项目中用到了searchable插件,但遇见一个问题,这个插件貌似在初始化完成后,就不能动态去修改、删除选择项了....
所以为解决可以动态改变选择项,在插件功能基础上,添加了一个reload方法:
(function($){
//插件代码.....以上省略
$.fn.searchableSelect = function(options){
this.each(function(){
var sS = new $sS($(this), options);
});
return this;
};
//在插件最下边添加
$.fn.reload = function (options) {
$(this).next('.searchable-select').remove();
this.each(function(){
var sS = new $sS($(this), options);
});
}
})(jQuery);
后看底层,在初始化插件时,会在select 标签位置插入一个class为searchable-select的标签,重新加载的操作就是删除这个DIV,重新根据select生成。
最后,如果想动态修改项,就可以先修改select项,然后调用reload()。
实例:
<select>
<option value="jQuery插件库">jQuery插件库</option>
<option value="BlackBerry">BlackBerry</option>
<option value="device">device</option>
<option value="with">with</option>
<option value="entertainment">entertainment</option>
<option value="13">and</option>
<option value="social">social</option>
<option value="networking">networking</option>
<option value="apps">apps</option>
<option value="or">or</option>
<option value="apps">apps</option>
<option value="that">that</option>
<option value="will">will</option>
<option value="boost">boost</option>
<option value="your">your</option>
<option value="productivity">productivity</option>
<option value="Download">Download</option>
<option value="or">or</option>
<option value="buy">buy</option>
<option value="apps">apps</option>
<option value="from">from</option>
<option value="Afbb">Afbb</option>
<option value="Akademie">Akademie</option>
<option value="Berlin">Berlin</option>
<option value="reviews">reviews</option>
<option value="by">by</option>
<option value="real">real</option>
</select>
<script>
function reloadSelect() {
$('select').html('<option value="1">A</option><option value="2">B</option><option value="3">C</option>');
$('select').reload();//重新根据select初始化
}
$(function(){
$('select').searchableSelect();
});
</script>
这是从网站上找到的一个例子,在这个例子基础上添加了reloadSelect方法,在插件内添加reload函数后,就可以通过JQuery对象直接调用.
当调用reoadSelect()方法时,插件重新根据select重建。
最后附上修改后插件,全部代码,仅在文件末尾修改:
// Author: David Qin
// E-mail: [email protected]
// Date: 2014-11-05
(function($){
// a case insensitive jQuery :contains selector
$.expr[":"].searchableSelectContains = $.expr.createPseudo(function(arg) {
return function( elem ) {
return $(elem).text().toUpperCase().indexOf(arg.toUpperCase()) >= 0;
};
});
$.searchableSelect = function(element, options) {
this.element = element;
this.options = options || {};
this.init();
var _this = this;
this.searchableElement.click(function(event){
// event.stopPropagation();
_this.show();
}).on('keydown', function(event){
if (event.which === 13 || event.which === 40 || event.which == 38){
event.preventDefault();
_this.show();
}
});
$(document).on('click', null, function(event){
if(_this.searchableElement.has($(event.target)).length === 0)
_this.hide();
});
this.input.on('keydown', function(event){
event.stopPropagation();
if(event.which === 13){ //enter
event.preventDefault();
_this.selectCurrentHoverItem();
_this.hide();
} else if (event.which == 27) { //ese
_this.hide();
} else if (event.which == 40) { //down
_this.hoverNextItem();
} else if (event.which == 38) { //up
_this.hoverPreviousItem();
}
}).on('keyup', function(event){
if(event.which != 13 && event.which != 27 && event.which != 38 && event.which != 40)
_this.filter();
})
}
var $sS = $.searchableSelect;
$sS.fn = $sS.prototype = {
version: '0.0.1'
};
$sS.fn.extend = $sS.extend = $.extend;
$sS.fn.extend({
init: function(){
var _this = this;
this.element.hide();
this.searchableElement = $('<div tabindex="0" class="searchable-select"></div>');
this.holder = $('<div class="searchable-select-holder"></div>');
this.dropdown = $('<div class="searchable-select-dropdown searchable-select-hide"></div>');
this.input = $('<input type="text" class="searchable-select-input" />');
this.items = $('<div class="searchable-select-items"></div>');
this.caret = $('<span class="searchable-select-caret"></span>');
this.scrollPart = $('<div class="searchable-scroll"></div>');
this.hasPrivious = $('<div class="searchable-has-privious">...</div>');
this.hasNext = $('<div class="searchable-has-next">...</div>');
this.hasNext.on('mouseenter', function(){
_this.hasNextTimer = null;
var f = function(){
var scrollTop = _this.items.scrollTop();
_this.items.scrollTop(scrollTop + 20);
_this.hasNextTimer = setTimeout(f, 50);
}
f();
}).on('mouseleave', function(event) {
clearTimeout(_this.hasNextTimer);
});
this.hasPrivious.on('mouseenter', function(){
_this.hasPriviousTimer = null;
var f = function(){
var scrollTop = _this.items.scrollTop();
_this.items.scrollTop(scrollTop - 20);
_this.hasPriviousTimer = setTimeout(f, 50);
}
f();
}).on('mouseleave', function(event) {
clearTimeout(_this.hasPriviousTimer);
});
this.dropdown.append(this.input);
this.dropdown.append(this.scrollPart);
this.scrollPart.append(this.hasPrivious);
this.scrollPart.append(this.items);
this.scrollPart.append(this.hasNext);
this.searchableElement.append(this.caret);
this.searchableElement.append(this.holder);
this.searchableElement.append(this.dropdown);
this.element.after(this.searchableElement);
this.buildItems();
this.setPriviousAndNextVisibility();
},
filter: function(){
var text = this.input.val();
this.items.find('.searchable-select-item').addClass('searchable-select-hide');
this.items.find('.searchable-select-item:searchableSelectContains('+text+')').removeClass('searchable-select-hide');
if(this.currentSelectedItem.hasClass('searchable-select-hide') && this.items.find('.searchable-select-item:not(.searchable-select-hide)').length > 0){
this.hoverFirstNotHideItem();
}
this.setPriviousAndNextVisibility();
},
hoverFirstNotHideItem: function(){
this.hoverItem(this.items.find('.searchable-select-item:not(.searchable-select-hide)').first());
},
selectCurrentHoverItem: function(){
if(!this.currentHoverItem.hasClass('searchable-select-hide'))
this.selectItem(this.currentHoverItem);
},
hoverPreviousItem: function(){
if(!this.hasCurrentHoverItem())
this.hoverFirstNotHideItem();
else{
var prevItem = this.currentHoverItem.prevAll('.searchable-select-item:not(.searchable-select-hide):first')
if(prevItem.length > 0)
this.hoverItem(prevItem);
}
},
hoverNextItem: function(){
if(!this.hasCurrentHoverItem())
this.hoverFirstNotHideItem();
else{
var nextItem = this.currentHoverItem.nextAll('.searchable-select-item:not(.searchable-select-hide):first')
if(nextItem.length > 0)
this.hoverItem(nextItem);
}
},
buildItems: function(){
var _this = this;
this.element.find('option').each(function(){
var item = $('<div class="searchable-select-item" data-value="'+$(this).attr('value')+'">'+$(this).text()+'</div>');
if(this.selected){
_this.selectItem(item);
_this.hoverItem(item);
}
item.on('mouseenter', function(){
$(this).addClass('hover');
}).on('mouseleave', function(){
$(this).removeClass('hover');
}).click(function(event){
event.stopPropagation();
_this.selectItem($(this));
_this.hide();
});
_this.items.append(item);
});
this.items.on('scroll', function(){
_this.setPriviousAndNextVisibility();
})
},
show: function(){
this.dropdown.removeClass('searchable-select-hide');
this.input.focus();
this.status = 'show';
this.setPriviousAndNextVisibility();
},
hide: function(){
if(!(this.status === 'show'))
return;
if(this.items.find(':not(.searchable-select-hide)').length === 0)
this.input.val('');
this.dropdown.addClass('searchable-select-hide');
this.searchableElement.trigger('focus');
this.status = 'hide';
},
hasCurrentSelectedItem: function(){
return this.currentSelectedItem && this.currentSelectedItem.length > 0;
},
selectItem: function(item){
if(this.hasCurrentSelectedItem())
this.currentSelectedItem.removeClass('selected');
this.currentSelectedItem = item;
item.addClass('selected');
this.hoverItem(item);
this.holder.text(item.text());
var value = item.data('value');
this.holder.data('value', value);
this.element.val(value);
if(this.options.afterSelectItem){
this.options.afterSelectItem.apply(this);
}
},
hasCurrentHoverItem: function(){
return this.currentHoverItem && this.currentHoverItem.length > 0;
},
hoverItem: function(item){
if(this.hasCurrentHoverItem())
this.currentHoverItem.removeClass('hover');
if(item.outerHeight() + item.position().top > this.items.height())
this.items.scrollTop(this.items.scrollTop() + item.outerHeight() + item.position().top - this.items.height());
else if(item.position().top < 0)
this.items.scrollTop(this.items.scrollTop() + item.position().top);
this.currentHoverItem = item;
item.addClass('hover');
},
setPriviousAndNextVisibility: function(){
if(this.items.scrollTop() === 0){
this.hasPrivious.addClass('searchable-select-hide');
this.scrollPart.removeClass('has-privious');
} else {
this.hasPrivious.removeClass('searchable-select-hide');
this.scrollPart.addClass('has-privious');
}
if(this.items.scrollTop() + this.items.innerHeight() >= this.items[0].scrollHeight){
this.hasNext.addClass('searchable-select-hide');
this.scrollPart.removeClass('has-next');
} else {
this.hasNext.removeClass('searchable-select-hide');
this.scrollPart.addClass('has-next');
}
}
});
$.fn.searchableSelect = function(options){
this.each(function(){
var sS = new $sS($(this), options);
});
return this;
};
$.fn.reload = function (options) {
$(this).next('.searchable-select').remove();
this.each(function(){
var sS = new $sS($(this), options);
});
}
})(jQuery);