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989 lines
33 KiB
989 lines
33 KiB
var util = require('../util');
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/**
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* @class Node
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* A node. A node can be connected to other nodes via one or multiple edges.
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* @param {object} properties An object containing properties for the node. All
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* properties are optional, except for the id.
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* {number} id Id of the node. Required
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* {string} label Text label for the node
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* {number} x Horizontal position of the node
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* {number} y Vertical position of the node
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* {string} shape Node shape, available:
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* "database", "circle", "ellipse",
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* "box", "image", "text", "dot",
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* "star", "triangle", "triangleDown",
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* "square", "icon"
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* {string} image An image url
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* {string} title An title text, can be HTML
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* {anytype} group A group name or number
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* @param {Network.Images} imagelist A list with images. Only needed
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* when the node has an image
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* @param {Network.Groups} grouplist A list with groups. Needed for
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* retrieving group properties
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* @param {Object} constants An object with default values for
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* example for the color
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*
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*/
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function Node(properties, imagelist, grouplist, networkConstants) {
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var constants = util.selectiveBridgeObject(['nodes'],networkConstants);
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this.options = constants.nodes;
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this.selected = false;
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this.hover = false;
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this.edges = []; // all edges connected to this node
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// set defaults for the properties
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this.id = undefined;
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this.allowedToMoveX = false;
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this.allowedToMoveY = false;
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this.xFixed = false;
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this.yFixed = false;
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this.horizontalAlignLeft = true; // these are for the navigation controls
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this.verticalAlignTop = true; // these are for the navigation controls
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this.baseRadiusValue = networkConstants.nodes.radius;
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this.radiusFixed = false;
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this.level = -1;
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this.preassignedLevel = false;
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this.hierarchyEnumerated = false;
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this.labelDimensions = {top:0, left:0, width:0, height:0, yLine:0}; // could be cached
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this.boundingBox = {top:0, left:0, right:0, bottom:0};
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this.imagelist = imagelist;
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this.grouplist = grouplist;
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// physics properties
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this.fx = 0.0; // external force x
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this.fy = 0.0; // external force y
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this.vx = 0.0; // velocity x
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this.vy = 0.0; // velocity y
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this.x = null;
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this.y = null;
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this.predefinedPosition = false; // used to check if initial zoomExtent should just take the range or approximate
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// used for reverting to previous position on stabilization
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this.previousState = {vx:0,vy:0,x:0,y:0};
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this.damping = networkConstants.physics.damping; // written every time gravity is calculated
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this.fixedData = {x:null,y:null};
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this.setProperties(properties, constants);
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// variables to tell the node about the network.
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this.networkScaleInv = 1;
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this.networkScale = 1;
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this.canvasTopLeft = {"x": -300, "y": -300};
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this.canvasBottomRight = {"x": 300, "y": 300};
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this.parentEdgeId = null;
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}
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/**
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* Attach a edge to the node
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* @param {Edge} edge
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*/
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Node.prototype.attachEdge = function(edge) {
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if (this.edges.indexOf(edge) == -1) {
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this.edges.push(edge);
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}
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};
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/**
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* Detach a edge from the node
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* @param {Edge} edge
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*/
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Node.prototype.detachEdge = function(edge) {
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var index = this.edges.indexOf(edge);
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if (index != -1) {
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this.edges.splice(index, 1);
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}
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};
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/**
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* Set or overwrite properties for the node
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* @param {Object} properties an object with properties
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* @param {Object} constants and object with default, global properties
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*/
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Node.prototype.setProperties = function(properties, constants) {
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if (!properties) {
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return;
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}
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this.properties = properties;
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var fields = ['borderWidth', 'borderWidthSelected', 'shape', 'image', 'brokenImage', 'radius', 'fontColor',
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'fontSize', 'fontFace', 'fontFill', 'fontStrokeWidth', 'fontStrokeColor', 'group', 'mass', 'fontDrawThreshold',
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'scaleFontWithValue', 'fontSizeMaxVisible', 'customScalingFunction', 'iconFontFace', 'icon', 'iconColor', 'iconSize',
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'value'
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];
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util.selectiveDeepExtend(fields, this.options, properties);
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// basic properties
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if (properties.id !== undefined) {this.id = properties.id;}
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if (properties.label !== undefined) {this.label = properties.label; this.originalLabel = properties.label;}
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if (properties.title !== undefined) {this.title = properties.title;}
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if (properties.x !== undefined) {this.x = properties.x; this.predefinedPosition = true;}
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if (properties.y !== undefined) {this.y = properties.y; this.predefinedPosition = true;}
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if (properties.value !== undefined) {this.value = properties.value;}
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if (properties.level !== undefined) {this.level = properties.level; this.preassignedLevel = true;}
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// navigation controls properties
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if (properties.horizontalAlignLeft !== undefined) {this.horizontalAlignLeft = properties.horizontalAlignLeft;}
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if (properties.verticalAlignTop !== undefined) {this.verticalAlignTop = properties.verticalAlignTop;}
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if (properties.triggerFunction !== undefined) {this.triggerFunction = properties.triggerFunction;}
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if (this.id === undefined) {
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throw "Node must have an id";
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}
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// copy group properties
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if (typeof properties.group === 'number' || (typeof properties.group === 'string' && properties.group != '')) {
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var groupObj = this.grouplist.get(properties.group);
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util.deepExtend(this.options, groupObj);
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// the color object needs to be completely defined. Since groups can partially overwrite the colors, we parse it again, just in case.
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this.options.color = util.parseColor(this.options.color);
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}
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// individual shape properties
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if (properties.radius !== undefined) {this.baseRadiusValue = this.options.radius;}
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if (properties.color !== undefined) {this.options.color = util.parseColor(properties.color);}
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if (this.options.image !== undefined && this.options.image!= "") {
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if (this.imagelist) {
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this.imageObj = this.imagelist.load(this.options.image, this.options.brokenImage);
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}
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else {
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throw "No imagelist provided";
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}
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}
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if (properties.allowedToMoveX !== undefined) {
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this.xFixed = !properties.allowedToMoveX;
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this.allowedToMoveX = properties.allowedToMoveX;
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}
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else if (properties.x !== undefined && this.allowedToMoveX == false) {
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this.xFixed = true;
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}
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if (properties.allowedToMoveY !== undefined) {
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this.yFixed = !properties.allowedToMoveY;
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this.allowedToMoveY = properties.allowedToMoveY;
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}
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else if (properties.y !== undefined && this.allowedToMoveY == false) {
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this.yFixed = true;
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}
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this.radiusFixed = this.radiusFixed || (properties.radius !== undefined);
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if (this.options.shape === 'image' || this.options.shape === 'circularImage') {
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this.options.radiusMin = constants.nodes.widthMin;
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this.options.radiusMax = constants.nodes.widthMax;
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}
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// choose draw method depending on the shape
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switch (this.options.shape) {
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case 'database': this.draw = this._drawDatabase; this.resize = this._resizeDatabase; break;
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case 'box': this.draw = this._drawBox; this.resize = this._resizeBox; break;
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case 'circle': this.draw = this._drawCircle; this.resize = this._resizeCircle; break;
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case 'ellipse': this.draw = this._drawEllipse; this.resize = this._resizeEllipse; break;
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// TODO: add diamond shape
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case 'image': this.draw = this._drawImage; this.resize = this._resizeImage; break;
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case 'circularImage': this.draw = this._drawCircularImage; this.resize = this._resizeCircularImage; break;
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case 'text': this.draw = this._drawText; this.resize = this._resizeText; break;
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case 'dot': this.draw = this._drawDot; this.resize = this._resizeShape; break;
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case 'square': this.draw = this._drawSquare; this.resize = this._resizeShape; break;
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case 'triangle': this.draw = this._drawTriangle; this.resize = this._resizeShape; break;
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case 'triangleDown': this.draw = this._drawTriangleDown; this.resize = this._resizeShape; break;
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case 'star': this.draw = this._drawStar; this.resize = this._resizeShape; break;
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case 'icon': this.draw = this._drawIcon; this.resize = this._resizeIcon; break;
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default: this.draw = this._drawEllipse; this.resize = this._resizeEllipse; break;
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}
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// reset the size of the node, this can be changed
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this._reset();
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};
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/**
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* select this node
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*/
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Node.prototype.select = function() {
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this.selected = true;
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this._reset();
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};
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/**
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* unselect this node
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*/
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Node.prototype.unselect = function() {
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this.selected = false;
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this._reset();
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};
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/**
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* Reset the calculated size of the node, forces it to recalculate its size
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*/
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Node.prototype.clearSizeCache = function() {
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this._reset();
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};
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/**
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* Reset the calculated size of the node, forces it to recalculate its size
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* @private
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*/
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Node.prototype._reset = function() {
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this.width = undefined;
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this.height = undefined;
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};
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/**
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* get the title of this node.
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* @return {string} title The title of the node, or undefined when no title
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* has been set.
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*/
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Node.prototype.getTitle = function() {
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return typeof this.title === "function" ? this.title() : this.title;
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};
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/**
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* Calculate the distance to the border of the Node
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* @param {CanvasRenderingContext2D} ctx
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* @param {Number} angle Angle in radians
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* @returns {number} distance Distance to the border in pixels
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*/
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Node.prototype.distanceToBorder = function (ctx, angle) {
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var borderWidth = 1;
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if (!this.width) {
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this.resize(ctx);
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}
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switch (this.options.shape) {
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case 'circle':
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case 'dot':
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return this.options.radius+ borderWidth;
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case 'ellipse':
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var a = this.width / 2;
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var b = this.height / 2;
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var w = (Math.sin(angle) * a);
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var h = (Math.cos(angle) * b);
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return a * b / Math.sqrt(w * w + h * h);
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// TODO: implement distanceToBorder for database
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// TODO: implement distanceToBorder for triangle
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// TODO: implement distanceToBorder for triangleDown
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case 'box':
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case 'image':
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case 'text':
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default:
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if (this.width) {
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return Math.min(
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Math.abs(this.width / 2 / Math.cos(angle)),
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Math.abs(this.height / 2 / Math.sin(angle))) + borderWidth;
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// TODO: reckon with border radius too in case of box
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}
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else {
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return 0;
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}
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}
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// TODO: implement calculation of distance to border for all shapes
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};
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/**
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* Check if this node has a fixed x and y position
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* @return {boolean} true if fixed, false if not
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*/
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Node.prototype.isFixed = function() {
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return (this.xFixed && this.yFixed);
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};
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/**
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* check if this node is selecte
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* @return {boolean} selected True if node is selected, else false
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*/
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Node.prototype.isSelected = function() {
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return this.selected;
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};
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/**
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* Retrieve the value of the node. Can be undefined
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* @return {Number} value
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*/
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Node.prototype.getValue = function() {
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return this.value;
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};
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/**
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* Calculate the distance from the nodes location to the given location (x,y)
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* @param {Number} x
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* @param {Number} y
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* @return {Number} value
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*/
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Node.prototype.getDistance = function(x, y) {
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var dx = this.x - x,
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dy = this.y - y;
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return Math.sqrt(dx * dx + dy * dy);
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};
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/**
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* Adjust the value range of the node. The node will adjust it's radius
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* based on its value.
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* @param {Number} min
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* @param {Number} max
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*/
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Node.prototype.setValueRange = function(min, max, total) {
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if (!this.radiusFixed && this.value !== undefined) {
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var scale = this.options.customScalingFunction(min, max, total, this.value);
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var radiusDiff = this.options.radiusMax - this.options.radiusMin;
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if (this.options.scaleFontWithValue == true) {
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var fontDiff = this.options.fontSizeMax - this.options.fontSizeMin;
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this.options.fontSize = this.options.fontSizeMin + scale * fontDiff;
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}
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this.options.radius = this.options.radiusMin + scale * radiusDiff;
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}
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this.baseRadiusValue = this.options.radius;
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};
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/**
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* Draw this node in the given canvas
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* The 2d context of a HTML canvas can be retrieved by canvas.getContext("2d");
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* @param {CanvasRenderingContext2D} ctx
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*/
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Node.prototype.draw = function(ctx) {
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throw "Draw method not initialized for node";
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};
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/**
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* Recalculate the size of this node in the given canvas
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* The 2d context of a HTML canvas can be retrieved by canvas.getContext("2d");
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* @param {CanvasRenderingContext2D} ctx
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*/
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Node.prototype.resize = function(ctx) {
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throw "Resize method not initialized for node";
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};
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/**
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* Check if this object is overlapping with the provided object
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* @param {Object} obj an object with parameters left, top, right, bottom
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* @return {boolean} True if location is located on node
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*/
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Node.prototype.isOverlappingWith = function(obj) {
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return (this.left < obj.right &&
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this.left + this.width > obj.left &&
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this.top < obj.bottom &&
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this.top + this.height > obj.top);
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};
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Node.prototype._resizeImage = function (ctx) {
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// TODO: pre calculate the image size
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if (!this.width || !this.height) { // undefined or 0
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var width, height;
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if (this.value) {
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this.options.radius= this.baseRadiusValue;
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var scale = this.imageObj.height / this.imageObj.width;
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if (scale !== undefined) {
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width = this.options.radius|| this.imageObj.width;
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height = this.options.radius* scale || this.imageObj.height;
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}
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else {
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width = 0;
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height = 0;
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}
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}
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else {
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width = this.imageObj.width;
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height = this.imageObj.height;
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}
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this.width = width;
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this.height = height;
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}
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};
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Node.prototype._drawImageAtPosition = function (ctx) {
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if (this.imageObj.width != 0 ) {
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// draw the image
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ctx.globalAlpha = 1.0;
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ctx.drawImage(this.imageObj, this.left, this.top, this.width, this.height);
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}
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};
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Node.prototype._drawImageLabel = function (ctx) {
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var yLabel;
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var offset = 0;
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if (this.height){
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offset = this.height / 2;
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var labelDimensions = this.getTextSize(ctx);
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if (labelDimensions.lineCount >= 1){
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offset += labelDimensions.height / 2;
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offset += 3;
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}
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}
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yLabel = this.y + offset;
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this._label(ctx, this.label, this.x, yLabel, undefined);
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};
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Node.prototype._drawImage = function (ctx) {
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this._resizeImage(ctx);
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this.left = this.x - this.width / 2;
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this.top = this.y - this.height / 2;
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this._drawImageAtPosition(ctx);
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this.boundingBox.top = this.top;
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this.boundingBox.left = this.left;
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this.boundingBox.right = this.left + this.width;
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this.boundingBox.bottom = this.top + this.height;
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this._drawImageLabel(ctx);
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this.boundingBox.left = Math.min(this.boundingBox.left, this.labelDimensions.left);
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this.boundingBox.right = Math.max(this.boundingBox.right, this.labelDimensions.left + this.labelDimensions.width);
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this.boundingBox.bottom = Math.max(this.boundingBox.bottom, this.boundingBox.bottom + this.labelDimensions.height);
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};
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Node.prototype._resizeCircularImage = function (ctx) {
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if(!this.imageObj.src || !this.imageObj.width || !this.imageObj.height){
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if (!this.width) {
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var diameter = this.options.radius * 2;
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this.width = diameter;
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this.height = diameter;
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this._swapToImageResizeWhenImageLoaded = true;
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}
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}
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else {
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if (this._swapToImageResizeWhenImageLoaded) {
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this.width = 0;
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this.height = 0;
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delete this._swapToImageResizeWhenImageLoaded;
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}
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this._resizeImage(ctx);
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}
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};
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Node.prototype._drawCircularImage = function (ctx) {
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this._resizeCircularImage(ctx);
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this.left = this.x - this.width / 2;
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this.top = this.y - this.height / 2;
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var centerX = this.left + (this.width / 2);
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var centerY = this.top + (this.height / 2);
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var radius = Math.abs(this.height / 2);
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this._drawRawCircle(ctx, centerX, centerY, radius);
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ctx.save();
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ctx.circle(this.x, this.y, radius);
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ctx.stroke();
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ctx.clip();
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this._drawImageAtPosition(ctx);
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ctx.restore();
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this.boundingBox.top = this.y - this.options.radius;
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this.boundingBox.left = this.x - this.options.radius;
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this.boundingBox.right = this.x + this.options.radius;
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this.boundingBox.bottom = this.y + this.options.radius;
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this._drawImageLabel(ctx);
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this.boundingBox.left = Math.min(this.boundingBox.left, this.labelDimensions.left);
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this.boundingBox.right = Math.max(this.boundingBox.right, this.labelDimensions.left + this.labelDimensions.width);
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this.boundingBox.bottom = Math.max(this.boundingBox.bottom, this.boundingBox.bottom + this.labelDimensions.height);
|
|
};
|
|
|
|
Node.prototype._resizeBox = function (ctx) {
|
|
if (!this.width) {
|
|
var margin = 5;
|
|
var textSize = this.getTextSize(ctx);
|
|
this.width = textSize.width + 2 * margin;
|
|
this.height = textSize.height + 2 * margin;
|
|
}
|
|
};
|
|
|
|
Node.prototype._drawBox = function (ctx) {
|
|
this._resizeBox(ctx);
|
|
|
|
this.left = this.x - this.width / 2;
|
|
this.top = this.y - this.height / 2;
|
|
|
|
var borderWidth = this.options.borderWidth;
|
|
var selectionLineWidth = this.options.borderWidthSelected || 2 * this.options.borderWidth;
|
|
|
|
ctx.strokeStyle = this.selected ? this.options.color.highlight.border : this.hover ? this.options.color.hover.border : this.options.color.border;
|
|
ctx.lineWidth = (this.selected ? selectionLineWidth : borderWidth);
|
|
ctx.lineWidth *= this.networkScaleInv;
|
|
ctx.lineWidth = Math.min(this.width,ctx.lineWidth);
|
|
|
|
ctx.fillStyle = this.selected ? this.options.color.highlight.background : this.hover ? this.options.color.hover.background : this.options.color.background;
|
|
|
|
ctx.roundRect(this.left, this.top, this.width, this.height, this.options.radius);
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
|
|
this.boundingBox.top = this.top;
|
|
this.boundingBox.left = this.left;
|
|
this.boundingBox.right = this.left + this.width;
|
|
this.boundingBox.bottom = this.top + this.height;
|
|
|
|
this._label(ctx, this.label, this.x, this.y);
|
|
};
|
|
|
|
|
|
Node.prototype._resizeDatabase = function (ctx) {
|
|
if (!this.width) {
|
|
var margin = 5;
|
|
var textSize = this.getTextSize(ctx);
|
|
var size = textSize.width + 2 * margin;
|
|
this.width = size;
|
|
this.height = size;
|
|
}
|
|
};
|
|
|
|
Node.prototype._drawDatabase = function (ctx) {
|
|
this._resizeDatabase(ctx);
|
|
this.left = this.x - this.width / 2;
|
|
this.top = this.y - this.height / 2;
|
|
|
|
var borderWidth = this.options.borderWidth;
|
|
var selectionLineWidth = this.options.borderWidthSelected || 2 * this.options.borderWidth;
|
|
|
|
ctx.strokeStyle = this.selected ? this.options.color.highlight.border : this.hover ? this.options.color.hover.border : this.options.color.border;
|
|
ctx.lineWidth = (this.selected ? selectionLineWidth : borderWidth);
|
|
ctx.lineWidth *= this.networkScaleInv;
|
|
ctx.lineWidth = Math.min(this.width,ctx.lineWidth);
|
|
|
|
ctx.fillStyle = this.selected ? this.options.color.highlight.background : this.hover ? this.options.color.hover.background : this.options.color.background;
|
|
ctx.database(this.x - this.width/2, this.y - this.height*0.5, this.width, this.height);
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
|
|
this.boundingBox.top = this.top;
|
|
this.boundingBox.left = this.left;
|
|
this.boundingBox.right = this.left + this.width;
|
|
this.boundingBox.bottom = this.top + this.height;
|
|
|
|
this._label(ctx, this.label, this.x, this.y);
|
|
};
|
|
|
|
|
|
Node.prototype._resizeCircle = function (ctx) {
|
|
if (!this.width) {
|
|
var margin = 5;
|
|
var textSize = this.getTextSize(ctx);
|
|
var diameter = Math.max(textSize.width, textSize.height) + 2 * margin;
|
|
this.options.radius = diameter / 2;
|
|
|
|
this.width = diameter;
|
|
this.height = diameter;
|
|
}
|
|
};
|
|
|
|
Node.prototype._drawRawCircle = function (ctx, x, y, radius) {
|
|
var borderWidth = this.options.borderWidth;
|
|
var selectionLineWidth = this.options.borderWidthSelected || 2 * this.options.borderWidth;
|
|
|
|
ctx.strokeStyle = this.selected ? this.options.color.highlight.border : this.hover ? this.options.color.hover.border : this.options.color.border;
|
|
|
|
ctx.lineWidth = (this.selected ? selectionLineWidth : borderWidth);
|
|
ctx.lineWidth *= this.networkScaleInv;
|
|
ctx.lineWidth = Math.min(this.width,ctx.lineWidth);
|
|
|
|
ctx.fillStyle = this.selected ? this.options.color.highlight.background : this.hover ? this.options.color.hover.background : this.options.color.background;
|
|
ctx.circle(this.x, this.y, radius);
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
};
|
|
|
|
Node.prototype._drawCircle = function (ctx) {
|
|
this._resizeCircle(ctx);
|
|
this.left = this.x - this.width / 2;
|
|
this.top = this.y - this.height / 2;
|
|
|
|
this._drawRawCircle(ctx, this.x, this.y, this.options.radius);
|
|
|
|
this.boundingBox.top = this.y - this.options.radius;
|
|
this.boundingBox.left = this.x - this.options.radius;
|
|
this.boundingBox.right = this.x + this.options.radius;
|
|
this.boundingBox.bottom = this.y + this.options.radius;
|
|
|
|
this._label(ctx, this.label, this.x, this.y);
|
|
};
|
|
|
|
Node.prototype._resizeEllipse = function (ctx) {
|
|
if (!this.width) {
|
|
var textSize = this.getTextSize(ctx);
|
|
|
|
this.width = textSize.width * 1.5;
|
|
this.height = textSize.height * 2;
|
|
if (this.width < this.height) {
|
|
this.width = this.height;
|
|
}
|
|
var defaultSize = this.width;
|
|
}
|
|
};
|
|
|
|
Node.prototype._drawEllipse = function (ctx) {
|
|
this._resizeEllipse(ctx);
|
|
this.left = this.x - this.width / 2;
|
|
this.top = this.y - this.height / 2;
|
|
|
|
var borderWidth = this.options.borderWidth;
|
|
var selectionLineWidth = this.options.borderWidthSelected || 2 * this.options.borderWidth;
|
|
|
|
ctx.strokeStyle = this.selected ? this.options.color.highlight.border : this.hover ? this.options.color.hover.border : this.options.color.border;
|
|
|
|
ctx.lineWidth = (this.selected ? selectionLineWidth : borderWidth);
|
|
ctx.lineWidth *= this.networkScaleInv;
|
|
ctx.lineWidth = Math.min(this.width,ctx.lineWidth);
|
|
|
|
ctx.fillStyle = this.selected ? this.options.color.highlight.background : this.hover ? this.options.color.hover.background : this.options.color.background;
|
|
|
|
ctx.ellipse(this.left, this.top, this.width, this.height);
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
|
|
this.boundingBox.top = this.top;
|
|
this.boundingBox.left = this.left;
|
|
this.boundingBox.right = this.left + this.width;
|
|
this.boundingBox.bottom = this.top + this.height;
|
|
|
|
this._label(ctx, this.label, this.x, this.y);
|
|
};
|
|
|
|
Node.prototype._drawDot = function (ctx) {
|
|
this._drawShape(ctx, 'circle');
|
|
};
|
|
|
|
Node.prototype._drawTriangle = function (ctx) {
|
|
this._drawShape(ctx, 'triangle');
|
|
};
|
|
|
|
Node.prototype._drawTriangleDown = function (ctx) {
|
|
this._drawShape(ctx, 'triangleDown');
|
|
};
|
|
|
|
Node.prototype._drawSquare = function (ctx) {
|
|
this._drawShape(ctx, 'square');
|
|
};
|
|
|
|
Node.prototype._drawStar = function (ctx) {
|
|
this._drawShape(ctx, 'star');
|
|
};
|
|
|
|
Node.prototype._resizeShape = function (ctx) {
|
|
if (!this.width) {
|
|
this.options.radius= this.baseRadiusValue;
|
|
var size = 2 * this.options.radius;
|
|
this.width = size;
|
|
this.height = size;
|
|
}
|
|
};
|
|
|
|
Node.prototype._drawShape = function (ctx, shape) {
|
|
this._resizeShape(ctx);
|
|
|
|
this.left = this.x - this.width / 2;
|
|
this.top = this.y - this.height / 2;
|
|
|
|
var borderWidth = this.options.borderWidth;
|
|
var selectionLineWidth = this.options.borderWidthSelected || 2 * this.options.borderWidth;
|
|
var radiusMultiplier = 2;
|
|
|
|
// choose draw method depending on the shape
|
|
switch (shape) {
|
|
case 'dot': radiusMultiplier = 2; break;
|
|
case 'square': radiusMultiplier = 2; break;
|
|
case 'triangle': radiusMultiplier = 3; break;
|
|
case 'triangleDown': radiusMultiplier = 3; break;
|
|
case 'star': radiusMultiplier = 4; break;
|
|
}
|
|
|
|
ctx.strokeStyle = this.selected ? this.options.color.highlight.border : this.hover ? this.options.color.hover.border : this.options.color.border;
|
|
ctx.lineWidth = (this.selected ? selectionLineWidth : borderWidth);
|
|
ctx.lineWidth *= this.networkScaleInv;
|
|
ctx.lineWidth = Math.min(this.width,ctx.lineWidth);
|
|
|
|
ctx.fillStyle = this.selected ? this.options.color.highlight.background : this.hover ? this.options.color.hover.background : this.options.color.background;
|
|
ctx[shape](this.x, this.y, this.options.radius);
|
|
ctx.fill();
|
|
ctx.stroke();
|
|
|
|
this.boundingBox.top = this.y - this.options.radius;
|
|
this.boundingBox.left = this.x - this.options.radius;
|
|
this.boundingBox.right = this.x + this.options.radius;
|
|
this.boundingBox.bottom = this.y + this.options.radius;
|
|
|
|
if (this.label) {
|
|
this._label(ctx, this.label, this.x, this.y + this.height / 2, undefined, 'hanging',true);
|
|
this.boundingBox.left = Math.min(this.boundingBox.left, this.labelDimensions.left);
|
|
this.boundingBox.right = Math.max(this.boundingBox.right, this.labelDimensions.left + this.labelDimensions.width);
|
|
this.boundingBox.bottom = Math.max(this.boundingBox.bottom, this.boundingBox.bottom + this.labelDimensions.height);
|
|
}
|
|
};
|
|
|
|
Node.prototype._resizeText = function (ctx) {
|
|
if (!this.width) {
|
|
var margin = 5;
|
|
var textSize = this.getTextSize(ctx);
|
|
this.width = textSize.width + 2 * margin;
|
|
this.height = textSize.height + 2 * margin;
|
|
}
|
|
};
|
|
|
|
Node.prototype._drawText = function (ctx) {
|
|
this._resizeText(ctx);
|
|
this.left = this.x - this.width / 2;
|
|
this.top = this.y - this.height / 2;
|
|
|
|
this._label(ctx, this.label, this.x, this.y);
|
|
|
|
this.boundingBox.top = this.top;
|
|
this.boundingBox.left = this.left;
|
|
this.boundingBox.right = this.left + this.width;
|
|
this.boundingBox.bottom = this.top + this.height;
|
|
};
|
|
|
|
Node.prototype._resizeIcon = function (ctx) {
|
|
if (!this.width) {
|
|
var margin = 5;
|
|
var iconSize =
|
|
{
|
|
width: Number(this.options.iconSize),
|
|
height: Number(this.options.iconSize)
|
|
};
|
|
this.width = iconSize.width + 2 * margin;
|
|
this.height = iconSize.height + 2 * margin;
|
|
}
|
|
};
|
|
|
|
Node.prototype._drawIcon = function (ctx) {
|
|
this._resizeIcon(ctx);
|
|
|
|
this.options.iconSize = this.options.iconSize || 50;
|
|
|
|
this.left = this.x - this.width / 2;
|
|
this.top = this.y - this.height / 2;
|
|
this._icon(ctx);
|
|
|
|
|
|
this.boundingBox.top = this.y - this.options.iconSize/2;
|
|
this.boundingBox.left = this.x - this.options.iconSize/2;
|
|
this.boundingBox.right = this.x + this.options.iconSize/2;
|
|
this.boundingBox.bottom = this.y + this.options.iconSize/2;
|
|
|
|
if (this.label) {
|
|
var iconTextSpacing = 5;
|
|
this._label(ctx, this.label, this.x, this.y + this.height / 2 + iconTextSpacing, 'top', true);
|
|
|
|
this.boundingBox.left = Math.min(this.boundingBox.left, this.labelDimensions.left);
|
|
this.boundingBox.right = Math.max(this.boundingBox.right, this.labelDimensions.left + this.labelDimensions.width);
|
|
this.boundingBox.bottom = Math.max(this.boundingBox.bottom, this.boundingBox.bottom + this.labelDimensions.height);
|
|
}
|
|
};
|
|
|
|
Node.prototype._icon = function (ctx) {
|
|
var relativeIconSize = Number(this.options.iconSize) * this.networkScale;
|
|
|
|
if (this.options.icon && relativeIconSize > this.options.fontDrawThreshold - 1) {
|
|
|
|
var iconSize = Number(this.options.iconSize);
|
|
|
|
ctx.font = (this.selected ? "bold " : "") + iconSize + "px " + this.options.iconFontFace;
|
|
|
|
// draw icon
|
|
ctx.fillStyle = this.options.iconColor || "black";
|
|
ctx.textAlign = "center";
|
|
ctx.textBaseline = "middle";
|
|
ctx.fillText(this.options.icon, this.x, this.y);
|
|
}
|
|
};
|
|
|
|
Node.prototype._label = function (ctx, text, x, y, align, baseline, labelUnderNode) {
|
|
var relativeFontSize = Number(this.options.fontSize) * this.networkScale;
|
|
if (text && relativeFontSize >= this.options.fontDrawThreshold - 1) {
|
|
var fontSize = Number(this.options.fontSize);
|
|
|
|
// this ensures that there will not be HUGE letters on screen by setting an upper limit on the visible text size (regardless of zoomLevel)
|
|
if (relativeFontSize >= this.options.fontSizeMaxVisible) {
|
|
fontSize = Number(this.options.fontSizeMaxVisible) * this.networkScaleInv;
|
|
}
|
|
|
|
// fade in when relative scale is between threshold and threshold - 1
|
|
var fontColor = this.options.fontColor || "#000000";
|
|
var strokecolor = this.options.fontStrokeColor;
|
|
if (relativeFontSize <= this.options.fontDrawThreshold) {
|
|
var opacity = Math.max(0,Math.min(1,1 - (this.options.fontDrawThreshold - relativeFontSize)));
|
|
fontColor = util.overrideOpacity(fontColor, opacity);
|
|
strokecolor = util.overrideOpacity(strokecolor, opacity);
|
|
|
|
}
|
|
|
|
ctx.font = (this.selected ? "bold " : "") + fontSize + "px " + this.options.fontFace;
|
|
|
|
var lines = text.split('\n');
|
|
var lineCount = lines.length;
|
|
var yLine = y + (1 - lineCount) / 2 * fontSize;
|
|
if (labelUnderNode == true) {
|
|
yLine = y + (1 - lineCount) / (2 * fontSize);
|
|
}
|
|
|
|
// font fill from edges now for nodes!
|
|
var width = ctx.measureText(lines[0]).width;
|
|
for (var i = 1; i < lineCount; i++) {
|
|
var lineWidth = ctx.measureText(lines[i]).width;
|
|
width = lineWidth > width ? lineWidth : width;
|
|
}
|
|
var height = fontSize * lineCount;
|
|
var left = x - width / 2;
|
|
var top = y - height / 2;
|
|
if (baseline == "hanging") {
|
|
top += 0.5 * fontSize;
|
|
top += 4; // distance from node, required because we use hanging. Hanging has less difference between browsers
|
|
yLine += 4; // distance from node
|
|
}
|
|
this.labelDimensions = {top:top,left:left,width:width,height:height,yLine:yLine};
|
|
|
|
// create the fontfill background
|
|
if (this.options.fontFill !== undefined && this.options.fontFill !== null && this.options.fontFill !== "none") {
|
|
ctx.fillStyle = this.options.fontFill;
|
|
ctx.fillRect(left, top, width, height);
|
|
}
|
|
|
|
// draw text
|
|
ctx.fillStyle = fontColor;
|
|
ctx.textAlign = align || "center";
|
|
ctx.textBaseline = baseline || "middle";
|
|
if (this.options.fontStrokeWidth > 0){
|
|
ctx.lineWidth = this.options.fontStrokeWidth;
|
|
ctx.strokeStyle = strokecolor;
|
|
ctx.lineJoin = 'round';
|
|
}
|
|
for (var i = 0; i < lineCount; i++) {
|
|
if(this.options.fontStrokeWidth){
|
|
ctx.strokeText(lines[i], x, yLine);
|
|
}
|
|
ctx.fillText(lines[i], x, yLine);
|
|
yLine += fontSize;
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
Node.prototype.getTextSize = function(ctx) {
|
|
if (this.label !== undefined) {
|
|
var fontSize = Number(this.options.fontSize);
|
|
if (fontSize * this.networkScale > this.options.fontSizeMaxVisible) {
|
|
fontSize = Number(this.options.fontSizeMaxVisible) * this.networkScaleInv;
|
|
}
|
|
ctx.font = (this.selected ? "bold " : "") + fontSize + "px " + this.options.fontFace;
|
|
|
|
var lines = this.label.split('\n'),
|
|
height = (fontSize + 4) * lines.length,
|
|
width = 0;
|
|
|
|
for (var i = 0, iMax = lines.length; i < iMax; i++) {
|
|
width = Math.max(width, ctx.measureText(lines[i]).width);
|
|
}
|
|
|
|
return {"width": width, "height": height, lineCount: lines.length};
|
|
}
|
|
else {
|
|
return {"width": 0, "height": 0, lineCount: 0};
|
|
}
|
|
};
|
|
|
|
/**
|
|
* this is used to determine if a node is visible at all. this is used to determine when it needs to be drawn.
|
|
* there is a safety margin of 0.3 * width;
|
|
*
|
|
* @returns {boolean}
|
|
*/
|
|
Node.prototype.inArea = function() {
|
|
if (this.width !== undefined) {
|
|
return (this.x + this.width *this.networkScaleInv >= this.canvasTopLeft.x &&
|
|
this.x - this.width *this.networkScaleInv < this.canvasBottomRight.x &&
|
|
this.y + this.height*this.networkScaleInv >= this.canvasTopLeft.y &&
|
|
this.y - this.height*this.networkScaleInv < this.canvasBottomRight.y);
|
|
}
|
|
else {
|
|
return true;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* checks if the core of the node is in the display area, this is used for opening clusters around zoom
|
|
* @returns {boolean}
|
|
*/
|
|
Node.prototype.inView = function() {
|
|
return (this.x >= this.canvasTopLeft.x &&
|
|
this.x < this.canvasBottomRight.x &&
|
|
this.y >= this.canvasTopLeft.y &&
|
|
this.y < this.canvasBottomRight.y);
|
|
};
|
|
|
|
/**
|
|
* This allows the zoom level of the network to influence the rendering
|
|
* We store the inverted scale and the coordinates of the top left, and bottom right points of the canvas
|
|
*
|
|
* @param scale
|
|
* @param canvasTopLeft
|
|
* @param canvasBottomRight
|
|
*/
|
|
Node.prototype.setScaleAndPos = function(scale,canvasTopLeft,canvasBottomRight) {
|
|
this.networkScaleInv = 1.0/scale;
|
|
this.networkScale = scale;
|
|
this.canvasTopLeft = canvasTopLeft;
|
|
this.canvasBottomRight = canvasBottomRight;
|
|
};
|
|
|
|
|
|
/**
|
|
* This allows the zoom level of the network to influence the rendering
|
|
*
|
|
* @param scale
|
|
*/
|
|
Node.prototype.setScale = function(scale) {
|
|
this.networkScaleInv = 1.0/scale;
|
|
this.networkScale = scale;
|
|
};
|
|
|
|
|
|
|
|
/**
|
|
* set the velocity at 0. Is called when this node is contained in another during clustering
|
|
*/
|
|
Node.prototype.clearVelocity = function() {
|
|
this.vx = 0;
|
|
this.vy = 0;
|
|
};
|
|
|
|
|
|
/**
|
|
* Basic preservation of (kinectic) energy
|
|
*
|
|
* @param massBeforeClustering
|
|
*/
|
|
Node.prototype.updateVelocity = function(massBeforeClustering) {
|
|
var energyBefore = this.vx * this.vx * massBeforeClustering;
|
|
//this.vx = (this.vx < 0) ? -Math.sqrt(energyBefore/this.options.mass) : Math.sqrt(energyBefore/this.options.mass);
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this.vx = Math.sqrt(energyBefore/this.options.mass);
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energyBefore = this.vy * this.vy * massBeforeClustering;
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//this.vy = (this.vy < 0) ? -Math.sqrt(energyBefore/this.options.mass) : Math.sqrt(energyBefore/this.options.mass);
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this.vy = Math.sqrt(energyBefore/this.options.mass);
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};
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module.exports = Node;
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