bool QChar::isDigit(uint ucs4)
static QString symbolIsFigure(const QString& input){
C++ (Qt)for (int i = 0; i < input.length(); i++) { // Or: if (input.at(i).isDigit()) { if (input[i].isDigit()) { // ... }}
input[i]
QChar::isDigit(input[i])
C++ (Qt)frame->installEventFilter(this); bool Widget::eventFilter(QObject *object, QEvent *event) { if (object == frame && event->type() == QEvent::MouseButtonPress) { menu->popup(QCursor::pos()); } return QObject::eventFilter(object, event);}