使用tivo / tview GoLang库时获取实际的Form值

Question

It's not at all obvious to me how to get the value the user inputs for the Name input field, in below simple snippet.

package main

import (
    "fmt"
    "github.com/rivo/tview"
)

func main() {

    app := tview.NewApplication()
    form := tview.NewForm()
    form.SetTitle(" My Form ")
    form.AddInputField("Name", "", 20, nil, nil)
    form.AddButton("OK", func() { app.Stop() })
    if err := app.SetRoot(form, true).SetFocus(form).Run(); err != nil {
        panic(err)
    }
    fmt.Printf("%s
", form.GetFormItem(0))
}

Answer 1

The form has only two items, one inputfield, one button.

the part

app.SetRoot(form, true).SetFocus(form).Run() 

runs the form. Klicking the button continues the execution afterwards by stopping the app-window.

The inputfield 'Name' is put into the form first. It is accessed by form.GetFormItem(0) (by it's index).

See https://github.com/rivo/tview/blob/master/form.go row 244ff

// GetFormItem returns the form element at the given position, starting with  
// index 0. Elements are referenced in the order they were added. Buttons are  
// not included.  
func (f *Form) GetFormItem(index int) FormItem {
  return f.items[index]