56
Reception of Print Result
The print result can be received by setting a callback function using the onreceive property (
) of the
ePOS-Print Canvas API object. The following information is obtained:
❏
result
❏
Error
code
❏
Printer
Status
Refer to the following program. For the details about how to program a callback function in detail, refer to
.
The
printer
status
can
be
obtained
when
communication
with
the
printer
is
possible.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>TITLE</title>
<script type="text/javascript" src="epos-print-3.x.x.js"></script>
<script type="text/javascript">
function drawCanvas() {
// Rendering in HTML5 Canvas
//<Obtain the context>
var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
.
.
.
//Set the end point address
var address = 'http://192.168.192.168/cgi-bin/epos/
service.cgi?devid=local_printer&timeout=10000';
//Create an ePOS-Print Canvas API object
var epos = new epson.CanvasPrint(address);
//Set a response receipt callback function
epos.onreceive = function (res) {
//When the printing is not successful, display a message
if (!res.success) {
alert('A print error occurred');
}
}
epos.cut = true;
epos.print(canvas);
}
</script>
</head>
<body>
<button onclick="drawCanvas()">Run</button>
<canvas id="myCanvas" width="512" height="480"></canvas>
<img id="coffee" src="img/coffee.jpg" alt="">
<img id="wmark" src="img/wmark.png" alt="">
</body>
</html>
Print result receipt
callback function
Summary of Contents for TM-T88V-i
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Page 14: ...14 ePOS Print Canvas API Monochrome or Grayscale Monochrome ...
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