QAbstractTableModel点击删除
时间: 2024-01-15 14:04:37 浏览: 27
您可以通过重载QAbstractTableModel类的removeRows()函数来实现删除选定行的功能。该函数接收两个参数:要删除的第一行的索引和要删除的行数。这个函数应该返回true如果删除操作成功,否则返回false。
下面是一个示例代码:
```cpp
bool MyTableModel::removeRows(int row, int count, const QModelIndex &parent)
{
beginRemoveRows(parent, row, row + count - 1);
for (int i = 0; i < count; i++)
{
m_data.removeAt(row);
}
endRemoveRows();
return true;
}
```
在上面的代码中,m_data是一个包含所有数据的数据结构。在beginRemoveRows()和endRemoveRows()之间,我们使用removeAt()函数从m_data中删除指定的行。这将自动更新表格视图中的行数和数据。
相关问题
QAbstractTableModel点击第二行获取第二行数据
您可以通过重载QAbstractTableModel类的data()函数,在特定情况下返回您需要的数据。在这种情况下,您可以检查行索引是否等于1(第二行),如果是,则返回相应的数据。示例代码如下:
```cpp
QVariant MyTableModel::data(const QModelIndex &index, int role) const
{
if (role == Qt::DisplayRole)
{
if (index.row() == 1)
{
if (index.column() == 0)
return m_data[index.row()].column1Data;
else if (index.column() == 1)
return m_data[index.row()].column2Data;
else if (index.column() == 2)
return m_data[index.row()].column3Data;
}
}
return QVariant();
}
```
在上面的代码中,我们检查了行索引是否等于1(第二行),如果是,则根据所需的列索引返回相应的数据。这样,当用户选择第二行时,将只显示第二行的数据。
qabstracttablemodel
QAbstractTableModel is an abstract base class that provides a framework for implementing table models in Qt. It provides methods for accessing and manipulating data in a table, as well as signals for notifying views of changes to the data.
Subclasses of QAbstractTableModel are responsible for implementing the following methods:
- rowCount(): Returns the number of rows in the model
- columnCount(): Returns the number of columns in the model
- data(): Returns the data at a given index in the model
- setData(): Sets the data at a given index in the model
- headerData(): Returns the header data for a given row or column
- flags(): Returns the item flags for a given index in the model
In addition to these methods, QAbstractTableModel provides signals for notifying views of changes to the data, including dataChanged(), headerDataChanged(), rowsInserted(), and rowsRemoved().
QAbstractTableModel is often used in conjunction with QTableView to provide a customizable table view for displaying and editing data.