prepare to switch ui library

1 files changed, 3 insertions, 35 deletions

diff --git a/pressure/pressure.go b/pressure/pressure.go
index da1ab1e..820a8cf 100644
--- a/pressure/pressure.go
+++ b/pressure/pressure.go
@@ -1,10 +1,5 @@
 package pressure
 
-import (
-	"errors"
-	"fmt"
-)
-
 type Pressure float32
 
 const (
@@ -14,35 +9,8 @@ const (
 	PoundsPerSquareInch Pressure = 6_894.757
 )
 
-// UnitStrings returns a slice of strings, each representing a
-// unit.
-// This is necessary because giu.Combo only works with strings.
-func UnitStrings() []string {
-	return []string{"Pa", "kPa", "bar", "psi"}
-}
-
-const (
-	DefaultUnit Pressure = Kilopascal
-	// DefaultUnitIndex is used to index UnitStrings().
-	DefaultUnitIndex int32 = 1 // kPa
-)
-
-func UnitFromString(s string) (Pressure, error) {
-	// Each case corresponds to a value in UnitStrings().
-	switch s {
-	case "Pa":
-		return Pascal, nil
-	case "kPa":
-		return Kilopascal, nil
-	case "bar":
-		return Bar, nil
-	case "psi":
-		return PoundsPerSquareInch, nil
-	default:
-		return *new(Pressure), errors.New(fmt.Sprintf("invalid unit: '%s'", s))
-	}
+func (p Pressure) As(unit Pressure) float32 {
+	return float32(p / unit)
 }
 
-func Atmospheric() Pressure {
-	return 1 * Bar
-}
+const Atmospheric = Bar