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/*
 * $Id: FileChooserAction.java 3117 2008-01-31 05:53:22Z xlv $
 *
 * Copyright 2007 Bruno Lowagie.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

package com.lowagie.rups.io;

import java.awt.event.ActionEvent;
import java.io.File;
import java.util.Observable;
import javax.swing.AbstractAction;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileFilter;

/**
 * Allows you to browse the file system and forwards the file to the object that is waiting for you to choose a file.
 */
public class FileChooserAction extends AbstractAction {

    /**
     * A serial version UID.
     */
    private static final long serialVersionUID = 2225830878098387118L;
    /**
     * An object that is expecting the result of the file chooser action.
     */
    protected Observable observable;
    /**
     * A file filter to apply when browsing for a file.
     */
    protected FileFilter filter;
    /**
     * Indicates if you're browsing to create a new or an existing file.
     */
    protected boolean newFile;
    /**
     * The file that was chosen.
     */
    protected File file;

    /**
     * Creates a new file chooser action.
     *
     * @param observable the object waiting for you to select file
     * @param caption    a description for the action
     * @param filter     a filter to apply when browsing
     * @param newFile    indicates if you should browse for a new or existing file
     */
    public FileChooserAction(Observable observable, String caption, FileFilter filter, boolean newFile) {
        super(caption);
        this.observable = observable;
        this.filter = filter;
        this.newFile = newFile;
    }

    /**
     * Getter for the file.
     *
     * @return a file
     */
    public File getFile() {
        return file;
    }

    /**
     * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
     */
    public void actionPerformed(ActionEvent evt) {
        JFileChooser fc = new JFileChooser();
        if (filter != null) {
            fc.setFileFilter(filter);
        }
        int okCancel;
        if (newFile) {
            okCancel = fc.showSaveDialog(null);
        } else {
            okCancel = fc.showOpenDialog(null);
        }
        if (okCancel == JFileChooser.APPROVE_OPTION) {
            file = fc.getSelectedFile();
            observable.notifyObservers(this);
        }
    }

}