supernets/hardlounge
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Handle scrolls 0-45° as horizontal (opening the menu); 45-90° as vertical (chat scroll)

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This commit is contained in:
Jérémie Astori 2018-03-18 01:18:43 -04:00
parent 6828cd1075
commit 8100f98d6b
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GPG Key ID: B9A4F245CD67BDE8
1 changed files with 16 additions and 12 deletions
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28
client/js/slideout.js
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@ -48,34 +48,38 @@ function onTouchStart(e) {
function onTouchMove(e) {
const touch = touchCurPos = e.touches.item(0);
let setX = touch.screenX - touchStartPos.screenX;
let distX = touch.screenX - touchStartPos.screenX;
const distY = touch.screenY - touchStartPos.screenY;
if (!menuIsMoving) {
const devicePixelRatio = window.devicePixelRatio || 2;
if (Math.abs(touch.screenY - touchStartPos.screenY) > devicePixelRatio) {
// tan(45°) is 1. Gestures in 0°-45° (< 1) are considered horizontal, so
// menu must be open; gestures in 45°-90° (>1) are considered vertical, so
// chat windows must be scrolled.
if (Math.abs(distY / distX) >= 1) {
onTouchEnd();
return;
}
if (Math.abs(setX) > devicePixelRatio) {
const devicePixelRatio = window.devicePixelRatio || 2;
if (Math.abs(distX) > devicePixelRatio) {
viewport.classList.toggle("menu-dragging", true);
menuIsMoving = true;
}
}
if (menuIsOpen) {
setX += menuWidth;
distX += menuWidth;
}
if (setX > menuWidth) {
setX = menuWidth;
} else if (setX < 0) {
setX = 0;
if (distX > menuWidth) {
distX = menuWidth;
} else if (distX < 0) {
distX = 0;
}
menu.style.transform = "translate3d(" + setX + "px, 0, 0)";
sidebarOverlay.style.opacity = setX / menuWidth;
menu.style.transform = "translate3d(" + distX + "px, 0, 0)";
sidebarOverlay.style.opacity = distX / menuWidth;
}
function onTouchEnd() {