/* Machine-made version of this file copyright (c) 2005 Somusar  */
/* Derived from samples that are
   Copyright (c) 2003, Nokia. All rights reserved */

package com.series60.examples.rms.shopping;

import javax.microedition.lcdui.*;
import javax.microedition.rms.*;
import java.io.*;

/**
 * UI to edit the details of a PlumbingShoppingItem.
 *
 * The implementation is discussed in the package documentation for
 * {@link com.series60.examples.rms.shopping} .
 *
 * @author  Nokia
 * @version 1
 */
public class PlumbingEditItemScreen extends Form {
    /** Maximum number of characters in each text field. */
    private static final int TEXT_FIELD_MAX_SIZE = 30;
    
    /** Reference to the parent midlet. */
    private PlumbingShoppingListMIDlet midlet;

    /** Graphical component. */
    private TextField itemName;
    /** Graphical component. */
    private TextField itemQuantity;

    /** The item being editted. */
    private PlumbingShoppingItem item;

    /**
     * Constructor.
     * After construction, a call to editItem() is expected before the EditItemScreen is displayed.
     *
     *@param midlet The parent ShoppingListMIDlet.
     */
    public PlumbingEditItemScreen(PlumbingShoppingListMIDlet midlet) {
        super("Plumbing list");
        this.midlet = midlet;

        itemQuantity = new TextField("Quantity", "", TEXT_FIELD_MAX_SIZE, TextField.NUMERIC);
        itemName = new TextField("Item", "", TEXT_FIELD_MAX_SIZE, TextField.ANY);
        
        append(itemQuantity);
        append(itemName);
        //the parent ShoppingListMIDlet acts as the CommandListener for
        //this component, and also handles adding the Commands.
    }

    /**
     * Starts editing an item.  Any changes will be saved to the item itself,
     * not a copy.
     *
     *@param item The item to edit;
     */
    public void editItem(PlumbingShoppingItem item) {
	int quantity = item.getQuantity();
        this.item = item;
        itemName.setString(item.getName());
	if (quantity > 0)
            itemQuantity.setString(""+quantity);
	else
            itemQuantity.setString("");
    }

    /**
     * Saves the details into the original item, and returns it.
     */
    public PlumbingShoppingItem saveChanges() {
        item.setDetails(itemName.getString(), Integer.parseInt(itemQuantity.getString()));
        return item;
    }
}