Bug 177439 Need an easy way to determine default value for a dynamic parameter
Currently, I have to bring up the data set editor, preview the results in the data set and make a mental note of the value to use for a report parameter that depends on a data set. It would be nice to have a drop down on the default value field, such as <Select value> which when selected queries the data set and presents me with a list to select from.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
.iterator( ); iterator.hasNext( ); )
		{
			DataSetHandle DataSetHandle = (DataSetHandle) iterator.next( );
			dataSetList.add( DataSetHandle.getQualifiedName( ) );
		}
		if ( inputParameter.getDataSetName( ) != null
				&& !dataSetList.contains( inputParameter.getDataSetName( ) ) )
		{
			dataSetList.add( 0, inputParameter.getDataSetName( ) );
		}
		if ( oldList.length != dataSetList.size( ) )
		{
			dataSetChooser.setItems( (String[]) dataSetList.toArray( new String[]{} ) );
			if ( StringUtil.isBlank( selectedDataSetName ) )
			{
				dataSetChooser.select( 0 );
				refreshColumns( false );
			}
			else
			{
				dataSetChooser.setText( selectedDataSetName );
			}
		}
	}
	private void refreshColumns( boolean onlyFilter )
	{
		if ( columnChooser == null )
		{
			return;
		}