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package main
// A simple example that shows how to render an animated progress bar. In this
// example we bump the progress by 25% every two seconds, animating our
// progress bar to its new target state.
//
// It's also possible to render a progress bar in a more static fashion without
// transitions. For details on that approach see the progress-static example.
import (
"fmt"
"os"
"strings"
"time"
"github.com/charmbracelet/bubbles/progress"
tea "github.com/charmbracelet/bubbletea"
"github.com/charmbracelet/lipgloss"
)
const (
padding = 2
maxWidth = 80
)
var helpStyle = lipgloss.NewStyle().Foreground(lipgloss.Color("#626262")).Render
func main() {
m := model{
progress: progress.New(progress.WithDefaultGradient()),
}
if _, err := tea.NewProgram(m).Run(); err != nil {
fmt.Println("Oh no!", err)
os.Exit(1)
}
}
type tickMsg time.Time
type model struct {
progress progress.Model
}
func (m model) Init() tea.Cmd {
return tickCmd()
}
func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
switch msg := msg.(type) {
case tea.KeyMsg:
return m, tea.Quit
case tea.WindowSizeMsg:
m.progress.Width = msg.Width - padding*2 - 4
if m.progress.Width > maxWidth {
m.progress.Width = maxWidth
}
return m, nil
case tickMsg:
if m.progress.Percent() == 1.0 {
return m, tea.Quit
}
// Note that you can also use progress.Model.SetPercent to set the
// percentage value explicitly, too.
cmd := m.progress.IncrPercent(0.25)
return m, tea.Batch(tickCmd(), cmd)
// FrameMsg is sent when the progress bar wants to animate itself
case progress.FrameMsg:
progressModel, cmd := m.progress.Update(msg)
m.progress = progressModel.(progress.Model)
return m, cmd
default:
return m, nil
}
}
func (m model) View() string {
pad := strings.Repeat(" ", padding)
return "\n" +
pad + m.progress.View() + "\n\n" +
pad + helpStyle("Press any key to quit")
}
func tickCmd() tea.Cmd {
return tea.Tick(time.Second*1, func(t time.Time) tea.Msg {
return tickMsg(t)
})
}
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