David Dixon wrote:
Not quite right im afraid. Patrick Lauke sent an email about this in
December that highlighted the Firefox zoom config as shown below:
-- Quote --
toolkit.zoomManager.zoomValues, and this will show the various zoom
factors at each step. In my case (which should be the default) these
are:
.3, .5, .67, .8, .9, 1, 1.1, 1.2, 1.33, 1.5, 1.7, 2, 2.4, 3
So, nominally 200% (which, according to the "Understanding..." bit
for that SC, means "200%, that is, up to twice the width and height"
- so really a 400% increase in total area) is actually 6 steps, if
you want to go purely by numbers.
-- End Quote --
David
Ok, but then 200% 'whole page zoom' in Opera and IE8rc1 is _much more_
than 200%, because when I overlay Firefox (3.0.5 & 3.1b2) with 'text
only zoom' on any of these two (Opera and IE) at that 200% 'whole page
zoom', I need 10 mouse-wheel steps up from default (100%) to reach the
text-size and line-height they're at (at 200%), as shown below.
Gunlaug Sørtun wrote:
Side-by-side comparison and measuring on various OSes (96dpi res.
all to avoid any misunderstandings) reveals the following:
- Firefox (3.0.5 & 3.1b2) seems to increment in 10% mouse-wheel
steps for both 'text zoom' and 'whole page zoom'. That means 10
steps (or clicks) from "default" to "200% of default" for both zoom
variants.
Both Opera and IE8rc1 have 'whole page zoom' selectors showing 200% as a
value - seen in the lower-right corner of their chrome, and I can't
imagine that these two (competing) browsers agree that 200% means
exactly the same and that this "same value" is then *not* really 200%.
I also cross-checked using the same screens (96dpi res.), OSes (win2K,
XP, Vista, Ubuntu) and mouse/keyboard (connected via Synergy), and can't
find the cause for my errors.
Rounding-errors caused by trying to hit the same number of screen pixels
at the same resizing levels via different calculation algorithms, become
insignificantly small at 200% resizing level.
Maybe someone can do a control check, measure the actual sizes on screen
for zoom values and mouse-wheel resizing steps for 'text resizing' vs
'full page zoom' set at shown values, and let us know the results.
regards
Georg
--
http://www.gunlaug.no
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