isCharacterAZ method
isCharacterAZ returns true if the keyEvent.character is printable.
Implementation
bool isCharacterAZ() {
String chars = characterCharacter();
if (chars.isEmpty) {
return (false);
}
for (var char in chars.runes) {
if (char <= 31) {
return (false);
}
if (char >= 127 && char <= 159) {
return (false);
}
}
return (true);
}