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Yes, in C++ Qt, you can enable multiple selections in a QTreeView using Ctrl for multi-click selection. This is handled by setting the selectionMode property of the tree view to QAbstractItemView::MultiSelection, which allows multiple nodes to be selected using the Ctrl key.

Here’s how you can enable multiple node selection in a QTreeView with Ctrl key support:

Solution:

cpp

// Assuming you have a QTreeView object named treeView
ui->treeView_Tooling->setSelectionMode(QAbstractItemView::MultiSelection);

Explanation:

• QAbstractItemView::MultiSelection: This enables multi-selection mode, allowing the user to select multiple items by holding the Ctrl key (or Shift key for range selection).

This setting works out of the box with QTreeView and should let you select multiple nodes by holding the Ctrl key and clicking on different items.

Let me know if you need further clarification or assistance!


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To achieve multiple node selection and then return the names of the selected nodes in a QTreeView, you can use QTreeView's selection model to get the selected items. Then, you can iterate through those selected items and retrieve their names (or any other data) based on the model associated with the QTreeView.

Here’s a step-by-step guide on how you can implement this:

Step-by-step code:

cpp

// Assuming you have a QTreeView object named treeView
// and the model is a QStandardItemModel or similar.QItemSelectionModel *selectionModel = ui->treeView_Tooling->selectionModel();// Get the selected indexes (which represent the selected nodes)
QModelIndexList selectedIndexes = selectionModel->selectedIndexes();// Loop through the selected indexes and retrieve the names (or data)
QStringList selectedNodeNames;
for (const QModelIndex &index : selectedIndexes) {// Get the node name from the model (assuming it's in the first column)QString nodeName = index.model()->data(index).toString();  // You can adjust the column number if needed.// Add the node name to the listselectedNodeNames.append(nodeName);
}// Now you have all selected node names in selectedNodeNames.
for (const QString &name : selectedNodeNames) {qDebug() << name;  // Print or process the names
}

cpp

Explanation:

1. selectionModel->selectedIndexes(): This retrieves all selected items in the QTreeView. Each item is represented by a QModelIndex, which you can use to access the data in the model.

2. index.model()->data(index): This retrieves the data at the given index. By default, this returns the data of the first column of the model, which should be the node name. You can adjust the column number if needed (e.g., index.model()->data(index, columnNumber)).

3. selectedNodeNames.append(nodeName): Adds the node name to a list of selected names.

4. qDebug(): This is used to print the selected node names to the debug output, but you can process the names as needed (e.g., show them in a dialog, store them, etc.).

Note:

If your tree model has more columns or you need specific data from different columns, you can adjust the index model to get data from other columns.

Let me know if you need further clarification or adjustments!