Question

I found this solution.

If type of chart is pie, how specify parameters (x,y) of highlight(x, y)?

Thanks

Sorry for my bad English.

Answer 1

Unfortunately, flot doesn’t expose the pie highlighting code to the user. So we are pretty much out of luck, but what may work for you is synthesizing a click event at the appropriate place on the page:

$("#highligher").click(function () {
    var e = jQuery.Event('click');
    e.pageX = 250; //add a made up x/y coordinate to the click event
    e.pageY = 250;
    $('#plot canvas:first').trigger(e); //trigger the click event on the canvas
});

Here it is in action: http://jsfiddle.net/ryleyb/mHJm5/

The problem is you have to know where the slice you want to highlight is already. This would be easy enough to set if the graph is static. If it’s a dynamic graph, you’d have to dig into the source of the pie code to figure out how to calculate where the pie slice is. It might be easier in that case to just have a copy of all the pie functions and manually draw on the pie overlay.