[Blindmath] graphics

[Michael Whapples]

As mentioned by someone else, the answer of what size it is depends on what 
display is being used as they can have different resolutions and people may 
not have their monitor set to the native resolution. Also it is worth noting 
that normally the higher resolution monitors are larger monitors anyway. You 
probably cannot guarantee what physical size something will have by defining 
the dimensions in pixels, however probably choosing something reasonable on 
yur system probably in most cases will give reasonable sizes for others.

It may also be worth considering what is a reasonable size? I don't know if 
the operating system suppliers have guidelines (I know Apple do have UI 
guidelines for developers but I don't know if that includes recommendations 
on sizes for different types of controls). Another source of what might be 
reasonable, look at a few programming tutorials for the UI toolkit you will 
be using and see what is commonly used for different types of controls.

Michael Whapples

-----Original Message----- 
From: Haden Pike
Sent: Saturday, February 11, 2012 8:47 PM
To: blindmath at nfbnet.org
Subject: [Blindmath] graphics

Hi all,

This might be off topic for this list, but figured I'd ask here in case
there's a mathematical formula for figuring out what I need.

Anyway, as part of my intro to programming class, we are being asked to
draw graphics on the screen in order to learn about objects.  I already
know about them,
but this class is required for Computer science majors, so I still have
to do the assignment.  My question is this.  Is there any way a blind
person can
hope to get a since of what size something is, when specified in
pixels?  For example, if I gave a rectangle a width of 100 pixels and a
height of 150
pixels, how could I determine what size the rectangle will be on the
screen.

Thanks for any help,
Haden


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