[PD-dev] Canvas and ojb/cnv arguments in .pd

[IOhannes m zmoelnig]

Dave S wrote:
> Hello all,

> 
> So, the question stands:
> What is the last argument of [cnv] for?
> 
> AS IN:
> #X obj 0 0 cnv 15 768 22 cnv_heading_S cnv_heading_R All_About_Canvases 12
> 12 0 14 -233017 -1 0;
> 
> 
> Does anybody know?

yes, thomas, who is the author of this object should know (tomorrow, 
when he is in the office i could ask him)

apart from that, the source-code should know....

the arguments for the iemguis (these are the ones where you get the 
fancy properties dialog) have undergone several generations of change.
so it could be, that the last argument is just there for compatibilites 
sake. (i tried talking thomas into putting an "API-version"-argument 
into the argument list to make the parsing simpler, but to no avail)

furthermore, parts of the argument-handling are handled by a general
"iemgui_args"-function. it might be, that this general approach has some 
leftovers, e.g. unused arguments.

looking at the c-code of the [cnv] (g_mycanvas.c, g_all_guis.c) it 
seems, like the latter case is at least "not wrong". the value of the 
13th argument is used to turn on a "loadinit"-value (important for 
[loadbang]-behaviour of e.g. [bng]; should be totally unused in the 
[cnv]-case) and a "scale"-value (i think this turns on/off the "scale" 
at the [vu])

anything clear?

mfg.asd.r
IOhannes