I need help with the code on my site, http://www.luischales.com/miami-quinces-photography.html . the first time you open it the slide don't start until all images are loaded (i think), and clients don't like to wait so my question is, can someone point me to a way to load the images on demand? or at least load the first images and then the other ones?
CODE
//<![CDATA[
$(function() {
var $tf_bg = $('#tf_bg'),
$tf_bg_images = $tf_bg.find('img'),
$tf_bg_img = $tf_bg_images.eq(0),
$tf_thumbs = $('#tf_thumbs'),
total = $tf_bg_images.length,
current = 0,
$tf_content_wrapper = $('#tf_content_wrapper'),
$tf_next = $('#tf_next'),
$tf_prev = $('#tf_prev'),
$tf_loading = $('#tf_loading');
//preload the images
$tf_bg_images.preload({
onComplete : function(){
$tf_loading.hide();
init();
}
});
//shows the first image and initializes events
function init(){
//get dimentions for the image, based on the windows size
var dim = getImageDim($tf_bg_img);
//set the returned values and show the image
$tf_bg_img.css({
width : dim.width,
height : dim.height,
left : dim.left,
top : dim.top
}).fadeIn();
//resizing the window resizes the $tf_bg_img
$(window).bind('resize',function(){
var dim = getImageDim($tf_bg_img);
$tf_bg_img.css({
width : dim.width,
height : dim.height,
left : dim.left,
top : dim.top
});
});
//expand and fit the image to the screen
$('#tf_zoom').live('click',
function(){
if($tf_bg_img.is(':animated'))
return false;
var $this = $(this);
if($this.hasClass('tf_zoom')){
resize($tf_bg_img);
$this.addClass('tf_fullscreen')
.removeClass('tf_zoom');
}
else{
var dim = getImageDim($tf_bg_img);
$tf_bg_img.animate({
width : dim.width,
height : dim.height,
top : dim.top,
left : dim.left
},350);
$this.addClass('tf_zoom')
.removeClass('tf_fullscreen');
}
}
);
//click the arrow down, scrolls down
$tf_next.bind('click',function(){
if($tf_bg_img.is(':animated'))
return false;
scroll('tb');
});
//click the arrow up, scrolls up
$tf_prev.bind('click',function(){
if($tf_bg_img.is(':animated'))
return false;
scroll('bt');
});
//mousewheel events - down / up button trigger the scroll down / up
$(document).mousewheel(function(e, delta) {
if($tf_bg_img.is(':animated'))
return false;
if(delta > 0)
scroll('bt');
else
scroll('tb');
return false;
});
//key events - down / up button trigger the scroll down / up
$(document).keydown(function(e){
if($tf_bg_img.is(':animated'))
return false;
switch(e.which){
case 38:
scroll('bt');
break;
case 40:
scroll('tb');
break;
}
});
}
//show next / prev image
function scroll(dir){
//if dir is "tb" (top -> bottom) increment current,
//else if "bt" decrement it
current = (dir == 'tb')?current + 1:current - 1;
//we want a circular slideshow,
//so we need to check the limits of current
if(current == total) current = 0;
else if(current < 0) current = total - 1;
//flip the thumb
$tf_thumbs.flip({
direction : dir,
speed : 400,
onBefore : function(){
//the new thumb is set here
var content = '<span id="tf_zoom" class="tf_zoom"><\/span>';
content +='<img src="' + $tf_bg_images.eq(current).attr('longdesc') + '" alt="Thumb' + (current+1) + '"/>';
$tf_thumbs.html(content);
}
});
//we get the next image
var $tf_bg_img_next = $tf_bg_images.eq(current),
//its dimentions
dim = getImageDim($tf_bg_img_next),
//the top should be one that makes the image out of the viewport
//the image should be positioned up or down depending on the direction
top = (dir == 'tb')?$(window).height() + 'px':-parseFloat(dim.height,10) + 'px';
//set the returned values and show the next image
$tf_bg_img_next.css({
width : dim.width,
height : dim.height,
left : dim.left,
top : top
}).show();
//now slide it to the viewport
$tf_bg_img_next.stop().animate({
top : dim.top
},700);
//we want the old image to slide in the same direction, out of the viewport
var slideTo = (dir == 'tb')?-$tf_bg_img.height() + 'px':$(window).height() + 'px';
$tf_bg_img.stop().animate({
top : slideTo
},700,function(){
//hide it
$(this).hide();
//the $tf_bg_img is now the shown image
$tf_bg_img = $tf_bg_img_next;
//show the description for the new image
$tf_content_wrapper.children()
.eq(current)
.show();
});
//hide the current description
$tf_content_wrapper.children(':visible')
.hide()
}
//animate the image to fit in the viewport
function resize($img){
var w_w = $(window).width(),
w_h = $(window).height(),
i_w = $img.width(),
i_h = $img.height(),
r_i = i_h / i_w,
new_w,new_h;
if(i_w > i_h){
new_w = w_w;
new_h = w_w * r_i;
if(new_h > w_h){
new_h = w_h;
new_w = w_h / r_i;
}
}
else{
new_h = w_w * r_i;
new_w = w_w;
}
$img.animate({
width : new_w + 'px',
height : new_h + 'px',
top : '0px',
left : '0px'
},350);
}
//get dimentions of the image,
//in order to make it full size and centered
function getImageDim($img){
var w_w = $(window).width(),
w_h = $(window).height(),
r_w = w_h / w_w,
i_w = $img.width(),
i_h = $img.height(),
r_i = i_h / i_w,
new_w,new_h,
new_left,new_top;
if(r_w > r_i){
new_h = w_h;
new_w = w_h / r_i;
}
else{
new_h = w_w * r_i;
new_w = w_w;
}
return {
width : new_w + 'px',
height : new_h + 'px',
left : (w_w - new_w) / 2 + 'px',
top : (w_h - new_h) / 2 + 'px'
};
}
});
//]]>
</script>
