Unable to update primitives

[zmnpl]

Hi, maybe it's jut too late and honestly I'm feeling stupid to ask... But I am unable to update primitves once the app is run. Take the minimal example from "Hello World":

package main

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

func main() {
	app := tview.NewApplication()
	box := tview.NewBox().SetBorder(true).SetTitle("Hello, world!")
	if err := app.SetRoot(box, true).Run(); err != nil {
		panic(err)
	}
	// time.Sleep(time.Second)
	// fmt.Println(5*time.Second)
	box.SetTitle("foo")
	app.Draw()
}

The box title simply doesn't change. It seems that this part of the code is not even reached until I terminate the application.
I added the commented lines and those only seem to be executed after I Ctrl+C'd the app.

Please enlighten me. I know I'm missing something obvious... what am I doing wrong =)

[Bios-Marcel]

The call to Run is blocking, therefore the following code only gets executed if you kill the application, which is what happens when hitting Ctrl-C. If you wanna execute any further logic, trigger it either by user interaction or start a new goroutine and use QueueUpdateDraw like this:

go func() {
    time.Sleep(5*time.Second)
    app.QueueUpdateDraw(func() {
        box.SetTitle("New")
    })
}()
app.Run()

[zmnpl]

Thats spot on. Thank you and have a good day kind sir!