/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.ui.internal.ide;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.action.ActionContributionItem;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.action.IContributionItem;
import org.eclipse.jface.action.IMenuCreator;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.IWorkbenchWindowPulldownDelegate2;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.ActionFactory;
import org.eclipse.ui.actions.NewWizardMenu;

/**
 * Invoke the resource creation wizard selection Wizard.
 * This action will retarget to the active view.
 */
public class NewWizardDropDownAction
		extends Action
		implements ActionFactory.IWorkbenchAction,
			IMenuCreator,
			IWorkbenchWindowPulldownDelegate2 {

	/**
	 * The workbench window; or <code>null</code> if this
	 * action has been <code>dispose</code>d.
	 */
	private IWorkbenchWindow workbenchWindow;

	private IAction newWizardAction;
	
	private MenuManager dropDownMenuMgr;
	/**
	 *	Create a new instance of this class
	 */
	public NewWizardDropDownAction(IWorkbenchWindow window, IAction newWizardAction) {
		super(IDEWorkbenchMessages.getString("NewWizardDropDown.text")); //$NON-NLS-1$
		if (window == null) {
			throw new IllegalArgumentException();
		}
		this.workbenchWindow = window;
		this.newWizardAction = newWizardAction;
		setToolTipText(newWizardAction.getToolTipText());

		// @issues should be IDE-specific images
		ISharedImages sharedImages = PlatformUI.getWorkbench().getSharedImages();
		setImageDescriptor(
			sharedImages.getImageDescriptor(ISharedImages.IMG_TOOL_NEW_WIZARD));
		setHoverImageDescriptor(
			sharedImages.getImageDescriptor(ISharedImages.IMG_TOOL_NEW_WIZARD_HOVER));
		setDisabledImageDescriptor(
			sharedImages.getImageDescriptor(ISharedImages.IMG_TOOL_NEW_WIZARD_DISABLED));

		setMenuCreator(this);
	}
	/**
	 * create the menu manager for the drop down menu.
	 */
	protected void createDropDownMenuMgr() {
		if (dropDownMenuMgr == null) {
			dropDownMenuMgr = new MenuManager();
			dropDownMenuMgr.add(new NewWizardMenu(workbenchWindow));
		}
	}
	/**
	 * dispose method comment.
	 */
	public void dispose() {
		if (workbenchWindow == null) {
			// action has already been disposed
			return;
		}
		if (dropDownMenuMgr != null) {
			dropDownMenuMgr.dispose();
			dropDownMenuMgr = null;
		}
	}
	/**
	 * getMenu method comment.
	 */
	public Menu getMenu(Control parent) {
		createDropDownMenuMgr();
		return dropDownMenuMgr.createContextMenu(parent);
	}
	/**
	 * Create the drop down menu as a submenu of parent.  Necessary
	 * for CoolBar support.
	 */
	public Menu getMenu(Menu parent) {
		createDropDownMenuMgr();
		Menu menu = new Menu(parent);
		IContributionItem[] items = dropDownMenuMgr.getItems();
		for (int i = 0; i < items.length; i++) {
			IContributionItem item = items[i];
			IContributionItem newItem = item;
			if (item instanceof ActionContributionItem) {
				newItem = new ActionContributionItem(((ActionContributionItem) item).getAction());
			}
			newItem.fill(menu, -1);
		}
		return menu;
	}
	/**
	 * @see IWorkbenchWindowActionDelegate#init(IWorkbenchWindow)
	 */
	public void init(IWorkbenchWindow window) {
	}
	public void run() {
		if (workbenchWindow == null) {
			// action has been disposed
			return;
		}
		newWizardAction.run();
	}
	/**
	 * @see runWithEvent(IAction, Event)
	 * @see IActionDelegate#run(IAction)
	 */
	public void run(IAction action) {
	}
	/**
	 * @see IActionDelegate#selectionChanged(IAction, ISelection)
	 */
	public void selectionChanged(IAction action, ISelection selection) {
	}
}