I am writing a Qt application that does some heavy computations, but on a Mac (potentially also on Windows but I currently have no way of checking this), the execution ceases as soon as the computer goes into sleeping mode.
I would like a way to continue the execution even when the screen goes to screensaver or on blank. Obviously you can ask the user to change his/her energy settings, but that's far from an ideal solution. Is there a proper way of doing this?
After a thorough search through the Qt 5.2 API, it seems that Qt doesn't offer any functionality to change the energy settings (so neither for Mac, nor any other operating system). I haven't found any indication that it's on their road map either.
A possible solution for Mac OSX using Apple's Objective-C API can be found here (thanks, @Kuba).
On Windows, power settings can be dealt with using the SetThreadExecutionState function (see this question, C#).