wxModeler does not accept r.mapcalc action

[timmie]

Trying the modeler, it comes not possible to add a action using the r.mapcalc module.

[martinl]

The reason is that r.mapcalc in GRASS 6.5 doesn't use the parser, in the result wxGUI cannot generated dialog for this command. Try r.mapcalculator instead. This problem is not related to GRASS 7 (r.mapcalc uses in GRASS 7 the parser).

[glynn]

Replying to martinl:

The reason is that r.mapcalc in GRASS 6.5 doesn't use the parser, in the result wxGUI cannot generated dialog for this command. Try r.mapcalculator instead. This problem is not related to GRASS 7 (r.mapcalc uses in GRASS 7 the parser).

If you want "raw" r.mapcalc from the GUI, it wouldn't be particularly hard to add a front-end script which implements the 7.0 semantics (i.e. expression= and file= options). E.g. (untested, boilerplate omitted):

if [ -n "$GIS_OPT_EXPRESSION" ] ; then
    exec r.mapcalc "$GIS_OPT_EXPRESSION"
elif [ -n "$GIS_OPT_FILE" ] ; then
    exec r.mapcalc < "$GIS_OPT_FILE"
else
    echo "Either expression= or file= must be given" >&2
    exit 1
fi

[martinl]

Replying to glynn:

If you want "raw" r.mapcalc from the GUI, it wouldn't be particularly hard to add a front-end script which implements the 7.0 semantics (i.e. expression= and file= options). E.g. (untested, boilerplate omitted):

done in r48861.