How to select multiple items in a TTreeView in code - treeview

Question

I'm trying to select all the child node of a parent node when the parent is clicked, but when I for each node set the Selected = true i only end up with the last one being selected.
MultiSelect is true and I can do it with the mouse, so the setup should be ok.
For testing I use this code:
TTreeNode *node = Tv->Items->GetFirstNode();
node->Selected = true;
node = node->GetNext();
node->Selected = true;
node = node->GetNext();
node->Selected = true;
node = node->GetNext();
node->Selected = true;
Any tricks to make this work?

Answer 1

The TTreeNode::Selected property does not support multiple selections when toggling the node's selection state. Internally, it will call the Win32 TreeView_SelectItem() API, which selects a single node only.
For multi-select, use the TTreeView::Select() method instead:
The select method selects one or more tree nodes.
That being said, your example is attempting to select (potentially) every node in the TreeView, not just the child nodes of a parent node, as you claim.
Try this:
void AddNodeAndChildrenToList(TList *List, TTreeNode *Node)
{
List->Add(Node);
TTreeNode *child = Node->getFirstChild();
while (child)
{
AddNodeAndChildrenToList(List, child);
child = child->getNextSibling();
}
}
...
TList *nodes = new TList;
try
{
TTreeNode *parent = ...;
AddNodeAndChildrenToList(nodes, parent);
Tv->Select(nodes);
}
__finally
{
delete nodes;
}