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653 lines
22 KiB
653 lines
22 KiB
var util = require('../../../util');
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var Label = require('./shared/Label').default;
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var CubicBezierEdge = require('./edges/CubicBezierEdge').default;
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var BezierEdgeDynamic = require('./edges/BezierEdgeDynamic').default;
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var BezierEdgeStatic = require('./edges/BezierEdgeStatic').default;
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var StraightEdge = require('./edges/StraightEdge').default;
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/**
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* @class Edge
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*
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* A edge connects two nodes
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* @param {Object} properties Object with options. Must contain
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* At least options from and to.
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* Available options: from (number),
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* to (number), label (string, color (string),
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* width (number), style (string),
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* length (number), title (string)
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* @param {Network} network A Network object, used to find and edge to
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* nodes.
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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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class Edge {
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constructor(options, body, globalOptions, defaultOptions, edgeOptions) {
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if (body === undefined) {
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throw "No body provided";
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}
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this.options = util.bridgeObject(globalOptions);
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this.globalOptions = globalOptions;
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this.defaultOptions = defaultOptions;
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this.edgeOptions = edgeOptions;
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this.body = body;
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// initialize variables
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this.id = undefined;
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this.fromId = undefined;
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this.toId = undefined;
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this.selected = false;
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this.hover = false;
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this.labelDirty = true;
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this.baseWidth = this.options.width;
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this.baseFontSize = this.options.font.size;
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this.from = undefined; // a node
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this.to = undefined; // a node
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this.edgeType = undefined;
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this.connected = false;
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this.labelModule = new Label(this.body, this.options, true /* It's an edge label */);
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this.setOptions(options);
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}
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/**
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* Set or overwrite options for the edge
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* @param {Object} options an object with options
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* @param doNotEmit
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*/
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setOptions(options) {
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if (!options) {
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return;
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}
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Edge.parseOptions(this.options, options, true, this.globalOptions);
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if (options.id !== undefined) {
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this.id = options.id;
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}
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if (options.from !== undefined) {
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this.fromId = options.from;
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}
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if (options.to !== undefined) {
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this.toId = options.to;
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}
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if (options.title !== undefined) {
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this.title = options.title;
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}
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if (options.value !== undefined) {
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options.value = parseFloat(options.value);
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}
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this.choosify(options);
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// update label Module
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this.updateLabelModule(options);
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this.labelModule.propagateFonts(this.edgeOptions, options, this.defaultOptions);
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let dataChanged = this.updateEdgeType();
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// if anything has been updates, reset the selection width and the hover width
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this._setInteractionWidths();
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// A node is connected when it has a from and to node that both exist in the network.body.nodes.
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this.connect();
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if (options.hidden !== undefined || options.physics !== undefined) {
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dataChanged = true;
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}
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return dataChanged;
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}
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static parseOptions(parentOptions, newOptions, allowDeletion = false, globalOptions = {}) {
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var fields = [
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'arrowStrikethrough',
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'id',
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'from',
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'hidden',
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'hoverWidth',
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'label',
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'labelHighlightBold',
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'length',
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'line',
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'opacity',
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'physics',
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'scaling',
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'selectionWidth',
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'selfReferenceSize',
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'to',
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'title',
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'value',
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'width'
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];
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// only deep extend the items in the field array. These do not have shorthand.
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util.selectiveDeepExtend(fields, parentOptions, newOptions, allowDeletion);
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util.mergeOptions(parentOptions, newOptions, 'smooth', globalOptions);
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util.mergeOptions(parentOptions, newOptions, 'shadow', globalOptions);
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if (newOptions.dashes !== undefined && newOptions.dashes !== null) {
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parentOptions.dashes = newOptions.dashes;
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}
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else if (allowDeletion === true && newOptions.dashes === null) {
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parentOptions.dashes = Object.create(globalOptions.dashes); // this sets the pointer of the option back to the global option.
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}
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// set the scaling newOptions
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if (newOptions.scaling !== undefined && newOptions.scaling !== null) {
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if (newOptions.scaling.min !== undefined) {parentOptions.scaling.min = newOptions.scaling.min;}
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if (newOptions.scaling.max !== undefined) {parentOptions.scaling.max = newOptions.scaling.max;}
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util.mergeOptions(parentOptions.scaling, newOptions.scaling, 'label', globalOptions.scaling);
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}
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else if (allowDeletion === true && newOptions.scaling === null) {
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parentOptions.scaling = Object.create(globalOptions.scaling); // this sets the pointer of the option back to the global option.
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}
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// handle multiple input cases for arrows
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if (newOptions.arrows !== undefined && newOptions.arrows !== null) {
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if (typeof newOptions.arrows === 'string') {
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let arrows = newOptions.arrows.toLowerCase();
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parentOptions.arrows.to.enabled = arrows.indexOf("to") != -1;
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parentOptions.arrows.middle.enabled = arrows.indexOf("middle") != -1;
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parentOptions.arrows.from.enabled = arrows.indexOf("from") != -1;
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}
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else if (typeof newOptions.arrows === 'object') {
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util.mergeOptions(parentOptions.arrows, newOptions.arrows, 'to', globalOptions.arrows);
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util.mergeOptions(parentOptions.arrows, newOptions.arrows, 'middle', globalOptions.arrows);
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util.mergeOptions(parentOptions.arrows, newOptions.arrows, 'from', globalOptions.arrows);
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}
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else {
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throw new Error("The arrow newOptions can only be an object or a string. Refer to the documentation. You used:" + JSON.stringify(newOptions.arrows));
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}
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}
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else if (allowDeletion === true && newOptions.arrows === null) {
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parentOptions.arrows = Object.create(globalOptions.arrows); // this sets the pointer of the option back to the global option.
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}
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// handle multiple input cases for color
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if (newOptions.color !== undefined && newOptions.color !== null) {
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// make a copy of the parent object in case this is referring to the global one (due to object create once, then update)
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parentOptions.color = util.deepExtend({}, parentOptions.color, true);
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if (util.isString(newOptions.color)) {
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parentOptions.color.color = newOptions.color;
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parentOptions.color.highlight = newOptions.color;
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parentOptions.color.hover = newOptions.color;
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parentOptions.color.inherit = false;
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}
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else {
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let colorsDefined = false;
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if (newOptions.color.color !== undefined) {parentOptions.color.color = newOptions.color.color; colorsDefined = true;}
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if (newOptions.color.highlight !== undefined) {parentOptions.color.highlight = newOptions.color.highlight; colorsDefined = true;}
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if (newOptions.color.hover !== undefined) {parentOptions.color.hover = newOptions.color.hover; colorsDefined = true;}
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if (newOptions.color.inherit !== undefined) {parentOptions.color.inherit = newOptions.color.inherit;}
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if (newOptions.color.opacity !== undefined) {parentOptions.color.opacity = Math.min(1,Math.max(0,newOptions.color.opacity));}
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if (newOptions.color.inherit === undefined && colorsDefined === true) {
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parentOptions.color.inherit = false;
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}
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}
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}
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else if (allowDeletion === true && newOptions.color === null) {
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parentOptions.color = util.bridgeObject(globalOptions.color); // set the object back to the global options
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}
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// handle the font settings
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if (newOptions.font !== undefined && newOptions.font !== null) {
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Label.parseOptions(parentOptions.font, newOptions);
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}
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else if (allowDeletion === true && newOptions.font === null) {
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parentOptions.font = util.bridgeObject(globalOptions.font); // set the object back to the global options
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}
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}
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choosify(options) {
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this.chooser = true;
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let pile = [options, this.options, this.edgeOptions, this.defaultOptions];
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let chosen = util.topMost(pile, 'chosen');
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if (typeof chosen === 'boolean') {
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this.chooser = chosen;
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} else if (typeof chosen === 'object') {
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let chosenEdge = util.topMost(pile, ['chosen', 'edge']);
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if ((typeof chosenEdge === 'boolean') || (typeof chosenEdge === 'function')) {
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this.chooser = chosenEdge;
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}
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}
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}
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getFormattingValues() {
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let toArrow = (this.options.arrows.to === true) || (this.options.arrows.to.enabled === true)
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let fromArrow = (this.options.arrows.from === true) || (this.options.arrows.from.enabled === true)
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let middleArrow = (this.options.arrows.middle === true) || (this.options.arrows.middle.enabled === true)
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let inheritsColor = this.options.color.inherit;
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let values = {
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toArrow: toArrow,
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toArrowScale: this.options.arrows.to.scaleFactor,
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toArrowType: this.options.arrows.to.type,
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middleArrow: middleArrow,
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middleArrowScale: this.options.arrows.middle.scaleFactor,
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middleArrowType: this.options.arrows.middle.type,
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fromArrow: fromArrow,
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fromArrowScale: this.options.arrows.from.scaleFactor,
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fromArrowType: this.options.arrows.from.type,
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arrowStrikethrough: this.options.arrowStrikethrough,
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color: (inheritsColor? undefined : this.options.color.color),
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inheritsColor: inheritsColor,
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opacity: this.options.color.opacity,
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hidden: this.options.hidden,
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length: this.options.length,
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shadow: this.options.shadow.enabled,
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shadowColor: this.options.shadow.color,
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shadowSize: this.options.shadow.size,
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shadowX: this.options.shadow.x,
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shadowY: this.options.shadow.y,
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dashes: this.options.dashes,
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width: this.options.width
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};
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if (this.selected || this.hover) {
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if (this.chooser === true) {
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if (this.selected) {
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let selectedWidth = this.options.selectionWidth;
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if (typeof selectedWidth === 'function') {
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values.width = selectedWidth(values.width);
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} else if (typeof selectedWidth === 'number') {
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values.width += selectedWidth;
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}
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values.width = Math.max(values.width, 0.3 / this.body.view.scale);
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values.color = this.options.color.highlight;
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values.shadow = this.options.shadow.enabled;
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} else if (this.hover) {
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let hoverWidth = this.options.hoverWidth;
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if (typeof hoverWidth === 'function') {
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values.width = hoverWidth(values.width);
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} else if (typeof hoverWidth === 'number') {
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values.width += hoverWidth;
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}
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values.width = Math.max(values.width, 0.3 / this.body.view.scale);
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values.color = this.options.color.hover;
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values.shadow = this.options.shadow.enabled;
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}
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} else if (typeof this.chooser === 'function') {
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this.chooser(values, this.options.id, this.selected, this.hover);
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if (values.color !== undefined) {
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values.inheritsColor = false;
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}
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if (values.shadow === false) {
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if ((values.shadowColor !== this.options.shadow.color) ||
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(values.shadowSize !== this.options.shadow.size) ||
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(values.shadowX !== this.options.shadow.x) ||
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(values.shadowY !== this.options.shadow.y)) {
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values.shadow = true;
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}
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}
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}
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} else {
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values.shadow = this.options.shadow.enabled;
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values.width = Math.max(values.width, 0.3 / this.body.view.scale);
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}
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return values;
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}
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/**
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* update the options in the label module
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*/
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updateLabelModule(options) {
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this.labelModule.setOptions(this.options, true);
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if (this.labelModule.baseSize !== undefined) {
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this.baseFontSize = this.labelModule.baseSize;
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}
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this.labelModule.constrain(this.edgeOptions, options, this.defaultOptions);
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this.labelModule.choosify(this.edgeOptions, options, this.defaultOptions);
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}
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/**
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* update the edge type, set the options
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* @returns {boolean}
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*/
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updateEdgeType() {
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let smooth = this.options.smooth;
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let dataChanged = false;
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let changeInType = true;
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if (this.edgeType !== undefined) {
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if ((((this.edgeType instanceof BezierEdgeDynamic) &&
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(smooth.enabled === true) &&
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(smooth.type === 'dynamic'))) ||
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(((this.edgeType instanceof CubicBezierEdge) &&
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(smooth.enabled === true) &&
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(smooth.type === 'cubicBezier'))) ||
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(((this.edgeType instanceof BezierEdgeStatic) &&
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(smooth.enabled === true) &&
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(smooth.type !== 'dynamic') &&
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(smooth.type !== 'cubicBezier'))) ||
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(((this.edgeType instanceof StraightEdge) &&
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(smooth.type.enabled === false)))) {
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changeInType = false;
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}
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if (changeInType === true) {
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dataChanged = this.cleanup();
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}
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}
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if (changeInType === true) {
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if (smooth.enabled === true) {
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if (smooth.type === 'dynamic') {
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dataChanged = true;
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this.edgeType = new BezierEdgeDynamic(this.options, this.body, this.labelModule);
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} else if (smooth.type === 'cubicBezier') {
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this.edgeType = new CubicBezierEdge(this.options, this.body, this.labelModule);
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} else {
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this.edgeType = new BezierEdgeStatic(this.options, this.body, this.labelModule);
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}
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} else {
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this.edgeType = new StraightEdge(this.options, this.body, this.labelModule);
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}
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} else { // if nothing changes, we just set the options.
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this.edgeType.setOptions(this.options);
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}
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return dataChanged;
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}
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/**
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* Connect an edge to its nodes
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*/
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connect() {
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this.disconnect();
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this.from = this.body.nodes[this.fromId] || undefined;
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this.to = this.body.nodes[this.toId] || undefined;
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this.connected = (this.from !== undefined && this.to !== undefined);
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if (this.connected === true) {
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this.from.attachEdge(this);
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this.to.attachEdge(this);
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}
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else {
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if (this.from) {
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this.from.detachEdge(this);
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}
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if (this.to) {
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this.to.detachEdge(this);
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}
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}
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this.edgeType.connect();
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}
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/**
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* Disconnect an edge from its nodes
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*/
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disconnect() {
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if (this.from) {
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this.from.detachEdge(this);
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this.from = undefined;
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}
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if (this.to) {
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this.to.detachEdge(this);
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this.to = undefined;
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}
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this.connected = false;
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}
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/**
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* get the title of this edge.
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* @return {string} title The title of the edge, or undefined when no title
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* has been set.
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*/
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getTitle() {
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return this.title;
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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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isSelected() {
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return this.selected;
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}
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/**
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* Retrieve the value of the edge. Can be undefined
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* @return {Number} value
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*/
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getValue() {
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return this.options.value;
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}
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/**
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* Adjust the value range of the edge. The edge will adjust it's width
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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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* @param total
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*/
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setValueRange(min, max, total) {
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if (this.options.value !== undefined) {
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var scale = this.options.scaling.customScalingFunction(min, max, total, this.options.value);
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var widthDiff = this.options.scaling.max - this.options.scaling.min;
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if (this.options.scaling.label.enabled === true) {
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var fontDiff = this.options.scaling.label.max - this.options.scaling.label.min;
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this.options.font.size = this.options.scaling.label.min + scale * fontDiff;
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}
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this.options.width = this.options.scaling.min + scale * widthDiff;
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}
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else {
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this.options.width = this.baseWidth;
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this.options.font.size = this.baseFontSize;
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}
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this._setInteractionWidths();
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this.updateLabelModule();
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}
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_setInteractionWidths() {
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if (typeof this.options.hoverWidth === 'function') {
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this.edgeType.hoverWidth = this.options.hoverWidth(this.options.width);
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} else {
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this.edgeType.hoverWidth = this.options.hoverWidth + this.options.width;
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}
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if (typeof this.options.selectionWidth === 'function') {
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this.edgeType.selectionWidth = this.options.selectionWidth(this.options.width);
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} else {
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this.edgeType.selectionWidth = this.options.selectionWidth + this.options.width;
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}
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}
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/**
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* Redraw a edge
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* Draw this edge 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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draw(ctx) {
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let values = this.getFormattingValues();
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if (values.hidden) {
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return;
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}
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// get the via node from the edge type
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let viaNode = this.edgeType.getViaNode();
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let arrowData = {};
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// restore edge targets to defaults
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this.edgeType.fromPoint = this.edgeType.from;
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this.edgeType.toPoint = this.edgeType.to;
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// from and to arrows give a different end point for edges. we set them here
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if (values.fromArrow) {
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arrowData.from = this.edgeType.getArrowData(ctx, 'from', viaNode, this.selected, this.hover, values);
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if (values.arrowStrikethrough === false)
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this.edgeType.fromPoint = arrowData.from.core;
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}
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if (values.toArrow) {
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arrowData.to = this.edgeType.getArrowData(ctx, 'to', viaNode, this.selected, this.hover, values);
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if (values.arrowStrikethrough === false)
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this.edgeType.toPoint = arrowData.to.core;
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}
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// the middle arrow depends on the line, which can depend on the to and from arrows so we do this one lastly.
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if (values.middleArrow) {
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arrowData.middle = this.edgeType.getArrowData(ctx,'middle', viaNode, this.selected, this.hover, values);
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}
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// draw everything
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this.edgeType.drawLine(ctx, values, this.selected, this.hover, viaNode);
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this.drawArrows(ctx, arrowData, values);
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this.drawLabel (ctx, viaNode);
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}
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drawArrows(ctx, arrowData, values) {
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if (values.fromArrow) {
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this.edgeType.drawArrowHead(ctx, values, this.selected, this.hover, arrowData.from);
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}
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if (values.middleArrow) {
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this.edgeType.drawArrowHead(ctx, values, this.selected, this.hover, arrowData.middle);
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}
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if (values.toArrow) {
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this.edgeType.drawArrowHead(ctx, values, this.selected, this.hover, arrowData.to);
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}
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}
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drawLabel(ctx, viaNode) {
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if (this.options.label !== undefined) {
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// set style
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var node1 = this.from;
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var node2 = this.to;
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if (this.labelModule.differentState(this.selected, this.hover)) {
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this.labelModule.getTextSize(ctx, this.selected, this.hover);
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}
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|
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if (node1.id != node2.id) {
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this.labelModule.pointToSelf = false;
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var point = this.edgeType.getPoint(0.5, viaNode);
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ctx.save();
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|
|
|
// if the label has to be rotated:
|
|
if (this.options.font.align !== "horizontal") {
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|
this.labelModule.calculateLabelSize(ctx, this.selected, this.hover, point.x, point.y);
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|
ctx.translate(point.x, this.labelModule.size.yLine);
|
|
this._rotateForLabelAlignment(ctx);
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|
}
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|
|
|
// draw the label
|
|
this.labelModule.draw(ctx, point.x, point.y, this.selected, this.hover);
|
|
ctx.restore();
|
|
}
|
|
else {
|
|
// Ignore the orientations.
|
|
this.labelModule.pointToSelf = true;
|
|
var x, y;
|
|
var radius = this.options.selfReferenceSize;
|
|
if (node1.shape.width > node1.shape.height) {
|
|
x = node1.x + node1.shape.width * 0.5;
|
|
y = node1.y - radius;
|
|
}
|
|
else {
|
|
x = node1.x + radius;
|
|
y = node1.y - node1.shape.height * 0.5;
|
|
}
|
|
point = this._pointOnCircle(x, y, radius, 0.125);
|
|
this.labelModule.draw(ctx, point.x, point.y, this.selected, this.hover);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Check if this object is overlapping with the provided object
|
|
* @param {Object} obj an object with parameters left, top
|
|
* @return {boolean} True if location is located on the edge
|
|
*/
|
|
isOverlappingWith(obj) {
|
|
if (this.connected) {
|
|
var distMax = 10;
|
|
var xFrom = this.from.x;
|
|
var yFrom = this.from.y;
|
|
var xTo = this.to.x;
|
|
var yTo = this.to.y;
|
|
var xObj = obj.left;
|
|
var yObj = obj.top;
|
|
|
|
var dist = this.edgeType.getDistanceToEdge(xFrom, yFrom, xTo, yTo, xObj, yObj);
|
|
|
|
return (dist < distMax);
|
|
}
|
|
else {
|
|
return false
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Rotates the canvas so the text is most readable
|
|
* @param {CanvasRenderingContext2D} ctx
|
|
* @private
|
|
*/
|
|
_rotateForLabelAlignment(ctx) {
|
|
var dy = this.from.y - this.to.y;
|
|
var dx = this.from.x - this.to.x;
|
|
var angleInDegrees = Math.atan2(dy, dx);
|
|
|
|
// rotate so label it is readable
|
|
if ((angleInDegrees < -1 && dx < 0) || (angleInDegrees > 0 && dx < 0)) {
|
|
angleInDegrees = angleInDegrees + Math.PI;
|
|
}
|
|
|
|
ctx.rotate(angleInDegrees);
|
|
}
|
|
|
|
|
|
/**
|
|
* Get a point on a circle
|
|
* @param {Number} x
|
|
* @param {Number} y
|
|
* @param {Number} radius
|
|
* @param {Number} percentage. Value between 0 (line start) and 1 (line end)
|
|
* @return {Object} point
|
|
* @private
|
|
*/
|
|
_pointOnCircle(x, y, radius, percentage) {
|
|
var angle = percentage * 2 * Math.PI;
|
|
return {
|
|
x: x + radius * Math.cos(angle),
|
|
y: y - radius * Math.sin(angle)
|
|
}
|
|
}
|
|
|
|
|
|
select() {
|
|
this.selected = true;
|
|
}
|
|
|
|
|
|
unselect() {
|
|
this.selected = false;
|
|
}
|
|
|
|
|
|
/**
|
|
* cleans all required things on delete
|
|
* @returns {*}
|
|
*/
|
|
cleanup() {
|
|
return this.edgeType.cleanup();
|
|
}
|
|
}
|
|
|
|
export default Edge;
|