Bug 122177 Add input for IntervalBase to Group Editor
BIRT model's group definition has one important property: IntervalBase (see GroupHandle.setIntervalBase). This property controls how interval-based grouping picks the range of its initial group, and is an important part of range-based grouping. BIRT designer's Group Details editor should allow user to edit IntervalBase for a group. This is how the editor should work: * IntervalBase options should be presented only if "Interval" is not "None". (Since IntervalBase only makes sense for interval-based grouping) * IntervalBase should be presented in conjunction with checkbox. When it is unchecked (maps to a NULL IntervalBase value), Data Engine dynamically picks a base value using the first group key value in the result set. When it is checked, the user should input a base value. The following is a suggested look of the UI control: [ ] Use fixed base value for interval: _______________ ( [] is a checkbox, underline ___ is a textbox ).
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
int index = 0;
		for ( int i = 0; i < intervalChoices.length; i++ )
		{
			if ( intervalChoices[i].getName( ).equals( interval ) )
			{
				index = i;
				break;
			}
		}
		return index;
	}
	private DesignElementHandle createRow( ) throws SemanticException
	{
		
		
		DesignElementHandle handle = DesignElementFactory.getInstance( inputGroup.getModuleHandle( ) )
				.newTableRow( );
		TableHandle table = (TableHandle) inputGroup.getContainer( );
		for ( int i = 0; i < table.getColumnCount( ); i++ )
		{
			
			
			handle.addElement( DesignElementFactory.getInstance( inputGroup.getModuleHandle( ) )
					.newCell( ),
					RowHandle.CONTENT_SLOT );
		}
		return handle;
	}
	private void setKeyExpression( String key )
	{