cview/demos/focusmanager/main.go

// Demo code for the FocusManager utility.
package main

import (
	"log"

	"github.com/gdamore/tcell/v2"
	"gitlab.com/tslocum/cbind"
	"gitlab.com/tslocum/cview"
)

func main() {
	app := cview.NewApplication()
	app.EnableMouse(true)

	input1 := cview.NewInputField()
	input1.SetLabel("InputField 1")

	input2 := cview.NewInputField()
	input2.SetLabel("InputField 2")

	input3 := cview.NewInputField()
	input3.SetLabel("InputField 3")

	input4 := cview.NewInputField()
	input4.SetLabel("InputField 4")

	grid := cview.NewGrid()
	grid.SetBorder(true)
	grid.SetTitle(" Press Tab to advance focus ")
	grid.AddItem(input1, 0, 0, 1, 1, 0, 0, true)
	grid.AddItem(input2, 0, 1, 1, 1, 0, 0, false)
	grid.AddItem(input3, 1, 1, 1, 1, 0, 0, false)
	grid.AddItem(input4, 1, 0, 1, 1, 0, 0, false)

	focusManager := cview.NewFocusManager(app.SetFocus)
	focusManager.SetWrapAround(true)
	focusManager.Add(input1, input2, input3, input4)

	inputHandler := cbind.NewConfiguration()
	for _, key := range cview.Keys.MovePreviousField {
		mod, key, ch, err := cbind.Decode(key)
		if err != nil {
			log.Fatal(err)
		}
		if key == tcell.KeyRune {
			inputHandler.SetRune(mod, ch, func(ev *tcell.EventKey) *tcell.EventKey {
				focusManager.FocusPrevious()
				return nil
			})
		} else {
			inputHandler.SetKey(mod, key, func(ev *tcell.EventKey) *tcell.EventKey {
				focusManager.FocusPrevious()
				return nil
			})
		}
	}
	for _, key := range cview.Keys.MoveNextField {
		mod, key, ch, err := cbind.Decode(key)
		if err != nil {
			log.Fatal(err)
		}
		if key == tcell.KeyRune {
			inputHandler.SetRune(mod, ch, func(ev *tcell.EventKey) *tcell.EventKey {
				focusManager.FocusNext()
				return nil
			})
		} else {
			inputHandler.SetKey(mod, key, func(ev *tcell.EventKey) *tcell.EventKey {
				focusManager.FocusNext()
				return nil
			})
		}
	}

	app.SetInputCapture(inputHandler.Capture)

	app.SetRoot(grid, true)
	if err := app.Run(); err != nil {
		panic(err)
	}
}