/*******************************************************************************
 * Copyright (c) 2006 Elphel, Inc and Excelsior, LLC.
 * This file is a part of Eclipse/VDT plug-in.
 * Eclipse/VDT plug-in is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * Eclipse/VDT plug-in 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with Eclipse VDT plug-in; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *******************************************************************************/
package com.elphel.vdt.ui.dialogs;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

/**
 * Model of list of string entries. 
 * 
 * Created: 08.01.2006
 * @author  Lvov Konstantin
 */

public class ListPromptModel {

    private List<Entry> entries = new ArrayList<Entry>();
    private List<Listener> listeners = new ArrayList<Listener>();
    
    public ListPromptModel() {}

    public ListPromptModel(List<String> initialValues) {
    	if (initialValues != null) {
            for (Iterator i = initialValues.iterator(); i.hasNext(); ) {
            	String value = (String)i.next();
            	addEntry(value);
            }
    	}
    }
	
    public List<String> getList() {
    	List<String> list = new ArrayList<String>(entries.size());
        for (Iterator i = entries.iterator(); i.hasNext(); ) {
        	Entry entry = (Entry)i.next();
        	list.add(entry.getValue());
        }
        return list;
    }

    public List<Entry> getEntries() {
        return entries;
    }
    
    /**
     *  Add a new list entry 
     */
    public void addEntry(String value) {
        Entry entry = new Entry(value);
        entries.add(entry);
        for (int i = 0; i < listeners.size(); i++)
            ((Listener)listeners.get(i)).entryAdded(entry);
    }
    
    /**
     * Remove specified list entry
     */
    public void removeEntry(Entry entry) {
        entries.remove(entry);
        for (int i = 0; i < listeners.size(); i++)
            ((Listener)listeners.get(i)).entryRemoved(entry);
    }
    
    /**
     * Notify listener of changes of specified list entry
     */
    public void updateEntry(Entry entry) {
        for (int i = 0; i < listeners.size(); i++)
            ((Listener)listeners.get(i)).entryChanged(entry);
    }
        
    public void moveUpEntry(Entry entry) {
        int position = entries.indexOf(entry);
        if (position > 0) {
            removeEntry(entry);
            position--;
            entries.add(position, entry);
            for (int i = 0; i < listeners.size(); i++)
                ((Listener)listeners.get(i)).entryInserted(entry, position);
        }
    } // moveUpPort()
    
    public void moveDownEntry(Entry entry) {
        int position = entries.indexOf(entry);
        if ((position >= 0) && (position != entries.size()-1)) {
            removeEntry(entry);
            position++;
            entries.add(position, entry);
            for (int i = 0; i < listeners.size(); i++)
                ((Listener)listeners.get(i)).entryInserted(entry, position);
        }
    } // moveDownPort()
    
    public void addListener(Listener l) {
        listeners.add(l);
    }

    public void removeListener(Listener l) {
        listeners.remove(l);
    }

    public void removeAllListener() {
        listeners.clear();
    }
        
    public interface Listener {
        public void entryAdded(Entry entry);
        public void entryRemoved(Entry entry);
        public void entryChanged(Entry entry);
        public void entryInserted(Entry entry, int position);
    } // interface Listener
	
    //-------------------------------------------------------------------------
    //                         list promt entry
	//-------------------------------------------------------------------------
	class Entry {
	    private String value;
	    
	    public Entry(String value) {
	    	this.value = value;
	    }
	    
	    public void setValue(String value) {
	    	this.value = value;
	    }

	    public String getValue() {
	    	return value;
	    }
	    
	    public String toString() {
	    	return value;
	    }
	} // class Entry
	
} // class ListPromptModel