Adds tooltip content that shows the series name and the (time, value) of the selected point.
seriesname time, value
Registers the tooltip-content provider with the ChartContext so that when d3 fires a mouse-over
event on a series. The content provider is returns the {@link addTooltipContent} function
when called. And when called the {@link addTooltipContent} function adds the actual tooltip
content to the SVG element.
Adds tooltip content that shows the series name and the (time, value) of the selected point.
Registers the tooltip-content provider with the
ChartContext
so that when d3 fires a mouse-over event on a series. The content provider is returns the {@link addTooltipContent} function when called. And when called the {@link addTooltipContent} function adds the actual tooltip content to the SVG element.