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
initTable( functionTable );
	}
	private void initTable( TableViewer tableViewer )
	{
		final Table table = tableViewer.getTable( );
		GridData gd = new GridData( GridData.FILL_BOTH );
		gd.heightHint = 150;
		table.setLayoutData( gd );
		table.setToolTipText( null );
		new TableColumn( table, SWT.NONE ).setWidth( 200 );
		table.addMouseTrackListener( new MouseTrackAdapter( ) {
			public void mouseHover( MouseEvent event )
			{
				Widget widget = event.widget;
				if ( widget == table )
				{
					Point pt = new Point( event.x, event.y );
					TableItem item = table.getItem( pt );
					if ( item == null )
					{
						table.setToolTipText( null );
					}
					else
					{
						table.setToolTipText( provider.getTooltipText( item
								.getData( ) ) );
					}
				}
			}
		} );