Detect mouseover of certain points within an HTML canvas?

Question

I\'ve built an analytical data visualization engine for Canvas and have been requested to add tooltip-like hover over data elements to display detailed metrics for the data

Answer 1

This could be done using the method ctx.isPointInPath, but it is not implemented in ExCanvas for IE. But another solution would be to use HTML maps, like I did for this little library : http://phenxdesign.net/projects/phenx-web/graphics/example.htm you can get inspiration from it, but it is still a little buggy.