Question

您好我正在使用QTableView使用qsqltablemodel来显示来自sql表的数据：

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    model = new QSqlTableModel(this);
    model->setTable("staging");
    model->select();
    model->setHeaderData(0, Qt::Vertical, tr("ID"));
    model->setHeaderData(1, Qt::Vertical, tr("Region"));
    model->setHeaderData(2, Qt::Vertical, tr("T1"));
    model->setHeaderData(3, Qt::Vertical, tr("N1"));
    model->setHeaderData(4, Qt::Vertical, tr("M1"));

    ui->tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);
    ui->tableView->setModel(model);
    ui->tableView->showRow(1);
    ui->tableView->resizeColumnsToContents();

}

我只想在这样的视图中显示表，列以行和行的形式显示为列。我搜索了谷歌等..但找不到任何简单的解决方案。提到了一个代理模型，但我不确定如何使用QSqltablemodel来实现它，该QSqltablemodel在本例中不使用数据方法，而是一次使用model-＆gt; select（）语句来填充整个模型。任何指导将不胜感激。

Answer 1

class Horizontal_proxy_model : public QAbstractProxyModel {
public:
  Horizontal_proxy_model(QObject * parent = 0);
  QModelIndex mapToSource(const QModelIndex &proxyIndex) const;
  QModelIndex mapFromSource(const QModelIndex &sourceIndex) const;
  QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
  QModelIndex parent(const QModelIndex &child) const;
  int rowCount(const QModelIndex &parent) const;
  int columnCount(const QModelIndex &parent) const;
  QVariant headerData(int section, Qt::Orientation orientation, int role) const;
};

Horizontal_proxy_model::Horizontal_proxy_model(QObject *parent) : 
  QAbstractProxyModel(parent) {
}

QModelIndex Horizontal_proxy_model::mapToSource(const QModelIndex &proxyIndex) const {
  if (sourceModel()) {
    return sourceModel()->index(proxyIndex.column(), proxyIndex.row());
  } else {
    return QModelIndex();
  }
}

QModelIndex Horizontal_proxy_model::mapFromSource(const QModelIndex &sourceIndex) const {
  return index(sourceIndex.column(), sourceIndex.row());
}

QModelIndex Horizontal_proxy_model::index(int row, int column, const QModelIndex &) const {
  return createIndex(row, column, (void*) 0);
}

QModelIndex Horizontal_proxy_model::parent(const QModelIndex &) const {
  return QModelIndex();
}

int Horizontal_proxy_model::rowCount(const QModelIndex &) const {
  return sourceModel() ? sourceModel()->columnCount() : 0;
}

int Horizontal_proxy_model::columnCount(const QModelIndex &) const {
  return sourceModel() ? sourceModel()->rowCount() : 0;
}

QVariant Horizontal_proxy_model::headerData(
           int section, Qt::Orientation orientation, int role) const {
  if (!sourceModel()) { return QVariant(); }
  Qt::Orientation new_orientation = orientation == Qt::Horizontal ? 
      Qt::Vertical : Qt::Horizontal;
  return sourceModel()->headerData(section, new_orientation, role);
}

用法：

Horizontal_proxy_model* proxy_model = new Horizontal_proxy_model();
proxy_model->setSourceModel(model);
ui->tableView->setModel(proxy_model);

Answer 2

已针对PyQt5更新

from PyQt5.QtCore import Qt, QAbstractProxyModel, QModelIndex, QSortFilterProxyModel

class HorizontalProxyModel(QAbstractProxyModel):
    """Rotates model 90 degrees"""

    def __init__(self, src, parent=None):
        super(HorizontalProxyModel, self).__init__(parent)
        self.setSourceModel(src)

    def mapToSource(self, proxyIndex: QModelIndex) -> QModelIndex:
        if self.sourceModel():
            return self.sourceModel().index(proxyIndex.column(), proxyIndex.row())
        else:
            return QModelIndex()

    def mapFromSource(self, sourceIndex: QModelIndex) -> QModelIndex:
        return self.index(sourceIndex.column(), sourceIndex.row())

    def index(self, row: int, column: int, parent: QModelIndex = ...) -> QModelIndex:
        return self.createIndex(row, column)

    def parent(self, child: QModelIndex) -> QModelIndex:
        return QModelIndex()

    def rowCount(self, parent: QModelIndex = ...) -> int:
        return self.sourceModel().columnCount() if self.sourceModel() else 0

    def columnCount(self, parent: QModelIndex = ...) -> int:
        return self.sourceModel().rowCount() if self.sourceModel() else 0

    def headerData(self, section: int, orientation: Qt.Orientation, role: int = ...) -> typing.Any:
        if not self.sourceModel():
            return None
        new_orientation = Qt.Vertical if orientation == Qt.Horizontal else Qt.Horizontal
        return self.sourceModel().headerData(section, new_orientation, role)

如何更改Qt TableView的方向

2 个答案: