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106 lines
3.4 KiB
106 lines
3.4 KiB
import EdgeBase from './util/EdgeBase'
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/**
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* A Straight Edge.
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*
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* @class StraightEdge
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* @extends EdgeBase
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*/
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class StraightEdge extends EdgeBase {
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/**
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* @param {Object} options
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* @param {Object} body
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* @param {Label} labelModule
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* @constructor StraightEdge
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*/
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constructor(options, body, labelModule) {
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super(options, body, labelModule);
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}
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/**
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* Draw a line between two nodes
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* @param {CanvasRenderingContext2D} ctx
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* @param {{toArrow: boolean, toArrowScale: (allOptions.edges.arrows.to.scaleFactor|{number}|allOptions.edges.arrows.middle.scaleFactor|allOptions.edges.arrows.from.scaleFactor|Array|number), toArrowType: *, middleArrow: boolean, middleArrowScale: (number|allOptions.edges.arrows.middle.scaleFactor|{number}|Array), middleArrowType: (allOptions.edges.arrows.middle.type|{string}|string|*), fromArrow: boolean, fromArrowScale: (allOptions.edges.arrows.to.scaleFactor|{number}|allOptions.edges.arrows.middle.scaleFactor|allOptions.edges.arrows.from.scaleFactor|Array|number), fromArrowType: *, arrowStrikethrough: (*|boolean|allOptions.edges.arrowStrikethrough|{boolean}), color: undefined, inheritsColor: (string|string|string|allOptions.edges.color.inherit|{string, boolean}|Array|*), opacity: *, hidden: *, length: *, shadow: *, shadowColor: *, shadowSize: *, shadowX: *, shadowY: *, dashes: (*|boolean|Array|allOptions.edges.dashes|{boolean, array}), width: *}} values
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* @private
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*/
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_line(ctx, values) {
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// draw a straight line
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ctx.beginPath();
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ctx.moveTo(this.fromPoint.x, this.fromPoint.y);
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ctx.lineTo(this.toPoint.x, this.toPoint.y);
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// draw shadow if enabled
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this.enableShadow(ctx, values);
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ctx.stroke();
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this.disableShadow(ctx, values);
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}
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/**
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*
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* @returns {undefined}
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* @static
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*/
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getViaNode() {
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return undefined;
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}
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/**
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* Combined function of pointOnLine and pointOnBezier. This gives the coordinates of a point on the line at a certain percentage of the way
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*
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* @param {number} percentage
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* @returns {{x: number, y: number}}
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* @private
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*/
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getPoint(percentage) {
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return {
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x: (1 - percentage) * this.fromPoint.x + percentage * this.toPoint.x,
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y: (1 - percentage) * this.fromPoint.y + percentage * this.toPoint.y
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}
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}
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/**
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*
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* @param {Node} nearNode
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* @param {CanvasRenderingContext2D} ctx
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* @returns {{x: number, y: number}}
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* @private
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*/
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_findBorderPosition(nearNode, ctx) {
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let node1 = this.to;
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let node2 = this.from;
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if (nearNode.id === this.from.id) {
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node1 = this.from;
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node2 = this.to;
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}
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let angle = Math.atan2((node1.y - node2.y), (node1.x - node2.x));
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let dx = (node1.x - node2.x);
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let dy = (node1.y - node2.y);
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let edgeSegmentLength = Math.sqrt(dx * dx + dy * dy);
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let toBorderDist = nearNode.distanceToBorder(ctx, angle);
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let toBorderPoint = (edgeSegmentLength - toBorderDist) / edgeSegmentLength;
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let borderPos = {};
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borderPos.x = (1 - toBorderPoint) * node2.x + toBorderPoint * node1.x;
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borderPos.y = (1 - toBorderPoint) * node2.y + toBorderPoint * node1.y;
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return borderPos;
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}
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/**
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*
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* @param {number} x1
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* @param {number} y1
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* @param {number} x2
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* @param {number} y2
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* @param {number} x3
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* @param {number} y3
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* @returns {number}
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* @private
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*/
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_getDistanceToEdge(x1, y1, x2, y2, x3, y3) { // x3,y3 is the point
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return this._getDistanceToLine(x1, y1, x2, y2, x3, y3);
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}
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}
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export default StraightEdge;
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