/*******************************************************************************
 * Copyright (c) 2007, 2009 compeople AG 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:
 *    compeople AG - initial API and implementation
 *******************************************************************************/

import org.eclipse.jface.action.Action;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.CoolBar;
import org.eclipse.swt.widgets.CoolItem;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Label;
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.ToolBar;
import org.eclipse.swt.widgets.ToolItem;

/**
 * Snippet for discussing Bug 281433.
 */
public class Snippet281433 {

	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout(SWT.VERTICAL));

		Label logo = new Label(shell, SWT.NONE);
		logo.setBackground(logo.getDisplay().getSystemColor(SWT.COLOR_CYAN));
		logo.setText("Something else like a logo does here.\nMenu goes beneath");

		CoolBar coolBar = new CoolBar(shell, SWT.FLAT);
		coolBar.setLocked(true);

		CoolItem coolItem = new CoolItem(coolBar, SWT.NONE);
		ToolBar toolBar = new ToolBar(coolBar, SWT.FLAT);
		coolItem.setControl(toolBar);

		String[] menus = { "&File", "&Edit", "&Source" };
		for (String s : menus) {
			ToolItem toolItem = new ToolItem(toolBar, SWT.RADIO);
			toolItem.setText(s);
			Menu menu = createMenu(toolItem, s + ": ");
			new TopItemListener(menu, toolItem);
		}

		display.addFilter(SWT.KeyUp, new Listener() {
			public void handleEvent(Event event) {
				System.out.println("KeyUp: " + event);
			}
		});

		coolItem.setSize(coolItem.computeSize(SWT.DEFAULT, SWT.DEFAULT));
		shell.setSize(300, 200);
		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}

	// helping methods
	//////////////////

	private static Action createAction(final String caption) {
		Action result = new Action() {
			public void run() {
				System.out.println(caption);
			};
		};
		result.setText(caption);
		return result;
	}

	private static Menu createMenu(ToolItem toolItem, String prefix) {
		Menu result = new Menu(toolItem.getParent());
		String[] items = { "Item 1", "Item 2", "Item 3", "Item 4" };
		for (String s : items) {
			MenuItem item = new MenuItem(result, SWT.NONE);
			item.setText(prefix + s);
		}
		result.setVisible(false);
		return result;
	}

	// helping classes
	//////////////////

	private static class TopItemListener extends SelectionAdapter {

		private final ToolItem toolItem;
		private final Menu menu;

		public TopItemListener(Menu menu, ToolItem toolItem) {
			this.menu = menu;
			this.toolItem = toolItem;
			this.toolItem.addSelectionListener(this);
		}

		public void widgetSelected(SelectionEvent e) {
			System.out.println(e);
			if (e.getSource() == toolItem) {
				if (toolItem.getSelection()) {
					Rectangle bounds = toolItem.getBounds();
					Point loc = toolItem.getParent().toDisplay(bounds.x, bounds.height + bounds.y);
					menu.setLocation(loc);
					menu.setVisible(true);
				} else {
					menu.setVisible(false);
				}
			}
		}
	}
}