1603618 - Get autoscrolling to work properly with desktop zooming

Status: RESOLVED DUPLICATE of bug 1557160

(Core :: Panning and Zooming, defect, P3)

Description

[Kris Taeleman (:ktaeleman)]

Attachment: desktopzooming.gif

STR:

Set preferences:

• apz.allow_zooming=true
• mousewheel.with_control.action=5

navigate to any page (ex: https://bugzilla.mozilla.org)
zoom in using ctrl-mouse scrollwheel

press and hold middle mousebutton on the mouse and hold in a direction
release middle mousebutton
repeat last 2 steps in a different location

Notice how the initial middle mouse click location is used as the center for scrolling instead of the new location.

Video attached that shows behavior.

Comment 1

[Botond Ballo [:botond]]

Autoscrolling (the middle-click based scrolling shown in the gif) does not even start for me on https://bugzilla.mozilla.org when zoomed in -- likely another bug.

It does on a different page, though (e.g. https://planet.mozilla.org/), and I do see that the autoscroll indicator's location does not match the location of the mouse click. Likely the calculation of the indicator's location does not take into account the resolution.

Comment 2

[Kartikaya Gupta (email:[e-mail])]

This seems to work fine for me. Tested on two different windows machines, with both ctrl-zooming (with mousewheel.with_control.action=5) and trackpad pinch-zoom. In both cases the autoscroll indicator showed up correctly and autoscrolling worked fine. Also tested on root scroller vs subframe and it seems ok.

Comment 3

[Kartikaya Gupta (email:[e-mail])]

mozregression says it was fixed here:

https://hg.mozilla.org/mozilla-central/rev/715ea15fc504bac27714c4c1a7ca4cd181e45f27

Comment 4

[Kartikaya Gupta (email:[e-mail])]

Whoops