I'm exploring HTML5 and Processing.js.
When the user clicks on an image on my webpage, I'd like to call a function in the Processing.js code. Just calling the function in onclick, as illustrated in this simple example, isn't working:
<html>
<head>
<script language="javascript" src="processing.init.js"></script>
<script language="javascript" src="processing.js"></script>
</head>
<body>
<script type="application/processing">
void restart()
{ /* does something */ }
</script><canvas>
You'll need a browser that supports HTML5 to see this content.
</canvas><br/><br/>
<img src="restart-image.png" onclick="restart()">
</body>
</html>
Any thoughts on how I can call a method in the Processing.js script when an image is clicked? (Maybe I'm making a basic HTML mistake by using img onclick?)
I would start by pulling the javascript for the onclick out of the img tag.
In a separate javascript file you can have:
document.getElementById('restartimage').onclick = function() { Processing.setup(); }
Obviously I put an id attribute on your img tag.
The setup function I noticed on this page:
http://processingjs.org/
The basic idea is that by pulling the onclick into a javascript file it will be easier to code what it should do.
you need to change the script-type to text/javascript or application/javascript first.
then place 'function' before 'restart()' function reducing 'void'.
i have used firefox 3.0.14 on ubuntu 9.04.
You can call processing functions using the Processing js object's getInstanceById function.
For example here is a function:
$(window).resize(function(){
var p=Processing.getInstanceById('processing_canvas_id');
p.resize($("#main").width(),$("#main").height());
});
Where resize is my processing function inside the processing file associated with processing_canvas_id.
This should work, enclose you image inside the anchor tag <a> image </a>
Use href tag to call the function.
<a href="javascript:restart()"> image source </a>
