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When scrolling using the mouse wheel scroll in Google Chrome, there is about 25% chance it would zoom in/out as if I have pressed the Ctrl key.

Disabling my mouse gesture extension reduces the chance to only about 2%.

I have tried various extensions and noticed some mouse gesture extensions seem to make it a bit worse than the others. I am guessing the problem is with Chrome or its extensions.

I believe it is not my hardware or software.

  1. It happens in Chrome on both my Windows 7 desktop computers at work and at home
  2. It never happens in Firefox on either computer (I use both browsers)
  3. I tried turning on "Show location of pointer when I press the CTRL key" so I know if the Ctrl is pressed accidentally - it never was.
  4. I don't have AutoHotKey or anything similar installed on Windows.

Is this a Google Chrome bug? Is there a workaround?

UPDATE:
I installed AutoHotKey to nullify Ctrl+scroll.
Ctrl+scroll now does nothing, but scrolling normally still often zooms.

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2 Answers 2

up vote 4 down vote accepted

Dont know where from this problem comes. but we can have an alternative solution to that. Depending on the drivers for your mouse, you could set ctrl-scroll as a "shortcut" to actually do nothing - essentially capturing the combination and throwing it away. Some drivers will even let you specify this for only within a certain application, at which point you'd specify chrome.

OR

Another trick would be:

solution using AutoHotKey posted on google groups:

Using Logitech Performance Mouse MX...

Downloaded AutoHotKey software

In the AutoHotkey.ahk file, added these to do nothing for Cntrl+MouseWheelScrolling

^WheelDown::return

^WheelUp::return

http://productforums.google.com/d/msg/chrome/-rtDLZmN9bk/5pJYksjrvQUJ

Also if this doesn't work, please provide some more information about your hardware please..

UPDATE - The solution

It looks like the zooming issue is related to mouse scrolling freeware. I took a look at a tool I run called "WizMouse." The purpose of these tools is to allow scrolling windows without focusing on them. Settings can be changed in these to fix the problem.

Resolutions:

  • KatMouse (per nsx82): Add class: Chrome_WidgetWin_1, and under the settings tick option: "Window has scrolling wheel support?" (try checked first)
  • WizMouse (per JoPa Mi): Uncheck "Enable mouse wheel for applications without mouse wheel support"
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It doesn't work, interesting... Now I can't zoom anymore by using Ctrl+scroll, but scrolling normally (without pressing Ctrl) still often zooms! My home and office hardware are quite different, I doubt it is the hardware. But what do you need to know? –  Aximili Jan 29 at 3:45
2  
It looks like the zooming issue is related to mouse scrolling freeware. I took a look at a tool I run called "WizMouse." The purpose of these tools is to allow scrolling windows without focusing on them. Settings can be changed in these to fix the problem. Resolutions: KatMouse (per nsx82): Add class: Chrome_WidgetWin_1, and under the settings tick option: "Window has scrolling wheel support?" (try checked first) WizMouse (per JoPa Mi): Uncheck "Enable mouse wheel for applications without mouse wheel support" ehiti.de/katmouse –  Rachit Pathak Jan 29 at 4:42
1  
Wow how could you even think of that. I'm in the office, did what you said to my KatMouse and so far the scroll has been perfect! But I don't even have KatMouse at home... but may be a similar software, I'll check it at home. –  Aximili Jan 31 at 5:36
1  
I think it solved the problem! I'm adding your comment that solved the problem into your answer, and accepting that. Thank you Rachit! –  Aximili Feb 3 at 3:00

Here's an AutoHotKey script that will remove the Ctrl+Wheel gesture from just Chrome and leave it for other appliations:

;Disable mouse wheel zooming in Chrome 
#IfWinActive, ahk_class Chrome_WidgetWin_1 
    ^WheelDown::return 
#IfWinActive, ahk_class Chrome_WidgetWin_1 
    ^WheelUp::return 
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protected by Community Dec 16 at 2:05

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