File: selectbox.js

// ===================================================================
// Author: Matt Kruse <matt@mattkruse.com>
// WWW: http://www.mattkruse.com/
//
// NOTICE: You may use this code for any purpose, commercial or
// private, without any further permission from the author. You may
// remove this notice from your final code if you wish, however it is
// appreciated by the author if at least my web site address is kept.
//
// You may *NOT* re-distribute this code in any way except through its
// use. That means, you can include it in your product, or your web
// site, or any other form where the code is actually being used. You
// may not put the plain javascript up on your site for download or
// include it in your javascript libraries for download. 
// If you wish to share this code with others, please just point them
// to the URL instead.
// Please DO NOT link directly to my .js files from your site. Copy
// the files to your server and use them there. Thank you.
// ===================================================================

// HISTORY
// ------------------------------------------------------------------
// April 20, 2005: Fixed the removeSelectedOptions() function to 
//                 correctly handle single selects
// June 12, 2003: Modified up and down functions to support more than
//                one selected option
/*
DESCRIPTION: These are general functions to deal with and manipulate
select boxes. Also see the OptionTransfer library to more easily 
handle transferring options between two lists

COMPATABILITY: These are fairly basic functions - they should work on
all browsers that support Javascript.
*/


// -------------------------------------------------------------------
// hasOptions(obj)
//  Utility function to determine if a select object has an options array
// -------------------------------------------------------------------


function removeOptionSelected(elSel)
{
	
  var i;
  for (i = elSel.length - 1; i>=0; i--) {
    if (elSel.options[i].selected) {
      elSel.remove(i);
    }
  }
}

function appendOptionLast(elSel, valor, texto)
{
  var elOptNew = document.createElement('option');
  elOptNew.text = valor;
  elOptNew.value = texto;

  try {
    elSel.add(elOptNew, null); // standards compliant; doesn't work in IE
  }
  catch(ex) {
    elSel.add(elOptNew); // IE only
  }
}





function hasOptions(obj) {
	if (obj!=null && obj.options!=null) { return true; }
	return false;
	}

// -------------------------------------------------------------------
// selectUnselectMatchingOptions(select_object,regex,select/unselect,true/false)
//  This is a general function used by the select functions below, to
//  avoid code duplication
// -------------------------------------------------------------------
function selectUnselectMatchingOptions(obj,regex,which,only) {
	if (window.RegExp) {
		if (which == "select") {
			var selected1=true;
			var selected2=false;
			}
		else if (which == "unselect") {
			var selected1=false;
			var selected2=true;
			}
		else {
			return;
			}
		var re = new RegExp(regex);
		if (!hasOptions(obj)) { return; }
		for (var i=0; i<obj.options.length; i++) {
			if (re.test(obj.options[i].text)) {
				obj.options[i].selected = selected1;
				}
			else {
				if (only == true) {
					obj.options[i].selected = selected2;
					}
				}
			}
		}
	}
		
// -------------------------------------------------------------------
// selectMatchingOptions(select_object,regex)
//  This function selects all options that match the regular expression
//  passed in. Currently-selected options will not be changed.
// -------------------------------------------------------------------
function selectMatchingOptions(obj,regex) {
	selectUnselectMatchingOptions(obj,regex,"select",false);
	}
// -------------------------------------------------------------------
// selectOnlyMatchingOptions(select_object,regex)
//  This function selects all options that match the regular expression
//  passed in. Selected options that don't match will be un-selected.
// -------------------------------------------------------------------
function selectOnlyMatchingOptions(obj,regex) {
	selectUnselectMatchingOptions(obj,regex,"select",true);
	}
// -------------------------------------------------------------------
// unSelectMatchingOptions(select_object,regex)
//  This function Unselects all options that match the regular expression
//  passed in. 
// -------------------------------------------------------------------
function unSelectMatchingOptions(obj,regex) {
	selectUnselectMatchingOptions(obj,regex,"unselect",false);
	}
	
// -------------------------------------------------------------------
// sortSelect(select_object)
//   Pass this function a SELECT object and the options will be sorted
//   by their text (display) values
// -------------------------------------------------------------------
function sortSelect(obj) {
	var o = new Array();
	if (!hasOptions(obj)) { return; }
	for (var i=0; i<obj.options.length; i++) {
		o[o.length] = new Option( obj.options[i].text, obj.options[i].value, obj.options[i].defaultSelected, obj.options[i].selected) ;
		}
	if (o.length==0) { return; }
	o = o.sort( 
		function(a,b) { 
			if ((a.text+"") < (b.text+"")) { return -1; }
			if ((a.text+"") > (b.text+"")) { return 1; }
			return 0;
			} 
		);

	for (var i=0; i<o.length; i++) {
		obj.options[i] = new Option(o[i].text, o[i].value, o[i].defaultSelected, o[i].selected);
		}
	}


function selectToHidden(obj, hd) {
	if (!hasOptions(obj)) { return; }
	for (var i=0; i<obj.options.length; i++) {
	   if ( i == 0 )
	        hd.value = 	obj.options[i].value;
		else
	        hd.value += ","+ obj.options[i].value;
		
		   
		}
	}
	


// -------------------------------------------------------------------
// selectAllOptions(select_object)
//  This function takes a select box and selects all options (in a 
//  multiple select object). This is used when passing values between
//  two select boxes. Select all options in the right box before 
//  submitting the form so the values will be sent to the server.
// -------------------------------------------------------------------
function selectAllOptions(obj) {
	if (!hasOptions(obj)) { return; }
	for (var i=0; i<obj.options.length; i++) {
		obj.options[i].selected = true;
		}
	}
	
function temOptGroup(sel, nome)
{
	
    var optgroups = sel.getElementsByTagName("optgroup");
	 for(var i = 0; i < optgroups.length; i++)
	  {	
			   var optgroup = optgroups[i];
		       var label = optgroup.label;
			   
			   if ( label == nome)
			       return optgroup;
	  }
	  
	  return null;
	
}
	
	
// -------------------------------------------------------------------
// moveSelectedOptions(select_object,select_object[,autosort(true/false)[,regex]])
//  This function moves options between select boxes. Works best with
//  multi-select boxes to create the common Windows control effect.
//  Passes all selected values from the first object to the second
//  object and re-sorts each box.
//  If a third argument of 'false' is passed, then the lists are not
//  sorted after the move.
//  If a fourth string argument is passed, this will function as a
//  Regular Expression to match against the TEXT or the options. If 
//  the text of an option matches the pattern, it will NOT be moved.
//  It will be treated as an unmoveable option.
//  You can also put this into the <SELECT> object as follows:
//    onDblClick="moveSelectedOptions(this,this.form.target)
//  This way, when the user double-clicks on a value in one box, it
//  will be transferred to the other (in browsers that support the 
//  onDblClick() event handler).
// -------------------------------------------------------------------
function moveSelectedOptions(from,to) {
	// Unselect matching options, if required
	//alert("to aqui");
	if ((from.selectedIndex==-1) && to.selectedIndex==-1)
		alert('Selecione pelo menos um item!');
	     
	
    var optgroups = from.getElementsByTagName("optgroup");
  // loop through the optgroup array
  
	if (arguments.length>3) {
		var regex = arguments[3];
		if (regex != "") {
			unSelectMatchingOptions(from,regex);
			}
		}
  
  // Move them over
	if (!hasOptions(from)) { return; }
  
  var contagrupo = 1;	
  var tem_group = false;
  if ( optgroups != null && optgroups.length > 0  )
  {
       contagrupo = optgroups.length;
       tem_group = true;
  }
  	
  for(var z = 0; z < contagrupo; z++)
  {	 
  
       var options = new Array();
        var optgroup = "";
        
       if (  optgroups != null && optgroups[z] != undefined){
            optgroup = optgroups[z];
	        options =     optgroup.getElementsByTagName("option"); 
	   
	   }else{
	       options =   from.getElementsByTagName("option");
	   }
   
	for (var i=0; i<options.length; i++) {
		var o = options[i];
		//alert( o.selected + " - " + o.text);
		if (o.selected) { 
			if (!hasOptions(to)) { var index = 0; } else { var index=to.options.length; }
		
		        //optiondestino = new Option( o.text, o.value, false, false);
			
				optiondestino=document.createElement("option");
				optiondestino.innerHTML = o.text;
				optiondestino.value = o.value;
			
			    
			    if ( tem_group ){
			        var optdestino = temOptGroup(to, optgroup.label);
			        var naotem = false;

  // alert( tem_group + " - " + contagrupo+" " +  options.length);
			        if ( optdestino == null ) 
			        {
				        naotem = true;
			           optdestino = document.createElement('optgroup');
	                   optdestino.label = optgroup.label;
			        }
			        optdestino.appendChild(optiondestino);
        			
			        if ( naotem ) 
			        {
				        //sortSelect(to); 
				        to.selectedIndex = -1;
			           to.appendChild(optdestino);
        			
			        }
			    }else{
			    
			    
				        to.selectedIndex = -1;
			           to.appendChild(optiondestino);
			    
			    }    
			//to.options[index]
			}
		}

  }
  
// Delete them from original
for (var i=(from.options.length-1); i>=0; i--) {
	var o = from.options[i];
	if (o.selected) {
		from.options[i] = null;
		}
	}
	
// Delete option groups	
if ( optgroups != null ){

                    var totopt =  optgroups.length;
                     for(var z = totopt - 1; z >= 0; z--)
                      {	 
                           var optgroup = optgroups[z];
	                       var options =     optgroup.getElementsByTagName("option"); 
  	                       if ( options.length == 0 )
	                        {
                               // alert( optgroups );
								try{
		   	                    optgroup.removeNode(true); }
								catch(exp){
								 from.removeChild( optgroup ); //chrome
								}
		                    }
                      }
	}
	
	if ((arguments.length<3) || (arguments[2]==true)) {
		//sortSelect(from);
		//sortSelect(to);
		}
	from.selectedIndex = -1;
	to.selectedIndex = -1;
	}

// -------------------------------------------------------------------
// copySelectedOptions(select_object,select_object[,autosort(true/false)])
//  This function copies options between select boxes instead of 
//  moving items. Duplicates in the target list are not allowed.
// -------------------------------------------------------------------
function copySelectedOptions(from,to) {
	var options = new Object();
	if (hasOptions(to)) {
		for (var i=0; i<to.options.length; i++) {
			options[to.options[i].value] = to.options[i].text;
			}
		}
	if (!hasOptions(from)) { return; }
	for (var i=0; i<from.options.length; i++) {
		var o = from.options[i];
		if (o.selected) {
			if (options[o.value] == null || options[o.value] == "undefined" || options[o.value]!=o.text) {
				if (!hasOptions(to)) { var index = 0; } else { var index=to.options.length; }
				to.options[index] = new Option( o.text, o.value, false, false);
				}
			}
		}
	if ((arguments.length<3) || (arguments[2]==true)) {
		sortSelect(to);
		}
	from.selectedIndex = -1;
	to.selectedIndex = -1;
	}

// -------------------------------------------------------------------
// moveAllOptions(select_object,select_object[,autosort(true/false)[,regex]])
//  Move all options from one select box to another.
// -------------------------------------------------------------------
function moveAllOptions(from,to) {
	selectAllOptions(from);
	if (arguments.length==2) {
		moveSelectedOptions(from,to);
		}
	else if (arguments.length==3) {
		moveSelectedOptions(from,to,arguments[2]);
		}
	else if (arguments.length==4) {
		moveSelectedOptions(from,to,arguments[2],arguments[3]);
		}
	}

// -------------------------------------------------------------------
// copyAllOptions(select_object,select_object[,autosort(true/false)])
//  Copy all options from one select box to another, instead of
//  removing items. Duplicates in the target list are not allowed.
// -------------------------------------------------------------------
function copyAllOptions(from,to) {
	selectAllOptions(from);
	if (arguments.length==2) {
		copySelectedOptions(from,to);
		}
	else if (arguments.length==3) {
		copySelectedOptions(from,to,arguments[2]);
		}
	}

// -------------------------------------------------------------------
// swapOptions(select_object,option1,option2)
//  Swap positions of two options in a select list
// -------------------------------------------------------------------
function swapOptions(obj,i,j) {
	var o = obj.options;
	var i_selected = o[i].selected;
	var j_selected = o[j].selected;
	var temp = new Option(o[i].text, o[i].value, o[i].defaultSelected, o[i].selected);
	var temp2= new Option(o[j].text, o[j].value, o[j].defaultSelected, o[j].selected);
	o[i] = temp2;
	o[j] = temp;
	o[i].selected = j_selected;
	o[j].selected = i_selected;
	}
	
// -------------------------------------------------------------------
// moveOptionUp(select_object)
//  Move selected option in a select list up one
// -------------------------------------------------------------------
function moveOptionUp(obj) {
	if (!hasOptions(obj)) { return; }
	for (i=0; i<obj.options.length; i++) {
		if (obj.options[i].selected) {
			if (i != 0 && !obj.options[i-1].selected) {
				swapOptions(obj,i,i-1);
				obj.options[i-1].selected = true;
				}
			}
		}
	}

// -------------------------------------------------------------------
// moveOptionDown(select_object)
//  Move selected option in a select list down one
// -------------------------------------------------------------------
function moveOptionDown(obj) {
	if (!hasOptions(obj)) { return; }
	for (i=obj.options.length-1; i>=0; i--) {
		if (obj.options[i].selected) {
			if (i != (obj.options.length-1) && ! obj.options[i+1].selected) {
				swapOptions(obj,i,i+1);
				obj.options[i+1].selected = true;
				}
			}
		}
	}

// -------------------------------------------------------------------
// removeSelectedOptions(select_object)
//  Remove all selected options from a list
//  (Thanks to Gene Ninestein)
// -------------------------------------------------------------------
function removeSelectedOptions(from) { 
	if (!hasOptions(from)) { return; }
	if (from.type=="select-one") {
		from.options[from.selectedIndex] = null;
		}
	else {
		for (var i=(from.options.length-1); i>=0; i--) { 
			var o=from.options[i]; 
			if (o.selected) { 
				from.options[i] = null; 
				} 
			}
		}
	from.selectedIndex = -1; 
	} 


// -------------------------------------------------------------------
// removeAllOptions(select_object)
//  Remove all options from a list
// -------------------------------------------------------------------
function removeAllOptions(from) { 
	if (!hasOptions(from)) { return; }
	for (var i=(from.options.length-1); i>=0; i--) { 
		from.options[i] = null; 
		} 
	from.selectedIndex = -1; 
	} 

// -------------------------------------------------------------------
// addOption(select_object,display_text,value,selected)
//  Add an option to a list
// -------------------------------------------------------------------
function addOption(obj,text,value,selected) {
	if (obj!=null && obj.options!=null) {
		obj.options[obj.options.length] = new Option(text, value, false, selected);
		}
	}


function getValuesFromSelect(cmb ){

   var saida = "";
     for ( var z = 0; z < cmb.options.length; z++){
	
	     if ( saida != "" )
		     saida +=",";
	    
		saida += cmb.options[z].value;
	}
     return saida;
}