Progress Bar

A ProgressBar is a visual indicator that represents the completion status of a task or process in Fyne.

Basic Progress

Show Code

package main

import (
  "time"

  "fyne.io/fyne/v2"
  "fyne.io/fyne/v2/app"
  "fyne.io/fyne/v2/container"
  "fyne.io/fyne/v2/data/binding"
  "fyne.io/fyne/v2/widget"
)

func main() {
  myApp := app.New()
  myWindow := myApp.NewWindow("Progress Bar")

  progressValue := binding.NewFloat()
  progress := widget.NewProgressBarWithData(progressValue)

  startBtn := widget.NewButton("Start Progress", func() {
    go func() {
      for i := 0.0; i <= 1.0; i += 0.1 {
        time.Sleep(300 * time.Millisecond)
        progressValue.Set(i)
      }
    }()
  })

  myWindow.SetContent(container.NewVBox(
    widget.NewLabel("Progress Bar"),
    progress,
    startBtn,
  ))

  myWindow.Resize(fyne.NewSize(300, 150))
  myWindow.ShowAndRun()
}

Infinite Progress Bar

Show Code

package main

import (
  "time"

  "fyne.io/fyne/v2"
  "fyne.io/fyne/v2/app"
  "fyne.io/fyne/v2/container"
  "fyne.io/fyne/v2/data/binding"
  "fyne.io/fyne/v2/widget"
)

func main() {
  myApp := app.NewWithID("app.com.progressbar")
  myWindow := myApp.NewWindow("Infinite ProgressBar")

  status := binding.NewString()
  status.Set("Idle")

  statusLabel := widget.NewLabelWithData(status)

  progress := widget.NewProgressBarInfinite()
  progress.Hide()

  startBtn := widget.NewButton("Start Task", func() {
    fyne.Do(func() {
      progress.Show()
      status.Set("Processing...")
    })

    go func() {
      // Simulate long-running task
      time.Sleep(5 * time.Second)

      // Safely update UI from goroutine
      fyne.Do(func() {
        status.Set("Done")
        progress.Hide()
      })
    }()
  })

  content := container.NewVBox(
    statusLabel,
    progress,
    startBtn,
  )

  myWindow.SetContent(content)
  myWindow.Resize(fyne.NewSize(300, 150))
  myWindow.ShowAndRun()
}