```var readMore by remember { mutableStateOf(false) } var clickText by remember { mutableStateOf("Re...

# compose

[Kulwinder Singh]

var readMore by remember { mutableStateOf(false) }
var clickText by remember { mutableStateOf("Read More") }
var showClickButton by remember { mutableStateOf(false) }
val annotatedText = buildAnnotatedString {
    withStyle(style = SpanStyle(color = MaterialTheme.colors.OnSurface800)) {
        append(text + " ")
    }
    
    if (showClickButton) {
        pushStringAnnotation("click", "click")
        withStyle(style = SpanStyle(color = MaterialTheme.colors.Interactive500)) {
            append(clickText)
        }
        pop()
    }
}

ClickableText(
        text = annotatedText,
        style = MaterialTheme.typography.smallBody,
        overflow = TextOverflow.Ellipsis,
        maxLines = if (readMore) Int.MAX_VALUE else 2,
        onTextLayout = { showClickButton = it.hasVisualOverflow }
    )

I am trying to “Read More” button at the end of text view but looks like buildAnnotatedString does not recompose when showClickButton or state change, so here how can i achieve this ?

[agrosner]

derivedStateOf

[Kulwinder Singh]

Can you please share some sample or source of how i can achieve it

[agrosner]

https://android-review.googlesource.com/c/platform/frameworks/support/+/1434397/5/compose/runtime/runtime/samples/src/main/java/androidx/compose/runtime/samples/EffectSamples.kt#131

[Kulwinder Singh]

Sorry, i don’t think it will work in my case

[Zach Klippenstein (he/him) [MOD]]

Hm, that should still work even without derivedStateOf (although using derivedStateOf would still probably be more efficient)

[Zach Klippenstein (he/him) [MOD]]

Is your function recomposing when the text layout changes?

[Kulwinder Singh]

@Zach Klippenstein (he/him) [MOD] no above code is not working

[Zach Klippenstein (he/him) [MOD]]

“not working” can mean a lot of different things 😉

[Zach Klippenstein (he/him) [MOD]]

i copied your code and it works as expected for me

[Zach Klippenstein (he/him) [MOD]]

i would put some breakpoints or log statements in and see if onTextLayout is getting called and giving you the values you expect