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2299 lines
67 KiB
2299 lines
67 KiB
/**
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* @constructor Network
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* Create a network visualization, displaying nodes and edges.
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*
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* @param {Element} container The DOM element in which the Network will
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* be created. Normally a div element.
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* @param {Object} data An object containing parameters
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* {Array} nodes
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* {Array} edges
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* @param {Object} options Options
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*/
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function Network (container, data, options) {
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if (!(this instanceof Network)) {
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throw new SyntaxError('Constructor must be called with the new operator');
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}
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this._initializeMixinLoaders();
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// create variables and set default values
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this.containerElement = container;
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this.width = '100%';
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this.height = '100%';
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// render and calculation settings
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this.renderRefreshRate = 60; // hz (fps)
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this.renderTimestep = 1000 / this.renderRefreshRate; // ms -- saves calculation later on
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this.renderTime = 0.5 * this.renderTimestep; // measured time it takes to render a frame
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this.maxPhysicsTicksPerRender = 3; // max amount of physics ticks per render step.
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this.physicsDiscreteStepsize = 0.50; // discrete stepsize of the simulation
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this.stabilize = true; // stabilize before displaying the network
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this.selectable = true;
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this.initializing = true;
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// these functions are triggered when the dataset is edited
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this.triggerFunctions = {add:null,edit:null,editEdge:null,connect:null,del:null};
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// set constant values
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this.constants = {
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nodes: {
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radiusMin: 5,
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radiusMax: 20,
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radius: 5,
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shape: 'ellipse',
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image: undefined,
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widthMin: 16, // px
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widthMax: 64, // px
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fixed: false,
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fontColor: 'black',
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fontSize: 14, // px
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fontFace: 'verdana',
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level: -1,
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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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borderColor: '#2B7CE9',
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backgroundColor: '#97C2FC',
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highlightColor: '#D2E5FF',
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group: undefined
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},
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edges: {
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widthMin: 1,
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widthMax: 15,
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width: 1,
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widthSelectionMultiplier: 2,
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hoverWidth: 1.5,
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style: 'line',
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color: {
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color:'#848484',
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highlight:'#848484',
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hover: '#848484'
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},
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fontColor: '#343434',
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fontSize: 14, // px
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fontFace: 'arial',
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fontFill: 'white',
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arrowScaleFactor: 1,
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dash: {
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length: 10,
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gap: 5,
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altLength: undefined
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}
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},
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configurePhysics:false,
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physics: {
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barnesHut: {
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enabled: true,
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theta: 1 / 0.6, // inverted to save time during calculation
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gravitationalConstant: -2000,
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centralGravity: 0.3,
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springLength: 95,
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springConstant: 0.04,
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damping: 0.09
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},
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repulsion: {
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centralGravity: 0.1,
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springLength: 200,
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springConstant: 0.05,
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nodeDistance: 100,
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damping: 0.09
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},
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hierarchicalRepulsion: {
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enabled: false,
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centralGravity: 0.5,
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springLength: 150,
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springConstant: 0.01,
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nodeDistance: 60,
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damping: 0.09
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},
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damping: null,
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centralGravity: null,
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springLength: null,
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springConstant: null
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},
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clustering: { // Per Node in Cluster = PNiC
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enabled: false, // (Boolean) | global on/off switch for clustering.
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initialMaxNodes: 100, // (# nodes) | if the initial amount of nodes is larger than this, we cluster until the total number is less than this threshold.
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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
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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
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chainThreshold: 0.4, // (% of all drawn nodes)| maximum percentage of allowed chainnodes (long strings of connected nodes) within all nodes. (lower means less chains).
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clusterEdgeThreshold: 20, // (px) | edge length threshold. if smaller, this node is clustered.
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sectorThreshold: 100, // (# nodes in cluster) | cluster size threshold. If larger, expanding in own sector.
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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.
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fontSizeMultiplier: 4.0, // (px PNiC) | how much the cluster font size grows per node in cluster (in px).
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maxFontSize: 1000,
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forceAmplification: 0.1, // (multiplier PNiC) | factor of increase fo the repulsion force of a cluster (per node in cluster).
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distanceAmplification: 0.1, // (multiplier PNiC) | factor how much the repulsion distance of a cluster increases (per node in cluster).
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edgeGrowth: 20, // (px PNiC) | amount of clusterSize connected to the edge is multiplied with this and added to edgeLength.
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nodeScaling: {width: 1, // (px PNiC) | growth of the width per node in cluster.
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height: 1, // (px PNiC) | growth of the height per node in cluster.
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radius: 1}, // (px PNiC) | growth of the radius per node in cluster.
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maxNodeSizeIncrements: 600, // (# increments) | max growth of the width per node in cluster.
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activeAreaBoxSize: 80, // (px) | box area around the curser where clusters are popped open.
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clusterLevelDifference: 2
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},
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navigation: {
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enabled: false
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},
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keyboard: {
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enabled: false,
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speed: {x: 10, y: 10, zoom: 0.02}
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},
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dataManipulation: {
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enabled: false,
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initiallyVisible: false
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},
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hierarchicalLayout: {
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enabled:false,
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levelSeparation: 150,
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nodeSpacing: 100,
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direction: "UD" // UD, DU, LR, RL
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},
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freezeForStabilization: false,
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smoothCurves: true,
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maxVelocity: 10,
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minVelocity: 0.1, // px/s
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stabilizationIterations: 1000, // maximum number of iteration to stabilize
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labels:{
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add:"Add Node",
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edit:"Edit",
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link:"Add Link",
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del:"Delete selected",
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editNode:"Edit Node",
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editEdge:"Edit Edge",
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back:"Back",
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addDescription:"Click in an empty space to place a new node.",
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linkDescription:"Click on a node and drag the edge to another node to connect them.",
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editEdgeDescription:"Click on the control points and drag them to a node to connect to it.",
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addError:"The function for add does not support two arguments (data,callback).",
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linkError:"The function for connect does not support two arguments (data,callback).",
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editError:"The function for edit does not support two arguments (data, callback).",
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editBoundError:"No edit function has been bound to this button.",
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deleteError:"The function for delete does not support two arguments (data, callback).",
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deleteClusterError:"Clusters cannot be deleted."
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},
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tooltip: {
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delay: 300,
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fontColor: 'black',
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fontSize: 14, // px
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fontFace: 'verdana',
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color: {
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border: '#666',
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background: '#FFFFC6'
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}
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},
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dragNetwork: true,
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dragNodes: true,
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zoomable: true,
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hover: false
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};
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this.hoverObj = {nodes:{},edges:{}};
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// Node variables
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var network = this;
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this.groups = new Groups(); // object with groups
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this.images = new Images(); // object with images
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this.images.setOnloadCallback(function () {
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network._redraw();
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});
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// keyboard navigation variables
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this.xIncrement = 0;
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this.yIncrement = 0;
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this.zoomIncrement = 0;
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// loading all the mixins:
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// load the force calculation functions, grouped under the physics system.
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this._loadPhysicsSystem();
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// create a frame and canvas
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this._create();
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// load the sector system. (mandatory, fully integrated with Network)
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this._loadSectorSystem();
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// load the cluster system. (mandatory, even when not using the cluster system, there are function calls to it)
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this._loadClusterSystem();
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// load the selection system. (mandatory, required by Network)
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this._loadSelectionSystem();
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// load the selection system. (mandatory, required by Network)
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this._loadHierarchySystem();
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// apply options
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this._setTranslation(this.frame.clientWidth / 2, this.frame.clientHeight / 2);
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this._setScale(1);
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this.setOptions(options);
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// other vars
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this.freezeSimulation = false;// freeze the simulation
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this.cachedFunctions = {};
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// containers for nodes and edges
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this.calculationNodes = {};
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this.calculationNodeIndices = [];
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this.nodeIndices = []; // array with all the indices of the nodes. Used to speed up forces calculation
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this.nodes = {}; // object with Node objects
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this.edges = {}; // object with Edge objects
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// position and scale variables and objects
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this.canvasTopLeft = {"x": 0,"y": 0}; // coordinates of the top left of the canvas. they will be set during _redraw.
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this.canvasBottomRight = {"x": 0,"y": 0}; // coordinates of the bottom right of the canvas. they will be set during _redraw
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this.pointerPosition = {"x": 0,"y": 0}; // coordinates of the bottom right of the canvas. they will be set during _redraw
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this.areaCenter = {}; // object with x and y elements used for determining the center of the zoom action
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this.scale = 1; // defining the global scale variable in the constructor
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this.previousScale = this.scale; // this is used to check if the zoom operation is zooming in or out
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// datasets or dataviews
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this.nodesData = null; // A DataSet or DataView
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this.edgesData = null; // A DataSet or DataView
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// create event listeners used to subscribe on the DataSets of the nodes and edges
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this.nodesListeners = {
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'add': function (event, params) {
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network._addNodes(params.items);
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network.start();
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},
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'update': function (event, params) {
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network._updateNodes(params.items);
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network.start();
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},
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'remove': function (event, params) {
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network._removeNodes(params.items);
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network.start();
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}
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};
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this.edgesListeners = {
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'add': function (event, params) {
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network._addEdges(params.items);
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network.start();
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},
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'update': function (event, params) {
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network._updateEdges(params.items);
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network.start();
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},
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'remove': function (event, params) {
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network._removeEdges(params.items);
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network.start();
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}
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};
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// properties for the animation
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this.moving = true;
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this.timer = undefined; // Scheduling function. Is definded in this.start();
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// load data (the disable start variable will be the same as the enabled clustering)
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this.setData(data,this.constants.clustering.enabled || this.constants.hierarchicalLayout.enabled);
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// hierarchical layout
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this.initializing = false;
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if (this.constants.hierarchicalLayout.enabled == true) {
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this._setupHierarchicalLayout();
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}
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else {
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// zoom so all data will fit on the screen, if clustering is enabled, we do not want start to be called here.
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if (this.stabilize == false) {
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this.zoomExtent(true,this.constants.clustering.enabled);
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}
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}
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// if clustering is disabled, the simulation will have started in the setData function
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if (this.constants.clustering.enabled) {
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this.startWithClustering();
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}
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}
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// Extend Network with an Emitter mixin
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Emitter(Network.prototype);
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/**
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* Get the script path where the vis.js library is located
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*
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* @returns {string | null} path Path or null when not found. Path does not
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* end with a slash.
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* @private
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*/
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Network.prototype._getScriptPath = function() {
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var scripts = document.getElementsByTagName( 'script' );
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// find script named vis.js or vis.min.js
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for (var i = 0; i < scripts.length; i++) {
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var src = scripts[i].src;
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var match = src && /\/?vis(.min)?\.js$/.exec(src);
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if (match) {
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// return path without the script name
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return src.substring(0, src.length - match[0].length);
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}
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}
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return null;
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};
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/**
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* Find the center position of the network
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* @private
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*/
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Network.prototype._getRange = function() {
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var minY = 1e9, maxY = -1e9, minX = 1e9, maxX = -1e9, node;
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for (var nodeId in this.nodes) {
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if (this.nodes.hasOwnProperty(nodeId)) {
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node = this.nodes[nodeId];
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if (minX > (node.x)) {minX = node.x;}
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if (maxX < (node.x)) {maxX = node.x;}
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if (minY > (node.y)) {minY = node.y;}
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if (maxY < (node.y)) {maxY = node.y;}
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}
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}
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if (minX == 1e9 && maxX == -1e9 && minY == 1e9 && maxY == -1e9) {
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minY = 0, maxY = 0, minX = 0, maxX = 0;
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}
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return {minX: minX, maxX: maxX, minY: minY, maxY: maxY};
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};
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/**
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* @param {object} range = {minX: minX, maxX: maxX, minY: minY, maxY: maxY};
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* @returns {{x: number, y: number}}
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* @private
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*/
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Network.prototype._findCenter = function(range) {
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return {x: (0.5 * (range.maxX + range.minX)),
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y: (0.5 * (range.maxY + range.minY))};
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};
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/**
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* center the network
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*
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* @param {object} range = {minX: minX, maxX: maxX, minY: minY, maxY: maxY};
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*/
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Network.prototype._centerNetwork = function(range) {
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var center = this._findCenter(range);
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center.x *= this.scale;
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center.y *= this.scale;
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center.x -= 0.5 * this.frame.canvas.clientWidth;
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center.y -= 0.5 * this.frame.canvas.clientHeight;
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this._setTranslation(-center.x,-center.y); // set at 0,0
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};
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/**
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* This function zooms out to fit all data on screen based on amount of nodes
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*
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* @param {Boolean} [initialZoom] | zoom based on fitted formula or range, true = fitted, default = false;
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* @param {Boolean} [disableStart] | If true, start is not called.
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*/
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Network.prototype.zoomExtent = function(initialZoom, disableStart) {
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if (initialZoom === undefined) {
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initialZoom = false;
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}
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if (disableStart === undefined) {
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disableStart = false;
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}
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var range = this._getRange();
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var zoomLevel;
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if (initialZoom == true) {
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var numberOfNodes = this.nodeIndices.length;
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if (this.constants.smoothCurves == true) {
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if (this.constants.clustering.enabled == true &&
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numberOfNodes >= this.constants.clustering.initialMaxNodes) {
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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.
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}
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else {
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zoomLevel = 12.662 / (numberOfNodes + 7.4147) + 0.0964822; // this is obtained from fitting a dataset from 5 points with scale levels that looked good.
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}
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}
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else {
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if (this.constants.clustering.enabled == true &&
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numberOfNodes >= this.constants.clustering.initialMaxNodes) {
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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.
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}
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else {
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zoomLevel = 30.5062972 / (numberOfNodes + 19.93597763) + 0.08413486; // this is obtained from fitting a dataset from 5 points with scale levels that looked good.
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}
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}
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// correct for larger canvasses.
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var factor = Math.min(this.frame.canvas.clientWidth / 600, this.frame.canvas.clientHeight / 600);
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zoomLevel *= factor;
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}
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else {
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var xDistance = (Math.abs(range.minX) + Math.abs(range.maxX)) * 1.1;
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var yDistance = (Math.abs(range.minY) + Math.abs(range.maxY)) * 1.1;
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var xZoomLevel = this.frame.canvas.clientWidth / xDistance;
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var yZoomLevel = this.frame.canvas.clientHeight / yDistance;
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zoomLevel = (xZoomLevel <= yZoomLevel) ? xZoomLevel : yZoomLevel;
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}
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if (zoomLevel > 1.0) {
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zoomLevel = 1.0;
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}
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this._setScale(zoomLevel);
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this._centerNetwork(range);
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if (disableStart == false) {
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this.moving = true;
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this.start();
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}
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};
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/**
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* Update the this.nodeIndices with the most recent node index list
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* @private
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*/
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Network.prototype._updateNodeIndexList = function() {
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this._clearNodeIndexList();
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for (var idx in this.nodes) {
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if (this.nodes.hasOwnProperty(idx)) {
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this.nodeIndices.push(idx);
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}
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}
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};
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/**
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* Set nodes and edges, and optionally options as well.
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*
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* @param {Object} data Object containing parameters:
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* {Array | DataSet | DataView} [nodes] Array with nodes
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* {Array | DataSet | DataView} [edges] Array with edges
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* {String} [dot] String containing data in DOT format
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* {Options} [options] Object with options
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* @param {Boolean} [disableStart] | optional: disable the calling of the start function.
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*/
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Network.prototype.setData = function(data, disableStart) {
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if (disableStart === undefined) {
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disableStart = false;
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}
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if (data && data.dot && (data.nodes || data.edges)) {
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throw new SyntaxError('Data must contain either parameter "dot" or ' +
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' parameter pair "nodes" and "edges", but not both.');
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}
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// set options
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this.setOptions(data && data.options);
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// set all data
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if (data && data.dot) {
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// parse DOT file
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if(data && data.dot) {
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var dotData = vis.util.DOTToGraph(data.dot);
|
|
this.setData(dotData);
|
|
return;
|
|
}
|
|
}
|
|
else {
|
|
this._setNodes(data && data.nodes);
|
|
this._setEdges(data && data.edges);
|
|
}
|
|
|
|
this._putDataInSector();
|
|
|
|
if (!disableStart) {
|
|
// find a stable position or start animating to a stable position
|
|
if (this.stabilize) {
|
|
var me = this;
|
|
setTimeout(function() {me._stabilize(); me.start();},0)
|
|
}
|
|
else {
|
|
this.start();
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Set options
|
|
* @param {Object} options
|
|
* @param {Boolean} [initializeView] | set zoom and translation to default.
|
|
*/
|
|
Network.prototype.setOptions = function (options) {
|
|
if (options) {
|
|
var prop;
|
|
// retrieve parameter values
|
|
if (options.width !== undefined) {this.width = options.width;}
|
|
if (options.height !== undefined) {this.height = options.height;}
|
|
if (options.stabilize !== undefined) {this.stabilize = options.stabilize;}
|
|
if (options.selectable !== undefined) {this.selectable = options.selectable;}
|
|
if (options.smoothCurves !== undefined) {this.constants.smoothCurves = options.smoothCurves;}
|
|
if (options.freezeForStabilization !== undefined) {this.constants.freezeForStabilization = options.freezeForStabilization;}
|
|
if (options.configurePhysics !== undefined){this.constants.configurePhysics = options.configurePhysics;}
|
|
if (options.stabilizationIterations !== undefined) {this.constants.stabilizationIterations = options.stabilizationIterations;}
|
|
if (options.dragNetwork !== undefined) {this.constants.dragNetwork = options.dragNetwork;}
|
|
if (options.dragNodes !== undefined) {this.constants.dragNodes = options.dragNodes;}
|
|
if (options.zoomable !== undefined) {this.constants.zoomable = options.zoomable;}
|
|
if (options.hover !== undefined) {this.constants.hover = options.hover;}
|
|
|
|
// TODO: deprecated since version 3.0.0. Cleanup some day
|
|
if (options.dragGraph !== undefined) {
|
|
throw new Error('Option dragGraph is renamed to dragNetwork');
|
|
}
|
|
|
|
if (options.labels !== undefined) {
|
|
for (prop in options.labels) {
|
|
if (options.labels.hasOwnProperty(prop)) {
|
|
this.constants.labels[prop] = options.labels[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;
|
|
}
|
|
|
|
if (options.physics) {
|
|
if (options.physics.barnesHut) {
|
|
this.constants.physics.barnesHut.enabled = true;
|
|
for (prop in options.physics.barnesHut) {
|
|
if (options.physics.barnesHut.hasOwnProperty(prop)) {
|
|
this.constants.physics.barnesHut[prop] = options.physics.barnesHut[prop];
|
|
}
|
|
}
|
|
}
|
|
|
|
if (options.physics.repulsion) {
|
|
this.constants.physics.barnesHut.enabled = false;
|
|
for (prop in options.physics.repulsion) {
|
|
if (options.physics.repulsion.hasOwnProperty(prop)) {
|
|
this.constants.physics.repulsion[prop] = options.physics.repulsion[prop];
|
|
}
|
|
}
|
|
}
|
|
|
|
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.hierarchicalLayout) {
|
|
this.constants.hierarchicalLayout.enabled = true;
|
|
for (prop in options.hierarchicalLayout) {
|
|
if (options.hierarchicalLayout.hasOwnProperty(prop)) {
|
|
this.constants.hierarchicalLayout[prop] = options.hierarchicalLayout[prop];
|
|
}
|
|
}
|
|
}
|
|
else if (options.hierarchicalLayout !== undefined) {
|
|
this.constants.hierarchicalLayout.enabled = false;
|
|
}
|
|
|
|
if (options.clustering) {
|
|
this.constants.clustering.enabled = true;
|
|
for (prop in options.clustering) {
|
|
if (options.clustering.hasOwnProperty(prop)) {
|
|
this.constants.clustering[prop] = options.clustering[prop];
|
|
}
|
|
}
|
|
}
|
|
else if (options.clustering !== undefined) {
|
|
this.constants.clustering.enabled = false;
|
|
}
|
|
|
|
if (options.navigation) {
|
|
this.constants.navigation.enabled = true;
|
|
for (prop in options.navigation) {
|
|
if (options.navigation.hasOwnProperty(prop)) {
|
|
this.constants.navigation[prop] = options.navigation[prop];
|
|
}
|
|
}
|
|
}
|
|
else if (options.navigation !== undefined) {
|
|
this.constants.navigation.enabled = false;
|
|
}
|
|
|
|
if (options.keyboard) {
|
|
this.constants.keyboard.enabled = true;
|
|
for (prop in options.keyboard) {
|
|
if (options.keyboard.hasOwnProperty(prop)) {
|
|
this.constants.keyboard[prop] = options.keyboard[prop];
|
|
}
|
|
}
|
|
}
|
|
else if (options.keyboard !== undefined) {
|
|
this.constants.keyboard.enabled = false;
|
|
}
|
|
|
|
if (options.dataManipulation) {
|
|
this.constants.dataManipulation.enabled = true;
|
|
for (prop in options.dataManipulation) {
|
|
if (options.dataManipulation.hasOwnProperty(prop)) {
|
|
this.constants.dataManipulation[prop] = options.dataManipulation[prop];
|
|
}
|
|
}
|
|
this.editMode = this.constants.dataManipulation.initiallyVisible;
|
|
}
|
|
else if (options.dataManipulation !== undefined) {
|
|
this.constants.dataManipulation.enabled = false;
|
|
}
|
|
|
|
// TODO: work out these options and document them
|
|
if (options.edges) {
|
|
for (prop in options.edges) {
|
|
if (options.edges.hasOwnProperty(prop)) {
|
|
if (typeof options.edges[prop] != "object") {
|
|
this.constants.edges[prop] = options.edges[prop];
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
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;}
|
|
}
|
|
}
|
|
|
|
// Added to support dashed lines
|
|
// David Jordan
|
|
// 2012-08-08
|
|
if (options.edges.dash) {
|
|
if (options.edges.dash.length !== undefined) {
|
|
this.constants.edges.dash.length = options.edges.dash.length;
|
|
}
|
|
if (options.edges.dash.gap !== undefined) {
|
|
this.constants.edges.dash.gap = options.edges.dash.gap;
|
|
}
|
|
if (options.edges.dash.altLength !== undefined) {
|
|
this.constants.edges.dash.altLength = options.edges.dash.altLength;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (options.nodes) {
|
|
for (prop in options.nodes) {
|
|
if (options.nodes.hasOwnProperty(prop)) {
|
|
this.constants.nodes[prop] = options.nodes[prop];
|
|
}
|
|
}
|
|
|
|
if (options.nodes.color) {
|
|
this.constants.nodes.color = util.parseColor(options.nodes.color);
|
|
}
|
|
|
|
/*
|
|
if (options.nodes.widthMin) this.constants.nodes.radiusMin = options.nodes.widthMin;
|
|
if (options.nodes.widthMax) this.constants.nodes.radiusMax = options.nodes.widthMax;
|
|
*/
|
|
}
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
// (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.width, this.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 = 'network-frame';
|
|
this.frame.style.position = 'relative';
|
|
this.frame.style.overflow = 'hidden';
|
|
|
|
// create the network canvas (HTML canvas element)
|
|
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);
|
|
}
|
|
|
|
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('release', me._onRelease.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) );
|
|
|
|
// 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;
|
|
this.mousetrap = mousetrap;
|
|
|
|
this.mousetrap.reset();
|
|
|
|
if (this.constants.keyboard.enabled == true) {
|
|
this.mousetrap.bind("up", this._moveUp.bind(me) , "keydown");
|
|
this.mousetrap.bind("up", this._yStopMoving.bind(me), "keyup");
|
|
this.mousetrap.bind("down", this._moveDown.bind(me) , "keydown");
|
|
this.mousetrap.bind("down", this._yStopMoving.bind(me), "keyup");
|
|
this.mousetrap.bind("left", this._moveLeft.bind(me) , "keydown");
|
|
this.mousetrap.bind("left", this._xStopMoving.bind(me), "keyup");
|
|
this.mousetrap.bind("right",this._moveRight.bind(me), "keydown");
|
|
this.mousetrap.bind("right",this._xStopMoving.bind(me), "keyup");
|
|
this.mousetrap.bind("=", this._zoomIn.bind(me), "keydown");
|
|
this.mousetrap.bind("=", this._stopZoom.bind(me), "keyup");
|
|
this.mousetrap.bind("-", this._zoomOut.bind(me), "keydown");
|
|
this.mousetrap.bind("-", this._stopZoom.bind(me), "keyup");
|
|
this.mousetrap.bind("[", this._zoomIn.bind(me), "keydown");
|
|
this.mousetrap.bind("[", this._stopZoom.bind(me), "keyup");
|
|
this.mousetrap.bind("]", this._zoomOut.bind(me), "keydown");
|
|
this.mousetrap.bind("]", this._stopZoom.bind(me), "keyup");
|
|
this.mousetrap.bind("pageup",this._zoomIn.bind(me), "keydown");
|
|
this.mousetrap.bind("pageup",this._stopZoom.bind(me), "keyup");
|
|
this.mousetrap.bind("pagedown",this._zoomOut.bind(me),"keydown");
|
|
this.mousetrap.bind("pagedown",this._stopZoom.bind(me), "keyup");
|
|
}
|
|
|
|
if (this.constants.dataManipulation.enabled == true) {
|
|
this.mousetrap.bind("escape",this._createManipulatorBar.bind(me));
|
|
this.mousetrap.bind("del",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 - vis.util.getAbsoluteLeft(this.frame.canvas),
|
|
y: touch.pageY - vis.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;
|
|
|
|
if (node != null) {
|
|
drag.nodeId = node.id;
|
|
// select the clicked node if not yet selected
|
|
if (!node.isSelected()) {
|
|
this._selectObject(node,false);
|
|
}
|
|
|
|
// 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;
|
|
}
|
|
|
|
var pointer = this._getPointer(event.gesture.center);
|
|
|
|
var me = this,
|
|
drag = this.drag,
|
|
selection = drag.selection;
|
|
if (selection && selection.length && this.constants.dragNodes == true) {
|
|
// calculate delta's and new location
|
|
var deltaX = pointer.x - drag.pointer.x,
|
|
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 () {
|
|
this.drag.dragging = false;
|
|
var selection = this.drag.selection;
|
|
if (selection) {
|
|
selection.forEach(function (s) {
|
|
// restore original xFixed and yFixed
|
|
s.node.xFixed = s.xFixed;
|
|
s.node.yFixed = s.yFixed;
|
|
});
|
|
}
|
|
};
|
|
|
|
/**
|
|
* 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;
|
|
}
|
|
// + 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();
|
|
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 = util.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 = util.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) {
|
|
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.frame.canvas.height = this.frame.canvas.clientHeight;
|
|
|
|
if (this.manipulationDiv !== undefined) {
|
|
this.manipulationDiv.style.width = this.frame.canvas.clientWidth + "px";
|
|
}
|
|
if (this.navigationDivs !== undefined) {
|
|
if (this.navigationDivs['wrapper'] !== undefined) {
|
|
this.navigationDivs['wrapper'].style.width = this.frame.canvas.clientWidth + "px";
|
|
this.navigationDivs['wrapper'].style.height = this.frame.canvas.clientHeight + "px";
|
|
}
|
|
}
|
|
|
|
this.emit('resize', {width:this.frame.canvas.width,height:this.frame.canvas.height});
|
|
};
|
|
|
|
/**
|
|
* 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 (nodes instanceof Array) {
|
|
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;
|
|
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) {
|
|
var nodes = this.nodes,
|
|
nodesData = this.nodesData;
|
|
for (var i = 0, len = ids.length; i < len; i++) {
|
|
var id = ids[i];
|
|
var node = nodes[id];
|
|
var data = nodesData.get(id);
|
|
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._reconnectEdges();
|
|
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 (edges instanceof Array) {
|
|
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();
|
|
if (this.constants.hierarchicalLayout.enabled == true && this.initializing == false) {
|
|
this._resetLevels();
|
|
this._setupHierarchicalLayout();
|
|
}
|
|
this._updateCalculationNodes();
|
|
};
|
|
|
|
/**
|
|
* 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 = [];
|
|
}
|
|
}
|
|
|
|
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.width, this.height);
|
|
this._redraw();
|
|
};
|
|
|
|
/**
|
|
* Redraw the network with the current data
|
|
* @private
|
|
*/
|
|
Network.prototype._redraw = function() {
|
|
var ctx = this.frame.canvas.getContext('2d');
|
|
// clear the canvas
|
|
var w = this.frame.canvas.width;
|
|
var h = this.frame.canvas.height;
|
|
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),
|
|
"y": this._YconvertDOMtoCanvas(this.frame.canvas.clientHeight)
|
|
};
|
|
|
|
this._doInAllSectors("_drawAllSectorNodes",ctx);
|
|
this._doInAllSectors("_drawEdges",ctx);
|
|
this._doInAllSectors("_drawNodes",ctx,false);
|
|
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(false,true);
|
|
if (this.constants.freezeForStabilization == true) {
|
|
this._restoreFrozenNodes();
|
|
}
|
|
this.emit("stabilized",{iterations:count});
|
|
};
|
|
|
|
/**
|
|
* 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) {
|
|
this.moving = true;
|
|
}
|
|
else {
|
|
this.moving = this._isMoving(vminCorrected);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* A single simulation step (or "tick") in the physics simulation
|
|
*
|
|
* @private
|
|
*/
|
|
Network.prototype._physicsTick = function() {
|
|
if (!this.freezeSimulation) {
|
|
if (this.moving) {
|
|
this._doInAllActiveSectors("_initializeForceCalculation");
|
|
this._doInAllActiveSectors("_discreteStepNodes");
|
|
if (this.constants.smoothCurves) {
|
|
this._doInSupportSector("_discreteStepNodes");
|
|
}
|
|
this._findCenter(this._getRange())
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* 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 || this.xIncrement != 0 || this.yIncrement != 0 || this.zoomIncrement != 0) {
|
|
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();
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
* 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 == true) {
|
|
this._createBezierNodes();
|
|
}
|
|
else {
|
|
// delete the support nodes
|
|
this.sectors['support']['nodes'] = {};
|
|
for (var edgeId in this.edges) {
|
|
if (this.edges.hasOwnProperty(edgeId)) {
|
|
this.edges[edgeId].smooth = false;
|
|
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 == true) {
|
|
for (var edgeId in this.edges) {
|
|
if (this.edges.hasOwnProperty(edgeId)) {
|
|
var edge = this.edges[edgeId];
|
|
if (edge.via == null) {
|
|
edge.smooth = true;
|
|
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 mixinFunction in networkMixinLoaders) {
|
|
if (networkMixinLoaders.hasOwnProperty(mixinFunction)) {
|
|
Network.prototype[mixinFunction] = networkMixinLoaders[mixinFunction];
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Load the XY positions of the nodes into the dataset.
|
|
*/
|
|
Network.prototype.storePosition = 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);
|
|
};
|
|
|
|
|
|
/**
|
|
* Center a node in view.
|
|
*
|
|
* @param {Number} nodeId
|
|
* @param {Number} [zoomLevel]
|
|
*/
|
|
Network.prototype.focusOnNode = function (nodeId, zoomLevel) {
|
|
if (this.nodes.hasOwnProperty(nodeId)) {
|
|
if (zoomLevel === undefined) {
|
|
zoomLevel = this._getScale();
|
|
}
|
|
var nodePosition= {x: this.nodes[nodeId].x, y: this.nodes[nodeId].y};
|
|
|
|
var requiredScale = zoomLevel;
|
|
this._setScale(requiredScale);
|
|
|
|
var canvasCenter = this.DOMtoCanvas({x:0.5 * this.frame.canvas.width,y:0.5 * this.frame.canvas.height});
|
|
var translation = this._getTranslation();
|
|
|
|
var distanceFromCenter = {x:canvasCenter.x - nodePosition.x,
|
|
y:canvasCenter.y - nodePosition.y};
|
|
|
|
this._setTranslation(translation.x + requiredScale * distanceFromCenter.x,
|
|
translation.y + requiredScale * distanceFromCenter.y);
|
|
this.redraw();
|
|
}
|
|
else {
|
|
console.log("This nodeId cannot be found.")
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|