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Fix resizer/sizer.js mouse event offset calculation

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The event coordinates are document coordinates, so the offset they are
compared to should also be the document one.

Signed-off-by: Pauli Virtanen <pav@iki.fi>
This commit is contained in:
Pauli Virtanen 2020-04-21 00:41:58 +03:00
parent 2e7bd2e3f0
commit 11438aeee6
1 changed files with 14 additions and 2 deletions
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16
src/resizer/sizer.js
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@ -56,6 +56,18 @@ export default class Sizer {
return this.vertical ? this.container.offsetTop : this.container.offsetLeft;
}
/** @return {number} container offset to document */
_getPageOffset() {
let element = this.container;
let offset = 0;
while (element) {
const pos = this.vertical ? element.offsetTop : element.offsetLeft;
offset = offset + pos;
element = element.offsetParent;
}
return offset;
}
setItemSize(item, size) {
if (this.vertical) {
item.style.height = `${Math.round(size)}px`;
@ -80,9 +92,9 @@ export default class Sizer {
offsetFromEvent(event) {
const pos = this.vertical ? event.pageY : event.pageX;
if (this.reverse) {
return (this._getOffset() + this.getTotalSize()) - pos;
return (this._getPageOffset() + this.getTotalSize()) - pos;
} else {
return pos - this._getOffset();
return pos - this._getPageOffset();
}
}
}