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/model/CrosstabHandleAdapter.java
}
			else if ( part1.getColumnNumber( ) > part2.getColumnNumber( ) )
			{
				return 1;
			}
			else if ( part1.getColumnNumber( ) > part2.getColumnNumber( ) )
			{
				return -1;
			}
			return 0;
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#hashCode()
	 */
	public int hashCode( )
	{
		return getCrosstabItemHandle( ).hashCode( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.Object#equals(java.lang.Object)
	 */
	public boolean equals( Object obj )
	{
		if ( obj == getCrosstabItemHandle( ) )
		{