Untitled

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Element Dragging on Canvas</title>
  <style>
    body {
      margin: 0;
      overflow: hidden;
    }

    canvas {
      display: block;
      background-color: #f0f0f0;
    }
  </style>
</head>
<body>
  <canvas id="canvas"></canvas>

  <script>
    const canvas = document.getElementById('canvas');
    const ctx = canvas.getContext('2d');

    // Set canvas size to fill the screen
    canvas.width = window.innerWidth;
    canvas.height = window.innerHeight;

    // Initial position of the draggable element
    let elementX = 50;
    let elementY = 50;
    const elementWidth = 100;
    const elementHeight = 50;
    let isDragging = false;

    // Function to draw the element
    function drawElement() {
      ctx.fillStyle = 'blue';
      ctx.fillRect(elementX, elementY, elementWidth, elementHeight);
    }

    // Function to check if the mouse is over the element
    function isMouseOverElement(x, y) {
      return x > elementX && x < elementX + elementWidth &&
             y > elementY && y < elementY + elementHeight;
    }

    // Mouse event listeners
    canvas.addEventListener('mousedown', (e) => {
      const mouseX = e.clientX;
      const mouseY = e.clientY;
      if (isMouseOverElement(mouseX, mouseY)) {
        isDragging = true;
      }
    });

    canvas.addEventListener('mousemove', (e) => {
      if (isDragging) {
        elementX = e.clientX - elementWidth / 2;
        elementY = e.clientY - elementHeight / 2;
        drawCanvas();
      }
    });

    canvas.addEventListener('mouseup', () => {
      isDragging = false;
    });

    // Function to redraw the canvas
    function drawCanvas() {
      ctx.clearRect(0, 0, canvas.width, canvas.height);
      drawElement();
    }

    // Initial drawing
    drawCanvas();
  </script>
</body>
</html>