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Custom simple numeric text field for jetpack compose
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// imports... | |
// just a wrapper to TextFiel composable, but validates the input to only numbers. | |
@Composable | |
fun NumericTextField( | |
value: Long = 0L, | |
minimumValue: Long = Long.MIN_VALUE, | |
maximumValue: Long = Long.MAX_VALUE, | |
modifier: Modifier = Modifier, | |
onLessMinimumValueEntered: (Long) -> Unit = {}, | |
onHigherMaximumValueEntered: (Long) -> Unit = {}, | |
onValueChange: (Long) -> Unit = {} | |
) { | |
// here we don't use "remember" because we don't want to store to make it update based on outside events | |
val numValue = mutableStateOf(value.toString()) | |
TextField( | |
value = numValue.value, | |
modifier = modifier, | |
onValueChange = { | |
val filteredString = it.filter { c -> c.isDigit() } | |
if (filteredString.isNotEmpty()) { | |
val number = filteredString.toLong() | |
if (number < minimumValue) { | |
onLessMinimumValueEntered(number) | |
} else if (number > maximumValue) { | |
onHigherMaximumValueEntered(number) | |
} else { | |
numValue.value = number.toString() | |
onValueChange(number) | |
} | |
} else { | |
numValue.value = "" | |
onValueChange(0L) | |
} | |
} | |
) | |
} |
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