Bug 259954 [Import/Export] Warning should be displayed when no projects are available in the archive/directory
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardProjectsImportPage.java
*/
			public void widgetSelected(SelectionEvent e) {
				projectsList.setCheckedElements(new Object[0]);
				setPageComplete(false);
			}
		});
		Dialog.applyDialogFont(deselectAll);
		setButtonLayoutData(deselectAll);
		Button refresh = new Button(buttonsComposite, SWT.PUSH);
		refresh.setText(DataTransferMessages.DataTransfer_refresh);
		refresh.addSelectionListener(new SelectionAdapter() {
			/*
			 * (non-Javadoc)
			 * 
			 * @see
			 * org.eclipse.swt.events.SelectionAdapter#widgetSelected(org.eclipse
			 * .swt.events.SelectionEvent)
			 */
			public void widgetSelected(SelectionEvent e) {
				if (projectFromDirectoryRadio.getSelection()) {
					updateProjectsList(directoryPathField.getText().trim());
				} else {
					updateProjectsList(archivePathField.getText().trim());
				}
			}
		});
		Dialog.applyDialogFont(refresh);
		setButtonLayoutData(refresh);
	}
	/**