then

fun InputTransformation.then(next: InputTransformation): InputTransformation

Creates a filter chain that will run next after this. Filters are applied sequentially, so any changes made by this filter will be visible to next.

The returned filter will use the KeyboardOptions from next if non-null, otherwise it will use the options from this transformation.

Parameters

Code Examples

BasicTextFieldInputTransformationChainingSample

fun BasicTextFieldInputTransformationChainingSample() {
    val removeFirstEFilter = InputTransformation {
        val index = asCharSequence().indexOf('e')
        if (index != -1) {
            replace(index, index + 1, "")
        }
    }
    val printECountFilter = InputTransformation {
        println("found ${asCharSequence().count { it == 'e' }} 'e's in the string")
    }
    // Returns a filter that always prints 0 e's.
    removeFirstEFilter.then(printECountFilter)
    // Returns a filter that prints the number of e's before the first one is removed.
    printECountFilter.then(removeFirstEFilter)
}