私はあなたのために何かを一緒に投げることにしました。完璧にはほど遠いですが、正しい方向に進むはずです。このプラグインをさらに進めることができるように、適切なドキュメントを提供しようとしました。時間がきついので、あまり徹底的なテストはしませんでした。うまくいけば、これが役に立ちます。
まず、動作中の jsFiddle へのリンク
さて、コード
/**
* You can target the .vLine class and change anything you want
* Core Propreties that should be left untouched are:
1. top value
3. position declaration
* Any other CSS properties should be changed to suit your style.
* In some cases, you may want to change the left / right values
* to fit the needs of the position of the vLine
* simply use $('.vLine').css('left/right', 'value');
*/
(function($){
//define methods of the plugin
var methods = {
init: function(options){
//set up some default values
var defaults = {
'side' : 'right'
}
//for each element with vLine applied
return this.each(function(){
//override defaults with user defined options
var settings = $.extend({}, defaults, options);
//cache variable for performance
var $this = $(this);
//wrap the UL with a positioned object just in case
$this.wrap('<div style="position:relative;width:'+$this.css('width')+';height:'+$this.css('height')+';"></div>');
//test to see if element exists, if not, append it
if(!$('.vLine').length){
//parent is the ul we wrapped
//insert the vLine element into the document
$this.parent().append($('<div style="position:absolute;top:'+$this.position().top+'px;height:'+$this.height() / $this.find('li').length+'px;width:3px;" class="vLine"></div>'));
//do we want to show it on the left or right?
if(settings.side = 'right'){
$('.vLine').css('right', '0');
}else if(settings.side = 'left'){
$('.vLine').css('left', '0');
}
}
//define the hover functions for each li
$this.find('li').hover(function(e){
$('.vLine').stop().animate({
top: $(this).position().top
},200);
}, function(e){
//we want to reset the line if this is met
if(['UL', 'LI'].indexOf(e.toElement.tagName) == -1){
$('.vLine').stop().animate({
top: '1px'
});
}
});
});
}
}
//make it a function!
$.fn.vLine = function( method ) {
if (methods[method]) {
return methods[method].apply( this, Array.prototype.slice.call( arguments, 1 ));
} else if (typeof method === 'object' || !method) {
return methods.init.apply(this, arguments);
} else {
$.error( 'Method ' + method + ' does not exist on jQuery.vLine' );
}
};
})(jQuery);
//on document ready
$(function(){
//invoke our vLine!
$('ul').vLine();
});