package widget
import (
"gioui.org/gesture"
"gioui.org/layout"
)
type Enum struct {
clicks []gesture.Click
values []string
value string
}
func index(vs []string, t string) int {
for i, v := range vs {
if v == t {
return i
}
}
return -1
}
// Value processes events and returns the last selected value, or
// the empty string.
func (e *Enum) Value(gtx *layout.Context) string {
for i := range e.clicks {
for _, ev := range e.clicks[i].Events(gtx) {
switch ev.Type {
case gesture.TypeClick:
e.value = e.values[i]
}
}
}
return e.value
}
// Layout adds the event handler for key.
func (rg *Enum) Layout(gtx *layout.Context, key string) {
if index(rg.values, key) == -1 {
rg.values = append(rg.values, key)
rg.clicks = append(rg.clicks, gesture.Click{})
rg.clicks[len(rg.clicks)-1].Add(gtx.Ops)
} else {
idx := index(rg.values, key)
rg.clicks[idx].Add(gtx.Ops)
}
}
func (rg *Enum) SetValue(value string) {
rg.value = value
}