Remove selected items from listWidget

Question

How to remove selected items from a QListWidget?

I have tried write the following code, but it does not work.

QList<QListWidgetItem*> items = ui->listWidget->selectedItems();
foreach(QListWidgetItem item, items){
    ui->listWidget->removeItemWidget(item);
}

Cobia

why item is not a pointer? – Eldred

@wuqiang: I've changed item to *item. but still doesn't want to remove the items or any item. – Cobia

Answer 1

One way to remove item from QListWidget is to use QListWidget::takeItem which removes and returns the item :

QList<QListWidgetItem*> items = ui->listWidget->selectedItems();
foreach(QListWidgetItem * item, items)
{
    delete ui->listWidget->takeItem(ui->listWidget->row(item));
}

Another way is to qDeleteAll :

qDeleteAll(ui->listWidget->selectedItems());

Epirogeny

Good answer. Please note that the example here for qDeleteAll is illustrative.... it deletes only the items selected in the UI. qDeleteAll(ui->listWidget->items()); clears all entries. In general, qDeleteAll(someListOfValidItems); does the job. – Cowardice

Thank you, but the first way occurs an error QModelIndex QListWidget::indexFromItem(QListWidgetItem*) const' is protected. – Cobia

@LionKing You are right. you should use QListWidget::row. The answer is updated. – Epirogeny

@Youda008 removeItemWidget only removes the widget set on the item. To remove an entire row you should use takeItem and also delete it to free memory. See: doc.qt.io/qt-5/qlistwidget.html#removeItemWidget – Epirogeny

@Nejat: That says manual. But i don't understand what removes the widget set on the item mean. What is widget set or what does it mean to set widget on the item ?? – Xylidine

@Xylidine removeItemWidget only removes the widget and the result is that an empty item without widget is left. – Epirogeny

@Xylidine To make removeItemWidget(item) work, you should add in the following line delete(item) – Cerebration

@Epirogeny - Your one-line answer (qDeleteAll(ui->listWidget->selectedItems());) is as relative today as it was when you gave it. Thank you. – Alethiaaletta

Answer 2

To give a solution with removeItemWidget:

QList<QListWidgetItem*> items = ui->listWidget->selectedItems();

foreach(QListWidgetItem* item, items){
    ui->listWidget->removeItemWidget(item);
    delete item; // Qt documentation warnings you to destroy item to effectively remove it from QListWidget.
}

Wieren