QKeyPress - Simulating key press

sayan275

Re: [SOLVED] QKeyPress - Simulating key press

I tried the same approach, but not able to get written on the lineEdit widget

ui->lineEdit->setFocus();
    QKeyEvent *key_press = new QKeyEvent(QKeyEvent::KeyPress, Qt::Key_X, Qt::NoModifier);
QApplication::sendEvent(ui->lineEdit, key_press);

Alternately

QApplication::postEvent(ui->lineEdit, key_press);

also didn't succeed.

I tried the below also and didn't get any result.

QKeyEvent key(QEvent::KeyPress, Qt::Key_X, Qt::NoModifier);
QApplication::sendEvent(ui->lineEdit, &key);
if (key.isAccepted()) {
      qDebug()<<"everything is ok";
} else {
      qDebug()<<"something wrong";
}

Please suggest what am I missing.

Regards,
Sayan

mrjj

Hi
For my keyboard i do like this

auto FOCUSOBJ = QGuiApplication::focusObject();
QString keyStr(QKeySequence(key).toString()); // key is int with keycode
QKeyEvent pressEvent = QKeyEvent(QEvent::KeyPress, key, Qt::NoModifier, keyStr);
QKeyEvent releaseEvent = QKeyEvent(QEvent::KeyRelease, key, Qt::NoModifier);
QCoreApplication::sendEvent(FOCUSOBJ, &pressEvent);
QCoreApplication::sendEvent(FOCUSOBJ, &releaseEvent);

which makes keyboard type into editlines etc.

sayan275

Hi,
got it done.

ui->lineEdit->setFocus();
QKeyEvent *key_press = new QKeyEvent(QKeyEvent::KeyPress, Qt::Key_X, Qt::NoModifier, "x");
QApplication::sendEvent(ui->lineEdit, key_pre..ss);

the last parameter "x"

Zonghan Gan

@sayan275 Dear Sayan I think you may know the answer to my problem. I'm struggling to send a self-defined event from main.cpp to the ui->boardView in mainwindow.cpp, as the ui->boardView is only defined in mainwindow.cpp. Yet the eventfilter can only be installed on the ui->boardView. It seems you've done similar sth similar. Could you please tell me how to realize such feature? (there are also detailed code about this which I put on stackoverflow https://stackoverflow.com/questions/60424216/how-to-use-eventfilter-under-child-widget-to-catch-self-define-event)