private void CustomTreeView_Load(object sender, EventArgs e)
{
MultiSelectTreeNode2 nodeP = new MultiSelectTreeNode2("Node Group");
multiSelectTreeView1.Nodes.Add(nodeP);
MultiSelectTreeNode2 node = new MultiSelectTreeNode2("First Node");
node.Select();
nodeP.Nodes.Add(node);
node = new MultiSelectTreeNode2("Second Node");
nodeP.Nodes.Add(node);
node = new MultiSelectTreeNode2("Third Node");
nodeP.Nodes.Add(node);
node = new MultiSelectTreeNode2("Fourth Node");
nodeP.Nodes.Add(node);
node = new MultiSelectTreeNode2("Fifth Node");
nodeP.Nodes.Add(node);
node = new MultiSelectTreeNode2("Sixth Node");
nodeP.Nodes.Add(node);
node = new MultiSelectTreeNode2("Seventh Node");
nodeP.Nodes.Add(node);
multiSelectTreeView1.ExpandAll();
}
protected override void OnNodeMouseClick(TreeNodeMouseClickEventArgs e)
{
TreeNode nodeHit = base.HitTest(e.X, e.Y).Node;
if (nodeHit != null)
{
MultiSelectTreeNode2 multiNode = nodeHit as MultiSelectTreeNode2;
if (multiNode != null)
{
// Use advanced selection rules.
if ((Control.ModifierKeys & Keys.Control) == 0)
{
// Ctrl is not held down.
// Remove previous selection.
List <MultiSelectTreeNode2> nodesToDelete =
new List <MultiSelectTreeNode2>();
foreach (MultiSelectTreeNode2 node in selectedNodes)
{
if (node != multiNode)
{
nodesToDelete.Add(node);
}
}
foreach (MultiSelectTreeNode2 node in nodesToDelete)
{
node.UnSelect();
}
}
if (multiNode.IsSelected)
{
// Node is already selected.
// Toggle it off.
multiNode.UnSelect();
}
else
{
// Add new selection.
multiNode.Select();
}
}
}
}