CODEWITHSUNDEEP
javascriptimageurlsrc
jfrye
jfrye

Reputation: 437

Change Image Source AND Add File Name Suffix

How do I specify the exact file path directory for the "-hover" image (rollover effect)? Right now, this only works for images living in a child directory.

$(function(){
  $('.box-img').append('<span></span>').hover(
    function(){
      $(this).find('img').stop().animate({opacity:0})
    }, function(){
      $(this).find('img').stop().animate({opacity:1})
    }
  ).each(function(){
    var src=new Array()
    src=$(this).find('img').attr('src').split('.')
    src=src[0]+'-hover.'+src[1]
    $(this).find('>span').css({background:'url('+src+')'})
  });
})

Upvotes: 2

Views: 1873

Answers (2)

Tomas Ramirez Sarduy
Tomas Ramirez Sarduy

Reputation: 17471

I like to use sprites with the background-position css property, but you can try this, using RegExp:

$(document).ready(function(){
   // Change the image of hoverable images
   $(".imgHoverable").hover( function() {
       var hoverImg = HoverImgOf($(this).attr("src"));
       $(this).attr("src", hoverImg);
     }, function() {
       var normalImg = NormalImgOf($(this).attr("src"));
       $(this).attr("src", normalImg);
     }
   );
});

function HoverImgOf(filename)
{
   var re = new RegExp("(.+)\\.(gif|png|jpg)", "g");
   return filename.replace(re, "$1-hover.$2");
}
function NormalImgOf(filename)
{
   var re = new RegExp("(.+)-hover\\.(gif|png|jpg)", "g");
   return filename.replace(re, "$1.$2");
}

Upvotes: 3

LSerni
LSerni

Reputation: 57388

You can use basename from jquery.utils to extract the basename from your src. Then you split basename by ".", add '-hover', and reconstruct the path. So you needn't worry about names such as "../../css/images/image.png".

Or you can split by "/", then retrieve the last element of the array as the basename, and that one you split by ".".

var src=new Array()
// path/to/filename.jpg
src=$(this).find('img').attr('src').split('/')

var bname = src.pop()   // bname is now filename.jpg, src is { path to }
var bco=new Array()     
bco = bname.split('.')  // bco is now { filename jpg }
ext = bco.pop()         // ext is jpg, bco is { filename }
nam = bco.pop()         // nam is filename, bco is { }

bco.push(nam + '-hover') // bco is { filename-hover }
bco.push(ext)            // bco is { filename-hover jpg }

bname = bco.join('.')   // bname is now filename-hover.jpg

src.push(bname)

srcString = src.join('/')

You also still have to care about how you name files with a dot in the basename (e.g. "ubuntu-12.02.jpg"), and how you reassemble the split array.

Upvotes: 1

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