');
// cache elements
this.button = el.hide().after( html.join('') ).next('button');
this.menu = this.button.next('div.ui-multiselect-menu');
this.labels = this.menu.find('label');
this.buttonlabel = this.button.find('span').eq(-1);
// cache radios for single select
if( !o.multiple ){
this.radios = this.menu.find(":radio");
}
// set widths
this._setButtonWidth();
this._setMenuWidth();
// perform event bindings
this._bindEvents();
// update the number of selected elements when the page initially loads,
// and use that as the defaultValue. necessary for form resets when
// options are pre-selected.
this.button[0].defaultValue = this.update();
},
_init: function(){
if( !this.options.header ){
this.menu.find('div.ui-multiselect-header').hide();
}
if( this.options.autoOpen ){
this.open();
}
if( this.element.is(':disabled') ){
this.disable();
}
},
// binds events
_bindEvents: function(){
var self = this, button = this.button;
function clickHandler( e ){
self[ self._isOpen ? 'close' : 'open' ]();
return false;
}
// webkit doesn't like it when you click on the span :(
button.find('span').bind('click.multiselect', clickHandler);
// button events
button.bind({
click: clickHandler,
keypress: function(e){
switch(e.keyCode){
case 27: // esc
case 38: // up
case 37: // left
self.close();
break;
case 39: // right
case 40: // down
self.open();
break;
}
},
mouseenter: function(){
if(!button.hasClass('ui-state-disabled')){
$(this).addClass('ui-state-hover');
}
},
mouseleave: function(){
$(this).removeClass('ui-state-hover');
},
focus: function(){
if(!button.hasClass('ui-state-disabled')){
$(this).addClass('ui-state-focus');
}
},
blur: function(){
$(this).removeClass('ui-state-focus');
}
});
// header links
this.menu.find('div.ui-multiselect-header a').bind('click.multiselect', function(e){
// close link
if( $(this).hasClass('ui-multiselect-close') ){
self.close();
// check all / uncheck all
} else {
self[ $(this).hasClass('ui-multiselect-all') ? 'checkAll' : 'uncheckAll' ]();
}
e.preventDefault();
})
// optgroup label toggle support
.end()
.find('li.ui-multiselect-optgroup-label a').bind('click.multiselect', function(e){
var $this = $(this),
$inputs = $this.parent().nextUntil('li.ui-multiselect-optgroup-label').find('input:visible');
self._toggleChecked( $inputs.filter(':checked').length !== $inputs.length, $inputs );
self._trigger('optgrouptoggle', e, {
inputs: $inputs.get(),
label: $this.parent().text(),
checked: $inputs[0].checked
});
e.preventDefault();
})
// labels/checkbox events
.end()
.delegate('label', 'mouseenter', function(){
if( !$(this).hasClass('ui-state-disabled') ){
self.labels.removeClass('ui-state-hover');
$(this).addClass('ui-state-hover').find('input').focus();
}
})
.delegate('label', 'keydown', function(e){
switch(e.keyCode){
case 9: // tab
case 27: // esc
self.close();
break;
case 38: // up
case 40: // down
case 37: // left
case 39: // right
self._traverse(e.keyCode, this);
break;
case 13: // enter
e.preventDefault();
$(this).find('input').trigger('click');
break;
}
})
.delegate(':checkbox, :radio', 'click', function(e){
var $this = $(this),
val = this.value,
checked = this.checked;
// bail if this input is disabled or the event is cancelled
if( $this.is(':disabled') || self._trigger('click', e, { value:this.value, text:this.title, checked:checked }) === false ){
e.preventDefault();
return;
}
// inputs don't have a name attr so they won't be submitted
// in the form. for single select, handle functionality
if( !self.options.multiple ){
self.radios.not(this).removeAttr('checked');
}
// set the original option tag to selected
self.element.find('option').filter(function(){
return this.value === val;
}).attr('selected', (checked ? 'selected' : ''));
// issue 14: if this event is natively fired, the box will be checked
// before running the update. using trigger(), the events fire BEFORE
// the box is checked. http://dev.jquery.com/ticket/3827
self.update( !e.originalEvent ? checked ? -1 : 1 : 0 );
});
// close each widget when clicking on any other element/anywhere else on the page
$(document).bind('click.multiselect', function(e){
var $target = $(e.target);
if(self._isOpen && !$target.closest('div.ui-multiselect-menu').length && !$target.is('button.ui-multiselect')){
self.close();
}
});
},
// set button width
_setButtonWidth: function(){
var width = this.element.outerWidth(),
o = this.options;
if( /\d/.test(o.minWidth) && width < o.minWidth){
width = o.minWidth;
}
// set widths
this.button.width( width );
},
// set menu width
_setMenuWidth: function () {
var m = this.menu,
width = this.button.outerWidth()
-parseInt(m.css('padding-left'),10)
-parseInt(m.css('padding-right'),10)
-parseInt(m.css('border-right-width'),10)
-parseInt(m.css('border-left-width'),10);
// NHA Edit: Fixes width bug in IE+ chrome
if (isNaN)
width = -1;
m.width( width || this.button.outerWidth() );
},
// move up or down within the menu
_traverse: function(keycode, start){
var $start = $(start),
moveToLast = (keycode === 38 || keycode === 37) ? true : false,
// select the first li that isn't an optgroup label / disabled
$next = $start.parent()[moveToLast ? 'prevAll' : 'nextAll']('li:not(.ui-multiselect-disabled, .ui-multiselect-optgroup-label)')[ moveToLast ? 'last' : 'first']();
// if at the first/last element
if( !$next.length ){
var $container = this.menu.find('ul:last');
// move to the first/last
this.menu.find('label')[ moveToLast ? 'last' : 'first' ]().trigger('mouseover');
// set scroll position
$container.scrollTop( moveToLast ? $container.height() : 0 );
} else {
$next.find('label').trigger('mouseover');
}
},
_toggleChecked: function(flag, group){
var $inputs = (group && group.length)
? group
: this.labels.find('input');
// reduce set to first input if single select and checkAll
if( !this.options.multiple && flag ){
$inputs = $inputs.eq(0);
}
// toggle state on inputs
$inputs.not(':disabled').attr('checked', (flag ? 'checked' : ''));
this.update();
// toggle state on original option tags
this.element.find('option').not(':disabled').attr('selected', (flag ? 'selected' : ''));
},
_toggleDisabled: function(flag){
this.button.attr('disabled', (flag ? 'disabled' : ''))[ flag ? 'addClass' : 'removeClass' ]('ui-state-disabled');
this.menu.find('input').attr('disabled', (flag ? 'disabled' : '')).parent()[ flag ? 'addClass' : 'removeClass' ]('ui-state-disabled');
this.element.attr('disabled', (flag ? 'disabled' : ''));
},
// updates the number of selected items in the button
update: function( offset ){
var o = this.options,
$inputs = this.labels.find('input'),
$checked = $inputs.filter(':checked'),
numChecked = $checked.length,
value;
if( numChecked === 0 ){
value = o.noneSelectedText;
} else {
if($.isFunction(o.selectedText)){
value = o.selectedText.call(this, numChecked, $inputs.length, $checked.get());
} else if( /\d/.test(o.selectedList) && o.selectedList > 0 && numChecked <= o.selectedList){
value = $checked.map(function(){ return this.title; }).get().join(', ');
} else {
value = o.selectedText.replace('#', numChecked).replace('#', $inputs.length);
}
}
this.buttonlabel.html( value );
return value;
},
// open the menu
open: function(e){
var self = this,
button = this.button,
menu = this.menu,
speed = this.speed,
o = this.options;
// bail if the multiselectopen event returns false, this widget is disabled, or is already open
if( this._trigger('beforeopen') === false || button.hasClass('ui-state-disabled') || this._isOpen ){
return;
}
// close other instances
$(':ech-multiselect').not(this.element).each(function(){
var $this = $(this);
if( $this.multiselect('isOpen') ){
$this.multiselect('close');
}
});
var $container = menu.find('ul:last'),
effect = o.show,
pos = button.position();
// figure out opening effects/speeds
if( $.isArray(o.show) ){
effect = o.show[0];
speed = o.show[1] || self.speed;
}
// set the scroll of the checkbox container
$container.scrollTop(0).height(o.height);
// position and show menu
if( $.ui.position && !$.isEmptyObject(o.position) ){
o.position.of = o.position.of || button;
menu
.show()
.position( o.position )
.hide()
.show( effect, speed );
// if position utility is not available...
} else {
menu.css({
top: pos.top+button.outerHeight(),
left: pos.left
}).show( effect, speed );
}
// select the first option
// triggering both mouseover and mouseover because 1.4.2+ has a bug where triggering mouseover
// will actually trigger mouseenter. the mouseenter trigger is there for when it's eventually fixed
this.labels.eq(0).trigger('mouseover').trigger('mouseenter').find('input').trigger('focus');
button.addClass('ui-state-active');
this._isOpen = true;
this._trigger('open');
},
// close the menu
close: function(){
if(this._trigger('beforeclose') === false){
return;
}
var self = this, o = this.options, effect = o.hide, speed = this.speed;
// figure out opening effects/speeds
if( $.isArray(o.hide) ){
effect = o.hide[0];
speed = o.hide[1] || this.speed;
}
this.menu.hide(effect, speed);
this.button.removeClass('ui-state-active').trigger('blur').trigger('mouseleave');
this._trigger('close');
this._isOpen = false;
},
enable: function(){
this._toggleDisabled(false);
},
disable: function(){
this._toggleDisabled(true);
},
checkAll: function(e){
this._toggleChecked(true);
this._trigger('checkAll');
},
uncheckAll: function(){
this._toggleChecked(false);
this._trigger('uncheckAll');
},
getChecked: function(){
return this.menu.find('input').filter(':checked');
},
destroy: function(){
// remove classes + data
$.Widget.prototype.destroy.call( this );
this.button.remove();
this.menu.remove();
this.element.show();
return this;
},
isOpen: function(){
return this._isOpen;
},
widget: function(){
return this.menu;
},
// react to option changes after initialization
_setOption: function( key, value ){
var menu = this.menu;
switch(key){
case "header":
menu.find('div.ui-multiselect-header')[ value ? 'show' : 'hide' ]();
break;
case "checkAllText":
menu.find('a.ui-multiselect-all span').eq(-1).text(value);
break;
case "uncheckAllText":
menu.find('a.ui-multiselect-none span').eq(-1).text(value);
break;
case "height":
menu.find('ul:last').height( parseInt(value,10) );
break;
case "minWidth":
this.options[ key ] = parseInt(value,10);
this._setButtonWidth();
this._setMenuWidth();
break;
case "selectedText":
case "selectedList":
case "noneSelectedText":
this.options[key] = value; // these all needs to update immediately for the update() call
this.update();
break;
case "classes":
menu.add(this.button).removeClass(this.options.classes).addClass(value);
break;
}
$.Widget.prototype._setOption.apply( this, arguments );
}
});
})(jQuery);