MediaWiki:Gadget-beforeafter test.js

/*

* jQuery beforeafter plugin
* @author admin@catchmyfame.com - http://www.catchmyfame.com
* @version 1.4
* @date September 19, 2011
* @category jQuery plugin
* @copyright (c) 2009 admin@catchmyfame.com (www.catchmyfame.com)
* @license CC Attribution-NonCommercial-ShareAlike 3.0 Unported (CC BY-NC-SA 3.0) - http://creativecommons.org/licenses/by-nc-sa/3.0/
*/

(function($){ $.fn.extend({ beforeAfter: function(options) { var defaults = { animateIntro : false, introDelay : 1000, introDuration : 1000, introPosition : .5, showFullLinks : true, beforeLinkText: 'Show only before', afterLinkText: 'Show only after', imagePath : './js/', cursor: 'pointer', clickSpeed: 600, linkDisplaySpeed: 200, dividerColor: '#888', enableKeyboard: false, keypressAmount: 20, onReady: function(){} }; var options = $.extend(defaults, options);

var randID = Math.round(Math.random()*100000000);

   		return this.each(function() {

var o=options; var obj = $(this);

var imgWidth = $('img:first', obj).width(); var imgHeight = $('img:first', obj).height();

if( $('div',obj).length != 2 ) $('img',obj).wrap('

'); // For backwards compatability. Used to require images to be wrapped in div tags.

$(obj) .width(imgWidth) .height(imgHeight) .css({'overflow':'hidden','position':'relative','padding':'0'});

var bef = $('img:first', obj).attr('src'); var aft = $('img:last', obj).attr('src');

$('img:first', obj).attr('id','beforeimage'+randID); $('img:last', obj).attr('id','afterimage'+randID);

// Create an inner div wrapper (dragwrapper) to hold the images.

$(obj).prepend('

<img width="8" height="56" alt="handle" src="'+o.imagePath+'handle.gif" id="handle'+randID+'" />

'); // Create drag handle

$('#dragwrapper'+randID).css({'opacity':.25,'position':'absolute','padding':'0','left':(imgWidth*o.introPosition)-($('#handle'+randID).width()/2)+'px','z-index':'20'}).width($('#handle'+randID).width()).height(imgHeight);

$('div:eq(2)', obj).height(imgHeight).width(imgWidth*o.introPosition).css({'position':'absolute','overflow':'hidden','left':'0px','z-index':'10'}); // Set CSS properties of the before image div $('div:eq(3)', obj).height(imgHeight).width(imgWidth).css({'position':'absolute','overflow':'hidden','right':'0px'}); // Set CSS properties of the after image div $('#drag'+randID).width(2).height(imgHeight).css({'background':o.dividerColor,'position':'absolute','left':'3px'}); // Set drag handle CSS properties $('#beforeimage'+randID).css({'position':'absolute','top':'0px','left':'0px'}); $('#afterimage'+randID).css({'position':'absolute','top':'0px','right':'0px'}); $('#handle'+randID).css({'z-index':'100','position':'relative','cursor':o.cursor,'top':(imgHeight/2)-($('#handle'+randID).height()/2)+'px','left':'-3px'})

$(obj).append('<img src="'+o.imagePath+'lt-small.png" width="7" height="15" id="lt-arrow'+randID+'"><img src="'+o.imagePath+'rt-small.png" width="7" height="15" id="rt-arrow'+randID+'">');

if(o.showFullLinks) {

$(obj).after('

<a id="showleft'+randID+'" href="javascript:void(0)">'+o.beforeLinkText+'</a><a id="showright'+randID+'" href="javascript:void(0)">'+o.afterLinkText+'</a>

');

$('#links'+randID).width(imgWidth); $('#showleft'+randID).css({'position':'relative','left':'0px'}).click(function(){ $('div:eq(2)', obj).animate({width:imgWidth},o.linkDisplaySpeed); $('#dragwrapper'+randID).animate({left:imgWidth-$('#dragwrapper'+randID).width()+'px'},o.linkDisplaySpeed); }); $('#showright'+randID).css({'position':'absolute','right':'0px'}).click(function(){ $('div:eq(2)', obj).animate({width:0},o.linkDisplaySpeed); $('#dragwrapper'+randID).animate({left:'0px'},o.linkDisplaySpeed); }); }

if(o.enableKeyboard) { $(document).keydown(function(event){ if(event.keyCode == 39) { if( (parseInt($('#dragwrapper'+randID).css('left'))+parseInt($('#dragwrapper'+randID).width()) + o.keypressAmount) <= imgWidth ) { $('#dragwrapper'+randID).css('left', parseInt( $('#dragwrapper'+randID).css('left') ) + o.keypressAmount + 'px'); $('div:eq(2)', obj).width( parseInt( $('div:eq(2)', obj).width() ) + o.keypressAmount + 'px' ); } else { $('#dragwrapper'+randID).css('left', imgWidth - parseInt( $('#dragwrapper'+randID).width() ) + 'px'); $('div:eq(2)', obj).width( imgWidth - parseInt( $('#dragwrapper'+randID).width() )/2 + 'px' ); } } if(event.keyCode == 37) { if( (parseInt($('#dragwrapper'+randID).css('left')) - o.keypressAmount) >= 0 ) { $('#dragwrapper'+randID).css('left', parseInt( $('#dragwrapper'+randID).css('left') ) - o.keypressAmount + 'px'); $('div:eq(2)', obj).width( parseInt( $('div:eq(2)', obj).width() ) - o.keypressAmount + 'px' ); } else { $('#dragwrapper'+randID).css('left', '0px'); $('div:eq(2)', obj).width($('#dragwrapper'+randID).width()/2); } } }); }

$('#dragwrapper'+randID).draggable( { containment:obj,drag:drag,stop:drag });

function drag() { $('#lt-arrow'+randID+', #rt-arrow'+randID).stop().css('opacity',0); $('div:eq(2)', obj).width( parseInt( $(this).css('left') ) + 4 ); }

if(o.animateIntro) { $('div:eq(2)', obj).width(imgWidth); $('#dragwrapper'+randID).css('left',imgWidth-($('#dragwrapper'+randID).width()/2)+'px'); setTimeout(function(){ $('#dragwrapper'+randID).css({'opacity':1}).animate({'left':(imgWidth*o.introPosition)-($('#dragwrapper'+randID).width()/2)+'px'},o.introDuration,function(){$('#dragwrapper'+randID).animate({'opacity':.25},1000)}); $('div:eq(2)', obj).width(imgWidth).animate({'width':imgWidth*o.introPosition+'px'},o.introDuration,function(){clickit();o.onReady.call(this);}); },o.introDelay); } else { clickit(); o.onReady.call(this); }

function clickit() { $(obj).hover(function(){ $('#lt-arrow'+randID).stop().css({'z-index':'20','position':'absolute','top':imgHeight/2-$('#lt-arrow'+randID).height()/2+'px','left':parseInt($('#dragwrapper'+randID).css('left'))-10+'px'}).animate({opacity:1,left:parseInt($('#lt-arrow'+randID).css('left'))-6+'px'},200); $('#rt-arrow'+randID).stop().css({'position':'absolute','top':imgHeight/2-$('#lt-arrow'+randID).height()/2+'px','left':parseInt($('#dragwrapper'+randID).css('left'))+10+'px'}).animate({opacity:1,left:parseInt($('#rt-arrow'+randID).css('left'))+6+'px'},200); $('#dragwrapper'+randID).animate({'opacity':1},200); },function(){ $('#lt-arrow'+randID).animate({opacity:0,left:parseInt($('#lt-arrow'+randID).css('left'))-6+'px'},350); $('#rt-arrow'+randID).animate({opacity:0,left:parseInt($('#rt-arrow'+randID).css('left'))+6+'px'},350); $('#dragwrapper'+randID).animate({'opacity':.25},350); } );

// When clicking in the container, move the bar and imageholder divs $(obj).click(function(e){ var clickX = e.pageX - $(this).offset().left; $('#dragwrapper'+randID).stop().animate({'left':clickX-($('#dragwrapper'+randID).width()/2)+'px'},o.clickSpeed); $('div:eq(2)', obj).stop().animate({'width':clickX+'px'},o.clickSpeed); $('#lt-arrow'+randID+',#rt-arrow'+randID).stop().animate({opacity:0},50); }); $(obj).one('mousemove', function(){$('#dragwrapper'+randID).stop().animate({'opacity':1},500);}); // If the mouse is over the container and we animate the intro, we run this to change the opacity when the mouse moves since the hover event doesnt get triggered yet }

 		});
   	}

});

})(jQuery);