QTableWidget + setCellWidget(myWidget) how remove from Cell without delete myWidget ?

pdn_mail

Hi!
I insert single myWidget to QTableWidget by setCellWidget().
When I using removeCellWidget() function myWidget is removed for ever, but it still will be necessary to me repeatedly.
How correctly remove from Cell myWidget without delete myWidget?

Ratzz

@pdn_mail
Hi,
You may try http://doc.qt.io/qt-4.8/qtablewidget.html#takeItem

pdn_mail

it hardly, takeItem works with QTableWidgetItem, but not with QWidget. Different mechanisms.

raven-worx

@pdn_mail
There is no way - currently.
The index widget will be deleted whenever a new index widget is set.
removeCellWidget() simply sets a NULL-widget. So you have implicitly the same problem.

What exactly is your usecase?

An alternative would be to add a container widget. for example: QStackedWidget
And add the widgets there, so Qt doesn't delete them.

if( QStackedWidget* w = qobject_cast<QStackedWidget*>( tableWidget->cellWidget(r,c) )
{
     w->addWidget( ... )  // set widget
     w->removeWidget( ... );  //remove widget
     w->setCurrentIndex( ... ) / w->setCurrentWidget( ... );  //switch widgets
}

pdn_mail

Thanks. But unfortunately I have other usecase, I shouldn't replace widgets in a cell, I should return to a cell initial properties which were to setCellWidget.

void MainWindow::on_tableWidget_cellEntered(int row, int column)
{
QStackedWidget *sw=new QStackedWidget;
int r=cellwidgetcoord.row; 
int c=cellwidgetcoord.column;
cellwidgetcoord.row=row; 
cellwidgetcoord.column=column;
ui->tableWidget->removeCellWidget(r,c);
sw->addWidget(&comboBox_5);
ui->tableWidget->setCellWidget(row, column, sw);
}

raven-worx

@pdn_mail
maybe it's enough to simply hide it