hatmill/attribute/step.go

package attribute

import (
	"strconv"

	"git.codemonkeysoftware.net/b/hatmill"
)

type StepValue float32

func (v *StepValue) String() string {
	if v == nil {
		return "any"
	}
	return strconv.FormatFloat(float64(*v), 'G', -1, 32)
}

func StepAny() *StepValue {
	return nil
}

func StepFloat(value float32) *StepValue {
	return (*StepValue)(&(value))
}

// Step indicates the minimum allowed change to a number input.
func Step(value *StepValue) hatmill.Attrib {
	var attr = hatmill.Attrib{Key: "step"}
	if value == nil {
		attr.Value = String("any")
	} else {
		attr.Value = String(strconv.FormatFloat(float64(*value), 'G', -1, 32))
	}
	return attr
}