if (event.key == Qt.Key_Space && currentIndex >= 0){
rectangle1.changeWordStateByIndex();
} else if ((event.key == Qt.Key_Return || event.key == Qt.Key_Enter) && currentIndex >= 0){
if (event.key == Qt.Key_Space && currentIndex >= 0){
rectangle1.changeWordStateByIndex();
} else if ((event.key == Qt.Key_Return || event.key == Qt.Key_Enter) && currentIndex >= 0){