Problem with QTableWidget and Signals

[rmagro]

Hi all,

I have a QtableWidget defines as follows:

tableWidget = new QTableWidget(3, 4, this);
 
	for (int row_j=0; row_j < 3; ++row_j)
	{
		for (int column_i=0; column_i < 4; column_i++)
		{
			QTableWidgetItem *item = new QTableWidgetItem;
			item->setTextAlignment (Qt::AlignCenter);
			tableWidget->setItem(row_j, column_i, item);
		}
	}
 
	tableWidget->item(0, 0)->setCheckState ( Qt::Checked );  <------
	tableWidget->item(1, 0)->setCheckState ( Qt::Checked );  <------
	tableWidget->item(2, 0)->setCheckState ( Qt::Checked );  <------
 
	QGroupBox *frameQTable = new QGroupBox(tr(""));
 
	QVBoxLayout *TableLayout = new QVBoxLayout(frameQTable);
	TableLayout->addWidget (tableWidget);
 
	QVBoxLayout *layout = new QVBoxLayout;
	layout->addWidget(frameQTable);
    setLayout(layout);

tableWidget = new QTableWidget(3, 4, this);

	for (int row_j=0; row_j < 3; ++row_j)
	{
		for (int column_i=0; column_i < 4; column_i++)
		{
			QTableWidgetItem *item = new QTableWidgetItem;
			item->setTextAlignment (Qt::AlignCenter);
			tableWidget->setItem(row_j, column_i, item);
		}
	}

	tableWidget->item(0, 0)->setCheckState ( Qt::Checked );  <------
	tableWidget->item(1, 0)->setCheckState ( Qt::Checked );  <------
	tableWidget->item(2, 0)->setCheckState ( Qt::Checked );  <------

	QGroupBox *frameQTable = new QGroupBox(tr(""));

	QVBoxLayout *TableLayout = new QVBoxLayout(frameQTable);
	TableLayout->addWidget (tableWidget);

	QVBoxLayout *layout = new QVBoxLayout;
	layout->addWidget(frameQTable);
    setLayout(layout);

To copy to clipboard, switch view to plain text mode 

Using the code as the shows by the arrows above, I put into the first cell of each row a CheckBox..

The Question is :
is there a way to emit a signal when the I click on the CheckBox?

So far the only signal is working for me is itemSelectionChanged ():

connect(tableWidget, SIGNAL(itemSelectionChanged () ),
            this, SIGNAL(completeChanged()));

connect(tableWidget, SIGNAL(itemSelectionChanged () ),
            this, SIGNAL(completeChanged()));

To copy to clipboard, switch view to plain text mode 

that works indeed when I move to another item....
but not when I put the check..

Thank you for your kind reply..
Roberto

[caduel]

Try connecting to QTableWidget::cellChanged() and check the Qt::CheckStateRole of the item.

HTH

[rmagro]

Nothing happens whe I click on the checkbox...
Ho do I have to use the Qt::CheckStateRole

Here is the code I use:

what I am trying:
 
	connect(tableWidget, SIGNAL(cellChanged(0,0) ),
            this, SIGNAL(completeChanged()));
 
and then in the method called I have the code:
 
	if ( (tableWidget->item(1, 0)->checkState () != Qt::Checked) )
	{
		return false;
	}
	else
		return true;
 
but nothing..

what I am trying:

	connect(tableWidget, SIGNAL(cellChanged(0,0) ),
            this, SIGNAL(completeChanged()));
	
and then in the method called I have the code:

	if ( (tableWidget->item(1, 0)->checkState () != Qt::Checked) )
	{
		return false;
	}
	else
		return true;

but nothing..

To copy to clipboard, switch view to plain text mode 

Thx

[caduel]

You must not use values for the arguments of the slot in the connect call!
(You should get an error message printed for your code, by the way.)

Try like this

connect(tableWidget, SIGNAL(cellChanged(int,int) ),
            this, SIGNAL(completeChanged(int,int)));

connect(tableWidget, SIGNAL(cellChanged(int,int) ),
            this, SIGNAL(completeChanged(int,int)));

To copy to clipboard, switch view to plain text mode 

void completeChanged(int row, int col)
{
   QTableWidgetItem *item = tableWidget->item(row,col);
   if (item->checkState() == ...)
      ...
}

void completeChanged(int row, int col)
{
   QTableWidgetItem *item = tableWidget->item(row,col);
   if (item->checkState() == ...)
      ...
}

To copy to clipboard, switch view to plain text mode 

[rmagro]

BINGOOO!!!

It works Perfectly...as you suggested..

GREAT!

Many thanks..

Roberto