NodeExpandablePanel node control

// create the node control.
NodeExpandablePanel name = new NodeExpandablePanel();
name.AttachTo(tree);
 
// add a node with the title and custom drawing area.
NodeWithDescription node = new NodeWithDescription();
node.Text = "John Smith";
node.AttachTo(tree);
 
// prepare treeview to auto–expanding.
tree.Options.Node.AutoNodeHeight = true;
tree.Options.Selection.HoverStyle = eHoverStyle.SoftSelect;
 
// attach an event handlers to paint the expanded area.
tree.MeasureNodeControlCustomArea += tree_MeasureNodeControlCustomArea;
tree.PaintNodeControlCustomArea += tree_PaintNodeControlCustomArea;
 
// measure our node control`s size.
void tree_MeasureNodeControlCustomArea(FlexibleTreeView pTreeview, MeasureObjectEventArgs pArgs)
{
  pArgs.Size = new Size(20, 20);
}
 
// draw our node control.
private void tree_PaintNodeControlCustomArea(FlexibleTreeView pTreeview, NodeControlDrawEventArgs pArgs)
{
  Rectangle bounds;
 
  //draw the 20x20 red rectangle.
  bounds = pArgs.Context.Bounds;
  bounds.Size = new Size(20, 20);
  using (Brush br = new SolidBrush(Color.Red))
  {
    pArgs.Context.Graphics.FillRectangle(br, bounds);
  }
}