1 files changed, 48 insertions, 0 deletions
diff --git a/_examples/dynTotal/main.go b/_examples/dynTotal/main.go
new file mode 100644
index 0000000..212ef13
--- /dev/null
+++ b/_examples/dynTotal/main.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"io"
+	"math/rand"
+	"time"
+
+	"github.com/vbauerster/mpb/v8"
+	"github.com/vbauerster/mpb/v8/decor"
+)
+
+func main() {
+	p := mpb.New(mpb.WithWidth(64))
+
+	// new bar with 'trigger complete event' disabled, because total is zero
+	bar := p.AddBar(0,
+		mpb.PrependDecorators(decor.Counters(decor.SizeB1024(0), "% .1f / % .1f")),
+		mpb.AppendDecorators(decor.Percentage()),
+	)
+
+	maxSleep := 100 * time.Millisecond
+	read := makeStream(200)
+	for {
+		n, err := read()
+		if err == io.EOF {
+			// triggering complete event now
+			bar.SetTotal(-1, true)
+			break
+		}
+		// increment methods won't trigger complete event because bar was constructed with total = 0
+		bar.IncrBy(n)
+		// following call is not required, it's called to show some progress instead of an empty bar
+		bar.SetTotal(bar.Current()+2048, false)
+		time.Sleep(time.Duration(rand.Intn(10)+1) * maxSleep / 10)
+	}
+
+	p.Wait()
+}
+
+func makeStream(limit int) func() (int, error) {
+	return func() (int, error) {
+		if limit <= 0 {
+			return 0, io.EOF
+		}
+		limit--
+		return rand.Intn(1024) + 1, nil
+	}
+}