I am trying again to understand control of map elements, independent of the
standard map header. For now just considering scale-bars and north-arrows.
The Therion Book, page 70 says…
North arrow and scale bar may be displayed using
* \ifnortharrow ▷ conditional; true if map projection is plan and symbol
north-arrow
is not hidden in layout
* \ifscalebar ▷ conditional; true if scalebar is not hidden
>From this, I assume that the following statements in a layout should
prevent a north-arrow and scale-bar from being output.
symbol-hide special north-arrow
symbol-hide special scale-bar
However I find that these elements are always output regardless of the
layout. ie the symbol-hide statements have no effect for the special
symbols, even though they work just fine for groups, lines and points.
This is an example of what I am using;
\def\maplayout{
\legendbox{100}{100}{NW}{\the\legendcontent} %insert default header with
cave name, northarrow, scalebar, statistics etc
\legendbox{17}{00}{N}{\northarrow } %insert just a northarrow
\legendbox{17}{-100}{N}{\scalebar} %insert just a scalebar
}
I have also tried the likes of ;
\legendbox{17}{-100}{N}{\ifscalebar\scalebar\fi } %try to insert a
scalebar only if not hidden
But this does not work either, as the scale-bar is still always output
regardless of symbol-hide.
Am I misunderstanding the usage of symbol-hide for special symbols, or have
I broken something, or could there be a bug?
Bruce
_______________________________________________
Therion mailing list
Therion@speleo.sk
https://mailman.speleo.sk/listinfo/therion
