Java Tutorial/SWT/Menu

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Add MenuItem to Menu

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
public class MenuAddMenuItem {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new GridLayout());
    // Create the bar menu
    Menu menuBar = new Menu(shell, SWT.BAR);
    // Create the File item"s dropdown menu
    Menu fileMenu = new Menu(menuBar);
    // Create all the items in the bar menu
    MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE);
    fileItem.setText("File");
    fileItem.setMenu(fileMenu);
    // Create all the items in the File dropdown menu
    MenuItem newItem = new MenuItem(fileMenu, SWT.NONE);
    newItem.setText("New");
    MenuItem openItem = new MenuItem(fileMenu, SWT.NONE);
    openItem.setText("Open...");
    MenuItem saveItem = new MenuItem(fileMenu, SWT.NONE);
    saveItem.setText("Save");
    MenuItem saveAsItem = new MenuItem(fileMenu, SWT.NONE);
    saveAsItem.setText("Save As...");
    shell.setMenuBar(menuBar);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
  }
}





Add Menu Separator

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
public class MenuSeparatorAdd {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new GridLayout());
    // Create the bar menu
    Menu menuBar = new Menu(shell, SWT.BAR);
    // Create the File item"s dropdown menu
    Menu fileMenu = new Menu(menuBar);
    // Create all the items in the bar menu
    MenuItem fileItem = new MenuItem(menuBar, SWT.CASCADE);
    fileItem.setText("File");
    fileItem.setMenu(fileMenu);
    // Create all the items in the File dropdown menu
    MenuItem newItem = new MenuItem(fileMenu, SWT.NONE);
    newItem.setText("New");
    //  Create the first separator
    new MenuItem(fileMenu, SWT.SEPARATOR);
    
    MenuItem saveItem = new MenuItem(fileMenu, SWT.NONE);
    saveItem.setText("Save");
    shell.setMenuBar(menuBar);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
  }
}





Cascade Menu

import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
public class MenuCascade {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new GridLayout());
    Button bn = new Button(shell, SWT.FLAT);
    bn.setText("Right Click to see the popup menu");
    
    Menu popupMenu = new Menu(bn);
    MenuItem newItem = new MenuItem(popupMenu, SWT.CASCADE);
    newItem.setText("New");
    MenuItem refreshItem = new MenuItem(popupMenu, SWT.NONE);
    refreshItem.setText("Refresh");
    MenuItem deleteItem = new MenuItem(popupMenu, SWT.NONE);
    deleteItem.setText("Delete");
    Menu newMenu = new Menu(popupMenu);
    newItem.setMenu(newMenu);
    MenuItem shortcutItem = new MenuItem(newMenu, SWT.NONE);
    shortcutItem.setText("Shortcut");
    MenuItem iconItem = new MenuItem(newMenu, SWT.NONE);
    iconItem.setText("Icon");
    bn.setMenu(popupMenu);
    
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch()) {
        display.sleep();
      }
    }
  }
}





Enable menu items dynamically (when menu shown)

/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
public class MenuItemEnableDynamically {
  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    final Tree tree = new Tree(shell, SWT.BORDER | SWT.MULTI);
    final Menu menu = new Menu(shell, SWT.POP_UP);
    tree.setMenu(menu);
    for (int i = 0; i < 12; i++) {
      TreeItem treeItem = new TreeItem(tree, SWT.NONE);
      treeItem.setText("Item " + i);
      MenuItem menuItem = new MenuItem(menu, SWT.PUSH);
      menuItem.setText(treeItem.getText());
    }
    menu.addListener(SWT.Show, new Listener() {
      public void handleEvent(Event event) {
        MenuItem[] menuItems = menu.getItems();
        TreeItem[] treeItems = tree.getSelection();
        for (int i = 0; i < menuItems.length; i++) {
          String text = menuItems[i].getText();
          int index = 0;
          while (index < treeItems.length) {
            if (treeItems[index].getText().equals(text))
              break;
            index++;
          }
          menuItems[i].setEnabled(index != treeItems.length);
        }
      }
    });
    tree.setSize(200, 200);
    shell.setSize(300, 300);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}





Fill a menu dynamically (when menu shown)

/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
/*
 * Menu example snippet: fill a menu dynamically (when menu shown)
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.MenuItem;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
public class MenuFillDynamically {
  public static void main(String[] args) {
    final Display display = new Display();
    Shell shell = new Shell(display);
    final Tree tree = new Tree(shell, SWT.BORDER | SWT.MULTI);
    final Menu menu = new Menu(shell, SWT.POP_UP);
    tree.setMenu(menu);
    for (int i = 0; i < 12; i++) {
      TreeItem item = new TreeItem(tree, SWT.NONE);
      item.setText("Item " + i);
    }
    menu.addListener(SWT.Show, new Listener() {
      public void handleEvent(Event event) {
        MenuItem[] menuItems = menu.getItems();
        for (int i = 0; i < menuItems.length; i++) {
          menuItems[i].dispose();
        }
        TreeItem[] treeItems = tree.getSelection();
        for (int i = 0; i < treeItems.length; i++) {
          MenuItem menuItem = new MenuItem(menu, SWT.PUSH);
          menuItem.setText(treeItems[i].getText());
        }
      }
    });
    tree.setSize(200, 200);
    shell.setSize(300, 300);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}


Источник — «http://jexp.ru/index.php?title=Java_Tutorial/SWT/Menu&oldid=3044»