troubleshooting Question
Need help in Posting pasted image to PHP via Javascript
asked on
I'm a total Javascript-illiterate, but I need your help in modifying the following code so that it can
I'd much appreciate it if you could help....
- allow users to paste their clipboard image (via Chrome), and
- upload the image along with other user input to my PHP script via POST.
I'd much appreciate it if you could help....
<!DOCTYPE html>
<html>
<head>
<title>Paste-able Canvas</title>
<script type="text/javascript">
function enablePasteForCanvas(canvas) {
var pasteEvent = function(e) {
(function() {
var i;
// Search image data in the clipboard
var items = e.clipboardData.items;
var imageItem = null;
for(i = 0; i < items.length; i++) {
if(items[i].type.indexOf("image/") != -1) {
imageItem = items[i];
break;
}
}
if(! imageItem) {
console.log("clipboard does not contain an image.");
return;
}
//convert: clipboardData.items -> Blob -> Image
var blob = imageItem.getAsFile();
var blobUrl = window.URL.createObjectURL(blob);
var img = new Image();
img.onload = function() {
//Draw the image on canvas
var context = canvas.getContext("2d");
context.drawImage(img, 0, 0);
};
img.src = blobUrl;
}());
e.preventDefault();
};
canvas.addEventListener("focus", function(e){
document.addEventListener("paste", pasteEvent, false);
}, false);
canvas.addEventListener("blur", function(e){
document.removeEventListener("paste", pasteEvent, false);
}, false);
}
window.addEventListener("load",function(e){
enablePasteForCanvas(document.getElementById("my_canvas"));
}, false);
</script>
</head>
<body>
<h2>Paste an image below</h2>(use Cntl + V)
<br><br>Browswer: Chrome only.<br>
<table border=1 width=640><tr><td>
<canvas id="my_canvas" width="640" height="280" tabindex="2"></canvas>
</table>
<br><br>
<form type=POST action=drag.php>
Text: <input type=textbox name=text_1 width=10><br><br>
Color: <input type=radio name=radio_1 value=blue> Blue
<input type=radio name=radio_1 value=red> Red <br><br><br>
<input type=submit name=submit value=submit>
</form>
</body>
</html>
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