// $Id: ActionNew.java,v 1.23 2004/09/16 20:50:04 mvw Exp $
// Copyright (c) 1996-2001 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies.  This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason.  IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE. THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY
// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
// PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
// CALIFORNIA HAS NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT,
// UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

package org.argouml.uml.ui;

import java.awt.Window;
import java.awt.event.ActionEvent;
import java.text.MessageFormat;

import javax.swing.JOptionPane;

import org.argouml.cognitive.Designer;
import org.argouml.i18n.Translator;
import org.argouml.kernel.Project;
import org.argouml.kernel.ProjectManager;
import org.argouml.ui.FindDialog;
import org.argouml.ui.ProjectBrowser;
import org.argouml.ui.targetmanager.TargetManager;

/** Action to trigger creation of a new project.
 * @stereotype singleton
 */
public class ActionNew extends UMLAction {

    ////////////////////////////////////////////////////////////////
    // static variables

    /**
     * The singleton.
     */
    public static final ActionNew SINGLETON = new ActionNew(); 

    ////////////////////////////////////////////////////////////////
    // constructors

    /**
     * The constructor.
     */
    protected ActionNew() { super("action.new"); }

    ////////////////////////////////////////////////////////////////
    // main methods

    /**
     * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
     */
    public void actionPerformed(ActionEvent e) {
	ProjectBrowser pb = ProjectBrowser.getInstance();
	Project p = ProjectManager.getManager().getCurrentProject();

	if (p != null && p.needsSave()) {
	    String t =
		MessageFormat.format(Translator.localize("Actions",
				"optionpane.new-project-save-changes-to"),
				new Object[] {p.getName()} );
	    int response =
		JOptionPane.showConfirmDialog(pb, t, t,
					      JOptionPane.YES_NO_CANCEL_OPTION
		);

	    if (response == JOptionPane.CANCEL_OPTION 
	        || response == JOptionPane.CLOSED_OPTION) return;
	    if (response == JOptionPane.YES_OPTION) {
		boolean safe = false;

		if (ActionSaveProject.SINGLETON.shouldBeEnabled()) {
		    safe = ActionSaveProject.SINGLETON.trySave (true);
		}
		if (!safe) {
		    safe = ActionSaveProjectAs.SINGLETON.trySave (false);
		}          
		if (!safe) return;
	    }
	    //TODO: if you cancel the save it should cancel open
	    //Steffen Zschaler 01/10/2002 - Well, it does, doesn't it?
	    //trySave will return false in that case...
	}

	// we should remove all open dialogs. They have as parent the
	// ProjectBrowser
	Window[] windows = ProjectBrowser.getInstance().getOwnedWindows();
	for (int i = 0; i < windows.length; i++) {
	    windows[i].dispose();
	}

	Designer.disableCritiquing();
	Designer.clearCritiquing();
	// clean the history
	TargetManager.getInstance().cleanHistory();
        p.remove();
	p = ProjectManager.getManager().makeEmptyProject();
	FindDialog.getInstance().doClearTabs();
	FindDialog.getInstance().doResetFields();
	TargetManager.getInstance().setTarget(p.getDiagrams().toArray()[0]);
	Designer.enableCritiquing();
    }
} /* end class ActionNew */