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
expressionBuilder.getResult( ).trim( ) );
				}
			}
		} );
		
		createDefaultEditor( );
		createLabel( valueArea, null );
		createPromptLine( valueArea );
		listLimit.setEditable( true );
	}
	private void clearDefaultValueText( )
	{
		if ( defaultValueChooser == null )
			return;
		String textValue = defaultValueChooser.getText( );
		if ( textValue != null
				&& textValue.equals( CHOICE_NULL_VALUE )
				|| textValue.equals( CHOICE_BLANK_VALUE ) )
		{
			defaultValueChooser.setText( "" );
		}
	}
	private void clearDefaultValueChooserSelections( )
	{
		if ( defaultValueChooser == null )
			return;
		if ( defaultValueChooser.getItemCount( ) > 0 )
		{
			defaultValueChooser.remove( 0,
					defaultValueChooser.getItemCount( ) - 1 );