44 lines
912 B
Go
44 lines
912 B
Go
package chart
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// GenerateTicksWithStep generates a set of ticks.
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func GenerateTicksWithStep(ra Range, step float64, vf ValueFormatter) []Tick {
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var ticks []Tick
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min, max := ra.Min, ra.Max
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for cursor := min; cursor <= max; cursor += step {
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ticks = append(ticks, Tick{
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Value: cursor,
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Label: vf(cursor),
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})
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// this guard is in place in case step is super, super small.
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if len(ticks) > DefaultTickCountSanityCheck {
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return ticks
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}
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}
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return ticks
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}
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// Tick represents a label on an axis.
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type Tick struct {
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Value float64
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Label string
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}
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// Ticks is an array of ticks.
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type Ticks []Tick
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// Len returns the length of the ticks set.
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func (t Ticks) Len() int {
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return len(t)
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}
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// Swap swaps two elements.
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func (t Ticks) Swap(i, j int) {
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t[i], t[j] = t[j], t[i]
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}
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// Less returns if i's value is less than j's value.
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func (t Ticks) Less(i, j int) bool {
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return t[i].Value < t[j].Value
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}
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