Bug 122869 Drag a parameter from data explorer view into a table in library, a new parameter is created automatically.
Description:Drag a parameter from data explorer view into a table in library, a new parameter is created automatically. Steps to reproduce: 1. Add a cascading parameter and a table in a library file. 2. Drag a parameter from data explorer view into a table cell in layout editor. 3. Find that a new parameter was added in data explorer view automatically.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ExpressionBuilder.java
{
				button.setData( operators[i] );
				String text = operators[i];
				if ( text.indexOf( "&" ) != -1 ) 
				{
					text = text.replaceAll( "&", "&&" ); 
				}
				button.setText( text );
				button.addSelectionListener( selectionAdapter );
			}
			else
			{
				button.setVisible( false );
			}
		}
	}
	private void createListArea( Composite parent )
	{
		Composite listArea = new Composite( parent, SWT.NONE );
		listArea.setLayout( new GridLayout( 3, true ) );
		listArea.setLayoutData( new GridData( GridData.FILL_BOTH ) );
		new Label( listArea, SWT.NONE ).setText( LABEL_CATEGORY );
		new Label( listArea, SWT.NONE ).setText( LABEL_SUB_CATEGORY );
		new Label( listArea, SWT.NONE ).setText( LABEL_FUNCTIONS );
		int style = SWT.BORDER | SWT.FULL_SELECTION | SWT.SINGLE;
		categoryTable = new TableViewer( listArea, style );
		subCategoryTable = new TableViewer( listArea, style );
		functionTable = new TableViewer( listArea, style );
		initTable( categoryTable );
		initTable( subCategoryTable );