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