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
keyChooser.deselectAll( );
		if ( StringUtil.isBlank( key ) )
		{
			keyChooser.setText( "" );
			return;
		}
		for ( int i = 0; i < columnList.size( ); i++ )
		{
			if ( key.equals( DEUtil.getExpression( columnList.get( i ) ) ) )
			{
				keyChooser.select( i );
				return;
			}
		}
		keyChooser.setText( key );
	}
	private String getKeyExpression( )
	{
		String exp = null;
		if ( keyChooser.getSelectionIndex( ) != -1 )
		{
			exp = DEUtil.getExpression( columnList.get( keyChooser.getSelectionIndex( ) ) );
		}
		else
		{
			exp = keyChooser.getText( );
		}
		return exp;
	}
}