[solved] Trying to add buttons, check boxes, etc. to a QTableWidget and get clicked signals using signalMapper

BasicPoke

QHello, I am trying to add buttons, check boxes, and the like, to a QTableWidget. When these controls are clicked, I want to get a signal and be able to tell which column of the table was clicked. I can't seem to get the clicked () signal to run.

I am using the following for reference:
http://qt-project.org/faq/answer/use_of_setcellwidget_in_qtablewidget_and_signal_connections
http://qt-project.org/doc/qt-5/QSignalMapper.html

Here is my code:

@class ButtonWidget : public QWidget
{
Q_OBJECT
public:
ButtonWidget( QWidget *parent=0 );

signals:
void clicked( const int index );

private:
Ui::GaugeMon *ui;
QSignalMapper *signalMapper;
};

ButtonWidget::ButtonWidget( QWidget *parent ) : QWidget(parent)
{
signalMapper = new QSignalMapper(this);
for( int i=0; i<8; i++ )
{
QPushButton browseButton = new QPushButton("...", parent);
connect( browseButton, SIGNAL(clicked()), signalMapper, SLOT(map()));
signalMapper->setMapping( browseButton, i );
((QTableWidget)parent)->setCellWidget(1, i, browseButton);
}
connect(signalMapper, SIGNAL(mapped(int)), this, SIGNAL(clicked(int)));
}

void ButtonWidget::clicked( const int index )
{
QMessageBox::critical(this, QString::number(index), "");
}
@

The ButtonWidget::clicked signal does not run when I click the buttons. What am I missing here? I tried using the following line instead:
@connect( browseButton, SIGNAL(clicked(const int)), signalMapper, SLOT(map()));@
but then I get a message in the App Output, "QObject::connect: No such signal QPushButton::clicked(const int)..."

Thanks
Ron

BasicPoke

In my QMainWindow constructor:

@ButtonWidget b(ui->tableWidget); //Draw buttons on grid and make click connections.
@

SGaist

Hi,

Signals don't have implementation, only slots, so you just need to change that and update the connection call and you should be good to go

BasicPoke

I finally got this working using a slightly different method. My slot btnOutClickSlot(int btn) now runs when I click a button and btn contains the index of the button. I'm happy. :)

@QSignalMapper *btnGroup;
btnGroup = new QSignalMapper(this);
connect(btnGroup, SIGNAL(mapped(int)), this, SLOT(btnOutClickSlot(int)));

//Add buttons to table
for( int i=0; i<8; i++ )
{
QPushButton *pb = new QPushButton("...", ui->tableWidget);
btnGroup->setMapping( pb, i );
connect( pb, SIGNAL(clicked()), btnGroup, SLOT(map()));
ui->tableWidget->setCellWidget(1, i, pb);
}

void GaugeMon::btnOutClickSlot(int btn)
{
QMessageBox::critical(this, QString::number(btn), tr(""));
}@