211441 - javascript/DOM does not pick up on changes to screen.width & screen.height when screen resolution is changed

Status: VERIFIED DUPLICATE of bug 62395

(Core :: DOM: Core & HTML, defect)

Description

[Ken Guest]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.3) Gecko/20030312

on Windows 2000, did a 
javascript:alert(screen.width + ' ' + screen.height);
before and after changing the resolution of the screen.

javascript did not pick up on the new size.

Reproducible: Always

Steps to Reproduce:
1. run javascript:alert(screen.width + ' ' + screen.height);
2. note what you are told
3. change the screen resolution
4. again, run javascript:alert(screen.width + ' ' + screen.height);
5. note values are the same - they should be different!

Comment 1

[Boris Zbarsky [:bzbarsky]]

*** This bug has been marked as a duplicate of 62395 ***

Comment 2

[Ken Guest]

this is not a duplicate of <a
href="http://bugzilla.mozilla.org/show_bug.cgi?id=62395">62395</a> - I am
talking about when the screen resolution is changed when mozilla is running.

it is a kludge (http://www.cnam.fr/Jargon/jargon.html?1007) to require users to
restart Mozilla after  screen resolution has been changed.

Other apps on Windows are intelligent enough to trap the appropriate Windows
message and react accordingly.
So should Mozilla.

Comment 3

[Johnny Stenback (:jst)]

Ken, you said:

> this is not a duplicate of bug 62395 - I am talking about when the screen
> resolution is changed when mozilla is running.

Unless I missed something obvious in bug 62395, that bug is about exactly that
problem. Duping again, if you still think this is not a dupe, then please
explain exactly why it isn't.

*** This bug has been marked as a duplicate of 62395 ***

Comment 4

[Ken Guest]

Mozilla/Javascript does not display/retrieve the correct screen.height and
screen.width values after the screen resolution has been changed while Mozilla
is running.
Example:
1  Start Mozilla with screen resolution set to 1280x1040
2  Display the screen.width and screen.height values with   
   javascript:alert(screen.width + ' ' + screen.height);
   ("1280 1040" displayed in alert box).
3  Change the screen resolution to 1024x768
4  Display the screen.width and screen.height values with   
   javascript:alert(screen.width + ' ' + screen.height);
   ("1280 1040" displayed in alert box).

Note "1280 1040" is still displayed - it should be "1024 768".

The correct values are displayed only if I do step 4 in a new window, created
after step 3 has been done.
I certainly shouldn't have to restart Mozilla.

you should be trapping for the the system message that signifies a change in
screen resolution and updating the screen object's property values afterwards.

Comment 5

[Johnny Stenback (:jst)]

Ken, that is exactly the same problem that bug 62395 is about, I don't see a
difference in what you're describing and what bug 62395 is about. See bug 62395,
comment #2, for an explanation on exactly what the problem with Mozilla is, once
that's fixed, then this will be fixed too.

Duping again, if you still think that this is not a dupe, then reopen again, but
explain why this is different than bug 62395.

*** This bug has been marked as a duplicate of 62395 ***

Comment 6

[Henrik Skupin [:whimboo][⌚️UTC+1]]

verified.