private void OnDragDrop(object sender, DragEventArgs e)
{
if (connection != null)
{
RemoveConnection();
}
Form form = FindForm();
connection = (OutLabel)e.Data.GetData(typeof(OutLabel));
connection.AddConnection(this);
DragDot dh = connection.DragHandle;
this.line = new ConnectionLine();
this.line.End = form.PointToClient(PointToScreen(DragHandle.Center));
this.line.Start = form.PointToClient(connection.PointToScreen(dh.Center));
form.Controls.Add(line);
form.Invalidate();
}
protected void OnMouseClick(object sender, MouseEventArgs e)
{
dragLine = new ConnectionLine();
dragLine.Start = FindForm().PointToClient(PointToScreen(DragHandle.Center));
dragLine.End = PointToClient(e.Location);
FindForm().Controls.Add(dragLine);
dragLine.Invalidate();
DragDropEffects effect = dragDot.DoDragDrop(this, DragDropEffects.Link);
FindForm().Controls.Remove(dragLine);
dragLine = null;
DragHandle.Glowing = false;
}