Have we got a dev blog about this sort of thing? Or perhaps a wiki page. On 16 November 2014 09:41, Vesa <dii....@nbl.fi> wrote: > Since one contributor recently asked about signals and slots, I thought > it'd be good to write a bit about them. > > The Qt documentation already explains them pretty extensively, so if you > just need help with the syntax or such, that is the place to look in: > http://qt-project.org/doc/qt-4.8/signalsandslots.html > > However, I should write a bit about how to use them properly in the > context of LMMS. Which they currently aren't always. > > Signals and slots should be reserved mostly for GUI events that need to > trigger some kind of single action. For example, connecting the signal > triggered by the clicking of a button to a slot function which closes > the window, sets some flag/variable/state, triggers some other GUI event > etc. This is perfectly fine signal/slot usage. > > They should not be used in DSP, audio processing, or any kind of > speed-critical code. A common way I see them used (which I've also done > myself before I knew better) is to trigger some change or calculation > when a knob value is altered. This practice should be phased out and the > existing offenders altered. > > Signals and slots are great for flexibility and abstraction and such. > Their disadvantage is that they're much slower than simply calling the > function directly. So they shouldn't be used for DSP code nor anywhere > that needs to be fast and/or low-latency. > > ------------------------------------------------------------------------------ > Comprehensive Server Monitoring with Site24x7. > Monitor 10 servers for $9/Month. > Get alerted through email, SMS, voice calls or mobile push notifications. > Take corrective actions from your mobile device. > http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk > _______________________________________________ > LMMS-devel mailing list > LMMS-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/lmms-devel
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