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44 lines
5.3 KiB
JavaScript
44 lines
5.3 KiB
JavaScript
import { Injectable } from '@angular/core';
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import { FlowchartConstants } from './ngx-flowchart.models';
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export class FcEdgeDrawingService {
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constructor() {
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}
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getEdgeDAttribute(pt1, pt2, style) {
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let dAddribute = `M ${pt1.x}, ${pt1.y} `;
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if (style === FlowchartConstants.curvedStyle) {
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const sourceTangent = this.computeEdgeSourceTangent(pt1, pt2);
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const destinationTangent = this.computeEdgeDestinationTangent(pt1, pt2);
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dAddribute += `C ${sourceTangent.x}, ${sourceTangent.y} ${(destinationTangent.x - 50)}, ${destinationTangent.y} ${pt2.x}, ${pt2.y}`;
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}
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else {
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dAddribute += `L ${pt2.x}, ${pt2.y}`;
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}
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return dAddribute;
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}
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getEdgeCenter(pt1, pt2) {
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return {
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x: (pt1.x + pt2.x) / 2,
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y: (pt1.y + pt2.y) / 2
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};
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}
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computeEdgeTangentOffset(pt1, pt2) {
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return (pt2.y - pt1.y) / 2;
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}
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computeEdgeSourceTangent(pt1, pt2) {
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return {
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x: pt1.x,
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y: pt1.y + this.computeEdgeTangentOffset(pt1, pt2)
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};
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}
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computeEdgeDestinationTangent(pt1, pt2) {
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return {
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x: pt2.x,
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y: pt2.y - this.computeEdgeTangentOffset(pt1, pt2)
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};
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}
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}
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FcEdgeDrawingService.decorators = [
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{ type: Injectable }
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];
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FcEdgeDrawingService.ctorParameters = () => [];
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