Hi Chris, Thanks for the explanation that helps a lot in understanding what the heck is going on. I do mostly monkey see, monkey do programming so understanding more slowly changes that...
John On 9/1/2012 9:50 AM, Chris Morley wrote: > > >> Date: Sat, 1 Sep 2012 08:05:45 -0500 >> From: bjt...@gmail.com >> To: emc-users@lists.sourceforge.net >> Subject: [Emc-users] Postgui >> >> I'm trying to decipher how to have a postgui hal file with my custom >> GUI. The following snippet I assume does the magic of loading the >> postgui file. Some I understand and some I don't. >> >> if __name__ == "__main__": >> if len(sys.argv) > 2 and sys.argv[1] == '-ini': >> print "ini", sys.argv[2] >> hwg = touchy(sys.argv[2]) >> else: >> hwg = touchy() >> res = os.spawnvp(os.P_WAIT, "halcmd", ["halcmd", "-f", >> "touchy.hal"]) >> if res: raise SystemExit, res >> # load a postgui file if one is present in the INI file >> postgui_halfile,inifile = touchy.postgui(hwg) >> print "TOUCHY postgui filename:",postgui_halfile >> if postgui_halfile: >> res = os.spawnvp(os.P_WAIT, "halcmd", ["halcmd", >> "-i",inifile,"-f", postgui_halfile]) >> if res: raise SystemExit, res >> gtk.main() >> >> The line hwg = touchy(sys.argv[2]) what is that doing? >> >> Also what is postgui_halfile,inifile = touchy.postgui(hwg) doing? >> Somehow it seems that postgui_halfile is being set to > 0 if one is >> found in the ini file but I don't understand how that line does that? >> >> Thanks >> John > If you want to do substitution in the post gui hal file you must tell > halcmd where the ini file is. > Some of the weirdness of this code is because it is outside the touchy class > so you must call methods with the class name rather then using the usual self. > > if __name__ == "__main__": > if len(sys.argv) > 2 and sys.argv[1] == '-ini': > print "ini", sys.argv[2] > hwg = touchy(sys.argv[2]) > else: > hwg = touchy() > > This looks for the a -ini switch that directly specifies an INI path. > else does not specify and INI path > Then it initializes an instance of the touchy class called hwg, > either with the specified INI path or without. > > res = os.spawnvp(os.P_WAIT, "halcmd", ["halcmd", "-f", > "touchy.hal"]) > if res: raise SystemExit, res > > This loads touch.hal file by spawning an instance of halcmd > and letting it do it's thing. no ini substitution is possible. > if there is an error in the hal file touchy exits with error. > > > # load a postgui file if one is present in the INI file > postgui_halfile,inifile = touchy.postgui(hwg) > print "TOUCHY postgui filename:",postgui_halfile > > This calls a method INSIDE the touchy class so instead of self > we use hwg (the instance name we gave it a couple lines ago) > the method postgui() looks for the postgui filename in the INI file > from the config that was started from and returns the postgui file name and > the INI path > > if postgui_halfile: > res = os.spawnvp(os.P_WAIT, "halcmd", ["halcmd", > "-i",inifile,"-f", postgui_halfile]) > if res: raise SystemExit, res > > So here we check to see if there was a postgui file name and if so > we spawn another halcmd to load it. This time we allow INI substitution. > again if there is an error we exit the program with an error message. > > gtk.main() > > Of course gtk.main() starts monitoring signals from our program. > > Hope that helps John! > Chris M > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
