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05.14.2007 at 12:57PM PDT, ID: 22571468
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how to programmatically start the default screensaver?

Tags: screensaver, programmatically, start
is there any API / function that would allow me to programmatically start the default screensaver on mac os x?
preferably from a simple command line application, but a cocoa sample code would be also appreciated.

thanks
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Question Stats
Zone: Apple
Question Asked By: urif
Solution Provided By: RaddishIoW
Participating Experts: 2
Solution Grade: A
Views: 23
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05.15.2007 at 06:08AM PDT, ID: 19092376

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05.15.2007 at 08:42PM PDT, ID: 19098331

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05.16.2007 at 03:03AM PDT, ID: 19099522

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05.16.2007 at 09:52AM PDT, ID: 19102305

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05.16.2007 at 10:08AM PDT, ID: 19102442

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05.16.2007 at 08:37PM PDT, ID: 19105907

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05.15.2007 at 06:08AM PDT, ID: 19092376
SleepTight:

http://www.ragingmenace.com/software/sleeptight/index.html

Its open source and will start a screen saver, it uses Objective-C so if you were dying to find out how it starts a screensaver you could read through the code. However if all you want is to be able to start the screensaver (presumably to lock your screen?) then this will do the trick.
 
05.15.2007 at 08:42PM PDT, ID: 19098331
i do want to learn how to do it, i need to add it a program i am writing. let me see if i can spot the function inside the code.
 
05.16.2007 at 03:03AM PDT, ID: 19099522
All you need to do is take the ScreenSaverControl.h file from SleepTight and add it to your project, then add the ScreenSaver.framework.
Then, in awakeFromNib or similar:

ssControl = [[ScreenSaverController controller] retain];
      if (!ssControl) {
            // Report error
      }

Then, when you want to start the screen saver, call

[ssControl screenSaverStartNow];

Try that. :-)
Accepted Solution
 
05.16.2007 at 09:52AM PDT, ID: 19102305
thanks, i am getting all kind of missing headers. apparently something is missing.
when you say "add the ScreenSaver.framework", you mean....?
i'm an old time UNIX programmer, only recently i started coding GUI's for Mac
 
05.16.2007 at 10:08AM PDT, ID: 19102442
:-)
Ok, with your project open in Xcode, select Add to Project from the Project menu.
In the open sheet that appears, navigate to /Developer/SDKs/<your target sdk>/System/Library/Frameworks/, where <your target sdk> is the version of Mac OS X you are targeting (usually MacOSX10.4u.sdk).
Select the folder named "ScreenSaver.framework", then click Add.
In the next sheet that opens, check that the "Copy items to ..." isn't checked, then click Add.
This will add the ScreenSaver framework to your project, and you should now be able to build and run your project.
 
05.16.2007 at 08:37PM PDT, ID: 19105907
thanks, that did the trick. the resulting binary is bigger than i wanted but it did work, so it goes to you.
i still don't understand why i need to set my program as a "screensaver" in order to start the default screensaver, but hey, i am learning.
thanks again
 
 
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