isControlCharacter static method
- String label
Returns true if the given label represents a Unicode control character.
Examples of control characters are characters like "U+000A LINE FEED (LF)" or "U+001B ESCAPE (ESC)".
See en.wikipedia.org/wiki/Unicode_control_characters for more information.
Used by RawKeyEvent subclasses to help construct IDs.
Implementation
static bool isControlCharacter(String label) {
if (label.length != 1) {
return false;
}
final int codeUnit = label.codeUnitAt(0);
return (codeUnit <= 0x1f && codeUnit >= 0x00) || (codeUnit >= 0x7f && codeUnit <= 0x9f);
}