//   6/22/09   M. Brenner

import javax.microedition.midlet.*;
import	javax.microedition.lcdui.*;

//////////////////////////////////////////////////////////////////////////
//												//
// NOTE: To add a new field to Bongoform you should:				//
//												//
//	1) add a constant (and String definition) to the list of		//
// static Strings.									//
//												//
//	2) add a default value to defaults[][] if it makes sense		//
// to have a default value.						//
//									//
//	3) define a private refrence variable to refer to an element	//
// of the appropriate type (ChoiceGroup, Guage or TextField)		//
//									//
//	4) adjust the constructor to add the field to the Bongoform	//
// in the approprate position in the form.				//
//									//
//	5) adjust updateprefs() to make sure the value provided by	//
// the user gets added to the Preferences object			//
//									//
//////////////////////////////////////////////////////////////////////////
public class Convertprefs
{
	// Field names (user sees these)
	static public final String	RATE = "RATE",
					DTOE = "DTOE";


	// Default values (user sees these)
	static public final String	defaults_[][] = {
						{RATE, "150"},
						{DTOE, "YES"}
					};
	private	ChoiceGroup	dtoe_;

	private ConvertGui	gui_;

	private Display 	display_;

	private Command		cancel_,
				save_;

	private Form		form_;

	private String		yesnotext[] = {"Dollars to Euros", "Euros to Dollars"};

	private TextField	convrate_;



	public
	Convertprefs (ConvertGui gui)
	{
		int		index;

		Preferences	prefs;

		String		value;


		gui_ = gui;

		form_ = new Form ("Convert Settings");
		form_.append ("Convert \u00A9 2009\nCP-Workshop");

		prefs = Preferences.getinstance();
		value = prefs.getpreference (RATE);
		convrate_ = new TextField ("Conversion Rate", value, 15, TextField.DECIMAL);
		form_.append (convrate_);
		
		index = prefs.getpreference (DTOE).equals ("YES")  ?  0 : 1;
		dtoe_ = new ChoiceGroup (get (DTOE), List.EXCLUSIVE, yesnotext, null);
		dtoe_.setSelectedIndex (index, true);
		form_.append (dtoe_);




		save_ = new Command ("Save", Command.OK, 0);
		form_.addCommand (save_);

		cancel_ = new Command ("Cancel", Command.CANCEL, 0);
		form_.addCommand (cancel_);

		form_.setCommandListener (new CommandListener() {
			public void commandAction (Command c, Displayable disp)
			{
				if (c == save_) {
					updateprefs();
				}

				gui_.changedprefs();
			}
		});
	}


	private String
	get (String msg)
	{
		return  get (msg, true);
	}


	private String
	get (String msg, boolean addcolon)
	{
		StringBuffer		text;


		text = new StringBuffer (msg);
		if (addcolon) {
			text.append (':');
		}

		return  text.toString();
	}


	public Form
	getform()
	{
		return  form_;
	}
	

	public void
	initialize()
	{
		Preferences	prefs;


		prefs = Preferences.getinstance();

		convrate_.setString (prefs.getpreference (RATE));
	}


	private void
	updateprefs()
	{
		Preferences	prefs;

		String		text;


		prefs = Preferences.getinstance();
		prefs.setpreference (RATE, convrate_.getString());

		text = dtoe_.getSelectedIndex() == 0  ?  "YES" : "NO";
		prefs.setpreference (DTOE, text);
	}
}