Sortable lists in < 100 LoC
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class SortableList | |
constructor: (el) -> | |
@el = $(el) | |
down: (e) => | |
e.preventDefault() | |
top = @el.offset().top | |
@el.find(".sortable").each (i, el) -> | |
$el = $(el) | |
offset = $el.offset().top | |
h = $el.outerHeight(true) | |
y = offset - top | |
$el.data height: h, offset: y, y: y | |
@drag = | |
offset: top | |
item: $(e.target).closest(".sortable").addClass("sorting") | |
items: ($(item) for item in @el.find(".sortable").get()) | |
origin: @eventPosition(e) | |
$(document). | |
on("mousemove touchmove", @move). | |
on("mouseup touchend", @up) | |
@move(e) | |
move: (e) => | |
# TODO: auto-scroll parent region | |
y = @eventPosition(e) - @drag.origin | |
@drag.item. | |
css(transform: "translateY(#{y}px)"). | |
data(y: @drag.item.data("offset") + y) | |
@sortItems() | |
up: (e) => | |
e.preventDefault() | |
@el.find(".sortable").removeClass("sorting").css(transform: "translateY(0)") | |
for item in @drag.items | |
item.appendTo(@el) | |
$(document). | |
off("mousemove touchmove", @move). | |
off("mouseup touchend", @up) | |
@el.trigger("sorted") | |
eventPosition: (e) -> | |
if e.originalEvent.targetTouches?.length | |
e.originalEvent.targetTouches[0].pageY | |
else | |
e.pageY | |
sortItems: -> | |
@drag.items.sort (a, b) => | |
a.data("y") - b.data("y") | |
y = 0 | |
for item in @drag.items | |
dy = y - item.data("offset") | |
unless item.hasClass("sorting") | |
item. | |
data(y: y). | |
css(transform: "translateY(#{dy}px)") | |
y += item.data("height") | |
$(document) | |
.on "mousedown touchstart", ".sortable-list [rel=reorder]", (e) -> | |
list = $(e.target).closest(".sortable-list") | |
unless manager = list.data("sortable") | |
manager = new SortableList(list) | |
list.data "sortable", manager | |
manager.down e | |
.on "click tap", ".sortable-list [rel=reorder]", (e) -> | |
e.preventDefault() |
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<ul class="sortable-list"> | |
<li class="sortable"><span rel="reorder">≡</span> Stark</li> | |
<li class="sortable"><span rel="reorder">≡</span> Lannister</li> | |
<li class="sortable"><span rel="reorder">≡</span> Baratheon</li> | |
<li class="sortable"><span rel="reorder">≡</span> Greyjoy</li> | |
</ul> |
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.sortable-list { | |
.sorting { | |
position: relative; | |
z-index: 1; | |
opacity: 0.85; | |
} | |
.sortable:not(.sorting) { | |
transition: transform 0.5s ease-out; | |
} | |
} |
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