[GH-ISSUE #895] Long text in TextView #654

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opened 2026-03-04 01:06:47 +03:00 by kerem · 3 comments

kerem commented

2026-03-04 01:06:47 +03:00

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Originally created by @marek-kuticka on GitHub (Oct 3, 2023).
Original GitHub issue: https://github.com/rivo/tview/issues/895

what would be the best option to implement TextView component, inside some Flex container, or whatever, that contains scrollable text and I can keep focus at the end? something in sense of console logger.

I have bit struggles to getting this to work. would there be any example of this?

thx a lot

Marek

Originally created by @marek-kuticka on GitHub (Oct 3, 2023). Original GitHub issue: https://github.com/rivo/tview/issues/895 Hi what would be the best option to implement TextView component, inside some Flex container, or whatever, that contains scrollable text and I can keep focus at the end? something in sense of console logger. I have bit struggles to getting this to work. would there be any example of this? thx a lot Marek

kerem closed this issue

2026-03-04 01:06:47 +03:00

kerem commented

2026-03-04 01:06:48 +03:00

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@rivo commented on GitHub (Oct 3, 2023):

You can call TextView.ScrollToEnd():

ScrollToEnd scrolls to the bottom left corner of the text if the text view is scrollable. Adding new rows to the end of the text view will cause it to scroll with the new data.

You can use TextView as a io.Writer and simply write your text to it (use SetChangedFunc() to redraw the text view). Make sure to also read the section on large texts.

@rivo commented on GitHub (Oct 3, 2023): You can call [`TextView.ScrollToEnd()`](https://pkg.go.dev/github.com/rivo/tview#TextView.ScrollToEnd): > ScrollToEnd scrolls to the bottom left corner of the text if the text view is scrollable. _Adding new rows to the end of the text view will cause it to scroll with the new data._ You can use `TextView` as a `io.Writer` and simply write your text to it (use [`SetChangedFunc()`](https://pkg.go.dev/github.com/rivo/tview#TextView.SetChangedFunc) to redraw the text view). Make sure to also read the section on [large texts](https://pkg.go.dev/github.com/rivo/tview#hdr-Large_Texts).

kerem commented

2026-03-04 01:06:48 +03:00

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@marek-kuticka commented on GitHub (Oct 3, 2023):

thx, my question was rather aimed to adding text itself. what method is most suitable, and if TextView then handles the scroll by itself.

thx

@marek-kuticka commented on GitHub (Oct 3, 2023): thx, my question was rather aimed to adding text itself. what method is most suitable, and if TextView then handles the scroll by itself. thx

kerem commented

2026-03-04 01:06:48 +03:00

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@rivo commented on GitHub (Oct 4, 2023):

No TextView will NOT automatically scroll when new content is written or appended.

Not true. TextView behaves exactly how it's described in the comment I quoted above. It will automatically scroll. It is not necessary to call ScrollToEnd() every time something is changed, like in the example @digitallyserviced posted. Once is enough.

@marek-kuticka Check out the following example which is how you could implement a continuous text stream (but again, please also look at the section about "Large Texts"):

func main() {
	app := tview.NewApplication()

	textView := tview.NewTextView().
		ScrollToEnd().
		SetChangedFunc(func() {
			app.Draw()
		})

	go func() {
		var i int
		for {
			fmt.Fprintf(textView, "%d\n", i)
			time.Sleep(10 * time.Millisecond)
			i++
		}
	}()

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

@rivo commented on GitHub (Oct 4, 2023): > No `TextView` will NOT automatically scroll when new content is written or appended. Not true. `TextView` behaves exactly how it's described in the comment I quoted above. It will automatically scroll. It is not necessary to call `ScrollToEnd()` every time something is changed, like in the example @digitallyserviced posted. Once is enough. @marek-kuticka Check out the following example which is how you could implement a continuous text stream (but again, please also look at the section about "Large Texts"): ```go func main() { app := tview.NewApplication() textView := tview.NewTextView(). ScrollToEnd(). SetChangedFunc(func() { app.Draw() }) go func() { var i int for { fmt.Fprintf(textView, "%d\n", i) time.Sleep(10 * time.Millisecond) i++ } }() if err := app.SetRoot(textView, true).Run(); err != nil { panic(err) } } ```