QListWidget* list = new QListWidget(); list->addItem("Item 1"); list->addItem("Item 2"); list->addItem("Item 3"); QListWidgetItem* firstItem = list->item(0); firstItem->setSelected(true);
connect(list, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(onListItemClicked(QListWidgetItem*))); void onListItemClicked(QListWidgetItem* item) { item->setSelected(true); }In this example, we connect the list's itemClicked signal to a custom slot called onListItemClicked. When the signal is emitted (i.e. when the user clicks on an item), the slot is called and setSelected is used to select the clicked item. Overall, the setSelected function is a useful tool for managing the selected state of items in a QListWidget. It is a part of the Qt library and is included in the QtCore package.