How to use

isDialogEnabled

method

in

org.eclipse.jdt.internal.ui.dialogs.OptionalMessageDialog

/**
 * Opens the dialog but only if the user hasn't chosen to hide it.
 *
 * @return the index of the pressed button or {@link SWT#DEFAULT} if the dialog got dismissed
 *         without pressing a button (e.g. via Esc) or {{@link #NOT_SHOWN} if the dialog was not
 *         shown
 */
public static int open(String id, Shell parent, String title, Image titleImage, String message, int dialogType, String[] buttonLabels, int defaultButtonIndex, String checkboxText) {
  if (!isDialogEnabled(id))
    return OptionalMessageDialog.NOT_SHOWN;
  MessageDialog dialog= new OptionalMessageDialog(id, parent, title, titleImage, message, dialogType, buttonLabels, defaultButtonIndex, checkboxText);
  return dialog.open();
}

/**
 * Opens the dialog but only if the user hasn't choosen to hide it.
 * Returns <code>NOT_SHOWN</code> if the dialog was not shown.
 */
public static int open(String id, Shell parent, String title, Image titleImage, String message, int dialogType, String[] buttonLabels, int defaultButtonIndex) {
  if (!isDialogEnabled(id))
    return OptionalMessageDialog.NOT_SHOWN;
  
  MessageDialog dialog= new OptionalMessageDialog(id, parent, title, titleImage, message, dialogType, buttonLabels, defaultButtonIndex);
  return dialog.open();
}

/**
 * Opens the dialog but only if the user hasn't chosen to hide it.
 *
 * @return the index of the pressed button or {@link SWT#DEFAULT} if the dialog got dismissed
 *         without pressing a button (e.g. via Esc) or {{@link #NOT_SHOWN} if the dialog was not
 *         shown
 */
public static int open(String id, Shell parent, String title, Image titleImage, String message, int dialogType, String[] buttonLabels, int defaultButtonIndex, String checkboxText) {
  if (!isDialogEnabled(id))
    return OptionalMessageDialog.NOT_SHOWN;
  MessageDialog dialog= new OptionalMessageDialog(id, parent, title, titleImage, message, dialogType, buttonLabels, defaultButtonIndex, checkboxText);
  return dialog.open();
}

private void showSlowCleanUpDialog(final StringBuilder cleanUpNames) {
  if (OptionalMessageDialog.isDialogEnabled(SlowCleanUpWarningDialog.ID)) {
    Shell shell= PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
    new SlowCleanUpWarningDialog(shell, FixMessages.CleanUpPostSaveListener_SlowCleanUpDialog_title, cleanUpNames.toString()).open();
  }
}

private void showSlowCleanUpDialog(final StringBuffer cleanUpNames) {
  if (OptionalMessageDialog.isDialogEnabled(SlowCleanUpWarningDialog.ID)) {
    Shell shell= PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell();
    new SlowCleanUpWarningDialog(shell, FixMessages.CleanUpPostSaveListener_SlowCleanUpDialog_title, cleanUpNames.toString()).open();
  }
}

protected void warnAboutTypeCommentDeprecation() {
  String key= IUIConstants.DIALOGSTORE_TYPECOMMENT_DEPRECATED;
  if (OptionalMessageDialog.isDialogEnabled(key)) {
    TemplateStore templates= JavaPlugin.getDefault().getTemplateStore();
    boolean isOldWorkspace= templates.findTemplate("filecomment") != null && templates.findTemplate("typecomment") != null; //$NON-NLS-1$ //$NON-NLS-2$
    if (!isOldWorkspace) {
      OptionalMessageDialog.setDialogEnabled(key, false);
    }
    String title= NewWizardMessages.NewElementWizard_typecomment_deprecated_title;
    String message= NewWizardMessages.NewElementWizard_typecomment_deprecated_message;
    OptionalMessageDialog.open(key, getShell(), title, null, message, MessageDialog.INFORMATION, new String[] { IDialogConstants.OK_LABEL }, 0);
  }
}

protected void warnAboutTypeCommentDeprecation() {
  String key= IUIConstants.DIALOGSTORE_TYPECOMMENT_DEPRECATED;
  if (OptionalMessageDialog.isDialogEnabled(key)) {
    TemplateStore templates= JavaPlugin.getDefault().getTemplateStore();
    boolean isOldWorkspace= templates.findTemplate("filecomment") != null && templates.findTemplate("typecomment") != null; //$NON-NLS-1$ //$NON-NLS-2$
    if (!isOldWorkspace) {
      OptionalMessageDialog.setDialogEnabled(key, false);
    }
    String title= NewWizardMessages.NewElementWizard_typecomment_deprecated_title; 
    String message= NewWizardMessages.NewElementWizard_typecomment_deprecated_message; 
    OptionalMessageDialog.open(key, getShell(), title, null, message, MessageDialog.INFORMATION, new String[] { IDialogConstants.OK_LABEL }, 0);
  }
}

protected void warnAboutTypeCommentDeprecation() {
  String key= IUIConstants.DIALOGSTORE_TYPECOMMENT_DEPRECATED;
  if (OptionalMessageDialog.isDialogEnabled(key)) {
    TemplateStore templates= JavaPlugin.getDefault().getTemplateStore();
    boolean isOldWorkspace= templates.findTemplate("filecomment") != null && templates.findTemplate("typecomment") != null; //$NON-NLS-1$ //$NON-NLS-2$
    if (!isOldWorkspace) {
      OptionalMessageDialog.setDialogEnabled(key, false);
    }
    String title= NewWizardMessages.NewElementWizard_typecomment_deprecated_title;
    String message= NewWizardMessages.NewElementWizard_typecomment_deprecated_message;
    OptionalMessageDialog.open(key, getShell(), title, null, message, MessageDialog.INFORMATION, new String[] { IDialogConstants.OK_LABEL }, 0);
  }
}

if (OptionalMessageDialog.isDialogEnabled(PREF_WARN_ABOUT_EMPTY_ASSIST_CATEGORY)) {
  final Shell shell= JavaPlugin.getActiveWorkbenchShell();
  String title= JavaTextMessages.ContentAssistProcessor_all_disabled_title;

if (OptionalMessageDialog.isDialogEnabled(PREF_WARN_ABOUT_EMPTY_ASSIST_CATEGORY)) {
  final Shell shell= JavaPlugin.getActiveWorkbenchShell();
  String title= JavaTextMessages.ContentAssistProcessor_all_disabled_title;

if (OptionalMessageDialog.isDialogEnabled(PREF_WARN_ABOUT_EMPTY_ASSIST_CATEGORY)) {
  final Shell shell= JavaPlugin.getActiveWorkbenchShell();
  String title= JavaTextMessages.ContentAssistProcessor_all_disabled_title;

@Override
public boolean performFinish() {
  LibraryHandler libraryHandler= fJarPackageWizardPage.getLibraryHandler();
  fJarPackage.setJarBuilder(libraryHandler.getBuilder(fJarPackage));
  MultiStatus status= new MultiStatus(JavaPlugin.getPluginId(), IStatus.OK, FatJarPackagerMessages.FatJarPackageWizard_JarExportProblems_message, null);
  Object[] elements= fJarPackageWizardPage.getSelectedElementsWithoutContainedChildren(status);
  fJarPackage.setElements(elements);
  if ((libraryHandler.isShowWarning()) && hasArchive(elements)) {
    if (OptionalMessageDialog.isDialogEnabled(IPIssueWarningDialog.ID)) {
      IPIssueWarningDialog dialog= new IPIssueWarningDialog(getShell(), FatJarPackagerMessages.FatJarPackageWizard_IPIssueDialog_title,
          FatJarPackagerMessages.FatJarPackageWizard_IPIssueDialog_message);
      if (dialog.open() != Window.OK)
        return false;
    }
  }
  fJarPackageWizardPage.exportAntScript(status);
  if (!executeExportOperation(fJarPackage.createJarExportRunnable(getShell()), status))
    return false;
  // Save the dialog settings
  if (fHasNewDialogSettings) {
    IDialogSettings workbenchSettings= JavaPlugin.getDefault().getDialogSettings();
    IDialogSettings section= workbenchSettings.getSection(DIALOG_SETTINGS_KEY);
    section= workbenchSettings.addNewSection(DIALOG_SETTINGS_KEY);
    setDialogSettings(section);
  }
  fJarPackageWizardPage.finish();
  return true;
}

@Override
public boolean performFinish() {
  LibraryHandler libraryHandler= fJarPackageWizardPage.getLibraryHandler();
  fJarPackage.setJarBuilder(libraryHandler.getBuilder(fJarPackage));
  MultiStatus status= new MultiStatus(JavaPlugin.getPluginId(), IStatus.OK, FatJarPackagerMessages.FatJarPackageWizard_JarExportProblems_message, null);
  Object[] elements= fJarPackageWizardPage.getSelectedElementsWithoutContainedChildren(status);
  fJarPackage.setElements(elements);
  if ((libraryHandler.isShowWarning()) && hasArchive(elements)) {
    if (OptionalMessageDialog.isDialogEnabled(IPIssueWarningDialog.ID)) {
      IPIssueWarningDialog dialog= new IPIssueWarningDialog(getShell(), FatJarPackagerMessages.FatJarPackageWizard_IPIssueDialog_title,
          FatJarPackagerMessages.FatJarPackageWizard_IPIssueDialog_message);
      if (dialog.open() != Window.OK)
        return false;
    }
  }
  fJarPackageWizardPage.exportAntScript(status);
  if (!executeExportOperation(fJarPackage.createJarExportRunnable(getShell()), status))
    return false;
  // Save the dialog settings
  if (fHasNewDialogSettings) {
    IDialogSettings workbenchSettings= JavaPlugin.getDefault().getDialogSettings();
    IDialogSettings section= workbenchSettings.getSection(DIALOG_SETTINGS_KEY);
    section= workbenchSettings.addNewSection(DIALOG_SETTINGS_KEY);
    setDialogSettings(section);
  }
  fJarPackageWizardPage.finish();
  return true;
}

@Override
public boolean performFinish() {
  LibraryHandler libraryHandler= fJarPackageWizardPage.getLibraryHandler();
  fJarPackage.setJarBuilder(libraryHandler.getBuilder(fJarPackage));
  MultiStatus status= new MultiStatus(JavaPlugin.getPluginId(), IStatus.OK, FatJarPackagerMessages.FatJarPackageWizard_JarExportProblems_message, null);
  Object[] elements= fJarPackageWizardPage.getSelectedElementsWithoutContainedChildren(status);
  fJarPackage.setElements(elements);
  if ((libraryHandler.isShowWarning()) && hasArchive(elements)) {
    if (OptionalMessageDialog.isDialogEnabled(IPIssueWarningDialog.ID)) {
      IPIssueWarningDialog dialog= new IPIssueWarningDialog(getShell(), FatJarPackagerMessages.FatJarPackageWizard_IPIssueDialog_title,
          FatJarPackagerMessages.FatJarPackageWizard_IPIssueDialog_message);
      if (dialog.open() != Window.OK)
        return false;
    }
  }
  fJarPackageWizardPage.exportAntScript(status);
  if (!executeExportOperation(fJarPackage.createJarExportRunnable(getShell()), status))
    return false;
  // Save the dialog settings
  if (fHasNewDialogSettings) {
    IDialogSettings workbenchSettings= JavaPlugin.getDefault().getDialogSettings();
    IDialogSettings section= workbenchSettings.getSection(DIALOG_SETTINGS_KEY);
    section= workbenchSettings.addNewSection(DIALOG_SETTINGS_KEY);
    setDialogSettings(section);
  }
  fJarPackageWizardPage.finish();
  return true;
}