d.barscale: add priviews to the manual

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@57735 15284696-431f-4ddb-bdfa-cd5b030d7da7

display/d.barscale/Makefile

@@ -8,3 +8,11 @@ DEPENDENCIES = $(DISPLAYDEP) $(SYMBDEP) $(GISDEP)
 include $(MODULE_TOPDIR)/include/Make/Module.make
 
 default: cmd
+
+# insert thumbnail previews
+$(PGM).tmp.html: $(BIN)/$(PGM)$(EXE)
+	$(call htmldesc,$<,$@)
+	sed 's!^<dd><b>\([a-z0-9._]*\)</b>:!<dd><img width="80" height="12" src="$(ETC)/gui/images/barscales/\1.png"> <b>\1</b>:!' "$@" > "$@.tmp"
+	mv -f "$@.tmp" "$@"
+
+.INTERMEDIATE: $(PGM).tmp.html

display/d.barscale/main.c

@@ -71,6 +71,31 @@ int main(int argc, char **argv)
 	"classic,line,solid,hollow,full_checker,part_checker,mixed_checker,tail_checker,up_ticks,down_ticks,both_ticks,arrow_ends";
     barstyle->answer = "classic";
     barstyle->guisection = _("Style");
+    G_asprintf((char **) &(barstyle->descriptions), 
+               "classic;%s;"
+               "line;%s;"
+               "solid;%s;"
+               "hollow;%s;"
+               "full_checker;%s;"
+               "part_checker;%s;"
+               "mixed_checker;%s;"
+               "tail_checker;%s;"
+               "up_ticks;%s;"
+               "down_ticks;%s;"
+               "both_ticks;%s;"
+               "arrow_ends;%s",
+               _("Classic style"),
+               _("Line style"),
+               _("Solid style"),
+               _("Hollow style"),
+               _("Full checker style"),
+               _("Part checker style"),
+               _("Mixed checker style"),
+               _("Tail checker style"),
+               _("Up ticks style"),
+               _("Down ticks style"),
+               _("Both ticks style"),
+               _("Arrow ends style"));
 
     coords = G_define_option();
     coords->key = "at";