public void RemoveConnection()
{
if (connection != null)
{
connection.RemoveConnection(this);
connection = null;
FindForm().Controls.Remove(line);
}
}
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();
}
