Bug 182000 Cross tab layout behavior
In the current approach of cross tab layout view, the arrow is associated with the first data item in the cell. - User cannot delete measure and level data items which have arrow with them. -Wenbin has concerns with the approach, as this will make the UI very restrictive. - Also user may want to delete data item and just show image in a cross tab cell. We had a discussion with Bang, and he has revised the mockups for the layout - The idea is that the arrow is associated with the cross tab cell and not data item. Let us know if there are any issues with supporting this.
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/editors/editparts/LevelCrosstabPopMenuProvider.java
* Gets the current selected object.
	 * 
	 * @return The current selected object array. If length is one, return the
	 *         first
	 */
	protected Object getSelectedElement( )
	{
		Object[] array = getElements( ).toArray( );
		if ( array.length == 1 )
		{
			return array[0];
		}
		return array;
	}
	/**
	 * Gets the first selected object.
	 * 
	 * @return The first selected object
	 */
	protected Object getFirstElement( )
	{
		Object[] array = getElements( ).toArray( );
		if ( array.length > 0 )
		{
			return array[0];
		}
		return null;
	}
}