noytzach.github.io/grid_2.html at master · noytzach/noytzach.github.io · GitHub

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<!DOCTYPE html>
<html>
<head>
<title>Interactive Grid</title>
<style>
body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

#main-container {
    display: flex;
    position: relative;       /* Make main-container relatively positioned */
}

#legend {
    display: flex;
    flex-direction: column;
    width: 20px;
    margin-right: 20px;
}

.legend-cell {
    height: 1px;
}

#grid-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#grid {
    display: grid;
    grid-template-columns: repeat(var(--grid-size), 10px);
    grid-template-rows: repeat(var(--grid-size), 10px);
    border: 1px solid black;
    width: calc(var(--grid-size) * 10px);
    height: calc(var(--grid-size) * 10px);
    justify-content: center;
    align-content: center;
}

.cell {
    width: 10px;
    height: 10px;
}

#warning {
    color: red;
    visibility: hidden;
    margin-bottom: 5px;
}

#slider-container { /* New styles for slider container */
    position: absolute;
    top: 10px;
    left: 10px;
}

#slider {
    width: 200px;
}
</style>
</head>
<body>

<div id="slider-container">
    <input type="range" id="slider" min="0" max="100" value="0" oninput="updateGrid()">
    <span id="slider-value">t = 0.00</span>
</div>

<div id="main-container">
    <div id="legend"></div>
    <div id="grid-container">
        <div id="warning">⚠️ Invalid expression</div>
        <input type="text" id="expression" placeholder="Enter expression (x, y, t)" onkeyup="handleInput()">
        <div id="grid"></div>
    </div>
</div>

<script>
const GRID_SIZE = 63;

document.documentElement.style.setProperty('--grid-size', GRID_SIZE);

let lastValidColors = {};
let warningTimeout;
let t = 0;

function updateGrid() {
    const expression = document.getElementById("expression").value;
    const slider = document.getElementById("slider");
    const sliderValue = document.getElementById("slider-value");
    t = slider.value / 100;
    sliderValue.textContent = `t = ${t.toFixed(2)}`;

    const grid = document.getElementById("grid");
    const warning = document.getElementById("warning");
    grid.innerHTML = '';
    let allFailed = true;

    for (let y = -Math.floor(GRID_SIZE / 2); y <= Math.floor(GRID_SIZE / 2); y++) {
        for (let x = -Math.floor(GRID_SIZE / 2); x <= Math.floor(GRID_SIZE / 2); x++) {
            const cell = document.createElement("div");
            cell.classList.add("cell");

            try {
                const result = eval(expression); // Evaluate the expression from the textbox
                const hue = (result % 256);
                const color = `hsl(${hue}, 100%, 50%)`;
                cell.style.backgroundColor = color;
                lastValidColors[`${x},${y}`] = color;
                allFailed = false;
            } catch (error) {
                cell.style.backgroundColor = lastValidColors[`${x},${y}`] || "gray";
            }

            grid.appendChild(cell);
        }
    }

    if (allFailed) {
        warningTimeout = setTimeout(() => {
            warning.style.visibility = "visible";
        }, 3000);
    } else {
        clearTimeout(warningTimeout);
        warning.style.visibility = "hidden";
    }
}

function handleInput() {
    updateGrid();
    clearTimeout(warningTimeout);
    warning.style.visibility = "hidden";

    const expression = document.getElementById("expression").value;
    let allFailed = true;

    // Check if the expression is still invalid
    for (let y = -Math.floor(GRID_SIZE / 2); y <= Math.floor(GRID_SIZE / 2); y++) {
        for (let x = -Math.floor(GRID_SIZE / 2); x <= Math.floor(GRID_SIZE / 2); x++) {
            try {
                eval(expression);
                allFailed = false;
                break; // No need to check further if one is valid
            } catch (error) {
                // Continue checking for errors in other cells
            }
        }
    }

    if (allFailed) {
        warningTimeout = setTimeout(() => {
            warning.style.visibility = "visible";
        }, 3000);
    }
}

// Create the legend
const legend = document.getElementById("legend");
for (let hue = 0; hue < 256; hue++) {
    const cell = document.createElement("div");
    cell.classList.add("legend-cell");
    cell.style.backgroundColor = `hsl(${hue}, 100%, 50%)`;
    legend.appendChild(cell);
}

// Initial grid update
updateGrid();
</script>

</body>
</html>