Drop on QTableView creates new columns

torkelh

I have two QTableViews in a dialog. One table view contains "available items", and the other contains "selected items". Both QTableViews have three columns, and each table view is connected to its own QStandardItemModel.

Dropping a row from "available items" to "selected items" works fine, as long as I drop the row at the first column. But if I drop the row at the second or third column (between two rows that has already been selected by drag & drop), new columns are created. The text is inserted from the second or third column onwards.

Is it possible to prevent this from happening? A row that is dropped on "selected items" shall always be inserted from the first column.

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Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);

QStandardItemModel* availableModel_ = new QStandardItemModel();
availableModel_->setHorizontalHeaderItem(0, new QStandardItem("First"));
availableModel_->setHorizontalHeaderItem(1, new QStandardItem("Second"));
availableModel_->setHorizontalHeaderItem(2, new QStandardItem("Third"));

ui->tvAvailable->setModel(availableModel_);
ui->tvAvailable->setSelectionBehavior(QAbstractItemView::SelectRows);
ui->tvAvailable->setSelectionMode(QAbstractItemView::ExtendedSelection);
ui->tvAvailable->verticalHeader()->setVisible(false);
ui->tvAvailable->setEditTriggers(QAbstractItemView::NoEditTriggers);

ui->tvAvailable->setDragEnabled(true);
ui->tvAvailable->setDragDropOverwriteMode(false);
ui->tvAvailable->setDefaultDropAction(Qt::MoveAction);

QStandardItemModel* selectedModel_ = new QStandardItemModel();
selectedModel_->setHorizontalHeaderItem(0, new QStandardItem("First"));
selectedModel_->setHorizontalHeaderItem(1, new QStandardItem("Second"));
selectedModel_->setHorizontalHeaderItem(2, new QStandardItem("Third"));

ui->tvSelected->setModel(selectedModel_);
ui->tvSelected->setSelectionBehavior(QAbstractItemView::SelectRows);
ui->tvSelected->setSelectionMode(QAbstractItemView::NoSelection);
ui->tvSelected->verticalHeader()->setVisible(false);
ui->tvSelected->setEditTriggers(QAbstractItemView::NoEditTriggers);

ui->tvSelected->setAcceptDrops(true);
ui->tvSelected->setDropIndicatorShown(true);

int row = 0;
int col = 0;
availableModel_->insertRows(0, 4);
availableModel_->setData(availableModel_->index(row, col), QString("Row 1"));
availableModel_->item(row,col++)->setDropEnabled(false);
availableModel_->setData(availableModel_->index(row, col), QString("The first row"));
availableModel_->item(row,col++)->setDropEnabled(false);
availableModel_->setData(availableModel_->index(row, col), 1);
availableModel_->item(row,col++)->setDropEnabled(false);

row++;
col = 0;
availableModel_->setData(availableModel_->index(row, col), QString("Row 2"));
availableModel_->item(row,col++)->setDropEnabled(false);
availableModel_->setData(availableModel_->index(row, col), QString("The second row"));
availableModel_->item(row,col++)->setDropEnabled(false);
availableModel_->setData(availableModel_->index(row, col), 2);
availableModel_->item(row,col++)->setDropEnabled(false);

row++;
col = 0;
availableModel_->setData(availableModel_->index(row, col), QString("Row 3"));
availableModel_->item(row,col++)->setDropEnabled(false);
availableModel_->setData(availableModel_->index(row, col), QString("The third row"));
availableModel_->item(row,col++)->setDropEnabled(false);
availableModel_->setData(availableModel_->index(row, col), 3);
availableModel_->item(row,col++)->setDropEnabled(false);

row++;
col = 0;
availableModel_->setData(availableModel_->index(row, col), QString("Row 4"));
availableModel_->item(row,col++)->setDropEnabled(false);
availableModel_->setData(availableModel_->index(row, col), QString("The fourth row"));
availableModel_->item(row,col++)->setDropEnabled(false);
availableModel_->setData(availableModel_->index(row, col), 4);
availableModel_->item(row,col++)->setDropEnabled(false);

}
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