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/CrosstabCellAdapter.java
* 
	 * @param rowNumber
	 */
	public void setRowNumber( int rowNumber )
	{
		this.rowNumber = rowNumber;
	}
	/**
	 * Gets the row span
	 * 
	 * @return
	 */
	public int getRowSpan( )
	{
		return rowSpan;
	}
	/**
	 * Sets the row span
	 * 
	 * @param rowSpan
	 */
	public void setRowSpan( int rowSpan )
	{
		this.rowSpan = rowSpan;
	}
	/**
	 * Gets the crosstab cell handle
	 * 
	 * @return
	 */