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/**
* @author zhixin wen <wenzhixin2010@gmail.com>
* @version 1.0.3
*
* http://wenzhixin.net.cn/p/multiple-select/
*/
(function($) {
'use strict';
function MultipleSelect($el, options) {
var that = this;
this.$el = $el.hide();
this.options = options;
this.$parent = $('<div class="ms-parent"></div>');
this.$choice = $('<div class="ms-choice"><span class="placeholder">' +
options.placeholder + '</span><div></div></div>');
this.$drop = $('<div class="ms-drop"></div>');
this.$el.after(this.$parent);
this.$parent.append(this.$choice);
this.$parent.append(this.$drop);
if (this.$el.prop('disabled')) {
this.$choice.addClass('disabled');
}
this.$choice.css('width', $el.width() + 'px')
.find('span').css('width', ($el.width() - 28) + 'px');
this.$drop.css({
width: $el.width() + 'px'
});
$('body').click(function(e) {
if ($(e.target)[0] === that.$choice[0] ||
$(e.target).parents('.ms-choice')[0] === that.$choice[0]) {
return;
}
if ($(e.target)[0] === that.$drop[0] ||
$(e.target).parents('.ms-drop')[0] !== that.$drop[0]) {
that.close();
}
});
if (this.options.isopen) {
this.open();
}
}
MultipleSelect.prototype = {
constructor : MultipleSelect,
init: function() {
var that = this,
html = [];
if (this.options.filter) {
html.push(
'<div class="ms-search">',
'<input type="text" autocomplete="off" autocorrect="off" autocapitilize="off" spellcheck="false">',
'</div>'
);
}
html.push('<ul>');
if (this.options.selectAll) {
html.push(
'<li>',
'<label>',
'<input type="checkbox" name="selectAll" /> ',
'[' + this.options.selectAllText + ']',
'</label>',
'</li>'
);
}
$.each(this.$el.children(), function(i, elm) {
html.push(that.optionToHtml(i, elm));
});
html.push('</ul>');
this.$drop.html(html.join(''));
this.$drop.find('ul').css('max-height', this.options.maxHeight + 'px');
this.$drop.find('.multiple').css('width', this.options.multipleWidth + 'px');
this.$searchInput = this.$drop.find('.ms-search input');
this.$selectAll = this.$drop.find('input[name="selectAll"]');
this.$selectGroups = this.$drop.find('label.optgroup');
this.$selectItems = this.$drop.find('input[name="selectItem"]:enabled');
this.$disableItems = this.$drop.find('input[name="selectItem"]:disabled');
this.events();
this.update();
},
optionToHtml: function(i, elm, group, groupDisabled) {
var that = this,
$elm = $(elm),
html = [],
multiple = this.options.multiple;
if ($elm.is('option')) {
var value = $elm.val(),
text = $elm.text(),
selected = $elm.prop('selected'),
disabled = groupDisabled || $elm.prop('disabled');
html.push(
'<li' + (multiple ? ' class="multiple"' : '') + '>',
'<label' + (disabled ? ' class="disabled"' : '') + '>',
'<input type="checkbox" name="selectItem" value="' + value + '"' +
(selected ? ' checked="checked"' : '') +
(disabled ? ' disabled="disabled"' : '') +
(group ? ' data-group="' + group + '"' : '') +
'/> ',
text,
'</label>',
'</li>'
);
} else if (!group && $elm.is('optgroup')) {
var _group = 'group_' + i,
label = $elm.attr('label'),
disabled = $elm.prop('disabled');
html.push(
'<li class="group">',
'<label class="optgroup' + (disabled ? ' disabled' : '') + '" data-group="' + _group + '">',
label,
'</label>',
'</li>');
$.each($elm.children(), function(i, elm) {
html.push(that.optionToHtml(i, elm, _group, disabled));
});
}
return html.join('');
},
events: function() {
var that = this;
this.$choice.off('click').on('click', function() {
that[that.options.isopen ? 'close' : 'open']();
});
this.$searchInput.off('keyup').on('keyup', function() {
that.filter();
});
this.$selectAll.off('click').on('click', function() {
var $items = that.$selectItems.filter(':visible');
$items.prop('checked', $(this).prop('checked'));
that.update();
});
this.$selectGroups.off('click').on('click', function() {
var group = $(this).attr('data-group'),
$items = that.$selectItems.filter(':visible'),
$children = $items.filter('[data-group="' + group + '"]');
$children.prop('checked', $children.length !== $children.filter(':checked').length);
that.updateSelectAll();
that.update();
});
this.$selectItems.off('click').on('click', function() {
that.updateSelectAll();
that.update();
});
},
open: function() {
if (this.$choice.hasClass('disabled')) {
return;
}
this.options.isopen = true;
this.$choice.find('>div').addClass('open');
this.$drop.show();
if (this.options.filter) {
this.$searchInput.val('');
this.filter();
}
},
close: function() {
this.options.isopen = false;
this.$choice.find('>div').removeClass('open');
this.$drop.hide();
},
update: function() {
var selects = this.getSelects('text'),
$span = this.$choice.find('>span');
if (selects.length) {
$span.removeClass('placeholder').html(selects.join(','));
} else {
$span.addClass('placeholder').html(this.options.placeholder);
}
// set selects to select
this.$el.val(this.getSelects());
},
updateSelectAll: function() {
var $items = this.$selectItems.filter(':visible');
this.$selectAll.prop('checked', $items.length &&
$items.length === $items.filter(':checked').length);
},
//value or text, default: 'value'
getSelects: function(type) {
var values = [];
this.$drop.find('input[name="selectItem"]:checked').each(function() {
values.push(type === 'text' ? $(this).parent().text() : $(this).val());
});
return values;
},
setSelects: function(values) {
var that = this;
this.$selectItems.prop('checked', false);
$.each(values, function(i, value) {
that.$selectItems.filter('[value="' + value + '"]').prop('checked', true);
});
this.$selectAll.prop('checked', this.$selectItems.length ===
this.$selectItems.filter(':checked').length);
this.update();
},
enable: function() {
this.$choice.removeClass('disabled');
},
disable: function() {
this.$choice.addClass('disabled');
},
checkAll: function() {
this.$selectItems.prop('checked', true);
this.$selectAll.prop('checked', true);
this.update();
},
uncheckAll: function() {
this.$selectItems.prop('checked', false);
this.$selectAll.prop('checked', false);
this.update();
},
refresh: function() {
this.init();
},
filter: function() {
var that = this,
text = $.trim(this.$searchInput.val()).toLowerCase();
if (text.length === 0) {
this.$selectItems.parent().show();
this.$disableItems.parent().show();
this.$selectGroups.show();
} else {
this.$selectItems.each(function() {
var $parent = $(this).parent();
$parent[$parent.text().toLowerCase().indexOf(text) < 0 ? 'hide' : 'show']();
});
this.$disableItems.parent().hide();
this.$selectGroups.each(function() {
var group = $(this).attr('data-group'),
$items = that.$selectItems.filter(':visible');
$(this)[$items.filter('[data-group="' + group + '"]').length === 0 ? 'hide' : 'show']();
});
}
this.updateSelectAll();
}
};
$.fn.multipleSelect = function() {
var option = arguments[0],
args = arguments,
value,
allowedMethods = ['getSelects', 'setSelects', 'enable', 'disable', 'checkAll', 'uncheckAll', 'refresh'];
this.each(function() {
var $this = $(this),
data = $this.data('multipleSelect'),
options = $.extend({}, $.fn.multipleSelect.defaults, typeof option === 'object' && option);
if (!data) {
data = new MultipleSelect($this, options);
$this.data('multipleSelect', data);
}
if (typeof option === 'string') {
if ($.inArray(option, allowedMethods) < 0) {
throw "Unknown method: " + option;
}
value = data[option](args[1]);
} else {
data.init();
}
});
return value ? value : this;
};
$.fn.multipleSelect.defaults = {
isopen: false,
placeholder: '',
selectAll: true,
selectAllText: 'Select all',
multiple: false,
multipleWidth: 80,
filter: false,
maxHeight: 250
};
})(jQuery);