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/*
A slider that goes between a High and Low time
*/
package gadgets
import (
"fmt"
"time"
"go.wit.com/gui"
"go.wit.com/log"
)
type Duration struct {
p *gui.Node // parent widget
l *gui.Node // label widget
s *gui.Node // slider widget
Label string
Low time.Duration
High time.Duration
Duration time.Duration
Custom func()
}
func (n *Duration) Set(d time.Duration) {
var timeRange, step, offset time.Duration
if d > n.High {
d = n.High
}
if d < n.Low {
d = n.Low
}
// set the duration
n.Duration = d
// figure out the integer offset for the Slider GUI Widget
timeRange = n.High - n.Low
step = timeRange / 1000
if step == 0 {
log.Log(INFO, "duration.Set() division by step == 0", n.Low, n.High, timeRange, step)
n.s.Set(0)
return
}
offset = d - n.Low
i := int(offset / step)
log.Log(INFO, "duration.Set() =", n.Low, n.High, d, "i =", i)
// n.s.I = i
n.s.Set(i)
n.s.Custom()
}
func NewDurationSlider(n *gui.Node, label string, low time.Duration, high time.Duration) *Duration {
d := Duration{
p: n,
Label: label,
High: high,
Low: low,
}
// various timeout settings
d.l = n.NewLabel(label)
d.s = n.NewSlider(label, 0, 1000)
d.s.Custom = func() {
d.Duration = low + (high-low)*time.Duration(d.s.Int())/1000
log.Println("d.Duration =", d.Duration)
s := fmt.Sprintf("%s (%v)", d.Label, d.Duration)
d.l.SetText(s)
if d.Custom != nil {
d.Custom()
}
}
return &d
}
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