TitleAreaDialog: MailDialog : Dialog « SWT JFace Eclipse « Java

TitleAreaDialog: MailDialog

import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.List;
import org.eclipse.swt.widgets.Shell;

public class MailDialog extends TitleAreaDialog {
  // IDs for MailDialog buttons
  // We use large integers because we don't want
  // to conflict with system constants
  public static final int OPEN = 9999;

  public static final int DELETE = 9998;

  // List widget
  List list;

  // Initial content of the list
  String[] items;

  // Selected items
  String[] itemsToOpen;

   * Constructor for MailDialog.
   * @param shell -
   *            Containing shell
   * @param items -
   *            Mail messages passed to the dialog
  public MailDialog(Shell shell, String[] items) {
    this.items = items;

   * @see org.eclipse.jface.window.Window#create() We complete the dialog with
   *      a title and a message
  public void create() {
    setMessage("You have mail! \n It could be vital for this evening...");

   * @see org.eclipse.jface.dialogs.Dialog#
   *      createDialogArea(org.eclipse.swt.widgets.Composite) Here we fill the
   *      center area of the dialog
  protected Control createDialogArea(Composite parent) {
    // Create new composite as container
    final Composite area = new Composite(parent, SWT.NULL);
    // We use a grid layout and set the size of the margins
    final GridLayout gridLayout = new GridLayout();
    gridLayout.marginWidth = 15;
    gridLayout.marginHeight = 10;
    // Now we create the list widget
    list = new List(area, SWT.BORDER | SWT.MULTI);
    // We define a minimum width for the list
    final GridData gridData = new GridData();
    gridData.widthHint = 200;
    // We add a SelectionListener
    list.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent e) {
        // When the selection changes, we re-validate the list
    // We add the initial mail messages to the list
    for (int i = 0; i < items.length; i++) {
    return area;

  private void validate() {
    // We select the number of selected list entries
    boolean selected = (list.getSelectionCount() > 0);
    // We enable/disable the Open and Delete buttons
    if (!selected)
      // If nothing was selected, we set an error message
      setErrorMessage("Select at least one entry!");
      // Otherwise we set the error message to null
      // to show the intial content of the message area

   * @see org.eclipse.jface.dialogs.Dialog#
   *      createButtonsForButtonBar(org.eclipse.swt.widgets.Composite) We
   *      replace the OK and Cancel buttons by our own creations We use the
   *      method createButton() (from Dialog), to create the new buttons
  protected void createButtonsForButtonBar(Composite parent) {
    // Create Open button
    Button openButton = createButton(parent, OPEN, "Open", true);
    // Initially deactivate it
    // Add a SelectionListener
    openButton.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent e) {
        // Retrieve selected entries from list
        itemsToOpen = list.getSelection();
        // Set return code
        // Close dialog
    // Create Delete button
    Button deleteButton = createButton(parent, DELETE, "Delete", false);
    // Add a SelectionListener
    deleteButton.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent e) {
        // Get the indices of the selected entries
        int selectedItems[] = list.getSelectionIndices();
        // Remove all these entries
        // Now re-validate the list because it has changed
    // Create Cancel button
    Button cancelButton = createButton(parent, CANCEL, "Cancel", false);
    // Add a SelectionListener
    cancelButton.addSelectionListener(new SelectionAdapter() {
      public void widgetSelected(SelectionEvent e) {

   * Method getItemsToOpen.
   * @return String[] - the selected items
  public String[] getItemsToOpen() {
    return itemsToOpen;


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