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Got expose gallery to paginate/fetch images backwards and forwards

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This commit is contained in:
Nathan Gray 2015-01-21 23:41:26 +00:00
parent 64c52e385a
commit f27d39aeeb
1 changed files with 109 additions and 14 deletions
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123
etemplate/js/expose.js
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@ -76,7 +76,8 @@ function expose (widget)
if(nextmatch == null || nextmatch.controller == null) return null;
return nextmatch;
}
};
/**
* Read images out of the data for the nextmatch
*
@ -89,14 +90,15 @@ function expose (widget)
if(!start_at) start_at = 0;
var stop = Math.max.apply(null,Object.keys(nm.controller._indexMap));
for(var i = start_at; i < stop; i++)
for(var i = start_at; i <= stop; i++)
{
if(!nm.controller._indexMap[i] || !nm.controller._indexMap[i].uid)
{
// Returning instead of using IMAGE_DEFAULT means we stop as
// soon as a hole is found, instead of getting everything that is
// available. The gallery can't fill in the holes.
return;
images[i] = IMAGE_DEFAULT;
continue;
}
var uid = nm.controller._indexMap[i].uid;
if(!uid) continue;
@ -104,12 +106,86 @@ function expose (widget)
if(data && data.data && data.data.mime && mime_regex.test(data.data.mime))
{
var media = this.getMedia(data.data);
images.push(jQuery.extend({}, data.data, media[0]));
images[i] = jQuery.extend({}, data.data, media[0]);
}
}
}
/**
* Set a particular index/image in the gallery instead of just appending
* it to the end
*
* @param {integer} index
* @param {Object} image
* @returns {undefined}
*/
var set_slide = function(index, image)
{
var active = (index == gallery.index);
// Pad with blanks until length is right
while(index > gallery.getNumber())
{
gallery.add([jQuery.extend({}, IMAGE_DEFAULT)]);
}
// Don't bother with adding a default, we just did that
if(image.loading)
{
$j(gallery.slides[index])
.addClass(gallery.options.slideLoadingClass)
.removeClass(gallery.options.slideErrorClass);
return;
}
// Just use add to let gallery create everything it needs
var new_index = gallery.num;
gallery.add([image]);
// Move it to where we want it.
// Gallery uses arrays and indexes and has several internal variables
// that need to be updated.
//
// list
gallery.list[index] = gallery.list[new_index];
gallery.list.splice(new_index,1)
// indicators & slides
var dom_nodes = ['indicators','slides'];
for(var i in dom_nodes)
{
var var_name = dom_nodes[i];
// Remove old one from DOM
$j(gallery[var_name][index]).remove();
// Move new one into it's place in gallery
gallery[var_name][index] = gallery[var_name][new_index];
// Move into place in DOM
var node = $j(gallery[var_name][index]);
node.attr('data-index', index)
.insertAfter($j("[data-index='"+(index-1)+"']",node.parent()));
if(active) node.addClass(gallery.options.activeIndicatorClass);
gallery[var_name].splice(new_index,1);
}
if(active)
{
gallery.activeIndicator = $j(gallery.indicators[index]);
}
// positions
gallery.positions[index] = active ? 0 : (index > gallery.index ? gallery.slideWidth : -gallery.slideWidth);
gallery.positions.splice(new_index,1);
// elements - removing will allow to re-do the slide
if(gallery.elements[index])
{
delete gallery.elements[index];
gallery.loadElement(index);
}
// Remove the one we just added
gallery.num -= 1;
};
return widget.extend([et2_IExposable],{
/**
@ -344,8 +420,8 @@ function expose (widget)
.addClass('paginating')
.mousewheel(function(event, delta) {
if(delta > 0 && parseInt($j(this).css('left')) > gallery.container.width() / 2) return;
// Move it about 10 indicators
$j(this).css('left',parseInt($j(this).css('left'))-(-delta*150)+'px');
// Move it about 5 indicators
$j(this).css('left',parseInt($j(this).css('left'))-(-delta*gallery.activeIndicator.width()*5)+'px');
event.preventDefault();
})
.swipe(function(event, direction, distance) {
@ -397,19 +473,38 @@ function expose (widget)
// Check to see if we're near the end, or maybe some pagination
// would be good.
var total_count = nm.controller._grid.getTotalCount();
if(!gallery.list[index+1] || gallery.list[index+1].loading ||
// Already at the end, don't bother
if(index == total_count) return;
// Try to determine direction from state of next & previous slides
var direction = 1;
for(var i in gallery.elements)
{
// Loading or error
if(gallery.elements[i] == 1 || gallery.elements[i] == 3 || gallery.list[i].loading)
{
direction = i >= index ? 1 : -1;
break;
}
}
if(!gallery.list[index+direction] || gallery.list[index+direction].loading ||
total_count > gallery.getNumber() && index + ET2_DATAVIEW_STEPSIZE > gallery.getNumber())
{
// Well, this will get the next batch of rows
nm.controller._gridCallback(index, index + ET2_DATAVIEW_STEPSIZE);
// This will get the next batch of rows
var start = Math.max(0, direction > 0 ? index : index - ET2_DATAVIEW_STEPSIZE);
var end = Math.min(total_count - 1, start + ET2_DATAVIEW_STEPSIZE);
nm.controller._gridCallback(start, end);
var images = [];
read_from_nextmatch.call(this, nm, images, index);
read_from_nextmatch.call(this, nm, images, start);
// Gallery always adds to the end, causing problems with pagination
for(var i in images)
{
if(i == index || i < gallery.num) continue;
gallery.add([images[i]]);
//if(i == index || i < gallery.num) continue;
set_slide(i, images[i]);
//gallery.add([images[i]]);
}
}
}