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2011-10-17T18:50:45.120
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You can easily add the <code>addEventListener</code> method to your object (in most browsers anyway, might not work in <code>IE < 8</code>) <pre><code>self.addEventListener = document.body.addEventListener </code></pre> However, it won't magically start triggering click events when it's clicked. You'd still have to generate those yourself by monitoring events on the <code><canvas></code> element. As such, it's definitely better to just roll your own event listener, or incorporate one from an existing library (see below) than try to inherit from the DOM one, as that can get sketchy. Odds are pretty high that you'll just want to use a <code><canvas></code> library like <a href="http://raphaeljs.com/" rel="nofollow">raphael.js</a>. Which has all of this stuff baked in, and impliments it's own <code>Element</code> object with DOM-like events. That said, if you really want to roll your own solution, it's pretty straightforward as long as you only want to capture click events inside rectangular areas (finding points on curved elements is another matter). Here's some quick pseudocode <pre><code>var buttons = []; // stores all button instances var canvas = document.getElementById('#myCanvas'); canvas.bind('mousemove',function(event){ var i = buttons.length; while(i--){ var box = { x: [buttons[i].x, buttons[i].pos.x+buttons[i].width], y: [buttons.y, buttons[i].pos.y+buttons[i].height] }; if(event.clientX > box.x[0] && event.clientX < box.x[1] && event.clientY > box.y[0] && event.clientY < box.y[1]){ buttons[i].click(); } } }); </code></pre>
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1. USDaniel Mendel
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1. COI was afraid it would not be so easy. Anyway, thanks for the post I will probably end up doing it the way you suggested in the pseudocode unfortunalty I now have to write all three mouse events I intended on using.
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