Ace (the underlying code editor) uses a very normal approach to element structure (editor is a scrolling box with line elements inside), and Electron (read: Chromium) doesn’t have the same quirk as Firefox does (where scrolling speed is affected by font size) so there is no apparent reason for this to happen.
Does this also happen in
a) Web version of GMEdit (it’s slightly out of date but the starting page should be good to check with)
b) Ace’s demos
?
I tried both web GMEdit, and Ace's demos and both behave the same. They jump by around 9 lines. I thought it was perhaps because of the Magic Mouse, but I tried two other Microsoft common mice, and the behaviour is the same. It just jumps by 9 as soon as I scroll the wheel by one "click". I don't see this behaviour in any other app though. Scrolling behaves normally even in the tree-view of GMEdit.
If it happens in Ace’s demos, it would be something to report for it along with reproduction steps.
For a workaround, you can try opening ace.js in a text/code editor, finding this bit (around line 1503 as of writing), and editing the factor to be a higher value
if ("onmousewheel" in el) {
exports.addListener(el, "mousewheel", function(e) {
var factor = 8;
if (e.wheelDeltaX !== undefined) {
e.wheelX = -e.wheelDeltaX / factor;
e.wheelY = -e.wheelDeltaY / factor;
} else {
e.wheelX = 0;
e.wheelY = -e.wheelDelta / factor;
}
callback(e);
});
(maybe also add a console.log(e.wheelDeltaX, e.wheelDeltaY, e.wheelDelta) and let me know what the values are)
Perfect! I changed the factor from 8 to 64 and it's working as expected.
I also added the console logs and this a sample of what I was seeing when scrolling:
ace.js:1513 0 -300 -300
ace.js:1513 0 -1200 -1200
ace.js:1513 0 -1500 -1500
ace.js:1513 0 -600 -600
3ace.js:1513 0 -300 -300
ace.js:1513 0 -2400 -2400
ace.js:1513 0 -300 -300
ace.js:1513 0 -900 -900
3ace.js:1513 0 -300 -300
ace.js:1513 0 -1200 -1200
ace.js:1513 0 -300 -300
ace.js:1513 0 -1200 -1200
2ace.js:1513 0 -900 -900
2ace.js:1513 300 0 300
7ace.js:1513 0 300 300
40ace.js:1513 0 -300 -300
ace.js:1513 300 0 300
15ace.js:1513 0 -300 -300
ace.js:1513 300 0 300
Do you think I should still report the issue in the link you provided?