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[ts] Use CSS transformX instead of left for performance.

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This commit is contained in:
NathanSweet 2016-09-04 13:51:09 +02:00
parent 40f192de43
commit cf08ed3293
1 changed files with 7 additions and 5 deletions
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12
spine-ts/webgl/demos/utils.js
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@ -67,10 +67,14 @@ var spineDemos = {
$(".slider").each(function () { $(".slider").each(function () {
var div = $(this), handle = $("<div/>").appendTo(div); var div = $(this), handle = $("<div/>").appendTo(div);
var bg = div.hasClass("before") ? $("<span/>").appendTo(div) : null; var bg = div.hasClass("before") ? $("<span/>").appendTo(div) : null;
var hw = handle.width(), value = 0, object; var hw = handle.width(), value = 0, object, lastX;
handle = handle[0];
function positionHandle (percent) { function positionHandle (percent) {
var x = (div.width() - hw - 2) * percent; var x = Math.round((div.width() - hw - 2) * percent);
handle[0].style.left = x + "px"; if (x != lastX) {
handle.style.transform = "translateX(" + x + "px)";
lastX = x;
}
if (bg) bg.css("width", x + hw / 2); if (bg) bg.css("width", x + hw / 2);
value = percent; value = percent;
} }
@ -93,8 +97,6 @@ var spineDemos = {
set: positionHandle, set: positionHandle,
get: function () { return value; } get: function () { return value; }
}); });
div[0].handle = handle;
div[0].positionHandle = positionHandle;
}); });
} }
})(); })();