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
public ExpressionBuilder( )
	{
		this( null );
	}
	protected Control createDialogArea( Composite parent )
	{
		Composite composite = (Composite) super.createDialogArea( parent );
		createToolbar( composite );
		createExpressionField( composite );
		if ( provider == null )
		{
			provider = new ExpressionProvider( );
		}
		createOperatorsBar( composite );
		createListArea( composite );
		return composite;
	}
	private void createToolbar( Composite parent )
	{
		ToolBar toolBar = new ToolBar( parent, SWT.FLAT );
		toolBar.setLayoutData( new GridData( ) );
		ToolItem copy = new ToolItem( toolBar, SWT.NONE );
		copy.setImage( ReportPlatformUIImages
				.getImage( ISharedImages.IMG_TOOL_COPY ) );
		copy.setToolTipText( TOOL_TIP_TEXT_COPY );
		copy.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				sourceViewer.doOperation( ITextOperationTarget.COPY );
			}