private void AddOffset()
        {
            frmOffset dialog = new frmOffset(frmOffset.Mode.Add);
            DialogResult r = dialog.ShowDialog();

            if (r == DialogResult.OK)
            {
                var settings = dialog.GetSettings();
                string[] offsetRow = { settings.Phase.ToString(), settings.Amplitude.ToString() };
                // Add the offset to the listview
                var offsetItem = new ListViewItem(offsetRow);
                this.lsvOffsets.Items.Add(offsetItem);
            }
        }