval. */ Network.prototype.start = function() { if (this.moving == true || this.xIncrement != 0 || this.yIncrement != 0 || this.zoomIncrement != 0) { if (this.startedStabilization == false) { this.emit("startStabilization"); this.startedStabilization = true; } if (!this.timer) { var ua = navigator.userAgent.toLowerCase(); var requiresTimeout = false; if (ua.indexOf('msie 9.0') != -1) { // IE 9 requiresTimeout = true; } else if (ua.indexOf('safari') != -1) { // safari if (ua.indexOf('chrome') <= -1) { requiresTimeout = true; } } if (requiresTimeout == true) { this.timer = window.setTimeout(this._animationStep.bind(this), this.renderTimestep); // wait this.renderTimeStep milliseconds and perform the animation step function } else{ this.timer = window.requestAnimationFrame(this._animationStep.bind(this), this.renderTimestep); // wait this.renderTimeStep milliseconds and perform the animation step function } } } else { this._redraw(); if (this.stabilizationIterations > 0) { // trigger the "stabilized" event. // The event is triggered on the next tick, to prevent the case that // it is fired while initializing the Network, in which case you would not // be able to catch it var me = this; var params = { iterations: me.stabilizationIterations }; me.stabilizationIterations = 0; me.startedStabilization = false; setTimeout(function () { me.emit("stabilized", params); }, 0); } } }; /** * Move the network according to the keyboard presses. * * @private */ Network.prototype._handleNavigation = function() { if (this.xIncrement != 0 || this.yIncrement != 0) { var translation = this._getTranslation(); this._setTranslation(translation.x+this.xIncrement, translation.y+this.yIncrement); } if (this.zoomIncrement != 0) { var center = { x: this.frame.canvas.clientWidth / 2, y: this.frame.canvas.clientHeight / 2 }; this._zoom(this.scale*(1 + this.zoomIncrement), center); } }; /** * Freeze the _animationStep */ Network.prototype.toggleFreeze = function() { if (this.freezeSimulation == false) { this.freezeSimulation = true; } else { this.freezeSimulation = false; this.start(); } }; /** * This function cleans the support nodes if they are not needed and adds them when they are. * * @param {boolean} [disableStart] * @private */ Network.prototype._configureSmoothCurves = function(disableStart) { if (disableStart === undefined) { disableStart = true; } if (this.constants.smoothCurves.enabled == true && this.constants.smoothCurves.dynamic == true) { this._createBezierNodes(); // cleanup unused support nodes for (var nodeId in this.sectors['support']['nodes']) { if (this.sectors['support']['nodes'].hasOwnProperty(nodeId)) { if (this.edges[this.sectors['support']['nodes'][nodeId].parentEdgeId] === undefined) { delete this.sectors['support']['nodes'][nodeId]; } } } } else { // delete the support nodes this.sectors['support']['nodes'] = {}; for (var edgeId in this.edges) { if (this.edges.hasOwnProperty(edgeId)) { this.edges[edgeId].via = null; } } } this._updateCalculationNodes(); if (!disableStart) { this.moving = true; this.start(); } }; /** * Bezier curves require an anchor point to calculate the smooth flow. These points are nodes. These nodes are invisible but * are used for the force calculation. * * @private */ Network.prototype._createBezierNodes = function() { if (this.constants.smoothCurves.enabled == true && this.constants.smoothCurves.dynamic == true) { for (var edgeId in this.edges) { if (this.edges.hasOwnProperty(edgeId)) { var edge = this.edges[edgeId]; if (edge.via == null) { var nodeId = "edgeId:".concat(edge.id); this.sectors['support']['nodes'][nodeId] = new Node( {id:nodeId, mass:1, shape:'circle', image:"", internalMultiplier:1 },{},{},this.constants); edge.via = this.sectors['support']['nodes'][nodeId]; edge.via.parentEdgeId = edge.id; edge.positionBezierNode(); } } } } }; /** * load the functions that load the mixins into the prototype. * * @private */ Network.prototype._initializeMixinLoaders = function () { for (var mixin in MixinLoader) { if (MixinLoader.hasOwnProperty(mixin)) { Network.prototype[mixin] = MixinLoader[mixin]; } } }; /** * Load the XY positions of the nodes into the dataset. */ Network.prototype.storePosition = function() { console.log("storePosition is depricated: use .storePositions() from now on.") this.storePositions(); }; /** * Load the XY positions of the nodes into the dataset. */ Network.prototype.storePositions = function() { var dataArray = []; for (var nodeId in this.nodes) { if (this.nodes.hasOwnProperty(nodeId)) { var node = this.nodes[nodeId]; var allowedToMoveX = !this.nodes.xFixed; var allowedToMoveY = !this.nodes.yFixed; if (this.nodesData._data[nodeId].x != Math.round(node.x) || this.nodesData._data[nodeId].y != Math.round(node.y)) { dataArray.push({id:nodeId,x:Math.round(node.x),y:Math.round(node.y),allowedToMoveX:allowedToMoveX,allowedToMoveY:allowedToMoveY}); } } } this.nodesData.update(dataArray); }; /** * Return the positions of the nodes. */ Network.prototype.getPositions = function(ids) { var dataArray = {}; if (ids !== undefined) { if (Array.isArray(ids) == true) { for (var i = 0; i < ids.length; i++) { if (this.nodes[ids[i]] !== undefined) { var node = this.nodes[ids[i]]; dataArray[ids[i]] = {x: Math.round(node.x), y: Math.round(node.y)}; } } } else { if (this.nodes[ids] !== undefined) { var node = this.nodes[ids]; dataArray[ids] = {x: Math.round(node.x), y: Math.round(node.y)}; } } } else { for (var nodeId in this.nodes) { if (this.nodes.hasOwnProperty(nodeId)) { var node = this.nodes[nodeId]; dataArray[nodeId] = {x: Math.round(node.x), y: Math.round(node.y)}; } } } return dataArray; }; /** * Center a node in view. * * @param {Number} nodeId * @param {Number} [options] */ Network.prototype.focusOnNode = function (nodeId, options) { if (this.nodes.hasOwnProperty(nodeId)) { if (options === undefined) { options = {}; } var nodePosition = {x: this.nodes[nodeId].x, y: this.nodes[nodeId].y}; options.position = nodePosition; options.lockedOnNode = nodeId; this.moveTo(options) } else { console.log("This nodeId cannot be found."); } }; /** * * @param {Object} options | options.offset = {x:Number, y:Number} // offset from the center in DOM pixels * | options.scale = Number // scale to move to * | options.position = {x:Number, y:Number} // position to move to * | options.animation = {duration:Number, easingFunction:String} || Boolean // position to move to */ Network.prototype.moveTo = function (options) { if (options === undefined) { options = {}; return; } if (options.offset === undefined) {options.offset = {x: 0, y: 0}; } if (options.offset.x === undefined) {options.offset.x = 0; } if (options.offset.y === undefined) {options.offset.y = 0; } if (options.scale === undefined) {options.scale = this._getScale(); } if (options.position === undefined) {options.position = this._getTranslation();} if (options.animation === undefined) {options.animation = {duration:0}; } if (options.animation === false ) {options.animation = {duration:0}; } if (options.animation === true ) {options.animation = {}; } if (options.animation.duration === undefined) {options.animation.duration = 1000; } // default duration if (options.animation.easingFunction === undefined) {options.animation.easingFunction = "easeInOutQuad"; } // default easing function this.animateView(options); }; /** * * @param {Object} options | options.offset = {x:Number, y:Number} // offset from the center in DOM pixels * | options.time = Number // animation time in milliseconds * | options.scale = Number // scale to animate to * | options.position = {x:Number, y:Number} // position to animate to * | options.easingFunction = String // linear, easeInQuad, easeOutQuad, easeInOutQuad, * // easeInCubic, easeOutCubic, easeInOutCubic, * // easeInQuart, easeOutQuart, easeInOutQuart, * // easeInQuint, easeOutQuint, easeInOutQuint */ Network.prototype.animateView = function (options) { if (options === undefined) { options = {}; return; } // release if something focussed on the node this.releaseNode(); if (options.locked == true) { this.lockedOnNodeId = options.lockedOnNode; this.lockedOnNodeOffset = options.offset; } // forcefully complete the old animation if it was still running if (this.easingTime != 0) { this._transitionRedraw(1); // by setting easingtime to 1, we finish the animation. } this.sourceScale = this._getScale(); this.sourceTranslation = this._getTranslation(); this.targetScale = options.scale; // set the scale so the viewCenter is based on the correct zoom level. This is overridden in the transitionRedraw // but at least then we'll have the target transition this._setScale(this.targetScale); var viewCenter = this.DOMtoCanvas({x: 0.5 * this.frame.canvas.clientWidth, y: 0.5 * this.frame.canvas.clientHeight}); var distanceFromCenter = { // offset from view, distance view has to change by these x and y to center the node x: viewCenter.x - options.position.x, y: viewCenter.y - options.position.y }; this.targetTranslation = { x: this.sourceTranslation.x + distanceFromCenter.x * this.targetScale + options.offset.x, y: this.sourceTranslation.y + distanceFromCenter.y * this.targetScale + options.offset.y }; // if the time is set to 0, don't do an animation if (options.animation.duration == 0) { if (this.lockedOnNodeId != null) { this._classicRedraw = this._redraw; this._redraw = this._lockedRedraw; } else { this._setScale(this.targetScale); this._setTranslation(this.targetTranslation.x, this.targetTranslation.y); this._redraw(); } } else { this.animationSpeed = 1 / (this.renderRefreshRate * options.animation.duration * 0.001) || 1 / this.renderRefreshRate; this.animationEasingFunction = options.animation.easingFunction; this._classicRedraw = this._redraw; this._redraw = this._transitionRedraw; this._redraw(); this.moving = true; this.start(); } }; Network.prototype._lockedRedraw = function () { var nodePosition = {x: this.nodes[this.lockedOnNodeId].x, y: this.nodes[this.lockedOnNodeId].y}; var viewCenter = this.DOMtoCanvas({x: 0.5 * this.frame.canvas.clientWidth, y: 0.5 * this.frame.canvas.clientHeight}); var distanceFromCenter = { // offset from view, distance view has to change by these x and y to center the node x: viewCenter.x - nodePosition.x, y: viewCenter.y - nodePosition.y }; var sourceTranslation = this._getTranslation(); var targetTranslation = { x: sourceTranslation.x + distanceFromCenter.x * this.scale + this.lockedOnNodeOffset.x, y: sourceTranslation.y + distanceFromCenter.y * this.scale + this.lockedOnNodeOffset.y }; this._setTranslation(targetTranslation.x,targetTranslation.y); this._classicRedraw(); } Network.prototype.releaseNode = function () { if (this.lockedOnNodeId != null) { this._redraw = this._classicRedraw; this.lockedOnNodeId = null; this.lockedOnNodeOffset = null; } } /** * * @param easingTime * @private */ Network.prototype._transitionRedraw = function (easingTime) { this.easingTime = easingTime || this.easingTime + this.animationSpeed; this.easingTime += this.animationSpeed; var progress = util.easingFunctions[this.animationEasingFunction](this.easingTime); this._setScale(this.sourceScale + (this.targetScale - this.sourceScale) * progress); this._setTranslation( this.sourceTranslation.x + (this.targetTranslation.x - this.sourceTranslation.x) * progress, this.sourceTranslation.y + (this.targetTranslation.y - this.sourceTranslation.y) * progress ); this._classicRedraw(); this.moving = true; // cleanup if (this.easingTime >= 1.0) { this.easingTime = 0; if (this.lockedOnNodeId != null) { this._redraw = this._lockedRedraw; } else { this._redraw = this._classicRedraw; } this.emit("animationFinished"); } }; Network.prototype._classicRedraw = function () { // placeholder function to be overloaded by animations; }; /** * Returns true when the Network is active. * @returns {boolean} */ Network.prototype.isActive = function () { return !this.activator || this.activator.active; }; /** * Sets the scale * @returns {Number} */ Network.prototype.setScale = function () { return this._setScale(); }; /** * Returns the scale * @returns {Number} */ Network.prototype.getScale = function () { return this._getScale(); }; /** * Returns the scale * @returns {Number} */ Network.prototype.getCenterCoordinates = function () { return this.DOMtoCanvas({x: 0.5 * this.frame.canvas.clientWidth, y: 0.5 * this.frame.canvas.clientHeight}); }; module.exports = Network;