C++ 以编程方式在 QTreeView 中选择一行
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Selecting a row in QTreeView programmatically
提问by the JinX
I have a QTreeView with QFileSystemModel as model.
我有一个 QTreeView 与 QFileSystemModel 作为模型。
The QTreeView has SelectionBehavior set to SelectRows.
QTreeView 将 SelectionBehavior 设置为 SelectRows。
In my code I read a dataset to select and then select them via:
在我的代码中，我读取了一个要选择的数据集，然后通过以下方式选择它们：
idx = treeview->model()->index(search);
selection->select(idx, QItemSelectionModel::Select);
This selects a cell, not the row . .
这将选择一个单元格，而不是行。.
Have added a stupid workaround, but would rather fix this the correct way.
添加了一个愚蠢的解决方法，但宁愿以正确的方式解决这个问题。
for (int col=0; col< treeview->model()->columnCount(); col++)
{
idx = treeview->model()->index(search, col);
selection->select(idx, QItemSelectionModel::Select);
}
Or is that ^^ the only way to do it?
或者这是 ^^ 唯一的方法吗？
采纳答案by Elmar de Koning
You can also select an entire row using an QItemSelection:
您还可以使用 QItemSelection 选择整行：
selection->select (
QItemSelection (
treeview->model ()->index (search, 0),
treeview->model ()->index (search, treeview->model ()->columnCount () - 1)),
QItemSelectionModel::Select);
Also if you also want row selection for user clicks you need to set the selection behavior:
此外，如果您还需要为用户点击选择行，则需要设置选择行为：
treeview->setSelectionBehavior (QAbstractItemView::SelectRows)
回答by alex
If you want to select a full row, you should use the following:
如果要选择整行，则应使用以下内容：
selection->select(idx, QItemSelectionModel::Select | QItemSelectionModel::Rows);
Note that you may sometimes first want to clear the selection:
请注意，有时您可能首先要清除选择：
selection->select(idx, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
