import (
	"github.com/qianlnk/pgbar"
)

	pgb := pgbar.New("多线程进度条")
	pgbar.Println("进度条1")
	b := pgb.NewBar("1st", 20000)
	pgbar.Println("进度条2")
	b2 := pgb.NewBar("2st", 10000)
	pgbar.Println("进度条3")
	b3 := pgb.NewBar("3st", 30000)

	b.SetSpeedSection(900, 100)
	b2.SetSpeedSection(900, 100)
	b3.SetSpeedSection(900, 100)

	pgbar.Println("独立进度条")
	b4 := pgbar.NewBar(0, "4st", 4000)
	var wg sync.WaitGroup
	wg.Add(4)
	go func() {
		defer wg.Done()
		for i := 0; i < 20000; i++ {
			b.Add()
			time.Sleep(time.Second / 2000)
		}
	}()

	go func() {
		defer wg.Done()
		for i := 0; i < 10000; i++ {
			b2.Add()
			time.Sleep(time.Second / 1000)
		}
	}()
	go func() {
		defer wg.Done()
		for i := 0; i < 30000; i++ {
			b3.Add()
			time.Sleep(time.Second / 3000)
		}
	}()

	go func() {
		defer wg.Done()
		for i := 0; i < 4000; i++ {
			b4.Add()
			time.Sleep(time.Second / 300)
		}
	}()
	wg.Wait()

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github.com/qianlnk/[email protected]/bar.go:114 

if (lastRate != b.rate || lastSpeed != b.speed) && !b.closed  {
    b.advance <- true
}