Draw Oval

DrawOval Illustration

The DrawOval operation renders an oval that fits within the specified bounding box.

<div id="drawOvalContainer"> <canvas id="drawOvalCanvas_v1" width="500" height="500" style="border:1px solid #ccc; background: #fff; display: block; margin: 10px 0;"></canvas> </div> <script> (function() { function draw() { var canvas = document.getElementById('drawOvalCanvas_v1'); if (!canvas) { setTimeout(draw, 100); return; } var ctx = canvas.getContext('2d'); if (!ctx) return; var BLUE = '#0047AB', GRAY = '#888888', DARK_GRAY = '#444444', BLUE_TRANS = 'rgba(0, 71, 171, 0.2)'; ctx.clearRect(0, 0, 500, 500); var cx = 250, cy = 250, rx = 175, ry = 100; // Main Oval ctx.beginPath(); ctx.ellipse(cx, cy, rx, ry, 0, 0, 2 * Math.PI); ctx.fillStyle = BLUE_TRANS; ctx.fill(); ctx.lineWidth = 5; ctx.strokeStyle = BLUE; ctx.stroke(); // Bounding Box ctx.setLineDash([12, 12]); ctx.strokeStyle = GRAY; ctx.lineWidth = 2; ctx.strokeRect(cx - rx, cy - ry, rx * 2, ry * 2); ctx.setLineDash([]); // Labels ctx.font = 'bold 22px Arial'; ctx.fillStyle = DARK_GRAY; ctx.fillText('left, top', cx - rx, cy - ry - 15); ctx.fillText('right, bottom', cx + rx - 140, cy + ry + 40); } if (document.readyState === 'complete') { draw(); } else { window.addEventListener('load', draw); setTimeout(draw, 500); } })(); </script>