inputVerifier

Gates keyboard focus leaving this component on verify: while it answers false, Swing keeps the focus where it is, whether the user tabs away, clicks another control, or the application requests the move.

verify takes no argument: the value being validated is the one the composition already declared, so it is read from the caller's own state.

TextField(
    port,
    onValueChange = { port = it },
    modifier = SwingModifier.inputVerifier { port.toIntOrNull() in 1..65535 },
)

A component whose gate must be bypassed - a Cancel button, which has to activate whatever the focused field holds - declares verifyInputWhenFocusTarget false instead. Removing this modifier puts back the verifier the component carried before it was applied.

Parameters

See also