Fill a menu dynamically (when menu shown) : Menu « SWT « Java Tutorial






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();
  }
}








17.30.Menu
17.30.1.Add MenuItem to MenuAdd MenuItem to Menu
17.30.2.Add Menu SeparatorAdd Menu Separator
17.30.3.Cascade MenuCascade Menu
17.30.4.Fill a menu dynamically (when menu shown)Fill a menu dynamically (when menu shown)
17.30.5.Enable menu items dynamically (when menu shown)Enable menu items dynamically (when menu shown)