forked from Mirrors/bubbletea
87 lines
1.5 KiB
Go
87 lines
1.5 KiB
Go
package main
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import (
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"fmt"
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"os"
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tea "github.com/charmbracelet/bubbletea"
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)
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type model struct {
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cursor int
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choices []string
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selected map[int]struct{}
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}
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func initialModel() model {
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return model{
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choices: []string{"Buy carrots", "Buy celery", "Buy kohlrabi"},
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// A map which indicates which choices are selected. We're using
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// the map like a mathematical set. The keys refer to the indexes
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// of the `choices` slice, above.
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selected: make(map[int]struct{}),
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}
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}
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func (m model) Init() tea.Cmd {
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return nil
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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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switch msg.String() {
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case "ctrl+c", "q":
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return m, tea.Quit
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case "up", "k":
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if m.cursor > 0 {
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m.cursor--
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}
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case "down", "j":
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if m.cursor < len(m.choices)-1 {
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m.cursor++
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}
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case "enter", " ":
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_, ok := m.selected[m.cursor]
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if ok {
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delete(m.selected, m.cursor)
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} else {
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m.selected[m.cursor] = struct{}{}
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}
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}
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}
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return m, nil
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}
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func (m model) View() string {
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s := "What should we buy at the market?\n\n"
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for i, choice := range m.choices {
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cursor := " "
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if m.cursor == i {
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cursor = ">"
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}
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checked := " "
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if _, ok := m.selected[i]; ok {
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checked = "x"
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}
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s += fmt.Sprintf("%s [%s] %s\n", cursor, checked, choice)
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}
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s += "\nPress q to quit.\n"
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return s
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}
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func main() {
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p := tea.NewProgram(initialModel())
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if _, err := p.Run(); err != nil {
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fmt.Printf("Alas, there's been an error: %v", err)
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os.Exit(1)
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}
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}
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