CODEWITHSUNDEEP
c++qtqt5qcombobox
Theodore Tang
Theodore Tang

Reputation: 1021

How to disable shortcuts for QComboBox in qt?

I searched for the answers online, but I did not really find one that solved my problem. My question is like: I have a QComboBox, let's say I added three items to this:

ui->comboBox->addItem("First");
ui->comboBox->addItem("Second");
ui->comboBox->addItem("Third");

Then if I press the S on the keyboard, the item will change to Second, if I press T, so item will just change to Third.

How can I disable this?

Upvotes: 1

Views: 709

Answers (1)

eyllanesc
eyllanesc

Reputation: 243955

A possible solution is to implement an eventfilter that prevents the letters from being used in the QComboBox:

#include <QApplication>
#include <QComboBox>
#include <QKeyEvent>

class Helper: public QObject{
    QComboBox *m_combo;
public:
    using QObject::QObject;
    void setComboBox(QComboBox *combo){
        m_combo = combo;
        m_combo->installEventFilter(this);
    }
    bool eventFilter(QObject *watched, QEvent *event){
        if(m_combo){
            if(m_combo == watched && event->type() == QEvent::KeyPress){
               QKeyEvent *ke = static_cast<QKeyEvent *>(event);
               if(!ke->text().isEmpty())
                    return true;
            }
        }
        return QObject::eventFilter(watched, event);
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QComboBox w;
    w.addItems({"First", "Second","Third"});
    Helper helper;
    helper.setComboBox(&w);
    w.show();
    return a.exec();
}

Upvotes: 2

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