QTableWidget: cellChanged returning all cells?

[taraj]

Hi

I have the following code for a tableWidget. When I change a cell in the table and the cellChanged signal is called I get all cells in the table 'signalled' and I only want the one that was changed. I need to know the row and column that was changed which is why I am using cellChanged().

tableValueChanged outputs every row and column not just the changed one

What am I doing wrong?

Thanks in advance!

int row, col;  
 
  for(row = 0; row < tableWidget->rowCount(); row++)
  {
 
    for(col = 0; col < tableWidget->columnCount(); col++)
    {        
        connect(tableWidget, SIGNAL(cellChanged(int,int)), this, SLOT(tableValueChanged(int, int)));
    }
  }
 
void className::tableValueChanged(int row, int col)
{
    qDebug("value changed row = %d, col = %d", row, col);
}

int row, col;  

  for(row = 0; row < tableWidget->rowCount(); row++)
  {

    for(col = 0; col < tableWidget->columnCount(); col++)
    {        
        connect(tableWidget, SIGNAL(cellChanged(int,int)), this, SLOT(tableValueChanged(int, int)));
    }
  }

void className::tableValueChanged(int row, int col)
{
    qDebug("value changed row = %d, col = %d", row, col);
}

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[anda_skoa]

You only need to connect the signal once.

Cheers,
_

[taraj]

Thanks for the reply, I removed the 2 for loops so connect was only called once but still got the following for 3 rows and 11 columns??

value changed row = 0, col = 1
value changed row = 0, col = 2
value changed row = 0, col = 3
value changed row = 0, col = 4
value changed row = 0, col = 5
value changed row = 0, col = 6
value changed row = 0, col = 8
value changed row = 0, col = 10
value changed row = 0, col = 11
value changed row = 1, col = 1
value changed row = 1, col = 2
value changed row = 1, col = 3
value changed row = 1, col = 4
value changed row = 1, col = 5
value changed row = 1, col = 6
value changed row = 1, col = 8
value changed row = 1, col = 10
value changed row = 1, col = 11
value changed row = 2, col = 1
value changed row = 2, col = 2
value changed row = 2, col = 3
value changed row = 2, col = 4
value changed row = 2, col = 5
value changed row = 2, col = 6
value changed row = 2, col = 8
value changed row = 2, col = 10
value changed row = 2, col = 11

[ChrisW67]

The first observation is that there are no col == 0 calls, so it isn't every cell in the table.

This is precisely what you might see if you connect the signal and then populate the table. Where is the table populated?

[taraj]

I understand, works perfectly now thank you!