我有一个QStandardItemModel类型的模型,如下所示:
QHash<int, QByteArray> roleNames;
roleNames[Car2goVehicle::NameRole] = "plate_number";
roleNames[Car2goVehicle::DescriptionRole] = "address";
roleNames[Car2goVehicle::FuelRole] = "fuel";
roleNames[Car2goVehicle::InteriorRole] = "interior";
roleNames[Car2goVehicle::ExteriorRole] = "exterior";
roleNames[Car2goVehicle::VinRole] = "vin";
roleNames[Car2goVehicle::LatRole] = "lat";
roleNames[Car2goVehicle::LonRole] = "lon";
roleNames[Car2goVehicle::DistanceRole] = "distance";
d->m_vehiclesmodel = new RoleItemModel(roleNames);
现在我想按照这样的距离进行排序
d->m_vehiclesmodel->setSortRole(Qt::UserRole);
d->m_vehiclesmodel->sort(Car2goVehicle::DistanceRole, Qt::AscendingOrder);
但结果是错误的。有人可以告诉我如何排序吗?
感谢。
答案 0 :(得分:6)
结果出了什么问题? 在大多数情况下,一个不使用QSortFilterProxyModel对模型本身进行排序,而是对视图进行排序。以下是文档中的示例:
QTreeView *treeView = new QTreeView;
MyItemModel *sourceModel = new MyItemModel(this);
QSortFilterProxyModel *proxyModel = new QSortFilterProxyModel(this);
proxyModel->setSourceModel(sourceModel);
treeView->setModel(proxyModel);
在上面的示例中,您可能会混淆角色和列。您的角色枚举应如下所示:
enum Role {
NameRole=Qt::UserRole,
DistanceRole,
...
};
如果您想按距离角色排序,请致电:
model->setSortRole( Car2goVehicle::DistanceRole );
然后,按一些列(与角色无关)排序,例如。第0栏:
model->sort( 0, Qt::AscendingOrder );
答案 1 :(得分:0)
如果QSortFilterProxyModel
足够强大,我建议不要使用QStandardItemModel::sort()
。相反,我坚持使用基本的Qt信号。
在这里,我使用PyQt,但代码也适用于C ++:
self.model = QStandardItemModel()
self.populate_model()
self.model.setHorizontalHeaderLabels(map(str, range(self.model.rowCount())))
self.treeview.setModel(self.model)
self.treeview.header().setSectionsClickable(True)
self.treeview.header().setSortIndicatorShown(True)
self.treeview.header().sortIndicatorChanged.connect(self.model.sort)
请注意将QHeaderView::sortIndicatorChanged
与QStandardItemModel::sort
相关联的最后一行。