how to traverse all the items of QListWidget/QTreeWidget?

opengpu2

mcosta

Hi,

for a QListWidget you can do something like

// myWidget is a QListWidget*
for (int i = 0; myWidget->count(); ++i) {
    QListWidgetItem *item = myWidget->item(i);
    // Do something with item
}

for a QTreeWidget

// myWidget is a QTreeWidgetItem*
void traverseNode(QTreeWidgetItem *item) {
    // Do something with item
    for (int i = 0; i < item->childCount(); ++i)
        traverseNode(item->child(i));
}

for (int i = 0; i < myWidget->topLevelItemCount(); ++i) {
    QTreeWidgetItem *item = myWidget->topLevelItem(i);
    traverseNode(item);
}

For a tree usually you have to decide to process the item itself before or after its child.

opengpu2

@mcosta thank you
does this->findItems() faster?

koahnig

@opengpu2
It depends what your intend is. mcosta answered your initial question.
If you are searching something specific and you know the details anyhow findItems() is the better choices.

mcosta

As @koahnig said, findItems() find items by name.
If you want to traverse the List/Tree you cannot use it.