public static boolean dispatchKeyType(Event e, Handler<KeyEvent> handler) {
final KeyEvent event = EventTranslator.toKeyEvent(e);
if (e.getCharCode() == 0) return true;
if (e.getCharCode() == '\n') return true;
if (e.getCharCode() == '\r') return true;
if (event.has(ModifierKey.META) || event.has(ModifierKey.ALT) || event.has(ModifierKey.CONTROL))
return true;
handler.handle(event);
return !event.isConsumed();
}
public static boolean dispatchKeyRelease(Event e, Handler<KeyEvent> handler) {
final KeyEvent event = EventTranslator.toKeyEvent(e);
handler.handle(event);
return !event.isConsumed();
}
public static boolean dispatchKeyPress(Event e, Handler<KeyEvent> handler) {
final KeyEvent event = EventTranslator.toKeyEvent(e);
handler.handle(event);
// disable back button
if (event.getKey() == Key.BACKSPACE) return false;
// disable navigation keys to prevent browser scrolling
if (event.getKey() == Key.UP
|| event.getKey() == Key.DOWN
|| event.getKey() == Key.LEFT
|| event.getKey() == Key.RIGHT) return false;
// disable space scrolling in case of unhandled space
if (event.getKey() == Key.SPACE) return false;
// disable shift+arrow selection
if (event.is(KeyStrokeSpecs.SELECT_BEFORE) || event.is(KeyStrokeSpecs.SELECT_AFTER))
return false;
// disable back forward with Ctrl/Cmd + [ / ]
if (event.is(KeyStrokeSpecs.MATCHING_CONSTRUCTS)) return false;
// disable tab navigation
if (event.is(Key.TAB) || event.is(Key.TAB, ModifierKey.SHIFT)) return false;
return !event.isConsumed();
}