默認情況下,樹部件根據文本對項目進行排序,但您可以通過覆蓋QTreeWidgetItem
的運算符<()來更改它。下面是自定義的QTreeWidgetItem
與特定運營商的例子(見註釋):
class TreeWidgetItem : public QTreeWidgetItem
{
public:
// The constructors. Add more, if needed.
TreeWidgetItem(QTreeWidget *parent, const QStringList &strings,
int type = Type)
: QTreeWidgetItem(parent, strings, type)
{}
TreeWidgetItem(QTreeWidgetItem *parent, const QStringList &strings,
int type = Type)
: QTreeWidgetItem(parent, strings, type)
{}
// Compares two tree widget items. The logic can be changed.
bool operator<(const QTreeWidgetItem& other) const
{
// Get the price - the first child node
int price1 = 0;
if (childCount() > 0)
{
QTreeWidgetItem *firstChild = child(0);
price1 = firstChild->text(0).toInt();
}
// Get the second price - the first child node
int price2 = 0;
if (other.childCount() > 0)
{
QTreeWidgetItem *firstChild = other.child(0);
price2 = firstChild->text(0).toInt();
}
// Compare two prices.
return price1 < price2;
}
};
這裏是如何類可以用QTreeWidget
使用:
// The sortable tree widget.
QTreeWidget tw;
tw.setSortingEnabled(true);
QTreeWidgetItem *item1 = new TreeWidgetItem(&tw, QStringList() << "Item1");
QTreeWidgetItem *child1 = new TreeWidgetItem(item1, QStringList() << "10");
QTreeWidgetItem *item2 = new TreeWidgetItem(&tw, QStringList() << "Item2");
QTreeWidgetItem *child2 = new TreeWidgetItem(item2, QStringList() << "11");
tw.show();