Add a mouseOver delay
I would like to be able to set a delay for mouseOver event firing. Currently, the mouseOver event fires immediately resulting in multiple firings as the cursor is dragged across a chart. For mouseOver event functions that require some time to process the results can look choppy and confusing. This would be especially nice for heatmaps where central points cannot be reached without mousing over other points.
The typical implementation would be that you set a timeout in the mouseOver event, and clear the timeout in mouseOut.
- Original, without delay: http://jsfiddle.net/gh/get/jquery/1.7.2/highslide-software/highcharts.com/tree/master/samples/highcharts/plotoptions/series-point-events-mouseover/
- Modified, with delay: http://jsfiddle.net/highcharts/9so4xkd0/