@amcharts/amcharts5/.internal/charts/hierarchy/HierarchyLink.js

amCharts 5

import { Graphics } from "../../core/render/Graphics";
import * as $array from "../../core/util/Array";
/**
 * Draws a link between nodes in a hierarchy series.
 */
export class HierarchyLink extends Graphics {
    constructor() {
        super(...arguments);
        this.bullets = [];
    }
    _handleBullets(bullets) {
        $array.each(this.bullets, (bullet) => {
            bullet.dispose();
        });
        bullets.each((bullet) => {
            const newBullet = bullet(this._root, this.get("source"), this.get("target"));
            if (newBullet) {
                this.bullets.push(newBullet);
                const sprite = newBullet.get("sprite");
                this.addDisposer(newBullet.on("locationX", () => {
                    this._clear = true;
                    this.markDirty();
                }));
                if (sprite) {
                    const series = this.series;
                    if (series) {
                        series.linksContainer.children.push(sprite);
                    }
                }
            }
        });
    }
    _changed() {
        var _a, _b;
        super._changed();
        if (this._clear) {
            let source = this.get("source");
            let target = this.get("target");
            if (source && target) {
                const sourceNode = source.get("node");
                const targetNode = target.get("node");
                const x0 = sourceNode.x();
                const y0 = sourceNode.y();
                const x1 = targetNode.x();
                const y1 = targetNode.y();
                this._display.moveTo(x0, y0);
                this._display.lineTo(x1, y1);
                const sourceRadius = (_a = sourceNode.dataItem) === null || _a === void 0 ? void 0 : _a.get("outerCircle").get("radius", 0);
                const targetRadius = (_b = targetNode.dataItem) === null || _b === void 0 ? void 0 : _b.get("outerCircle").get("radius", 0);
                const distance = Math.hypot(x1 - x0, y1 - y0);
                const trueDistance = distance - sourceRadius - targetRadius;
                $array.each(this.bullets, (bullet) => {
                    const sprite = bullet.get("sprite");
                    if (sprite) {
                        const location = bullet.get("locationX", 0.5);
                        // const tx = trueDistance / distance * (x1 - x0);
                        // const ty = trueDistance / distance * (y1 - y0);
                        sprite.set("x", x0 + sourceRadius / distance * (x1 - x0) + trueDistance / distance * (x1 - x0) * location);
                        sprite.set("y", y0 + sourceRadius / distance * (y1 - y0) + trueDistance / distance * (y1 - y0) * location);
                        if (bullet.get("autoRotate")) {
                            sprite.set("rotation", Math.atan2(y1 - y0, x1 - x0) * 180 / Math.PI + bullet.get("autoRotateAngle", 0));
                        }
                    }
                });
            }
        }
    }
    hide(duration) {
        $array.each(this.bullets, (bullet) => {
            if (bullet) {
                const sprite = bullet.get("sprite");
                if (sprite) {
                    sprite.hide(duration);
                }
            }
        });
        return super.hide();
    }
    show(duration) {
        $array.each(this.bullets, (bullet) => {
            if (bullet) {
                const sprite = bullet.get("sprite");
                if (sprite) {
                    sprite.show(duration);
                }
            }
        });
        return super.show();
    }
    _beforeChanged() {
        super._beforeChanged();
        if (this.isDirty("source")) {
            if (this._sourceDp) {
                this._sourceDp.dispose();
            }
            const source = this.get("source");
            if (source) {
                const sourceNode = source.get("node");
                this._sourceDp = sourceNode.events.on("positionchanged", () => {
                    this._markDirtyKey("stroke");
                });
                this._disposers.push(this._sourceDp);
            }
        }
        if (this.isDirty("target")) {
            if (this._targetDp) {
                this._targetDp.dispose();
            }
            const target = this.get("target");
            if (target) {
                const targetNode = target.get("node");
                this._targetDp = targetNode.events.on("positionchanged", () => {
                    this._markDirtyKey("stroke");
                });
                this._disposers.push(this._targetDp);
            }
        }
    }
    _dispose() {
        super._dispose();
        $array.each(this.bullets, (bullet) => {
            bullet.dispose();
        });
        this.bullets = [];
    }
}
HierarchyLink.className = "HierarchyLink";
HierarchyLink.classNames = Graphics.classNames.concat([HierarchyLink.className]);
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