On Thursday 22 of December 2011 09:43:28 Felipe Monteiro de Carvalho wrote: > On Thu, Dec 22, 2011 at 9:15 AM, <michael.vancann...@wisa.be> wrote: > > As I understand it, Delphi and Lazarus implement the former, and don't > > need a timeout for it. > > Ops, you are correct, it is a one shot event: > > http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate > 2/EN/html/delphivclwin32/Forms_TApplication_OnIdle.html > > I think I implemented it as a repetitive event. ops =D I guess I'll > need to fix this. > > But you should not try to compare directly the LCL gtk2 or qt4 > widgetsets with fpgui since gtk2 and qt4 do most of the real work. > Lazarus now has a X11 interface which can be used for direct > comparisons and it uses the timeout. In general I don't fully trust > select() to wakeup correctly yet. I guess that more testing would show > if it does, but I read in the web that X11 could use more then one > file descriptor for communication, so if I use a infinite select() the > application could hang in some corner cases.
FYI, qt and gtk2 uses same source for timers and loops - glib2. http://en.wikipedia.org/wiki/GLib http://developer.gnome.org/glib/2.26/glib.html I would try with it before reinventing wheel, because it works on all X11 platforms (even on OS/2 and BeOS) and I'm pretty sure that it's installed by default. zeljko
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