ATMLCommonLibrary.controls.awb.AWBDropListView.btnDown_Click C# (CSharp) Method

        private void btnDown_Click( object sender, EventArgs e )
        {
            var pt = new Point( 0, panel1.Height );
            if (_treeForm == null)
            {
                _treeForm = new DropListTreeForm();
                _treeForm.TreeModel = _treeModel;
                _treeForm.Location = PointToScreen( pt );
                _treeForm.Width = edtSelectedValue.Width + btnDown.Width;
                _treeForm.SignalSelect += _treeForm_SignalSelect;
                _treeForm.TreeLostFocus += _treeForm_TreeLostFocus;
                if (!string.IsNullOrEmpty( edtSelectedValue.Text ))
                    _treeForm.FindElement( (XmlElement) edtSelectedValue.Tag );
                _treeForm.Show();
            }
            else
            {
                CloseTree();
            }
        }