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doc(credit-card-form): add example with credit card inputs
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package main | ||
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import ( | ||
"fmt" | ||
"log" | ||
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"github.com/charmbracelet/bubbles/textinput" | ||
tea "github.com/charmbracelet/bubbletea" | ||
"github.com/charmbracelet/lipgloss" | ||
) | ||
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func main() { | ||
p := tea.NewProgram(initialModel()) | ||
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if err := p.Start(); err != nil { | ||
log.Fatal(err) | ||
} | ||
} | ||
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type tickMsg struct{} | ||
type errMsg error | ||
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const ( | ||
ccn = iota | ||
exp | ||
cvv | ||
) | ||
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const ( | ||
hotPink = lipgloss.Color("#FF06B7") | ||
darkGray = lipgloss.Color("#767676") | ||
) | ||
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var ( | ||
inputStyle = lipgloss.NewStyle().Foreground(hotPink) | ||
continueStyle = lipgloss.NewStyle().Foreground(darkGray) | ||
) | ||
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type model struct { | ||
inputs []textinput.Model | ||
focused int | ||
err error | ||
} | ||
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func initialModel() model { | ||
var inputs []textinput.Model = make([]textinput.Model, 3) | ||
inputs[ccn] = textinput.New() | ||
inputs[ccn].Placeholder = "4505 **** **** 1234" | ||
inputs[ccn].Focus() | ||
inputs[ccn].CharLimit = 20 | ||
inputs[ccn].Width = 30 | ||
inputs[ccn].Prompt = "" | ||
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inputs[exp] = textinput.New() | ||
inputs[exp].Placeholder = "MM/YY " | ||
inputs[exp].CharLimit = 5 | ||
inputs[exp].Width = 5 | ||
inputs[exp].Prompt = "" | ||
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inputs[cvv] = textinput.New() | ||
inputs[cvv].Placeholder = "XXX" | ||
inputs[cvv].CharLimit = 3 | ||
inputs[cvv].Width = 5 | ||
inputs[cvv].Prompt = "" | ||
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return model{ | ||
inputs: inputs, | ||
focused: 0, | ||
err: nil, | ||
} | ||
} | ||
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func (m model) Init() tea.Cmd { | ||
return textinput.Blink | ||
} | ||
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func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) { | ||
var ( | ||
cmds []tea.Cmd = make([]tea.Cmd, len(m.inputs)) | ||
) | ||
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switch msg := msg.(type) { | ||
case tea.KeyMsg: | ||
switch msg.Type { | ||
case tea.KeyEnter: | ||
if m.focused == len(m.inputs)-1 { | ||
return m, tea.Quit | ||
} else { | ||
m.nextInput() | ||
} | ||
case tea.KeyCtrlC, tea.KeyEsc: | ||
return m, tea.Quit | ||
case tea.KeyShiftTab, tea.KeyCtrlP: | ||
m.prevInput() | ||
case tea.KeyTab, tea.KeyCtrlN: | ||
m.nextInput() | ||
} | ||
for i := range m.inputs { | ||
m.inputs[i].Blur() | ||
} | ||
m.inputs[m.focused].Focus() | ||
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// We handle errors just like any other message | ||
case errMsg: | ||
m.err = msg | ||
return m, nil | ||
} | ||
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for i := range m.inputs { | ||
m.inputs[i], cmds[i] = m.inputs[i].Update(msg) | ||
} | ||
return m, tea.Batch(cmds...) | ||
} | ||
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func (m model) View() string { | ||
return fmt.Sprintf( | ||
` Total: $21.50: | ||
%s | ||
%s | ||
%s %s | ||
%s %s | ||
%s | ||
`, | ||
inputStyle.Width(30).Render("Card Number"), | ||
m.inputs[ccn].View(), | ||
inputStyle.Width(6).Render("EXP"), | ||
inputStyle.Width(6).Render("CVV"), | ||
m.inputs[exp].View(), | ||
m.inputs[cvv].View(), | ||
continueStyle.Render("Continue ->"), | ||
) + "\n" | ||
} | ||
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// nextInput focuses the next input field | ||
func (m *model) nextInput() { | ||
m.focused = (m.focused + 1) % len(m.inputs) | ||
} | ||
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// prevInput focuses the previous input field | ||
func (m *model) prevInput() { | ||
m.focused-- | ||
// Wrap around | ||
if m.focused < 0 { | ||
m.focused = len(m.inputs) - 1 | ||
} | ||
} |