package e4s.tutorial;

import java.io.*;
import java.util.*;
import java.text.*;

import e4s.html.*;
import e4s.html.input.extended.*;
import e4s.translate.*;
import e4s.servlet.*;


/**
 * A simple class, that demonstrates the use of select fields in form elements. SELECT fields are based on the
 * E4SelectValues collection that holds - plain or structured - options for the selection. Special input behavior
 * enables entering values while selecting the drop-down (place focus on the city list and type some some characters). 
 *
 * {@tutorial Example_Input_Select}
 * 
 * @see e4s.html.IMG
 */
public class Example_Input_Select extends E4ModuleImplementation
{
	public static E4Method selectExample = null;
	public static E4Method selectExample_Save = null;

   
   public void selectExample( HTML html )
	{
		BODY body = html.BODY();
		
		body.Message(E4Message.CAPTION,"This example illustrates the usage of INPUT/SELECT");
		
		FORM form = body.FORM(selectExample_Save);
		
		E4SelectValues valuesA = new E4SelectValues();
		valuesA.addElement("NYC","New York");
		valuesA.addElement("Chicago","Chicago");
		valuesA.addElement("SF",new E4LabelApp("San Francisco"));
		valuesA.addElement("London");
		valuesA.addElement("Paris");
      valuesA.addElement("Vienna");
      valuesA.addElement("Rome");

		SELECT selectA = form.SELECT(new E4InputFieldName("A"),"Un-Grouped Selection",valuesA);
      // this allows user input even on select elements for faster location of an item
      selectA.setSpecialInputBehavior(form);
      
		E4SelectValues values_US = new E4SelectValues();
		values_US.addElement("NYC","New York");
		values_US.addElement("Chicago","Chicago");
		values_US.addElement("SF",new E4LabelApp("San Francisco"));
			
		E4SelectValues values_EU = new E4SelectValues();
		values_EU.addElement("London");
		values_EU.addElement("Paris");
			
		E4SelectValues valuesB = new E4SelectValues();
		valuesB.addOptionGroup("USA",values_US);
		valuesB.addOptionGroup("Europe",values_EU);
		
		SELECT selectB = form.SELECT(new E4InputFieldName("B"),"Grouped Selection",valuesB);
			
		form.FORM_Submit("Continue");
	}
	
	
	public void selectExample_Save( HTML html, E4CgiParams params )
	{
		params.toTable(html.TABLE());
		
		A href = html.A(selectExample);
		href.print("[do it again]");
	}      
	
	
}