56 lines
1.2 KiB
JavaScript
56 lines
1.2 KiB
JavaScript
/**
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@license
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Copyright (c) 2022 trading_peter
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This program is available under Apache License Version 2.0
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*/
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import { LitElement, html, css } from 'lit';
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class TpLcLine extends LitElement {
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static get styles() {
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return [
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css`
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:host {
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display: block;
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padding: 0;
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margin: 0;
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height: 4px;
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background: blue;
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position: absolute;
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line-height: 1px;
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border-radius: 10px;
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z-index: 99;
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}
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`
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];
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}
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static get properties() {
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return {
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thickness: { type: Number },
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};
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}
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constructor() {
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super();
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this.thickness = 4;
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}
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coords(x1, y1, x2, y2) {
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// distance
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const length = Math.sqrt(((x2-x1) * (x2-x1)) + ((y2-y1) * (y2-y1)));
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// center
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const cx = ((x1 + x2) / 2) - (length / 2);
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const cy = ((y1 + y2) / 2) - (this.thickness / 2);
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// angle
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const angle = Math.atan2((y1-y2),(x1-x2))*(180/Math.PI);
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// make hr
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this.style.left = `${cx}px`
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this.style.top = `${cy}px`;
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this.style.width = `${length}px`;
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this.style.transform = `rotate(${angle}deg)`;
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}
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}
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window.customElements.define('tp-lc-line', TpLcLine);
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