Qtablewidget Throwing Segmentation Fault

[tan3587]

I am using QtableWidget to populate data collected from ROS messages:

ui->stat->setColumnCount(3);
ui->stat->setRowCount(5);
count_row=0;// keep track of table rows
ui->stat->setColumnWidth(0,145);
ui->stat->setColumnWidth(1,50);
ui->stat->setColumnWidth(2,300);
QStringlist labels; labels.push_back(" Time");
labels.push_back("Type"); labels.push_back("Message ");
ui->stat->setHorizontalHeaderLabels(labels);
QTableWidgetItem* text = new QTableWidgetItem();
QTableWidgetItem* msgType = new QTableWidgetItem();
QTableWidgetItem* time = new QTableWidgetItem();
count_row=count_row%5;
ui->stat->setItem(count_row,0,time);
ui->stat->setItem(count_row,1,msgType); ui->st
at->setItem(count_row,2,text);
count_row++;
for(int i=4;i>=0;i--)
ui->stat->showRow(i);

On running the program, I am getting segmentation fault error. Please help!!

[p3c0]

Hi,

1. Do you want to display any text in QTableWidget ? As i can see you have not added any text to your QTableWidgetItem.

2. You are adding 3 items in 1st row's 3 columns and you are iterating the whole QTableWidget. And here no need to do showRow as the items will be displayed by default when you set text to it.

3. I modified your code as follows and i see no crashes:
   @ui->stat->setColumnCount(3);
   ui->stat->setRowCount(5);
   int count_row=0;// keep track of table rows

   ui->stat->setColumnWidth(0,145);
   ui->stat->setColumnWidth(1,50);
   ui->stat->setColumnWidth(2,300);

   QStringList labels;
   labels.push_back("Time");
   labels.push_back("Type");
   labels.push_back("Message");

   ui->stat->setHorizontalHeaderLabels(labels);

   QTableWidgetItem* text = new QTableWidgetItem();
   text->setText("Sometext");
   QTableWidgetItem* msgType = new QTableWidgetItem();
   msgType->setText("SomeMessage");
   QTableWidgetItem* time = new QTableWidgetItem();
   time->setText("SomeTime");

   count_row=count_row%5;
   qDebug() << count_row;
   ui->stat->setItem(count_row,0,time);
   ui->stat->setItem(count_row,1,msgType);
   ui->stat->setItem(count_row,2,text);
   count_row++;

   for(int i=4;i>=0;i--)
   ui->stat->showRow(i);@

4. Please include your code in Code tags as it is difficult to understand to others.