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function ComboBox_InitWith(n) {
if ( typeof( window.addEventListener ) != "undefined" ) {
window.addEventListener("load", ComboBox_Init(n), false);
} else if ( typeof( window.attachEvent ) != "undefined" ) {
window.attachEvent("onload", ComboBox_Init(n));
} else {
ComboBox_Init(n)();
}
}
function ComboBox_Init(n) {
return function () {
if ( ComboBox_UplevelBrowser( n ) ) {
ComboBox_Load( n );
}
}
}
function ComboBox_UplevelBrowser( n ) {
if( typeof( document.getElementById ) == "undefined" ) return false;
var combo = document.getElementById( n + "_Container" );
if( combo == null || typeof( combo ) == "undefined" ) return false;
if( typeof( combo.style ) == "undefined" ) return false;
if( typeof( combo.innerHTML ) == "undefined" ) return false;
return true;
}
function ComboBox_Load( comboId ) {
var combo = document.getElementById( comboId + "_Container" );
var button = document.getElementById( comboId + "_Button" );
var list = document.getElementById( comboId + "_List" );
var text = document.getElementById( comboId );
combo.List = list;
combo.Button = button;
combo.Text = text;
button.Container = combo;
button.Toggle = ComboBox_ToggleList;
button.onclick = button.Toggle;
button.onmouseover = function(e) { this.Container.List.DisableBlur(e); };
button.onmouseout = function(e) { this.Container.List.EnableBlur(e); };
button.onselectstart = function(e){ return false; };
button.style.height = ( list.offsetHeight - 4 ) + "px";
text.Container = combo;
text.TypeDown = ComboBox_TextTypeDown;
text.KeyAccess = ComboBox_TextKeyAccess;
text.onkeyup = function(e) { this.KeyAccess(e); this.TypeDown(e); };
list.Container = combo;
list.Show = ComboBox_ShowList;
list.Hide = ComboBox_HideList;
list.EnableBlur = ComboBox_ListEnableBlur;
list.DisableBlur = ComboBox_ListDisableBlur;
list.Select = ComboBox_ListItemSelect;
list.ClearSelection = ComboBox_ListClearSelection;
list.KeyAccess = ComboBox_ListKeyAccess;
list.FireTextChange = ComboBox_ListFireTextChange;
list.onchange = null;
list.onclick = function(e){ this.Select(e); this.ClearSelection(); this.FireTextChange(); };
list.onkeyup = function(e) { this.KeyAccess(e); };
list.EnableBlur(null);
list.style.position = "absolute";
list.size = ComboBox_GetListSize( list );
list.IsShowing = true;
list.Hide();
}
function ComboBox_InitEvent( e ) {
if( typeof( e ) == "undefined" && typeof( window.event ) != "undefined" ) e = window.event;
if( e == null ) e = new Object();
return e;
}
function ComboBox_ListClearSelection() {
if ( typeof( this.Container.Text.createTextRange ) == "undefined" ) return;
var rNew = this.Container.Text.createTextRange();
rNew.moveStart('character', this.Container.Text.value.length) ;
rNew.select();
}
function ComboBox_GetListSize( theList ) {
ComboBox_EnsureListSize( theList );
return theList.listSize;
}
function ComboBox_EnsureListSize( theList ) {
if ( typeof( theList.listSize ) == "undefined" ) {
if( typeof( theList.getAttribute ) != "undefined" ) {
if( theList.getAttribute( "size" ) != null && theList.getAttribute( "size" ) != "" ) {
theList.listSize = theList.getAttribute( "size" );
return;
}
}
if( theList.options.length > 0 ) {
theList.listSize = theList.options.length;
return;
}
theList.listSize = 4;
}
}
function ComboBox_ListKeyAccess(e) { //Make enter/space and escape do the right thing :)
e = ComboBox_InitEvent( e );
if( e.keyCode == 13 || e.keyCode == 32 ) {
this.Select();
return;
}
if( e.keyCode == 27 ) {
this.Hide();
this.Container.Text.focus();
return;
}
}
function ComboBox_TextKeyAccess(e) { //Make alt+arrow expand the list
e = ComboBox_InitEvent( e );
if( e.altKey && (e.keyCode == 38 || e.keyCode == 40) ) {
this.Container.List.Show();
}
}
function ComboBox_TextTypeDown(e) { //Make the textbox do a type-down on the list
e = ComboBox_InitEvent( e );
var items = this.Container.List.options;
if( this.value == "" ) return;
var ctrlKeys = Array( 8, 46, 37, 38, 39, 40, 33, 34, 35, 36, 45, 16, 20 );
for( var i = 0; i < ctrlKeys.length; i++ ) {
if( e.keyCode == ctrlKeys[i] ) return;
}
for( var i = 0; i < items.length; i++ ) {
var item = items[i];
if( item.text.toLowerCase().indexOf( this.value.toLowerCase() ) == 0 ) {
this.Container.List.selectedIndex = i;
if ( typeof( this.Container.Text.createTextRange ) != "undefined" ) {
this.Container.List.Select();
}
break;
}
}
}
function ComboBox_ListFireTextChange() {
var textOnChange = this.Container.Text.onchange;
if ( textOnChange != null && typeof(textOnChange) == "function" ) {
textOnChange();
}
}
function ComboBox_ListEnableBlur(e) {
this.onblur = this.Hide;
}
function ComboBox_ListDisableBlur(e) {
this.onblur = null;
}
function ComboBox_ListItemSelect(e) {
if( this.options.length > 0 ) {
var text = this.Container.Text;
var oldValue = text.value;
var newValue = this.options[ this.selectedIndex ].text;
text.value = newValue;
if ( typeof( text.createTextRange ) != "undefined" ) {
if (newValue != oldValue) {
var rNew = text.createTextRange();
rNew.moveStart('character', oldValue.length) ;
rNew.select();
}
}
}
this.Hide();
this.Container.Text.focus();
}
function ComboBox_ToggleList(e) {
if( this.Container.List.IsShowing == true ) {
this.Container.List.Hide();
} else {
this.Container.List.Show();
}
}
function ComboBox_ShowList(e) {
if ( !this.IsShowing && !this.disabled ) {
this.style.top = '1.2em';//( this.Container.offsetHeight + ComboBox_RecursiveOffsetTop(this.Container,true) ) + "px";
this.style.left = '0px';// ( ComboBox_RecursiveOffsetLeft(this.Container,true) + 1 ) + "px";
ComboBox_SetVisibility(this,true);
this.focus();
this.IsShowing = true;
}
}
function ComboBox_HideList(e) {
if( this.IsShowing ) {
ComboBox_SetVisibility(this,false);
this.IsShowing = false;
}
}
function ComboBox_SetVisibility(theList, isVisible) {
setVisibility(theList, isVisible);
}
function ComboBox_RecursiveOffsetTop(thisObject,isFirst) {
if(thisObject.offsetParent) {
if ( thisObject.style.position == "absolute" && !isFirst && typeof(document.designMode) != "undefined" ) {
return 0;
}
return (thisObject.offsetTop + ComboBox_RecursiveOffsetTop(thisObject.offsetParent,false));
} else {
return thisObject.offsetTop;
}
}
function ComboBox_RecursiveOffsetLeft(thisObject,isFirst) {
if(thisObject.offsetParent) {
if ( thisObject.style.position == "absolute" && !isFirst && typeof(document.designMode) != "undefined" ) {
return 0;
}
return (thisObject.offsetLeft + ComboBox_RecursiveOffsetLeft(thisObject.offsetParent,false));
} else {
return thisObject.offsetLeft;
}
}
function ComboBox_SimpleAttach(selectElement,textElement) {
textElement.value = selectElement.options[ selectElement.options.selectedIndex ].text;
var textOnChange = textElement.onchange;
if ( textOnChange != null && typeof( textOnChange ) == "function" ) {
textOnChange();
}
}
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