package awtExtExamples ;
/*
 *
 * Copyright (c) 1995 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */

import java.awt.Panel;
import java.awt.Event;
import java.awt.TextField;

import awtExt.*;
import sysExt.*;

/**
 * A test of an awtExt.List controlled via user defined methods.
 * The list has 2 callback methods registered in its eventDispatch object.
 * Each button on the bottom of the window allows you to add, delete, clear, 
 * select, deselect items. Each one of these
 * buttons invokes a user registered method. An awtExt.Checkbox
 * controls the list's single/multiple selection mechanism.
 * 
 */
public class ListTest extends Frame {
    awtExt.List list;
    TextField text;

    public ListTest() {
	super("ListTest");

	list = new awtExt.List();
	try {
	
	list.addItem("one");
	list.addItem("two");
	list.addItem("three");
	list.addItem("four");
	list.addItem("five");
	list.addItem("six");
	list.addItem("seven");
	list.addItem("eight");
	list.addItem("nine");
	list.addItem("ten");

	/*
	** Add two event handlers to the list object. One for the LIST_SELECT event,
	** and one for the LIST_DESELECT event.
	*/
	list.eventDispatch.LIST_SELECT   = Callback.newRef( this, "listSelect" );
	list.eventDispatch.LIST_DESELECT = Callback.newRef( this, "listDeselect" );
	add("Center", list);

	Panel p = new Panel();
	p.add(text=new TextField(20));

	p.add(new Checkbox("multiple",this, "multiple"));
	

	p.add(new Button("add",		this, "add"));
	p.add(new Button("del",		this, "delete" ) );
	p.add(new Button("clear",	this, "clear" ) );
	p.add(new Button("select",	this, "select" ) );
	p.add(new Button("deselect",	this, "deselect" ));
	p.add(new Button("print",	this, "print"));

	add("South", p);

	move(400, 200);
	show();
	} catch( Exception e ) { e.printStackTrace();} ;
    }
    /**
    * Called back method from List. Invoked when LIST_SELECT event occurs 
    **/
    public void listSelect( CallbackInfo cbi ) {
	    System.out.println(" List select callback: " + ((Integer)cbi.evt.arg).intValue());
    }


    /**
    * Called back method from  List. Invoked when LIST_DESELECT event occurs  
    **/
    public void listDeselect( CallbackInfo cbi ) {
	System.out.println("List deselect callback: " + ((Integer)cbi.evt.arg).intValue());
    }

   

    /**
    * Called back method from Checkbox 
    **/
    public void multiple( CallbackInfo cbi ) {
	list.setMultipleSelections(((Boolean)cbi.evt.arg).booleanValue());
    }


    /**
    * Called back method from button
    **/
    public void print ( CallbackInfo cbi ) {
		System.out.println("-- list contents --");
		int n = list.countItems();
		for (int i=0; i < n; i++) {
		    System.out.println(list.getItem(i));
		}
		System.out.println("-- list selected --");		
		String sel[] = list.getSelectedItems();
		for (int i = 0 ; i < sel.length ; i++) {
		    System.out.println(sel[i]);
		}
    }



    /**
    * Called back method from button
    **/
    public void add( CallbackInfo cbi ) {
	list.addItem(text.getText());
    }

 
    /**
    * Called back method from button
    **/
    public void delete( CallbackInfo cbi ) {
      int index = argToIndex(text.getText());

      if (index == -1) {
		System.out.println("Invalid index");
      } else {
		list.delItem(index);
      }
    }


    /**
    * Called back method from button
    **/
    public void select( CallbackInfo cbi ) {
	int index = argToIndex(text.getText());

	if (index == -1) {
	    System.out.println("Invalid index");
	} else {
	    list.select(index);
	}
    }

    /**
    * Called back method from button
    **/
    public void deselect( CallbackInfo cbi ) {
	int index = argToIndex(text.getText());

	if (index == -1) {
	    System.out.println("Invalid index");
	} else {
	    list.deselect(index);
	}
    }


    /**
    * Called back method from button
    **/
    public void clear( CallbackInfo cbi) {
		list.clear();
    }



    int argToIndex(String arg) {
	int n = list.countItems();

	for (int i = 0; i < n; i++) {
	    if (arg.equals(list.getItem(i))) {
		return i;
	    }
	}
	return -1;
    }
 

    public static void main(String args[]) {
	new ListTest();
    }
}