Canvas Mouse Coordinate, How can we get mouse coordinate from canvas, Here is javascript code have event listener when mouse move and you can receive mouse coordinates.
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<!DOCTYPE HTML> <html> <head> <style> body { margin: 0px; padding: 0px; } </style> </head> <body> <canvas id="myCanvas" width="578" height="200" style="border:1px solid blue;"></canvas> <script> function writeMessage(canvas, message) { var context = canvas.getContext('2d'); context.clearRect(0, 0, canvas.width, canvas.height); context.font = '13pt Calibri'; context.fillStyle = 'blue'; context.fillText(message, 10, 25); } function getMousePos(canvas, evt) { var rect = canvas.getBoundingClientRect(); return { x: evt.clientX - rect.left, y: evt.clientY - rect.top }; } var canvas = document.getElementById('myCanvas'); var context = canvas.getContext('2d'); canvas.addEventListener('mousemove', function(evt) { var mousePos = getMousePos(canvas, evt); var message = 'Mouse Position: ' + mousePos.x + ',' + mousePos.y; writeMessage(canvas, message); }, false); </script> </body> </html> |
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