MessageBoxFixed.java

/*
    GNU General Public License
    CacheWolf is a software for PocketPC, Win and Linux that
    enables paperless caching.
    It supports the sites geocaching.com and opencaching.de

    Copyright (C) 2006  CacheWolf development team
	See http://www.cachewolf.de/ for more information.
    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; version 2 of the License.

    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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
package CacheWolf.utils;

/* $Id$ */
import ewe.sys.mThread;
import ewe.ui.MessageBox;

/**
 * this class can be needed, because ewe v1.49 cannot display messageBoxes in some special threads <br>
 * <br> but as of CacheWolf v1.0 this class is not used <br>
 * <br> It is included in order to have it available and to include the knowledge about ewe-threading problems, described in comments here <br>
 * This class is not mature -> make it mature<br>
 * or<br>
 * use it only when you get in the ewe-vm the exception:<br>
 *  ewe.sys Event Direction Exception:<br>
 *  This Task cannot be done within a timer tick <br>
 *  when you use the normal MessageBox<br>
 * @author pfeffer
 * 
 * FIXME: add javadoc!
 *
 */
public class MessageBoxFixed {
    private String title, text;
    private int type;
    private int ret;
    private boolean done;

    public MessageBoxFixed(final String title_, final String text_, final int type_) {
	set(title_, text_, type_);
    }

    public void set(final String title_, final String text_, final int type_) {
	title = title_;
	text = text_;
	type = type_;
    }

    public int execute() {
	final MBThread t = new MBThread(); // start a new thread is necessary because the simple ewe v1.49 threading model doesn't allow displaying of a messageBox in this kind of thread
	t.start();
	done = false;
	while (!done) {
	    try {
		mThread.sleep(100);
	    } catch (InterruptedException e) {
	    }
	}
	return ret;
    }

    class MBThread extends mThread {
	public MessageBox mb;

	public void run() {
	    mb = new MessageBox(title, text, type);
	    mb.show();
	    done = false;
	    mb.waitUntilClosed();
	    done = true;
	    // interrupt(); this doesn't work at all, neither in sun-vm nor in ewe-vm v1.49
	}
    }
}