Use a fun little termui app to show event ids so you can see what termui is thinking. Run it and mash some keys, click the mouse and stuff and you'll see events fill up pretty quick!

termui_event_viewer.go

package main

import (
	"fmt"
	"github.com/gizak/termui/v3"
	"github.com/gizak/termui/v3/widgets"
)

const eventMax = 30

func main() {
	// init and defer close
	err := termui.Init()
	if err != nil {
		panic(err.Error())
	}
	defer termui.Close()

	events := []string{}

	idx := 0
	for event := range termui.PollEvents() {
		// do quit
		if event.ID == "<C-c>" {
			break
		}

		paragraph := widgets.NewParagraph()
		paragraph.Title = "Event"
		paragraph.SetRect(0, 0, 50, eventMax+2)

		idx++
		formatted := fmt.Sprintf("%4d %1d %s", idx, len(event.ID), event.ID)

		if len(events) >= eventMax {
			events = append(events[1:], formatted)
		} else {
			events = append(events[:], formatted)
		}

		paragraph.Text = events[0]
		for _, s := range events[1:] {
			paragraph.Text += "\n" + s
		}

		termui.Render(paragraph)
	}
}