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make large image fit the screen #2

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make large image fit the screen #2

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26 changes: 22 additions & 4 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -35,11 +35,29 @@ $.fn.popImg = function() {
$c.css("cursor", "zoom-out").attr("data-b-img", 1);
var img = new Image();
img.onload = function(){
/*
* define big image size
*/
//make new size by default
var bigImageHeight = ($(window).height()*.9).toFixed(0);
var bigImageWidth = (this.width*bigImageHeight/this.height).toFixed(0);
//if the big image over range of the screen，use width of the original image for new image size setting
if(bigImageWidth > $(window).width())
{
bigImageWidth = ($(window).width()*.9).toFixed(0);
bigImageHeight = (this.height*bigImageWidth/this.width).toFixed(0);
}
//if the new image is larger than the original one，let's use the original image size
bigImageWidth = bigImageWidth>this.width?this.width:bigImageWidth;
bigImageHeight = bigImageHeight>this.height?this.height:bigImageHeight;
/*
* end
*/
$c.stop().animate({
width: this.width,
height: this.height,
left: (dW - this.width) / 2,
top: (dH - this.height) / 2
width: bigImageWidth,
height: bigImageHeight,
left: (dW - bigImageWidth) / 2,
top: (dH - bigImageHeight) / 2
}, 300);
};
img.src = $c.attr("src");
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