[GH-ISSUE #341] The behavior of TextView.SetScrollable() is very strange #257

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opened 2026-03-04 01:03:24 +03:00 by kerem · 2 comments

kerem commented

2026-03-04 01:03:24 +03:00

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Originally created by @dzpao on GitHub (Aug 31, 2019).
Original GitHub issue: https://github.com/rivo/tview/issues/341

Talk is cheap, show you the code:

package main

import (
	"fmt"
	"time"

	"github.com/rivo/tview"
)

func main() {
	app := tview.NewApplication()
	textView := tview.NewTextView()
	textView.SetScrollable(false)  // <------ Please note here
	textView.SetBorder(true)
	textView.SetChangedFunc(func() {
		text := textView.GetText(false)
		textView.SetTitle(fmt.Sprintf("%d bytes", len(text)))
		app.Draw()
	})

	go func() {
		n := 1
		for {
			fmt.Fprintf(textView, "line %d\n", n)
			n++
			time.Sleep(200 * time.Millisecond)
		}
	}()

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

When I ran this code, I observed that the screen would be empty after it was full.
But according to the TextView documentation, it should be that only text that is above the top of the screen will be discarded.

If the text is not scrollable, any text above the top visible line is discarded.

So what am I doing wrong?

Originally created by @dzpao on GitHub (Aug 31, 2019). Original GitHub issue: https://github.com/rivo/tview/issues/341 Talk is cheap, show you the code: ```Golang package main import ( "fmt" "time" "github.com/rivo/tview" ) func main() { app := tview.NewApplication() textView := tview.NewTextView() textView.SetScrollable(false) // <------ Please note here textView.SetBorder(true) textView.SetChangedFunc(func() { text := textView.GetText(false) textView.SetTitle(fmt.Sprintf("%d bytes", len(text))) app.Draw() }) go func() { n := 1 for { fmt.Fprintf(textView, "line %d\n", n) n++ time.Sleep(200 * time.Millisecond) } }() if err := app.SetRoot(textView, true).Run(); err != nil { panic(err) } } ``` When I ran this code, I observed that the screen would be empty after it was full. But according to the TextView documentation, it should be that only text that is above the top of the screen will be discarded. > If the text is not scrollable, any text above the top visible line is discarded. So what am I doing wrong?

kerem closed this issue

2026-03-04 01:03:24 +03:00

kerem commented

2026-03-04 01:03:25 +03:00

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Owner

@dzpao commented on GitHub (Aug 31, 2019):

I have retired several versions and located the problem that should be introduced by fc28d64. The behavior of previous versions of this version is as expected.

@dzpao commented on GitHub (Aug 31, 2019): I have retired several versions and located the problem that should be introduced by fc28d64. The behavior of previous versions of this version is as expected.

kerem commented

2026-03-04 01:03:25 +03:00

Author

Owner

@rivo commented on GitHub (Oct 18, 2019):

Thanks. It was really just a typo in the code. Should be fixed now.

@rivo commented on GitHub (Oct 18, 2019): Thanks. It was really just a typo in the code. Should be fixed now.

kerem referenced this issue

2026-03-04 01:08:25 +03:00

[PR #257] [CLOSED] Add a method to Modal for removal of the buttons #890