How to delete all rows from QTableWidget

Question

I am trying to delete all rows from a QTableWidget . Here is what I tried.

for ( int i = 0; i < mTestTable->rowCount(); ++i )
{
    mTestTable->removeRo         


        

Answer 1

AFAIK setRowCount(0) removes nothing. Objects are still there, but no more visible.

yourtable->model()->removeRows(0, yourtable->rowCount());

Answer 2

Look this post : http://forum.qt.io/topic/1715/qtablewidget-how-to-delete-a-row

QList<QTableWidgetItem*> items = table.findItems(.....);
QMap<int, int> rowsMap;
for(int i = 0; i < items.count(); i++{
  rowsMap[items.at(i).row()] = -1; //garbage value
}
QList<int> rowsList = rowsMap.uniqueKeys();
qSort(rowsList);

//Now go through your table and delete rows in descending order as content would shift up and hence cannot do it in ascending order with ease.
for(int i = rowList.count() - 1; i >= 0; i--){
  table.removeRow(rowList.at(i));
}

Answer 3

I don't know QTableWidget but your code seems to have a logic flaw. You are forgetting that as you go round the loop you are decreasing the value of mTestTable->rowCount(). After you have removed one row, i will be one and mTestTable->rowCount() will also be one, so your loop stops.

I would do it like this

while (mTestTable->rowCount() > 0)
{
    mTestTable->removeRow(0);
}

Answer 4

You can just add empty item model (QStandardItemModel) to your QTableView (myTableView):

itemModel = new QStandardItemModel;
ui->myTableView->setModel(itemModel);