Re: [Gpsbabel-code] Position Filter, Distance Value

[Ron P. <ro...@pa...>]

Andy Armstrong wrote:
>
> Similarly it'd be nice to attach deeper semantics to some of the 
> option types - for example in some cases a string option will always 
> refer to a file - so it'd be nice to have something like
>
> option    blah    namesfile    File with names for something    
> string.file.read    r-----
>
> to indicate an option that is applicable to reading and which 
> specifies an input file.

 From defs.h:

#define ARGTYPE_UNKNOWN    0x00000000
#define ARGTYPE_INT        0x00000001
#define ARGTYPE_FLOAT      0x00000002
#define ARGTYPE_STRING     0x00000003
#define ARGTYPE_BOOL       0x00000004
#define ARGTYPE_FILE       0x00000005
#define ARGTYPE_OUTFILE    0x00000006


ARGTYPE_FILE gets used for the arc filter (and the polygon filter, and 
the xcsv reader):

[ron@mail gpsbabel]$ gpsbabel -%1 | grep arc
arc     Include Only Points Within Distance of Arc
option  arc     file    File containing vertices of arc file
...

and ARGTYPE_OUTFILE gets used for tiger:

[ron@mail gpsbabel]$ gpsbabel -^3 | grep tiger
file    rw----  tiger           U.S. Census Bureau Tiger Mapping 
Service       tiger
option  tiger   nolabels        Suppress labels on generated pins       
boolean
option  tiger   genurl  Generate file with lat/lon for centering map    
outfile
...

Notice that the argument types are not a bitfield, so there's currently 
space for 4096 total types.  There's also room for 13 more flags, so an 
input/output flag would be quite doable.   Note that its semantics would 
in fact be different from the semantics of FILE/OUTFILE, which don't 
specify when the option should be exposed but rather whether the File 
Open or File Save dialogs should come up in your GUI.