');
optgroups.push( optLabel );
}
}
if( isDisabled ){
labelClasses.push('ui-state-disabled');
}
// browsers automatically select the first option
// by default with single selects
if( isSelected && !o.multiple ){
labelClasses.push('ui-state-active');
}
html.push('
');
// create the label
html.push('
');
});
// insert into the DOM
checkboxContainer.html( html.join('') );
// cache some moar useful elements
this.labels = menu.find('label');
// set widths
this._setButtonWidth();
this._setMenuWidth();
// remember default value
this.button[0].defaultValue = this.update();
// broadcast refresh event; useful for widgets
if( !init ){
this._trigger('refresh');
}
},
// updates the button text. call refresh() to rebuild
update: function(){
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;
},
// binds events
_bindEvents: function(){
var self = this, button = this.button;
function clickHandler(){
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.which){
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.header
.delegate('a', '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
this.menu
.delegate('li.ui-multiselect-optgroup-label a', 'click.multiselect', function(e){
e.preventDefault();
var $this = $(this),
$inputs = $this.parent().nextUntil('li.ui-multiselect-optgroup-label').find('input:visible:not(:disabled)'),
nodes = $inputs.get(),
label = $this.parent().text();
// trigger event and bail if the return is false
if( self._trigger('beforeoptgrouptoggle', e, { inputs:nodes, label:label }) === false ){
return;
}
// toggle inputs
self._toggleChecked(
$inputs.filter(':checked').length !== $inputs.length,
$inputs
);
self._trigger('optgrouptoggle', e, {
inputs: nodes,
label: label,
checked: nodes[0].checked
});
})
.delegate('label', 'mouseenter.multiselect', function(){
if( !$(this).hasClass('ui-state-disabled') ){
self.labels.removeClass('ui-state-hover');
$(this).addClass('ui-state-hover').find('input').focus();
}
})
.delegate('label', 'keydown.multiselect', function(e){
e.preventDefault();
switch(e.which){
case 9: // tab
case 27: // esc
self.close();
break;
case 38: // up
case 40: // down
case 37: // left
case 39: // right
self._traverse(e.which, this);
break;
case 13: // enter
$(this).find('input')[0].click();
break;
}
})
.delegate('input[type="checkbox"], input[type="radio"]', 'click.multiselect', function(e){
var $this = $(this),
val = this.value,
checked = this.checked,
tags = self.element.find('option');
// bail if this input is disabled or the event is cancelled
if( this.disabled || self._trigger('click', e, { value:val, text:this.title, checked:checked }) === false ){
e.preventDefault();
return;
}
// toggle aria state
$this.attr('aria-selected', checked);
// set the original option tag to selected
tags.each(function(){
if( this.value === val ){
this.selected = checked;
// deselect all others in a single select
} else if( !self.options.multiple ){
this.selected = false;
}
});
// some additional single select-specific logic
if( !self.options.multiple ){
self.labels.removeClass('ui-state-active');
$this.closest('label').toggleClass('ui-state-active', checked );
// close menu
self.close();
}
// setTimeout is to fix multiselect issue #14 and #47. caused by jQuery issue #3827
// http://bugs.jquery.com/ticket/3827
setTimeout($.proxy(self.update, self), 10);
});
// close each widget when clicking on any other element/anywhere else on the page
$(document).bind('mousedown.multiselect', function(e){
if(self._isOpen && !$.contains(self.menu[0], e.target) && !$.contains(self.button[0], e.target) && e.target !== self.button[0]){
self.close();
}
});
// deal with form resets. the problem here is that buttons aren't
// restored to their defaultValue prop on form reset, and the reset
// handler fires before the form is actually reset. delaying it a bit
// gives the form inputs time to clear.
$(this.element[0].form).bind('reset.multiselect', function(){
setTimeout(function(){ self.update(); }, 10);
});
},
// 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);
m.width( width || this.button.outerWidth() );
},
// move up or down within the menu
_traverse: function(which, start){
var $start = $(start),
moveToLast = which === 38 || which === 37,
// 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');
}
},
// This is an internal function to toggle the checked property and
// other related attributes of a checkbox.
//
// The context of this function should be a checkbox; do not proxy it.
_toggleCheckbox: function( prop, flag ){
return function(){
!this.disabled && (this[ prop ] = flag);
if( flag ){
this.setAttribute('aria-selected', true);
} else {
this.removeAttribute('aria-selected');
}
}
},
_toggleChecked: function(flag, group){
var $inputs = (group && group.length) ?
group :
this.labels.find('input'),
self = this;
// toggle state on inputs
$inputs.each(this._toggleCheckbox('checked', flag));
// update button text
this.update();
// gather an array of the values that actually changed
var values = $inputs.map(function(){
return this.value;
}).get();
// toggle state on original option tags
this.element
.find('option')
.each(function(){
if( !this.disabled && $.inArray(this.value, values) > -1 ){
self._toggleCheckbox('selected', flag).call( this );
}
});
},
_toggleDisabled: function( flag ){
this.button
.attr({ 'disabled':flag, 'aria-disabled':flag })[ flag ? 'addClass' : 'removeClass' ]('ui-state-disabled');
this.menu
.find('input')
.attr({ 'disabled':flag, 'aria-disabled':flag })
.parent()[ flag ? 'addClass' : 'removeClass' ]('ui-state-disabled');
this.element
.attr({ 'disabled':flag, 'aria-disabled':flag });
},
// 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;
}
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 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._isOpen = false;
this._trigger('close');
},
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);