Bug 153523 OK button in parameter dialog is enabled without default value in combo-box
Description: OK button in parameter dialog is enabled without default value in combo-box Steps to reproduce: 1. New a report parameter, combo-box. 2. Click New button, input abc as value, click OK 3. Set abc as default value and close Edit Parameter dialog. 4. New a data source and dataset 5. Edit the parameter, remove abc value and import values from dataset Expected result: OK button is disabled for there is no default value. Actual result: OK button is enabled.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
if ( !containValue( null, importValues[i], COLUMN_VALUE ) )
						{
							SelectionChoice choice = StructureFactory.createSelectionChoice( );
							choice.setValue( importValues[i] );
							choiceList.add( choice );
						}
					}
					refreshValueTable( );
				}
			}
		} );
		changeDefault = new Button( buttonBar, SWT.TOGGLE );
		changeDefault.addSelectionListener( new SelectionAdapter( ) {
			public void widgetSelected( SelectionEvent e )
			{
				SelectionChoice choice = (SelectionChoice) ( (IStructuredSelection) valueTable.getSelection( ) ).getFirstElement( );
				if ( isDefaultChoice( choice ) )
				{
					defaultValue = null;
				}
				else
				{
					defaultValue = choice.getValue( );
				}
				refreshValueTable( );
				updateMessageLine( );
				updateButtons( );
				changeDefault.getParent( ).layout( );
			}
		} );