这是一款效果非常酷的 jQuery超酷文本和图标动画菜单特效插件。
HTML结构
html结构使用无序列表,每一个列表项都包含一个a元素,a元素中有三个用于动画的元素。
<ul id="sti-menu" class="sti-menu"> <li data-hovercolor="#37c5e9"> <a href="#"> <h2 data-type="mText" class="sti-item"> Some text </h2> <h3 data-type="sText" class="sti-item"> Some more text </h3> <span data-type="icon" class="sti-icon sti-icon-care sti-item"> </span> </a> </li> <li>...</li> ... </ul>
data-hovercolor将被用来设置鼠标滑过时文本的颜色。同时我们也给标题元素和图标span一些data-type,以便在后面用jQuery来控制它们。
JAVASCRIPT
首先定义一些默认设置:
var settings = { // configuration for the mouseenter event animMouseenter : { 'mText' : {speed : 350, easing : 'easeOutExpo', delay : 140, dir : 1}, 'sText' : {speed : 350, easing : 'easeOutExpo', delay : 0, dir : 1}, 'icon' : {speed : 350, easing : 'easeOutExpo', delay : 280, dir : 1} }, // configuration for the mouseleave event animMouseleave : { 'mText' : {speed : 300, easing : 'easeInExpo', delay : 140, dir : 1}, 'sText' : {speed : 300, easing : 'easeInExpo', delay : 280, dir : 1}, 'icon' : {speed : 300, easing : 'easeInExpo', delay : 0, dir : 1} }, // speed for the item bg color animation boxAnimSpeed : 300, // default text color (same defined in the css) defaultTextColor : '#000', // default bg color (same defined in the css) defaultBgColor : '#fff' };
我们的每一个元素都有速度、easing效果、延时和方向(1为向上0为向下)。
return this.each(function() { // if options exist, lets merge them with our default settings if ( options ) { $.extend( settings, options ); } var $el = $(this), // the menu items $menuItems = $el.children('li'), // save max delay time for mouseleave anim parameters maxdelay = Math.max( settings.animMouseleave['mText'].speed + settings.animMouseleave['mText'].delay , settings.animMouseleave['sText'].speed + settings.animMouseleave['sText'].delay , settings.animMouseleave['icon'].speed + settings.animMouseleave['icon'].delay ), // timeout for the mouseenter event // lets us move the mouse quickly over the items, // without triggering the mouseenter event t_mouseenter; // save default top values for the moving elements: // the elements that animate inside each menu item $menuItems.find('.sti-item').each(function() { var $el = $(this); $el.data('deftop', $el.position().top); }); // Events ... });
接下来为菜单项定义鼠标进入事件:
$menuItems.bind('mouseenter', function(e) { clearTimeout(t_mouseenter); var $item = $(this), $wrapper = $item.children('a'), wrapper_h = $wrapper.height(), // the elements that animate inside this menu item $movingItems= $wrapper.find('.sti-item'), // the color that the texts will have on hover hovercolor = $item.data('hovercolor'); t_mouseenter = setTimeout(function() { // indicates the item is on hover state $item.addClass('sti-current'); $movingItems.each(function(i) { var $item = $(this), item_sti_type = $item.data('type'), speed = settings.animMouseenter[item_sti_type].speed, easing = settings.animMouseenter[item_sti_type].easing, delay = settings.animMouseenter[item_sti_type].delay, dir = settings.animMouseenter[item_sti_type].dir, // if dir is 1 the item moves downwards // if -1 then upwards style = {'top' : -dir * wrapper_h + 'px'}; if( item_sti_type === 'icon' ) { // this sets another bg image position for the icon style.backgroundPosition = 'bottom left'; } else { style.color = hovercolor; } // we hide the icon, move it up or down, and then show it $item.hide().css(style).show(); clearTimeout($item.data('time_anim')); $item.data('time_anim', setTimeout(function() { // now animate each item to its default tops // each item will animate with a delay specified // in the options $item.stop(true) .animate({top : $item.data('deftop') + 'px'}, speed, easing); }, delay) ); }); // animate the bg color of the item $wrapper.stop(true).animate({ backgroundColor: settings.defaultTextColor }, settings.boxAnimSpeed ); }, 100); })
然后定义鼠标离开事件:
// mouseleave event for each menu item .bind('mouseleave', function(e) { clearTimeout(t_mouseenter); var $item = $(this), $wrapper = $item.children('a'), wrapper_h = $wrapper.height(), $movingItems= $wrapper.find('.sti-item'); if(!$item.hasClass('sti-current')) return false; $item.removeClass('sti-current'); $movingItems.each(function(i) { var $item = $(this), item_sti_type = $item.data('type'), speed = settings.animMouseleave[item_sti_type].speed, easing = settings.animMouseleave[item_sti_type].easing, delay = settings.animMouseleave[item_sti_type].delay, dir = settings.animMouseleave[item_sti_type].dir; clearTimeout($item.data('time_anim')); setTimeout(function() { $item.stop(true).animate({'top' : -dir * wrapper_h + 'px'}, speed, easing, function() { if( delay + speed === maxdelay ) { $wrapper.stop(true).animate({ backgroundColor: settings.defaultBgColor }, settings.boxAnimSpeed ); $movingItems.each(function(i) { var $el = $(this), style = {'top' : $el.data('deftop') + 'px'}; if( $el.data('type') === 'icon' ) { style.backgroundPosition = 'top left'; } else { style.color = settings.defaultTextColor; } $el.hide().css(style).show(); }); } }); }, delay); }); });
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