JSFiddle - React, Tailwind, and code Playground

by RavilG

HTML

<!DOCTYPE html>
<html lang="de">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Phasor Diagramm</title>
    <link rel="stylesheet" href="styles.css">
</head>
<body>
    <h1>Phasor Diagramm</h1>
    <div id="legend">Winkel: 0°, Magnitude: 0</div>
    <canvas id="phasorCanvas" width="600" height="600"></canvas>
    <div id="phasorMenu" style="display: none;">
        <button id="deletePhasor">Löschen</button>
        <!-- Weitere Buttons können hier hinzugefügt werden -->
    </div>
    <div>
        <label for="selectedPhasor">Ausgewählter Phasor:</label>
        <select id="selectedPhasor"></select>
        <label for="newMagnitude">Neue Magnitude:</label>
        <input type="number" id="newMagnitude" step="0.1">
        <label for="newAngle">Neuer Winkel (Grad):</label>
        <input type="number" id="newAngle" step="1">
        <button id="updatePhasor">Phasor aktualisieren</button>
    </div>
    <script src="script.js"></script>
</body>
</html>

CSS

body {
    font-family: Arial, sans-serif;
    text-align: center;
}

canvas {
    border: 1px solid black;
    margin-top: 20px;
}

#legend {
    margin-top: 10px;
    font-size: 18px;
}

div {
    margin-top: 20px;
}

label, select, input, button {
    margin: 5px;
}

#phasorMenu {
    position: absolute;
    background-color: white;
    border: 1px solid black;
    padding: 10px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.1);
}

JavaScript

const canvas = document.getElementById('phasorCanvas');
const ctx = canvas.getContext('2d');
const legend = document.getElementById('legend');
const selectedPhasorSelect = document.getElementById('selectedPhasor');
const newMagnitudeInput = document.getElementById('newMagnitude');
const newAngleInput = document.getElementById('newAngle');
const updatePhasorButton = document.getElementById('updatePhasor');
const phasorMenu = document.getElementById('phasorMenu');
const deletePhasorButton = document.getElementById('deletePhasor');
let phasors = [];
let isDrawing = false;
let isDragging = false;
let isResizing = false;
let currentPhasor = null;
let selectedPhasor = null;
let resizeEnd = null;

canvas.addEventListener('mousedown', startDrawingOrDragging);
canvas.addEventListener('mousemove', drawOrDrag);
canvas.addEventListener('mouseup', stopDrawingOrDragging);
canvas.addEventListener('mousemove', handleHover);
canvas.addEventListener('click', handleClick);
updatePhasorButton.addEventListener('click', updateSelectedPhasor);
deletePhasorButton.addEventListener('click', deleteSelectedPhasor);
document.addEventListener('click', handleDocumentClick);

function startDrawingOrDragging(event) {
    const { offsetX, offsetY } = event;
    const clickedPhasor = getClickedPhasor(offsetX, offsetY);
    if (clickedPhasor) {
        const clickedEnd = getClickedEnd(clickedPhasor, offsetX, offsetY);
        if (clickedEnd) {
            isResizing = true;
            selectedPhasor = clickedPhasor;
            resizeEnd = clickedEnd;
        } else {
            isDragging = true;
            selectedPhasor = clickedPhasor;
        }
        updateSelectedPhasorSelect();
    } else {
        isDrawing = true;
        currentPhasor = { startX: offsetX, startY: offsetY, endX: offsetX, endY: offsetY };
        phasors.push(currentPhasor);
        updateSelectedPhasorSelect();
    }
}

function drawOrDrag(event) {
    const { offsetX, offsetY } = event;
    if (isDrawing) {
       ...