[MacRuby-devel] Is this possible in MacRuby?

azzzz at gmx.net azzzz at gmx.net
Sat Nov 19 16:43:21 PST 2011

Hi Josh,

Ah I see, that makes sense now - as the app I wanted to replace (Afloat) installs SIMBL first - hence me wondering whether it might have been something possible with MacRuby (without SIMBL). 

Thanks for taking the time to reply, much appreciated.


On 20 Nov 2011, at 00:37, Joshua Ballanco wrote:

> On Thu, Nov 17, 2011 at 1:07 PM, azzzz at gmx.net <azzzz at gmx.net> wrote:
> Hi All,
> Is it possible to make a Lion app(/option) with MacRuby which allows you to change the opacity (alpha value) of other apps/windows via the View menu?
> So say I have a PDF open in Preview, I'd go to: view menu > transparency, and then set it to 50%
> Is this possible? Would it be a pain to do? I don't think I've seen any MacRuby apps that add functionality to other apps like this so am guessing it's not trivial.
> Hi Aston,
> Forgive the quick and dirty description... Properties of an application's windows are controllable by the operating system or the application itself. Allowing a different application access to the window is, generally speaking, a violation of process separation. That said, you might look into SIMBL. It allows you to inject code into a running process. Not as a separate process, but it is possible to modify an already running process.
> Hope that helps.
> - Josh
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