One more basic C++ question

Anonymous_Banned275

I am still unsure about C++ syntax . The attached "connect": code gives me errors. I need help with C++ syntax.

/media/f/QT/Qt/QT/qtconnectivity/examples/bluetooth/CAT_BT_18112020/device.cpp:125: error: **cannot call member function** 'void QListWidget::itemClicked(QListWidgetItem*)' **without object**
     &QListWidget::itemClicked(&item), // &item),
                                    ^

/media/f/QT/Qt/QT/qtconnectivity/examples/bluetooth/CAT_BT_18112020/device.cpp:127: error: cannot call member function 'void QListWidget::addItem(QListWidgetItem*)' without object
             &QListWidget::addItem(&item));
                                        ^

Please help me with understanding what I am doing wrong.
C++ code correction would be also welcome, hopefully with explanation of my error.

   connect(ui->list,
            &QListWidget::itemClicked(&item), ,
            ui->list_2,
            &QListWidget::addItem(&item));

Pl45m4

@AnneRanch

Using the new signal&slot syntax, you don't need to worry about any parameters. This is done automatically.

Remove the (&item) part on both sides (signal and slot) and it should be fine

jsulm

@AnneRanch

connect(ui->list,
            &QListWidget::itemClicked ,
            ui->list_2,
            &QListWidget::addItem);

https://doc.qt.io/qt-5/signalsandslots.html
If using overloaded signals see https://stackoverflow.com/questions/16794695/connecting-overloaded-signals-and-slots-in-qt-5