c++编写qt时,如何实现全选treeview中的所有item,包括子item
时间: 2024-03-08 22:47:30 浏览: 93
bootstrap插件treeview实现全选父节点下所有子节点和反选功能
您可以使用以下代码来实现选中treeview中的所有item,包括子item:
```c++
void selectAll(QTreeView* treeView)
{
QModelIndex rootIndex = treeView->rootIndex();
int numRows = treeView->model()->rowCount(rootIndex);
for (int i = 0; i < numRows; ++i) {
QModelIndex index = treeView->model()->index(i, 0, rootIndex);
treeView->selectionModel()->select(index, QItemSelectionModel::Select);
selectAllChildren(treeView, index);
}
}
void selectAllChildren(QTreeView* treeView, QModelIndex parentIndex)
{
int numRows = treeView->model()->rowCount(parentIndex);
for (int i = 0; i < numRows; ++i) {
QModelIndex index = treeView->model()->index(i, 0, parentIndex);
treeView->selectionModel()->select(index, QItemSelectionModel::Select);
selectAllChildren(treeView, index);
}
}
```
其中`selectAll()`函数遍历treeview的所有根item,并选中它们,然后调用`selectAllChildren()`函数遍历每个根item的子item并选中它们。
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