Customize sorting of QTreeWidget

http://stackoverflow.com/questions/788080/automatically-sorting-on-insert-in-qtreewidget

http://www.qtforum.org/article/25281/customize-sorting-of-qtreewidget.html#post89343

http://www.qtcentre.org/threads/11045-QTreeWidget-(Row-Check-Custom-Sort)

bool operator< (const QTreeWidgetItem &other) const; //custom sortbool QAppTreeItem::operator<(const QTreeWidgetItem &other) const{const QAppTreeWidget* Parent = dynamic_cast<const QAppTreeWidget*>(treeWidget());const QAppTreeItem* Right = dynamic_cast<const QAppTreeItem*>(&other);if ( Parent ){switch(Parent->sortColumn()){case QAppTreeWidget::COLUMN_IP_ADDRESS:return (IPAddr.toIPv4Address() < Right->IPAddr.toIPv4Address());break;}}return QTreeWidgetItem::operator<(other);}

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