react-design-editor
Version:
Design Editor Tools with React.js + ant.design + fabric.js
52 lines (51 loc) • 1.99 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const fabric_1 = require("fabric");
const Link_1 = __importDefault(require("./Link"));
const CurvedLink = fabric_1.fabric.util.createClass(Link_1.default, {
type: 'curvedLink',
superType: 'link',
initialize(fromNode, fromPort, toNode, toPort, options) {
options = options || {};
this.callSuper('initialize', fromNode, fromPort, toNode, toPort, options);
},
_render(ctx) {
// Drawing curved link
const { x1, y1, x2, y2 } = this;
ctx.lineWidth = this.strokeWidth;
ctx.strokeStyle = this.stroke;
const fp = { x: (x1 - x2) / 2, y: (y1 - y2) / 2 };
const sp = { x: (x2 - x1) / 2, y: (y2 - y1) / 2 };
ctx.beginPath();
ctx.moveTo(fp.x, fp.y);
ctx.bezierCurveTo(fp.x, sp.y, sp.x, fp.y, sp.x, sp.y);
ctx.stroke();
ctx.save();
const xDiff = x2 - x1;
const yDiff = y2 - y1;
const angle = Math.atan2(yDiff, xDiff);
ctx.translate((x2 - x1) / 2, (y2 - y1) / 2);
ctx.rotate(angle >= 0 ? 1.57 : -1.57);
ctx.beginPath();
if (this.arrow) {
// Move 5px in front of line to start the arrow so it does not have the square line end showing in front (0,0)
ctx.moveTo(5, 0);
ctx.lineTo(-5, 5);
ctx.lineTo(-5, -5);
}
ctx.closePath();
ctx.fillStyle = this.stroke;
ctx.fill();
ctx.restore();
},
});
CurvedLink.fromObject = (options, callback) => {
const { fromNode, fromPort, toNode, toPort } = options;
return callback(new CurvedLink(fromNode, fromPort, toNode, toPort, options));
};
// @ts-ignore
window.fabric.CurvedLink = CurvedLink;
exports.default = CurvedLink;