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(function($) {
$.gallery_slideshow = {
interval: 4000,
timer: null,
init: function(data) {
var self = this;
var size = $.gallery_get_viewport_size();
$("body").append(
'<div id="gSlideshowOverlay" class="ui-dialog-overlay"></div>' +
'<div id="gSlideshowButtonPanel"><div class="ui-corner-all">' +
'<a id="gSlideshowPrevious" href="javascript: $.gallery_slideshow.previous()" />' +
'<a id="gSlideshowPause" href="javascript: $.gallery_slideshow.pause()" />' +
'<a id="gSlideshowResume" href="javascript: $.gallery_slideshow.resume()" />' +
'<a id="gSlideshowNext" href="javascript: $.gallery_slideshow.next()" />' +
'<a id="gSlideshowClose" href="javascript: $.gallery_slideshow.close()" />' +
'</div></div>' +
'<div id="gSlideShowImages"></div>');
$().bind("mousemove", $.gallery_slideshow._mouse_over);
// array of {url: xxx, width: nnn, height: nnn}
for (var i=0; i < data.length; i++) {
var position = $.gallery_slideshow._autofit_image(data[i].width, data[i].height);
$("#gSlideShowImages").append(
'<img id="img_' + i + '" src="' + data[i].url + '" width="' + position.width + 'px" ' +
'height="' + position.height + 'px" style="position: absolute; top: ' + position.top +
'px; left: ' + position.left + 'px;" />');
if (i == 0) {
$("#gSlideShowImages #img_0").load(function() {
$.gallery_slideshow._show_image(null);
setTimeout(function() {$("#gSlideshowButtonPanel").hide();},
$.gallery_slideshow.interval);
});
}
}
},
close: function(event) {
$("#gSlideShowImages img.gSlideShowing").toggle();
$.gallery_slideshow.pause();
$("#gSlideshowOverlay").remove();
$("#gSlideShowImages").remove();
$("#gSlideshowButtonPanel").remove();
$().unbind("mousemove", $.gallery_slideshow._mouse_over);
},
previous: function() {
$.gallery_slideshow.pause();
var next_image = $("#gSlideShowImages img.gSlideShowing").prev();
if (next_image.length == 0) {
next_image = $("#gSlideShowImages img:last");
}
$.gallery_slideshow._show_image(next_image);
},
next: function() {
$.gallery_slideshow.pause();
var next_image = $("#gSlideShowImages img.gSlideShowing").next();
if (next_image.length == 0) {
next_image = $("#gSlideShowImages img:first");
}
$.gallery_slideshow._show_image(next_image);
},
pause: function() {
if ($.gallery_slideshow.timer) {
$("#gSlideshowPause").toggle();
$("#gSlideshowResume").toggle();
clearTimeout($.gallery_slideshow.timer);
$.gallery_slideshow.timer = null;
}
},
resume: function() {
$("#gSlideshowPause").toggle();
$("#gSlideshowResume").toggle();
$.gallery_slideshow._show_image(null);
},
_mouse_over: function(event) {
var size = $.gallery_get_viewport_size();
if (event.pageY < size.height() && size.height() - 100 <= event.pageY) {
$("#gSlideshowButtonPanel").show();
} else {
$("#gSlideshowButtonPanel").hide();
}
},
_autofit_image: function(imageWidth, imageHeight) {
var size = $.gallery_get_viewport_size();
var ratio = size.width() / imageWidth;
imageWidth *= ratio;
imageHeight *= ratio;
/* after scaling the width, check that the height fits */
if (imageHeight > size.height()) {
ratio = size.height() / imageHeight;
imageWidth *= ratio;
imageHeight *= ratio;
}
// handle the case where the calculation is almost zero (2.14e-14)
return {
top: Number((size.height() - imageHeight) / 2),
left: Number((size.width() - imageWidth) / 2),
width: Number(imageWidth),
height: Number(imageHeight)
};
},
// If next_image is not null, then this a call from prev or next
_show_image: function(next_image) {
var reset_timer = false;
if (next_image == null) {
next_image = $("#gSlideShowImages img.gSlideShowing").next();
if (next_image.length == 0) {
next_image = $("#gSlideShowImages img:first");
}
reset_timer = true;
}
next_image.addClass("gSlideShowNextImage");
var zIndex = parseInt(next_image.css("zIndex"));
next_image.css("zIndex", zIndex + 1);
next_image.fadeIn("slow", function() {
var current = $("#gSlideShowImages img.gSlideShowing");
if (current.length) {
current.hide();
current.removeClass("gSlideShowing");
}
$(".gSlideShowNextImage").addClass("gSlideShowing").removeClass("gSlideShowNextImage")
.css("zIndex", zIndex);
if (reset_timer) {
$.gallery_slideshow.timer =
setTimeout(function() {$.gallery_slideshow._show_image(null);},
$.gallery_slideshow.interval);
}
});
}
};
})(jQuery);
$(document).ready(function() {
$("#gSlideshowLink").click(function(event) {
event.preventDefault();
$.get($(event.currentTarget).attr("href"), {}, $.gallery_slideshow.init, "json");
return false;
});
});
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