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package main
import (
"fmt"
"math/rand"
"time"
"github.com/vbauerster/mpb/v8"
"github.com/vbauerster/mpb/v8/decor"
)
func main() {
rng := rand.New(rand.NewSource(time.Now().UnixNano()))
p := mpb.New(mpb.PopCompletedMode())
total, numBars := 100, 4
for i := 0; i < numBars; i++ {
name := fmt.Sprintf("Bar#%d:", i)
bar := p.AddBar(int64(total),
mpb.BarFillerOnComplete(fmt.Sprintf("%s has been completed", name)),
mpb.BarFillerTrim(),
mpb.PrependDecorators(
decor.OnComplete(decor.Name(name), ""),
decor.OnComplete(decor.NewPercentage(" % d "), ""),
),
mpb.AppendDecorators(
decor.OnComplete(decor.Name(" "), ""),
decor.OnComplete(decor.EwmaETA(decor.ET_STYLE_GO, 30), ""),
),
)
// simulating some work
max := 100 * time.Millisecond
for i := 0; i < total; i++ {
// start variable is solely for EWMA calculation
// EWMA's unit of measure is an iteration's duration
start := time.Now()
time.Sleep(time.Duration(rng.Intn(10)+1) * max / 10)
// we need to call EwmaIncrement to fulfill ewma decorator's contract
bar.EwmaIncrement(time.Since(start))
}
}
p.Wait()
}
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