Re: getting a list of connected displays

FROM : Shawn Erickson
DATE : Thu Nov 25 17:56:00 2004

On Nov 25, 2004, at 2:50 AM, Alex Reynolds wrote:

> Can anyone provide advice on how to get a list of monitor models 
> connected to the system programatically?
>
> For example, on my Mac, I have an Apple Studio Display and a Dell 
> 1504FP.
>
> These device names are listed in the Displays system preference 
> applet. I would like to get these model names into an array or 
> dictionary so that I can use them elsewhere.
>
> Any help would be appreciated!


For device information such as this one can likely mine the ioregistry 
[1].

As an example...

[G5:~] shawnce% ioreg -c AppleDisplay | grep DisplayVendorID
    | |    |  |      "DisplayVendorID" = 1552
    | |    |  |      "DisplayVendorID" = 1552

Anyway you can search the ioregistry programatically. See the following 
links as a starting point...

<http://developer.apple.com/documentation/DeviceDrivers/Conceptual/
AccessingHardware/AH_Finding_Devices/chapter_4_section_2.html#//
apple_ref/doc/uid/TP30000379/TPXREF108>

<http://developer.apple.com/documentation/Darwin/Reference/IOKit/
IOKitLib/index.html>

-Shawn

[1] 
<http://developer.apple.com/documentation/DeviceDrivers/Conceptual/
IOKitFundamentals/TheRegistry/chapter_4_section_1.html#//apple_ref/doc/
uid/TP0000014>