[R-SIG-Mac] sizing of quartz and x11 windows

[Parlamis Franklin]

quartz(w=3,h=3) gives me a 2 6/32" square window (not including the  
banner, but including the resizing square).

the measured discrepency between x11 and quartz seems to scale  
linearly with the size of the windows (an x11 window being 1/64, 6/64  
and 12/64" bigger in the 1, 3 and 6" cases), but for both x11 and  
quartz the resizing square is within the measured square region, so i  
am not sure the resizing square is the source of the discrepency.

i am more wondering why 3" in the function call turns into 2 6/32"  
displayed.  is this a standard error for everyone, or is it just my  
monitor/card-combo that creates it?  and if it's standard, why have a  
function that purports to deliver a measurement?

On Dec 4, 2005, at 11:42 PM, stefano iacus wrote:

> The general answer is that your pixels are not squares but they are  
> vertical rectangles, so what you expect is not what you see.
> As for the small difference in quartz vs x11 I think is because of  
> the resizing square at the bottom-right of the quartz window. So  
> you should measure up to that square and you should get the same  
> height.
> You should notice this effect by creating 3x3 window and look that  
> indeed it appears as a rectangle.
> hope this helps
> stefano
>
>
>
> On Dec 5, 2005, at 5:28 AM, Parlamis Franklin wrote:
>
>> whenever i open an x11 or quartz window, the dimensions of the window
>> are roughly 74% and 72%, respectively, of what i call for.  for  
>> example:
>>
>> quartz(width=3, height=4) leads to a window that is roughly 2.15
>> inches by 2.9 inches, and
>> x11(width=3, height=4) leads to a window that is roughly 2.21 inches
>> by 3 inches
>>
>> i am using dual apple cinema 23" displays set at the 1920x1200
>> resolution.
>>
>> can anyone point me in the direction of understanding why this is
>> happening?
>>
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>