QTableWidget itemDoubleClicked signal link to textEdit

Question

i have a populated tableWidget and i want to select the row header upon doubleClick and grab the text in the row header then populate a textEdit with it.

i have:

        connect(ui->tableWidget, SIGNAL(itemDoubleClicked(QTableWidget*)),ui->textEdit, SLOT(on_tableWidget_itemDoubleClicked(QTableWidgetItem*)));

void on_tableWidget_itemDoubleClicked(QTableWidgetItem *item)
{
    QString selectedName = item->text();
    ui->textEdit->setText(selectedName);
}

and not only is the focus not changing when i run the code buh nothing is happening to the textEdit... Am i missing something here?

Answer 1

The connection should be

connect(ui->tableWidget, SIGNAL(itemDoubleClicked(QTableWidget*)),
        this, SLOT(on_tableWidget_itemDoubleClicked(QTableWidgetItem*)));

provided that the slot is defined in your class.

Answer 2

With the slot name format ("on_widgetName_signalName") and because the tableWidget belongs to a generated ui, the connection should be done automatically by the line ui->setupUi(this); you have in your constructor.

So, you can remove the connect call, but you should check that on_tableWidget_itemDoubleClicked is declared as a slot, and that the macro Q_OBJECT was included in the class definition.