sortlayerlistui.java

实现了一个基于j2me移动gps定位系统

/**
 * $Id: SortLayerListUI.java 257 2008-07-17 11:56:07Z khanh.lnq $
 * $URL: https://jvnmobilegis.googlecode.com/svn/trunk/src/org/javavietnam/gis/client/midp/ui/SortLayerListUI.java $
 * $Author: khanh.lnq $
 * $Revision: 257 $
 * $Date: 2008-07-17 18:56:07 +0700 (Thu, 17 Jul 2008) $
 *
 * ====================================================================
 *
 * Copyright (C) 2006-2007 by JVNGIS
 *
 * All copyright notices regarding JVNMobileGIS MUST remain
 * intact in the Java codes and resource files.
 *
 * This program 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
 * any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * Support can be obtained from project homepage at:
 * http://code.google.com/p/jvnmobilegis/
 *
 * Correspondence and Marketing Questions can be sent to:
 * khanh.lnq AT gmail.com
 *
 * @version: 1.0
 * @author: An Nguyen
 * @Date Created: 27 Dec 2007
 */
package org.javavietnam.gis.client.midp.ui;

import java.util.Vector;

import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.Ticker;

import org.javavietnam.gis.shared.midp.ApplicationException;

/**
 * @author anntv
 * 
 */
public class SortLayerListUI extends List implements CommandListener {

    private final UIController uiController;
    private final Command moveUpCommand;
    private final Command moveDownCommand;
    private final Command moveTopCommand;
    private final Command moveBottomCommand;
    private final Command getMapCommand;
    private Vector sortLayerList;
    private Ticker ticker;

    public SortLayerListUI(UIController uiController) {
        super(uiController.getString(UIConstants.LAYER_SORT), Choice.EXCLUSIVE);

        ticker = new Ticker(uiController
                .getString(UIConstants.SORT_LAYER_TICKER));
        setTicker(ticker);

        this.uiController = uiController;
        this.sortLayerList = uiController.getSelectedLayerList();

        getMapCommand = new Command(uiController.getString(UIConstants.GETMAP),
                Command.SCREEN, 0);
        moveTopCommand = new Command(uiController
                .getString(UIConstants.MOVE_TO_TOP), Command.SCREEN, 1);
        moveUpCommand = new Command(
                uiController.getString(UIConstants.MOVE_UP), Command.SCREEN, 2);
        moveDownCommand = new Command(uiController
                .getString(UIConstants.MOVE_DOWN), Command.SCREEN, 3);
        moveBottomCommand = new Command(uiController
                .getString(UIConstants.MOVE_TO_BOTTOM), Command.SCREEN, 4);

        addCommand(getMapCommand);
        addCommand(moveTopCommand);
        addCommand(moveUpCommand);
        addCommand(moveDownCommand);
        addCommand(moveBottomCommand);

        uiController.setCommands(this);

        setCommandListener(this);
    }

    public void init(Vector sortLayerList) throws ApplicationException {
        this.sortLayerList = sortLayerList;

        if (0 == sortLayerList.size()) {
            throw new ApplicationException(uiController
                    .getString(UIConstants.NO_SELECTED_LAYER));
        }

        deleteAll();
        for (int i = 0; i < sortLayerList.size(); i++) {
            append(sortLayerList.elementAt(i).toString(), null);
        }
    }

    /**
     * @return the sortLayerList
     */
    public Vector getSortLayerList() {
        return sortLayerList;
    }

    public void moveToTop() {
        if (getSelectedIndex() > 0) {
            int selectedIndex = getSelectedIndex();

            Object selectedItem = sortLayerList.elementAt(selectedIndex);
            sortLayerList.removeElementAt(selectedIndex);
            delete(selectedIndex);
            insert(0, selectedItem.toString(), null);
            sortLayerList.insertElementAt(selectedItem, 0);

            setSelectedIndex(0, true);
        }
    }

    public void moveUp() {
        int selectedIndex = getSelectedIndex();
        Object selectedItem = sortLayerList.elementAt(selectedIndex);

        if (selectedIndex > 0) {
            sortLayerList.removeElementAt(selectedIndex);
            delete(selectedIndex);

            insert(selectedIndex - 1, selectedItem.toString(), null);
            sortLayerList.insertElementAt(selectedItem, selectedIndex - 1);

            setSelectedIndex(selectedIndex - 1, true);
        } else {
            // Can't call moveToBottom() because we have to check condition with
            // moveToBottom()
            sortLayerList.removeElementAt(selectedIndex);
            delete(selectedIndex);

            sortLayerList.insertElementAt(selectedItem, sortLayerList.size());
            insert(sortLayerList.size() - 1, selectedItem.toString(), null);

            setSelectedIndex(sortLayerList.size() - 1, true);
        }
    }

    public void moveDown() {
        int selectedIndex = getSelectedIndex();
        Object selectedItem = sortLayerList.elementAt(selectedIndex);

        if (getSelectedIndex() < sortLayerList.size() - 1) {
            sortLayerList.removeElementAt(selectedIndex);
            delete(selectedIndex);

            sortLayerList.insertElementAt(selectedItem, selectedIndex + 1);
            insert(selectedIndex + 1, selectedItem.toString(), null);

            setSelectedIndex(selectedIndex + 1, true);
        } else {
            // Can't call moveToTop() because we have to check condition with
            // moveToTop()
            sortLayerList.removeElementAt(selectedIndex);
            delete(selectedIndex);

            sortLayerList.insertElementAt(selectedItem, 0);
            insert(0, selectedItem.toString(), null);

            setSelectedIndex(0, true);
        }
    }

    public void moveToBottom() {
        if (getSelectedIndex() < sortLayerList.size() - 1) {
            int selectedIndex = getSelectedIndex();

            Object selectedItem = sortLayerList.elementAt(selectedIndex);
            sortLayerList.removeElementAt(selectedIndex);
            delete(selectedIndex);
            sortLayerList.insertElementAt(selectedItem, sortLayerList.size());
            insert(sortLayerList.size() - 1, selectedItem.toString(), null);

            setSelectedIndex(sortLayerList.size() - 1, true);
        }
    }

    public void commandAction(Command command, Displayable displayable) {
        if (command == getMapCommand) {
            uiController.getMapRequested();
        } else if (command == moveTopCommand) {
            moveToTop();
        } else if (command == moveUpCommand) {
            moveUp();
        } else if (command == moveDownCommand) {
            moveDown();
        } else if (command == moveBottomCommand) {
            moveToBottom();
        } else {
            uiController.commandAction(command, displayable);
        }
    }
}