public void refresh() {
   IGrailsInstall defaultInstall =
       GrailsCoreActivator.getDefault().getInstallManager().getDefaultGrailsInstall();
   if (defaultInstall != null) {
     useDefault.setText(
         org.grails.ide.eclipse.ui.internal.wizard.NewGrailsWizardMessages
                 .NewGrailsProjectWizardPageOne_useDefaultGrailsInstallation
             + defaultInstall.getName()
             + "')");
   } else {
     setErrorMessage(
         org.grails.ide.eclipse.ui.internal.wizard.NewGrailsWizardMessages
             .NewGrailsProjectWizardPageOne_noGrailsInstallation);
     setPageComplete(false);
     useDefault.setText(
         org.grails.ide.eclipse.ui.internal.wizard.NewGrailsWizardMessages
             .NewGrailsProjectWizardPageOne_useDefaultGrailsInstallationNoCurrent);
   }
   grailsInstallCombo.setItems(
       GrailsCoreActivator.getDefault().getInstallManager().getAllInstallNames());
   String[] names = grailsInstallCombo.getItems();
   for (int i = 0; i < names.length; i++) {
     if (GrailsCoreActivator.getDefault()
         .getInstallManager()
         .getGrailsInstall(names[i])
         .isDefault()) {
       grailsInstallCombo.select(i);
       break;
     }
   }
   setChanged();
   notifyObservers();
 }
    public Control createControl(Composite composite) {
      Group grailsHomeGroup = new Group(composite, SWT.NONE);
      grailsHomeGroup.setFont(composite.getFont());
      grailsHomeGroup.setText("Grails Installation");
      grailsHomeGroup.setLayout(initGridLayout(new GridLayout(1, false), true));

      useDefault = new Button(grailsHomeGroup, SWT.RADIO);

      IGrailsInstall defaultInstall =
          GrailsCoreActivator.getDefault().getInstallManager().getDefaultGrailsInstall();
      if (defaultInstall != null) {
        useDefault.setText(
            org.grails.ide.eclipse.ui.internal.wizard.NewGrailsWizardMessages
                    .NewGrailsProjectWizardPageOne_useDefaultGrailsInstallation
                + defaultInstall.getName()
                + "')");
      } else {
        setErrorMessage(
            org.grails.ide.eclipse.ui.internal.wizard.NewGrailsWizardMessages
                .NewGrailsProjectWizardPageOne_noGrailsInstallation);
        setPageComplete(false);
        useDefault.setText(
            org.grails.ide.eclipse.ui.internal.wizard.NewGrailsWizardMessages
                .NewGrailsProjectWizardPageOne_useDefaultGrailsInstallationNoCurrent);
      }
      useDefault.setSelection(true);
      useDefault.addSelectionListener(
          new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent e) {
              grailsInstallCombo.setEnabled(false);
            }
          });

      useSpecific = new Button(grailsHomeGroup, SWT.RADIO);
      useSpecific.setText("Use project specific Grails installation:");
      useSpecific.addSelectionListener(
          new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
              grailsInstallCombo.setEnabled(true);
            }
          });

      final Composite installComposite = new Composite(grailsHomeGroup, SWT.NULL);
      installComposite.setFont(composite.getFont());
      installComposite.setLayout(new GridLayout(3, false));
      installComposite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

      Label options = new Label(installComposite, SWT.WRAP);
      options.setText("Install: ");
      options.setLayoutData(new GridData(GridData.BEGINNING));

      grailsInstallCombo = new Combo(installComposite, SWT.DROP_DOWN | SWT.READ_ONLY);
      grailsInstallCombo.setItems(
          GrailsCoreActivator.getDefault().getInstallManager().getAllInstallNames());
      grailsInstallCombo.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

      String[] names = grailsInstallCombo.getItems();
      for (int i = 0; i < names.length; i++) {
        if (GrailsCoreActivator.getDefault()
            .getInstallManager()
            .getGrailsInstall(names[i])
            .isDefault()) {
          grailsInstallCombo.select(i);
          break;
        }
      }
      grailsInstallCombo.setEnabled(false);
      grailsHomeGroup.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

      Link link = new Link(installComposite, SWT.NONE);
      link.setFont(composite.getFont());
      link.setText("<A>Configure Grails Installations....</A>"); // $NON-NLS-1$//$NON-NLS-2$
      link.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_END));
      link.addSelectionListener(
          new SelectionListener() {
            public void widgetSelected(SelectionEvent e) {
              openPreferences();
            }

            public void widgetDefaultSelected(SelectionEvent e) {
              openPreferences();
            }
          });

      return grailsHomeGroup;
    }