APIcomponents

Type ChartState

type ChartState struct {
	// contains filtered or unexported fields
}

ChartState is the caller-owned state of one chart: the hovered point and the caches that keep a steady chart from allocating. Keep it as long as the chart lives and pass the same one every paint. A nil state is allowed, and makes the chart format its labels and tooltip afresh each paint.

Methods

Clear#

func (state *ChartState) Clear()

Clear removes the hover.

Hover#

func (state *ChartState) Hover(index int)

Hover sets the hovered data point; a negative index clears it.

Index#

func (state *ChartState) Index() (int, bool)

Index is the hovered data point.