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Simplify onWheel handler

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This commit is contained in:
toasted-nutbread 2019-10-02 20:57:48 -04:00
parent 0d6177398d
commit 7380ada1f1
1 changed files with 5 additions and 13 deletions
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18
ext/mixed/js/display.js
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@ -161,20 +161,12 @@ class Display {
} }
onWheel(e) { onWheel(e) {
const handler = () => { if (e.altKey) {
if (e.altKey) { const delta = e.deltaY;
if (e.deltaY < 0) { // scroll up if (delta !== 0) {
this.entryScrollIntoView(this.index - 1, null, true); this.entryScrollIntoView(this.index + (delta > 0 ? 1 : -1), null, true);
return true; e.preventDefault();
} else if (e.deltaY > 0) { // scroll down
this.entryScrollIntoView(this.index + 1, null, true);
return true;
}
} }
};
if (handler()) {
e.preventDefault();
} }
} }