SIL.FieldWorks.IText.ConcordanceControl.UpdateButtonState C# (CSharp) Method

		private void UpdateButtonState()
		{
			ConcordLine sel = (ConcordLine)m_cbLine.SelectedItem;
			m_searchContentLabel.Text = ITextStrings.ConcordanceSearchTextLabel;
			switch (sel.Line)
			{
				case ConcordanceLines.kGramCategory:
				case ConcordanceLines.kWordCategory:
				case ConcordanceLines.kTags:
					m_cbSearchText.Enabled = true;
					m_cbSearchText.Visible = true;
					FillSearchComboList(sel.Line);
					m_tbSearchText.Visible = m_btnRegExp.Visible = false;
					DisableDetailedSearchControls();
					if (sel.Line != ConcordanceLines.kTags)
						m_searchContentLabel.Text = ITextStrings.ConcordanceSearchCatLabel;
					else
						m_searchContentLabel.Text = ITextStrings.ConcordanceSearchTagLabel;
					break;
				case ConcordanceLines.kBaseline:
					SyncWritingSystemComboToSelectedLine(sel);
					SetDefaultButtonState();
					// the Baseline currently tries to match in an entire paragraph.
					// so disable "at start" and "at end" and "whole item" matchers.
					if (!m_rbtnAnywhere.Checked && !m_rbtnUseRegExp.Checked)
						m_rbtnAnywhere.Checked = true;
					m_rbtnAtEnd.Enabled = false;
					m_rbtnAtStart.Enabled = false;
					m_rbtnWholeItem.Enabled = false;
					break;
				default:
					SyncWritingSystemComboToSelectedLine(sel);
					SetDefaultButtonState();
					break;
			}
		}