Jetpack Compose: Text Alignment and Display Issues in Button within SegmentedControl

Question

I'm building a segmented control in Jetpack Compose using a Row with Button composables to create a visual toggle. While the button size is working as expected, the text within the buttons is not displaying properly. Here's my SegmentedControl composable:

@OptIn(ExperimentalMaterial3Api::class, androidx.compose.ui.tooling.preview.Preview::class)
@Composable
fun SegmentedControl(
    items: List<String>,
    selectedItemIndex: Int,
    onSelectedItemChange: (Int) -> Unit,
    modifier: Modifier = Modifier // Added this modifier parameter
) {
    Row(
        modifier = modifier.fillMaxWidth(), // Fill width with applied modifier
        horizontalArrangement = Arrangement.SpaceBetween,
        verticalAlignment = Alignment.CenterVertically
    ) {
        items.forEachIndexed { index, label ->
            Button(
                onClick = { onSelectedItemChange(index) },
                shape = if (index == selectedItemIndex) {
                    RoundedCornerShape(8.dp)
                } else {
                    CircleShape
                },
                colors = ButtonDefaults.buttonColors(
                    containerColor = if (index == selectedItemIndex) Color.LightGray else Color.White,
                    contentColor = if (index == selectedItemIndex) Color.Black else Color.Black
                ),
                modifier = Modifier
                    .padding(4.dp)
                    .weight(1f)
            ) {
                // Apply weight to a Row inside the Button
                Row(
                    modifier = Modifier
                        .fillMaxWidth()
                        .weight(1f), // Apply weight to the Row
                    horizontalArrangement = Arrangement.Start //  Align text to the start of the row
                ) {
                    Text(
                        text = label,
                        fontFamily = helveticaNormal,
                        fontSize = 10.sp,
                        modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)
                    )
                }
            }
        }
    }
}

The buttons are the correct size, but the text inside them is either not visible or not aligned properly.

I've tried adjusting the padding and fontSize of the Text composable. I've experimented with different horizontalArrangement values within the inner Row.

BenjyTec · Accepted Answer · 2024-07-09 08:44:11Z

2

I am assuming that you want to align the text to the left inside of the Button.

The content of the Button by default has a RowScope, so you don't need an extra Row inside of the Button. You can apply the weight Modifier directly onto the Text to make it fill the button width. Then, specify the textAlign attribute and set it to TextAlign.Start.

Please update your code like this:

Button(
    //...
) {
    Text(
        text = label,
        textAlign = TextAlign.Start,  // set text alignment here
        fontSize = 10.sp,
        modifier = Modifier.weight(1f)  // add weight here, remove padding
    )

}

Output:

edited Jul 9, 2024 at 8:44

answered Jul 9, 2024 at 8:38

BenjyTec

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1 Comment

Aashish Ace Over a year ago

hey man thanks a tone ... this worked.

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