Proofreading page -- scroll should scroll down, not zoom out

[epicfaace]

When you scroll the mouse when hovering over the text view on the proofreading page, it currently just adjusts the zoom. It would be more useful if it instead scrolled up / scrolled down.

[shreevatsa]

+1, I also found the zoom-on-scroll disorienting and was thinking of reporting this.

I wanted to say "we should do what Google Maps does" and went to look at it, but to my surprise Maps too uses scroll for zoom and click+scroll for panning the image, but I don't find it so disorienting. Maybe it's because of the scroll acceleration or something (Maps scrolls more slowly at first).

[akprasad]

Maybe it's because of the scroll acceleration or something (Maps scrolls more slowly at first).

For me, I think it's because Google maps is a very dense "image" that can be as zoomed out as a continent and as zoomed in as a specific street. That's also the main use case for OpenSeadragon (our image library), which is optimized for dense images of this kind.

For our use case, however, we have a simple image that can be seen all at once, and I expect your intuitions (like mine) expect this to act more like a PDF.

~

I agree with this issue. The fix here is to tweak our OpenSeadragon plugin settings in proofer.js to change from "scroll to zoom" to "scroll to pan," perhaps just by setting scrollToZoom = false (https://openseadragon.github.io/docs/OpenSeadragon.html).

[akprasad]

Seems it's more complicated:

https://github.com/openseadragon/openseadragon/issues/1228