Getting Screen Resolution in Windows with Ruby

[Felipe Navas]

Hi, somebody knows how i can get Screen Resolution in Windows with Ruby ?
Anything stable please! And WinXp, Win98, Win95 compatible.

Cheers

 

[Wilson Bilkovich]

Hi, somebody knows how i can get Screen Resolution in Windows with Ruby ?
Anything stable please! And WinXp, Win98, Win95 compatible.

You can use the WIN32OLE library (or similar) to call the
GetSystemMetrics() function:
http://support.microsoft.com/kb/210603

 

[Felipe Navas]

Thanks Wilson!

require 'dl/import'
require 'dl/struct'

SM_CXSCREEN = 0
SM_CYSCREEN = 1

user32 = DL.dlopen("user32")

get_system_metrics = user32['GetSystemMetrics', 'ILI']
x, tmp = get_system_metrics.call(SM_CXSCREEN,0)
y, tmp = get_system_metrics.call(SM_CYSCREEN,0)

puts "#{x} x #{y}"

 

[jojohns1]

Here's a version for ruby 1.9 (the DL library changed)

require 'dl'

SM_CXSCREEN = 0
SM_CYSCREEN = 1

user32 = DL.dlopen("user32")
get_system_metrics = DL::CFunc.new(user32['GetSystemMetrics'], DL::TYPE_LONG)

x = get_system_metrics.call([SM_CXSCREEN])
y = get_system_metrics.call([SM_CYSCREEN])